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postgres.c File Reference
#include "postgres.h"
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <unistd.h>
#include <sys/socket.h>
#include "rusagestub.h"
#include "access/parallel.h"
#include "access/printtup.h"
#include "access/xact.h"
#include "catalog/pg_type.h"
#include "commands/async.h"
#include "commands/prepare.h"
#include "libpq/libpq.h"
#include "libpq/pqformat.h"
#include "libpq/pqsignal.h"
#include "miscadmin.h"
#include "nodes/print.h"
#include "optimizer/planner.h"
#include "pgstat.h"
#include "pg_trace.h"
#include "parser/analyze.h"
#include "parser/parser.h"
#include "pg_getopt.h"
#include "postmaster/autovacuum.h"
#include "postmaster/postmaster.h"
#include "replication/slot.h"
#include "replication/walsender.h"
#include "rewrite/rewriteHandler.h"
#include "storage/bufmgr.h"
#include "storage/ipc.h"
#include "storage/proc.h"
#include "storage/procsignal.h"
#include "storage/sinval.h"
#include "tcop/fastpath.h"
#include "tcop/pquery.h"
#include "tcop/tcopprot.h"
#include "tcop/utility.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/ps_status.h"
#include "utils/snapmgr.h"
#include "utils/timeout.h"
#include "utils/timestamp.h"
#include "mb/pg_wchar.h"
Include dependency graph for postgres.c:

Go to the source code of this file.

Functions

static int InteractiveBackend (StringInfo inBuf)
 
static int interactive_getc (void)
 
static int SocketBackend (StringInfo inBuf)
 
static int ReadCommand (StringInfo inBuf)
 
static void forbidden_in_wal_sender (char firstchar)
 
static Listpg_rewrite_query (Query *query)
 
static bool check_log_statement (List *stmt_list)
 
static int errdetail_execute (List *raw_parsetree_list)
 
static int errdetail_params (ParamListInfo params)
 
static int errdetail_abort (void)
 
static int errdetail_recovery_conflict (void)
 
static void start_xact_command (void)
 
static void finish_xact_command (void)
 
static bool IsTransactionExitStmt (Node *parsetree)
 
static bool IsTransactionExitStmtList (List *pstmts)
 
static bool IsTransactionStmtList (List *pstmts)
 
static void drop_unnamed_stmt (void)
 
static void SigHupHandler (SIGNAL_ARGS)
 
static void log_disconnections (int code, Datum arg)
 
void ProcessClientReadInterrupt (bool blocked)
 
void ProcessClientWriteInterrupt (bool blocked)
 
Listpg_parse_query (const char *query_string)
 
Listpg_analyze_and_rewrite (RawStmt *parsetree, const char *query_string, Oid *paramTypes, int numParams)
 
Listpg_analyze_and_rewrite_params (RawStmt *parsetree, const char *query_string, ParserSetupHook parserSetup, void *parserSetupArg)
 
PlannedStmtpg_plan_query (Query *querytree, int cursorOptions, ParamListInfo boundParams)
 
Listpg_plan_queries (List *querytrees, int cursorOptions, ParamListInfo boundParams)
 
static void exec_simple_query (const char *query_string)
 
static void exec_parse_message (const char *query_string, const char *stmt_name, Oid *paramTypes, int numParams)
 
static void exec_bind_message (StringInfo input_message)
 
static void exec_execute_message (const char *portal_name, long max_rows)
 
int check_log_duration (char *msec_str, bool was_logged)
 
static void exec_describe_statement_message (const char *stmt_name)
 
static void exec_describe_portal_message (const char *portal_name)
 
void quickdie (SIGNAL_ARGS)
 
void die (SIGNAL_ARGS)
 
void StatementCancelHandler (SIGNAL_ARGS)
 
void FloatExceptionHandler (SIGNAL_ARGS)
 
void RecoveryConflictInterrupt (ProcSignalReason reason)
 
void ProcessInterrupts (void)
 
pg_stack_base_t set_stack_base (void)
 
void restore_stack_base (pg_stack_base_t base)
 
void check_stack_depth (void)
 
bool stack_is_too_deep (void)
 
bool check_max_stack_depth (int *newval, void **extra, GucSource source)
 
void assign_max_stack_depth (int newval, void *extra)
 
void set_debug_options (int debug_flag, GucContext context, GucSource source)
 
bool set_plan_disabling_options (const char *arg, GucContext context, GucSource source)
 
const char * get_stats_option_name (const char *arg)
 
void process_postgres_switches (int argc, char *argv[], GucContext ctx, const char **dbname)
 
void PostgresMain (int argc, char *argv[], const char *dbname, const char *username)
 
long get_stack_depth_rlimit (void)
 
void ResetUsage (void)
 
void ShowUsage (const char *title)
 

Variables

const char * debug_query_string
 
CommandDest whereToSendOutput = DestDebug
 
bool Log_disconnections = false
 
int log_statement = LOGSTMT_NONE
 
int max_stack_depth = 100
 
int PostAuthDelay = 0
 
static long max_stack_depth_bytes = 100 * 1024L
 
char * stack_base_ptr = NULL
 
static volatile sig_atomic_t got_SIGHUP = false
 
static bool xact_started = false
 
static bool DoingCommandRead = false
 
static bool doing_extended_query_message = false
 
static bool ignore_till_sync = false
 
static CachedPlanSourceunnamed_stmt_psrc = NULL
 
static const char * userDoption = NULL
 
static bool EchoQuery = false
 
static bool UseSemiNewlineNewline = false
 
static bool RecoveryConflictPending = false
 
static bool RecoveryConflictRetryable = true
 
static ProcSignalReason RecoveryConflictReason
 
static struct rusage Save_r
 
static struct timeval Save_t
 

Function Documentation

void assign_max_stack_depth ( int  newval,
void *  extra 
)

Definition at line 3176 of file postgres.c.

References max_stack_depth_bytes.

3177 {
3178  long newval_bytes = newval * 1024L;
3179 
3180  max_stack_depth_bytes = newval_bytes;
3181 }
static long max_stack_depth_bytes
Definition: postgres.c:107
#define newval
int check_log_duration ( char *  msec_str,
bool  was_logged 
)

Definition at line 2100 of file postgres.c.

References GetCurrentStatementStartTimestamp(), GetCurrentTimestamp(), log_duration, log_min_duration_statement, snprintf(), and TimestampDifference().

Referenced by exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), and HandleFunctionRequest().

2101 {
2103  {
2104  long secs;
2105  int usecs;
2106  int msecs;
2107  bool exceeded;
2108 
2111  &secs, &usecs);
2112  msecs = usecs / 1000;
2113 
2114  /*
2115  * This odd-looking test for log_min_duration_statement being exceeded
2116  * is designed to avoid integer overflow with very long durations:
2117  * don't compute secs * 1000 until we've verified it will fit in int.
2118  */
2119  exceeded = (log_min_duration_statement == 0 ||
2121  (secs > log_min_duration_statement / 1000 ||
2122  secs * 1000 + msecs >= log_min_duration_statement)));
2123 
2124  if (exceeded || log_duration)
2125  {
2126  snprintf(msec_str, 32, "%ld.%03d",
2127  secs * 1000 + msecs, usecs % 1000);
2128  if (exceeded && !was_logged)
2129  return 2;
2130  else
2131  return 1;
2132  }
2133  }
2134 
2135  return 0;
2136 }
int log_min_duration_statement
Definition: guc.c:455
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1569
int snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3
bool log_duration
Definition: guc.c:434
void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: timestamp.c:1623
TimestampTz GetCurrentStatementStartTimestamp(void)
Definition: xact.c:716
static bool check_log_statement ( List stmt_list)
static

Definition at line 2063 of file postgres.c.

References GetCommandLogLevel(), lfirst, log_statement, LOGSTMT_ALL, and LOGSTMT_NONE.

Referenced by exec_execute_message(), and exec_simple_query().

2064 {
2065  ListCell *stmt_item;
2066 
2067  if (log_statement == LOGSTMT_NONE)
2068  return false;
2069  if (log_statement == LOGSTMT_ALL)
2070  return true;
2071 
2072  /* Else we have to inspect the statement(s) to see whether to log */
2073  foreach(stmt_item, stmt_list)
2074  {
2075  Node *stmt = (Node *) lfirst(stmt_item);
2076 
2077  if (GetCommandLogLevel(stmt) <= log_statement)
2078  return true;
2079  }
2080 
2081  return false;
2082 }
Definition: nodes.h:508
#define lfirst(lc)
Definition: pg_list.h:106
int log_statement
Definition: postgres.c:91
LogStmtLevel GetCommandLogLevel(Node *parsetree)
Definition: utility.c:2835
bool check_max_stack_depth ( int *  newval,
void **  extra,
GucSource  source 
)

Definition at line 3159 of file postgres.c.

References get_stack_depth_rlimit(), GUC_check_errdetail, GUC_check_errhint, and STACK_DEPTH_SLOP.

3160 {
3161  long newval_bytes = *newval * 1024L;
3162  long stack_rlimit = get_stack_depth_rlimit();
3163 
3164  if (stack_rlimit > 0 && newval_bytes > stack_rlimit - STACK_DEPTH_SLOP)
3165  {
3166  GUC_check_errdetail("\"max_stack_depth\" must not exceed %ldkB.",
3167  (stack_rlimit - STACK_DEPTH_SLOP) / 1024L);
3168  GUC_check_errhint("Increase the platform's stack depth limit via \"ulimit -s\" or local equivalent.");
3169  return false;
3170  }
3171  return true;
3172 }
#define GUC_check_errdetail
Definition: guc.h:407
long get_stack_depth_rlimit(void)
Definition: postgres.c:4340
#define newval
#define GUC_check_errhint
Definition: guc.h:411
#define STACK_DEPTH_SLOP
Definition: tcopprot.h:30
void check_stack_depth ( void  )

Definition at line 3096 of file postgres.c.

References ereport, errcode(), errhint(), errmsg(), ERROR, max_stack_depth, and stack_is_too_deep().

Referenced by BuildTupleRemapInfo(), clean_NOT_intree(), clean_stopword_intree(), cntsize(), contains_required_value(), convertJsonbValue(), copyObject(), Cover(), datum_to_json(), datum_to_jsonb(), dofindsubquery(), EventTriggerInvoke(), ExecInitExpr(), ExecMakeFunctionResultNoSets(), ExecMakeFunctionResultSet(), execute(), expression_tree_mutator(), expression_tree_walker(), fillQT(), findoprnd(), findoprnd_recurse(), flatten_grouping_sets(), FreePageManagerDumpBtree(), freetree(), generate_partition_qual(), get_query_def(), get_rule_expr(), get_setop_query(), gistSplit(), hash_range(), hk_depth_search(), infix(), inline_set_returning_function(), int_query_opr_selec(), JsonbDeepContains(), JumbleExpr(), ltree_execute(), makepol(), maketree(), MatchText(), parse_array(), parse_object(), plainnode(), plperl_hash_from_tuple(), plperl_sv_to_datum(), QT2QTN(), QTNBinary(), QTNClearFlags(), QTNCopy(), QTNFree(), QTNodeCompare(), QTNSort(), QTNTernary(), range_cmp(), range_in(), range_out(), range_recv(), range_send(), raw_expression_tree_walker(), record_cmp(), record_eq(), record_in(), record_out(), record_recv(), record_send(), setPath(), split_array(), TQExamine(), TQRemap(), transformExprRecurse(), transformSetOperationTree(), TS_execute(), TS_execute_ternary(), TS_phrase_execute(), tsquery_opr_selec(), and tsquery_requires_match().

3097 {
3098  if (stack_is_too_deep())
3099  {
3100  ereport(ERROR,
3101  (errcode(ERRCODE_STATEMENT_TOO_COMPLEX),
3102  errmsg("stack depth limit exceeded"),
3103  errhint("Increase the configuration parameter \"max_stack_depth\" (currently %dkB), "
3104  "after ensuring the platform's stack depth limit is adequate.",
3105  max_stack_depth)));
3106  }
3107 }
int errhint(const char *fmt,...)
Definition: elog.c:987
int errcode(int sqlerrcode)
Definition: elog.c:575
#define ERROR
Definition: elog.h:43
#define ereport(elevel, rest)
Definition: elog.h:122
int max_stack_depth
Definition: postgres.c:94
int errmsg(const char *fmt,...)
Definition: elog.c:797
bool stack_is_too_deep(void)
Definition: postgres.c:3110
void die ( SIGNAL_ARGS  )

Definition at line 2617 of file postgres.c.

References DestRemote, DoingCommandRead, InterruptPending, MyLatch, proc_exit_inprogress, ProcDiePending, ProcessInterrupts(), SetLatch(), and whereToSendOutput.

Referenced by AutoVacWorkerMain(), bootstrap_signals(), ParallelWorkerMain(), PostgresMain(), and WalSndSignals().

2618 {
2619  int save_errno = errno;
2620 
2621  /* Don't joggle the elbow of proc_exit */
2622  if (!proc_exit_inprogress)
2623  {
2624  InterruptPending = true;
2625  ProcDiePending = true;
2626  }
2627 
2628  /* If we're still here, waken anything waiting on the process latch */
2629  SetLatch(MyLatch);
2630 
2631  /*
2632  * If we're in single user mode, we want to quit immediately - we can't
2633  * rely on latches as they wouldn't work when stdin/stdout is a file.
2634  * Rather ugly, but it's unlikely to be worthwhile to invest much more
2635  * effort just for the benefit of single user mode.
2636  */
2639 
2640  errno = save_errno;
2641 }
void ProcessInterrupts(void)
Definition: postgres.c:2819
volatile bool InterruptPending
Definition: globals.c:29
void SetLatch(volatile Latch *latch)
Definition: latch.c:380
bool proc_exit_inprogress
Definition: ipc.c:40
static bool DoingCommandRead
Definition: postgres.c:142
volatile bool ProcDiePending
Definition: globals.c:31
struct Latch * MyLatch
Definition: globals.c:51
CommandDest whereToSendOutput
Definition: postgres.c:86
static void drop_unnamed_stmt ( void  )
static

Definition at line 2531 of file postgres.c.

References DropCachedPlan(), NULL, and unnamed_stmt_psrc.

Referenced by exec_parse_message(), exec_simple_query(), and PostgresMain().

2532 {
2533  /* paranoia to avoid a dangling pointer in case of error */
2534  if (unnamed_stmt_psrc)
2535  {
2537 
2539  DropCachedPlan(psrc);
2540  }
2541 }
static CachedPlanSource * unnamed_stmt_psrc
Definition: postgres.c:156
#define NULL
Definition: c.h:226
void DropCachedPlan(CachedPlanSource *plansource)
Definition: plancache.c:485
static int errdetail_abort ( void  )
static

Definition at line 2240 of file postgres.c.

References errdetail(), MyProc, and PGPROC::recoveryConflictPending.

Referenced by exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), and exec_simple_query().

2241 {
2243  errdetail("abort reason: recovery conflict");
2244 
2245  return 0;
2246 }
PGPROC * MyProc
Definition: proc.c:67
bool recoveryConflictPending
Definition: proc.h:113
int errdetail(const char *fmt,...)
Definition: elog.c:873
static int errdetail_execute ( List raw_parsetree_list)
static

Definition at line 2145 of file postgres.c.

References castNode, errdetail(), FetchPreparedStatement(), IsA, lfirst, ExecuteStmt::name, and RawStmt::stmt.

Referenced by exec_simple_query().

2146 {
2147  ListCell *parsetree_item;
2148 
2149  foreach(parsetree_item, raw_parsetree_list)
2150  {
2151  RawStmt *parsetree = castNode(RawStmt, lfirst(parsetree_item));
2152 
2153  if (IsA(parsetree->stmt, ExecuteStmt))
2154  {
2155  ExecuteStmt *stmt = (ExecuteStmt *) parsetree->stmt;
2156  PreparedStatement *pstmt;
2157 
2158  pstmt = FetchPreparedStatement(stmt->name, false);
2159  if (pstmt)
2160  {
2161  errdetail("prepare: %s", pstmt->plansource->query_string);
2162  return 0;
2163  }
2164  }
2165  }
2166 
2167  return 0;
2168 }
#define IsA(nodeptr, _type_)
Definition: nodes.h:559
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
Node * stmt
Definition: parsenodes.h:1337
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define lfirst(lc)
Definition: pg_list.h:106
char * name
Definition: parsenodes.h:3180
PreparedStatement * FetchPreparedStatement(const char *stmt_name, bool throwError)
Definition: prepare.c:494
static int errdetail_params ( ParamListInfo  params)
static

Definition at line 2176 of file postgres.c.

References appendStringInfo(), appendStringInfoCharMacro, appendStringInfoString(), StringInfoData::data, errdetail(), getTypeOutputInfo(), initStringInfo(), IsAbortedTransactionBlockState(), ParamExternData::isnull, MemoryContextSwitchTo(), MessageContext, ParamListInfoData::numParams, OidIsValid, OidOutputFunctionCall(), ParamListInfoData::params, pfree(), ParamExternData::ptype, and ParamExternData::value.

Referenced by exec_bind_message(), and exec_execute_message().

2177 {
2178  /* We mustn't call user-defined I/O functions when in an aborted xact */
2179  if (params && params->numParams > 0 && !IsAbortedTransactionBlockState())
2180  {
2181  StringInfoData param_str;
2182  MemoryContext oldcontext;
2183  int paramno;
2184 
2185  /* Make sure any trash is generated in MessageContext */
2186  oldcontext = MemoryContextSwitchTo(MessageContext);
2187 
2188  initStringInfo(&param_str);
2189 
2190  for (paramno = 0; paramno < params->numParams; paramno++)
2191  {
2192  ParamExternData *prm = &params->params[paramno];
2193  Oid typoutput;
2194  bool typisvarlena;
2195  char *pstring;
2196  char *p;
2197 
2198  appendStringInfo(&param_str, "%s$%d = ",
2199  paramno > 0 ? ", " : "",
2200  paramno + 1);
2201 
2202  if (prm->isnull || !OidIsValid(prm->ptype))
2203  {
2204  appendStringInfoString(&param_str, "NULL");
2205  continue;
2206  }
2207 
2208  getTypeOutputInfo(prm->ptype, &typoutput, &typisvarlena);
2209 
2210  pstring = OidOutputFunctionCall(typoutput, prm->value);
2211 
2212  appendStringInfoCharMacro(&param_str, '\'');
2213  for (p = pstring; *p; p++)
2214  {
2215  if (*p == '\'') /* double single quotes */
2216  appendStringInfoCharMacro(&param_str, *p);
2217  appendStringInfoCharMacro(&param_str, *p);
2218  }
2219  appendStringInfoCharMacro(&param_str, '\'');
2220 
2221  pfree(pstring);
2222  }
2223 
2224  errdetail("parameters: %s", param_str.data);
2225 
2226  pfree(param_str.data);
2227 
2228  MemoryContextSwitchTo(oldcontext);
2229  }
2230 
2231  return 0;
2232 }
ParamExternData params[FLEXIBLE_ARRAY_MEMBER]
Definition: params.h:76
Datum value
Definition: params.h:56
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2600
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
unsigned int Oid
Definition: postgres_ext.h:31
#define OidIsValid(objectId)
Definition: c.h:534
#define appendStringInfoCharMacro(str, ch)
Definition: stringinfo.h:135
void pfree(void *pointer)
Definition: mcxt.c:992
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:110
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:189
int errdetail(const char *fmt,...)
Definition: elog.c:873
void initStringInfo(StringInfo str)
Definition: stringinfo.c:65
MemoryContext MessageContext
Definition: mcxt.c:47
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:2006
bool isnull
Definition: params.h:57
static int errdetail_recovery_conflict ( void  )
static

Definition at line 2254 of file postgres.c.

References errdetail(), PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_TABLESPACE, and RecoveryConflictReason.

Referenced by ProcessInterrupts().

2255 {
2256  switch (RecoveryConflictReason)
2257  {
2259  errdetail("User was holding shared buffer pin for too long.");
2260  break;
2262  errdetail("User was holding a relation lock for too long.");
2263  break;
2265  errdetail("User was or might have been using tablespace that must be dropped.");
2266  break;
2268  errdetail("User query might have needed to see row versions that must be removed.");
2269  break;
2271  errdetail("User transaction caused buffer deadlock with recovery.");
2272  break;
2274  errdetail("User was connected to a database that must be dropped.");
2275  break;
2276  default:
2277  break;
2278  /* no errdetail */
2279  }
2280 
2281  return 0;
2282 }
int errdetail(const char *fmt,...)
Definition: elog.c:873
static ProcSignalReason RecoveryConflictReason
Definition: postgres.c:166
static void exec_bind_message ( StringInfo  input_message)
static

Definition at line 1458 of file postgres.c.

References analyze_requires_snapshot(), check_log_duration(), CachedPlanSource::commandTag, CreatePortal(), StringInfoData::cursor, StringInfoData::data, DEBUG2, debug_query_string, DestRemote, ereport, errcode(), errdetail_abort(), errdetail_params(), errhidestmt(), errmsg(), ERROR, FetchPreparedStatement(), GetCachedPlan(), GetTransactionSnapshot(), getTypeBinaryInputInfo(), getTypeInputInfo(), i, InvalidSnapshot, IsAbortedTransactionBlockState(), ParamExternData::isnull, IsTransactionExitStmt(), StringInfoData::len, LOG, log_statement_stats, StringInfoData::maxlen, MemoryContextSwitchTo(), MessageContext, NULL, CachedPlanSource::num_params, ParamListInfoData::numParams, offsetof, OidInputFunctionCall(), OidReceiveFunctionCall(), palloc(), PARAM_FLAG_CONST, CachedPlanSource::param_types, ParamListInfoData::paramFetch, ParamListInfoData::paramFetchArg, ParamListInfoData::paramMask, ParamListInfoData::params, ParamListInfoData::parserSetup, ParamListInfoData::parserSetupArg, ParamExternData::pflags, pfree(), pg_client_to_server(), pgstat_report_activity(), PreparedStatement::plansource, PopActiveSnapshot(), PortalDefineQuery(), PortalGetHeapMemory, PortalSetResultFormat(), PortalStart(), pq_getmsgbytes(), pq_getmsgend(), pq_getmsgint(), pq_getmsgstring(), pq_putemptymessage(), pstrdup(), ParamExternData::ptype, PushActiveSnapshot(), CachedPlanSource::query_string, CachedPlanSource::raw_parse_tree, ResetUsage(), set_ps_display(), ShowUsage(), start_xact_command(), STATE_RUNNING, RawStmt::stmt, CachedPlan::stmt_list, unnamed_stmt_psrc, ParamExternData::value, and whereToSendOutput.

Referenced by PostgresMain().

1459 {
1460  const char *portal_name;
1461  const char *stmt_name;
1462  int numPFormats;
1463  int16 *pformats = NULL;
1464  int numParams;
1465  int numRFormats;
1466  int16 *rformats = NULL;
1467  CachedPlanSource *psrc;
1468  CachedPlan *cplan;
1469  Portal portal;
1470  char *query_string;
1471  char *saved_stmt_name;
1472  ParamListInfo params;
1473  MemoryContext oldContext;
1474  bool save_log_statement_stats = log_statement_stats;
1475  bool snapshot_set = false;
1476  char msec_str[32];
1477 
1478  /* Get the fixed part of the message */
1479  portal_name = pq_getmsgstring(input_message);
1480  stmt_name = pq_getmsgstring(input_message);
1481 
1482  ereport(DEBUG2,
1483  (errmsg("bind %s to %s",
1484  *portal_name ? portal_name : "<unnamed>",
1485  *stmt_name ? stmt_name : "<unnamed>")));
1486 
1487  /* Find prepared statement */
1488  if (stmt_name[0] != '\0')
1489  {
1490  PreparedStatement *pstmt;
1491 
1492  pstmt = FetchPreparedStatement(stmt_name, true);
1493  psrc = pstmt->plansource;
1494  }
1495  else
1496  {
1497  /* special-case the unnamed statement */
1498  psrc = unnamed_stmt_psrc;
1499  if (!psrc)
1500  ereport(ERROR,
1501  (errcode(ERRCODE_UNDEFINED_PSTATEMENT),
1502  errmsg("unnamed prepared statement does not exist")));
1503  }
1504 
1505  /*
1506  * Report query to various monitoring facilities.
1507  */
1509 
1511 
1512  set_ps_display("BIND", false);
1513 
1514  if (save_log_statement_stats)
1515  ResetUsage();
1516 
1517  /*
1518  * Start up a transaction command so we can call functions etc. (Note that
1519  * this will normally change current memory context.) Nothing happens if
1520  * we are already in one.
1521  */
1523 
1524  /* Switch back to message context */
1526 
1527  /* Get the parameter format codes */
1528  numPFormats = pq_getmsgint(input_message, 2);
1529  if (numPFormats > 0)
1530  {
1531  int i;
1532 
1533  pformats = (int16 *) palloc(numPFormats * sizeof(int16));
1534  for (i = 0; i < numPFormats; i++)
1535  pformats[i] = pq_getmsgint(input_message, 2);
1536  }
1537 
1538  /* Get the parameter value count */
1539  numParams = pq_getmsgint(input_message, 2);
1540 
1541  if (numPFormats > 1 && numPFormats != numParams)
1542  ereport(ERROR,
1543  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1544  errmsg("bind message has %d parameter formats but %d parameters",
1545  numPFormats, numParams)));
1546 
1547  if (numParams != psrc->num_params)
1548  ereport(ERROR,
1549  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1550  errmsg("bind message supplies %d parameters, but prepared statement \"%s\" requires %d",
1551  numParams, stmt_name, psrc->num_params)));
1552 
1553  /*
1554  * If we are in aborted transaction state, the only portals we can
1555  * actually run are those containing COMMIT or ROLLBACK commands. We
1556  * disallow binding anything else to avoid problems with infrastructure
1557  * that expects to run inside a valid transaction. We also disallow
1558  * binding any parameters, since we can't risk calling user-defined I/O
1559  * functions.
1560  */
1562  (!(psrc->raw_parse_tree &&
1564  numParams != 0))
1565  ereport(ERROR,
1566  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1567  errmsg("current transaction is aborted, "
1568  "commands ignored until end of transaction block"),
1569  errdetail_abort()));
1570 
1571  /*
1572  * Create the portal. Allow silent replacement of an existing portal only
1573  * if the unnamed portal is specified.
1574  */
1575  if (portal_name[0] == '\0')
1576  portal = CreatePortal(portal_name, true, true);
1577  else
1578  portal = CreatePortal(portal_name, false, false);
1579 
1580  /*
1581  * Prepare to copy stuff into the portal's memory context. We do all this
1582  * copying first, because it could possibly fail (out-of-memory) and we
1583  * don't want a failure to occur between GetCachedPlan and
1584  * PortalDefineQuery; that would result in leaking our plancache refcount.
1585  */
1586  oldContext = MemoryContextSwitchTo(PortalGetHeapMemory(portal));
1587 
1588  /* Copy the plan's query string into the portal */
1589  query_string = pstrdup(psrc->query_string);
1590 
1591  /* Likewise make a copy of the statement name, unless it's unnamed */
1592  if (stmt_name[0])
1593  saved_stmt_name = pstrdup(stmt_name);
1594  else
1595  saved_stmt_name = NULL;
1596 
1597  /*
1598  * Set a snapshot if we have parameters to fetch (since the input
1599  * functions might need it) or the query isn't a utility command (and
1600  * hence could require redoing parse analysis and planning). We keep the
1601  * snapshot active till we're done, so that plancache.c doesn't have to
1602  * take new ones.
1603  */
1604  if (numParams > 0 ||
1605  (psrc->raw_parse_tree &&
1607  {
1609  snapshot_set = true;
1610  }
1611 
1612  /*
1613  * Fetch parameters, if any, and store in the portal's memory context.
1614  */
1615  if (numParams > 0)
1616  {
1617  int paramno;
1618 
1619  params = (ParamListInfo) palloc(offsetof(ParamListInfoData, params) +
1620  numParams * sizeof(ParamExternData));
1621  /* we have static list of params, so no hooks needed */
1622  params->paramFetch = NULL;
1623  params->paramFetchArg = NULL;
1624  params->parserSetup = NULL;
1625  params->parserSetupArg = NULL;
1626  params->numParams = numParams;
1627  params->paramMask = NULL;
1628 
1629  for (paramno = 0; paramno < numParams; paramno++)
1630  {
1631  Oid ptype = psrc->param_types[paramno];
1632  int32 plength;
1633  Datum pval;
1634  bool isNull;
1635  StringInfoData pbuf;
1636  char csave;
1637  int16 pformat;
1638 
1639  plength = pq_getmsgint(input_message, 4);
1640  isNull = (plength == -1);
1641 
1642  if (!isNull)
1643  {
1644  const char *pvalue = pq_getmsgbytes(input_message, plength);
1645 
1646  /*
1647  * Rather than copying data around, we just set up a phony
1648  * StringInfo pointing to the correct portion of the message
1649  * buffer. We assume we can scribble on the message buffer so
1650  * as to maintain the convention that StringInfos have a
1651  * trailing null. This is grotty but is a big win when
1652  * dealing with very large parameter strings.
1653  */
1654  pbuf.data = (char *) pvalue;
1655  pbuf.maxlen = plength + 1;
1656  pbuf.len = plength;
1657  pbuf.cursor = 0;
1658 
1659  csave = pbuf.data[plength];
1660  pbuf.data[plength] = '\0';
1661  }
1662  else
1663  {
1664  pbuf.data = NULL; /* keep compiler quiet */
1665  csave = 0;
1666  }
1667 
1668  if (numPFormats > 1)
1669  pformat = pformats[paramno];
1670  else if (numPFormats > 0)
1671  pformat = pformats[0];
1672  else
1673  pformat = 0; /* default = text */
1674 
1675  if (pformat == 0) /* text mode */
1676  {
1677  Oid typinput;
1678  Oid typioparam;
1679  char *pstring;
1680 
1681  getTypeInputInfo(ptype, &typinput, &typioparam);
1682 
1683  /*
1684  * We have to do encoding conversion before calling the
1685  * typinput routine.
1686  */
1687  if (isNull)
1688  pstring = NULL;
1689  else
1690  pstring = pg_client_to_server(pbuf.data, plength);
1691 
1692  pval = OidInputFunctionCall(typinput, pstring, typioparam, -1);
1693 
1694  /* Free result of encoding conversion, if any */
1695  if (pstring && pstring != pbuf.data)
1696  pfree(pstring);
1697  }
1698  else if (pformat == 1) /* binary mode */
1699  {
1700  Oid typreceive;
1701  Oid typioparam;
1702  StringInfo bufptr;
1703 
1704  /*
1705  * Call the parameter type's binary input converter
1706  */
1707  getTypeBinaryInputInfo(ptype, &typreceive, &typioparam);
1708 
1709  if (isNull)
1710  bufptr = NULL;
1711  else
1712  bufptr = &pbuf;
1713 
1714  pval = OidReceiveFunctionCall(typreceive, bufptr, typioparam, -1);
1715 
1716  /* Trouble if it didn't eat the whole buffer */
1717  if (!isNull && pbuf.cursor != pbuf.len)
1718  ereport(ERROR,
1719  (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
1720  errmsg("incorrect binary data format in bind parameter %d",
1721  paramno + 1)));
1722  }
1723  else
1724  {
1725  ereport(ERROR,
1726  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1727  errmsg("unsupported format code: %d",
1728  pformat)));
1729  pval = 0; /* keep compiler quiet */
1730  }
1731 
1732  /* Restore message buffer contents */
1733  if (!isNull)
1734  pbuf.data[plength] = csave;
1735 
1736  params->params[paramno].value = pval;
1737  params->params[paramno].isnull = isNull;
1738 
1739  /*
1740  * We mark the params as CONST. This ensures that any custom plan
1741  * makes full use of the parameter values.
1742  */
1743  params->params[paramno].pflags = PARAM_FLAG_CONST;
1744  params->params[paramno].ptype = ptype;
1745  }
1746  }
1747  else
1748  params = NULL;
1749 
1750  /* Done storing stuff in portal's context */
1751  MemoryContextSwitchTo(oldContext);
1752 
1753  /* Get the result format codes */
1754  numRFormats = pq_getmsgint(input_message, 2);
1755  if (numRFormats > 0)
1756  {
1757  int i;
1758 
1759  rformats = (int16 *) palloc(numRFormats * sizeof(int16));
1760  for (i = 0; i < numRFormats; i++)
1761  rformats[i] = pq_getmsgint(input_message, 2);
1762  }
1763 
1764  pq_getmsgend(input_message);
1765 
1766  /*
1767  * Obtain a plan from the CachedPlanSource. Any cruft from (re)planning
1768  * will be generated in MessageContext. The plan refcount will be
1769  * assigned to the Portal, so it will be released at portal destruction.
1770  */
1771  cplan = GetCachedPlan(psrc, params, false);
1772 
1773  /*
1774  * Now we can define the portal.
1775  *
1776  * DO NOT put any code that could possibly throw an error between the
1777  * above GetCachedPlan call and here.
1778  */
1779  PortalDefineQuery(portal,
1780  saved_stmt_name,
1781  query_string,
1782  psrc->commandTag,
1783  cplan->stmt_list,
1784  cplan);
1785 
1786  /* Done with the snapshot used for parameter I/O and parsing/planning */
1787  if (snapshot_set)
1789 
1790  /*
1791  * And we're ready to start portal execution.
1792  */
1793  PortalStart(portal, params, 0, InvalidSnapshot);
1794 
1795  /*
1796  * Apply the result format requests to the portal.
1797  */
1798  PortalSetResultFormat(portal, numRFormats, rformats);
1799 
1800  /*
1801  * Send BindComplete.
1802  */
1804  pq_putemptymessage('2');
1805 
1806  /*
1807  * Emit duration logging if appropriate.
1808  */
1809  switch (check_log_duration(msec_str, false))
1810  {
1811  case 1:
1812  ereport(LOG,
1813  (errmsg("duration: %s ms", msec_str),
1814  errhidestmt(true)));
1815  break;
1816  case 2:
1817  ereport(LOG,
1818  (errmsg("duration: %s ms bind %s%s%s: %s",
1819  msec_str,
1820  *stmt_name ? stmt_name : "<unnamed>",
1821  *portal_name ? "/" : "",
1822  *portal_name ? portal_name : "",
1823  psrc->query_string),
1824  errhidestmt(true),
1825  errdetail_params(params)));
1826  break;
1827  }
1828 
1829  if (save_log_statement_stats)
1830  ShowUsage("BIND MESSAGE STATISTICS");
1831 
1833 }
signed short int16
Definition: c.h:252
ParamExternData params[FLEXIBLE_ARRAY_MEMBER]
Definition: params.h:76
Datum value
Definition: params.h:56
Portal CreatePortal(const char *name, bool allowDup, bool dupSilent)
Definition: portalmem.c:174
void PortalSetResultFormat(Portal portal, int nFormats, int16 *formats)
Definition: pquery.c:620
void * parserSetupArg
Definition: params.h:73
bool analyze_requires_snapshot(RawStmt *parseTree)
Definition: analyze.c:345
void PortalStart(Portal portal, ParamListInfo params, int eflags, Snapshot snapshot)
Definition: pquery.c:439
void PortalDefineQuery(Portal portal, const char *prepStmtName, const char *sourceText, const char *commandTag, List *stmts, CachedPlan *cplan)
Definition: portalmem.c:277
bool log_statement_stats
Definition: guc.c:443
const char * commandTag
Definition: plancache.h:84
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
CachedPlanSource * plansource
Definition: prepare.h:31
const char * pq_getmsgstring(StringInfo msg)
Definition: pqformat.c:621
void ShowUsage(const char *title)
Definition: postgres.c:4383
char * pstrdup(const char *in)
Definition: mcxt.c:1165
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
int errcode(int sqlerrcode)
Definition: elog.c:575
int errhidestmt(bool hide_stmt)
Definition: elog.c:1068
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
static int errdetail_abort(void)
Definition: postgres.c:2240
void PopActiveSnapshot(void)
Definition: snapmgr.c:807
ParserSetupHook parserSetup
Definition: params.h:72
struct ParamListInfoData * ParamListInfo
Definition: params.h:62
#define LOG
Definition: elog.h:26
unsigned int Oid
Definition: postgres_ext.h:31
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:300
const char * pq_getmsgbytes(StringInfo msg, int datalen)
Definition: pqformat.c:550
signed int int32
Definition: c.h:253
static bool IsTransactionExitStmt(Node *parsetree)
Definition: postgres.c:2484
int check_log_duration(char *msec_str, bool was_logged)
Definition: postgres.c:2100
void ResetUsage(void)
Definition: postgres.c:4376
void * paramFetchArg
Definition: params.h:71
ParamFetchHook paramFetch
Definition: params.h:70
void pfree(void *pointer)
Definition: mcxt.c:992
char * pg_client_to_server(const char *s, int len)
Definition: mbutils.c:556
#define ERROR
Definition: elog.h:43
CachedPlan * GetCachedPlan(CachedPlanSource *plansource, ParamListInfo boundParams, bool useResOwner)
Definition: plancache.c:1131
Datum OidReceiveFunctionCall(Oid functionId, StringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:2015
#define DEBUG2
Definition: elog.h:24
Oid * param_types
Definition: plancache.h:85
Node * stmt
Definition: parsenodes.h:1337
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:728
static CachedPlanSource * unnamed_stmt_psrc
Definition: postgres.c:156
struct Bitmapset * paramMask
Definition: params.h:75
static int errdetail_params(ParamListInfo params)
Definition: postgres.c:2176
void getTypeBinaryInputInfo(Oid type, Oid *typReceive, Oid *typIOParam)
Definition: lsyscache.c:2633
void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam)
Definition: lsyscache.c:2567
#define ereport(elevel, rest)
Definition: elog.h:122
struct ParamExternData ParamExternData
const char * debug_query_string
Definition: postgres.c:83
#define InvalidSnapshot
Definition: snapshot.h:25
static void start_xact_command(void)
Definition: postgres.c:2434
uintptr_t Datum
Definition: postgres.h:374
#define NULL
Definition: c.h:226
uint16 pflags
Definition: params.h:58
const char * query_string
Definition: plancache.h:83
#define PortalGetHeapMemory(portal)
Definition: portal.h:203
MemoryContext MessageContext
Definition: mcxt.c:47
struct RawStmt * raw_parse_tree
Definition: plancache.h:82
void * palloc(Size size)
Definition: mcxt.c:891
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
unsigned int pq_getmsgint(StringInfo msg, int b)
Definition: pqformat.c:448
List * stmt_list
Definition: plancache.h:132
void pq_getmsgend(StringInfo msg)
Definition: pqformat.c:677
CommandDest whereToSendOutput
Definition: postgres.c:86
PreparedStatement * FetchPreparedStatement(const char *stmt_name, bool throwError)
Definition: prepare.c:494
bool isnull
Definition: params.h:57
Datum OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1997
#define offsetof(type, field)
Definition: c.h:551
#define PARAM_FLAG_CONST
Definition: params.h:52
static void exec_describe_portal_message ( const char *  portal_name)
static

Definition at line 2383 of file postgres.c.

References DestRemote, ereport, errcode(), errdetail_abort(), errmsg(), ERROR, FetchPortalTargetList(), PortalData::formats, GetPortalByName(), IsAbortedTransactionBlockState(), MemoryContextSwitchTo(), MessageContext, PortalIsValid, pq_putemptymessage(), SendRowDescriptionMessage(), start_xact_command(), PortalData::tupDesc, and whereToSendOutput.

Referenced by PostgresMain().

2384 {
2385  Portal portal;
2386 
2387  /*
2388  * Start up a transaction command. (Note that this will normally change
2389  * current memory context.) Nothing happens if we are already in one.
2390  */
2392 
2393  /* Switch back to message context */
2395 
2396  portal = GetPortalByName(portal_name);
2397  if (!PortalIsValid(portal))
2398  ereport(ERROR,
2399  (errcode(ERRCODE_UNDEFINED_CURSOR),
2400  errmsg("portal \"%s\" does not exist", portal_name)));
2401 
2402  /*
2403  * If we are in aborted transaction state, we can't run
2404  * SendRowDescriptionMessage(), because that needs catalog accesses.
2405  * Hence, refuse to Describe portals that return data. (We shouldn't just
2406  * refuse all Describes, since that might break the ability of some
2407  * clients to issue COMMIT or ROLLBACK commands, if they use code that
2408  * blindly Describes whatever it does.)
2409  */
2411  portal->tupDesc)
2412  ereport(ERROR,
2413  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
2414  errmsg("current transaction is aborted, "
2415  "commands ignored until end of transaction block"),
2416  errdetail_abort()));
2417 
2419  return; /* can't actually do anything... */
2420 
2421  if (portal->tupDesc)
2423  FetchPortalTargetList(portal),
2424  portal->formats);
2425  else
2426  pq_putemptymessage('n'); /* NoData */
2427 }
Portal GetPortalByName(const char *name)
Definition: portalmem.c:129
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
int errcode(int sqlerrcode)
Definition: elog.c:575
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
static int errdetail_abort(void)
Definition: postgres.c:2240
void SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist, int16 *formats)
Definition: printtup.c:188
#define ERROR
Definition: elog.h:43
#define ereport(elevel, rest)
Definition: elog.h:122
#define PortalIsValid(p)
Definition: portal.h:197
static void start_xact_command(void)
Definition: postgres.c:2434
int16 * formats
Definition: portal.h:155
TupleDesc tupDesc
Definition: portal.h:153
MemoryContext MessageContext
Definition: mcxt.c:47
int errmsg(const char *fmt,...)
Definition: elog.c:797
CommandDest whereToSendOutput
Definition: postgres.c:86
List * FetchPortalTargetList(Portal portal)
Definition: pquery.c:332
static void exec_describe_statement_message ( const char *  stmt_name)
static

Definition at line 2290 of file postgres.c.

References Assert, buf, CachedPlanGetTargetList(), DestRemote, ereport, errcode(), errdetail_abort(), errmsg(), ERROR, FetchPreparedStatement(), CachedPlanSource::fixed_result, i, IsAbortedTransactionBlockState(), MemoryContextSwitchTo(), MessageContext, NULL, CachedPlanSource::num_params, CachedPlanSource::param_types, PreparedStatement::plansource, pq_beginmessage(), pq_endmessage(), pq_putemptymessage(), pq_sendint(), CachedPlanSource::resultDesc, SendRowDescriptionMessage(), start_xact_command(), unnamed_stmt_psrc, and whereToSendOutput.

Referenced by PostgresMain().

2291 {
2292  CachedPlanSource *psrc;
2294  int i;
2295 
2296  /*
2297  * Start up a transaction command. (Note that this will normally change
2298  * current memory context.) Nothing happens if we are already in one.
2299  */
2301 
2302  /* Switch back to message context */
2304 
2305  /* Find prepared statement */
2306  if (stmt_name[0] != '\0')
2307  {
2308  PreparedStatement *pstmt;
2309 
2310  pstmt = FetchPreparedStatement(stmt_name, true);
2311  psrc = pstmt->plansource;
2312  }
2313  else
2314  {
2315  /* special-case the unnamed statement */
2316  psrc = unnamed_stmt_psrc;
2317  if (!psrc)
2318  ereport(ERROR,
2319  (errcode(ERRCODE_UNDEFINED_PSTATEMENT),
2320  errmsg("unnamed prepared statement does not exist")));
2321  }
2322 
2323  /* Prepared statements shouldn't have changeable result descs */
2324  Assert(psrc->fixed_result);
2325 
2326  /*
2327  * If we are in aborted transaction state, we can't run
2328  * SendRowDescriptionMessage(), because that needs catalog accesses.
2329  * Hence, refuse to Describe statements that return data. (We shouldn't
2330  * just refuse all Describes, since that might break the ability of some
2331  * clients to issue COMMIT or ROLLBACK commands, if they use code that
2332  * blindly Describes whatever it does.) We can Describe parameters
2333  * without doing anything dangerous, so we don't restrict that.
2334  */
2336  psrc->resultDesc)
2337  ereport(ERROR,
2338  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
2339  errmsg("current transaction is aborted, "
2340  "commands ignored until end of transaction block"),
2341  errdetail_abort()));
2342 
2344  return; /* can't actually do anything... */
2345 
2346  /*
2347  * First describe the parameters...
2348  */
2349  pq_beginmessage(&buf, 't'); /* parameter description message type */
2350  pq_sendint(&buf, psrc->num_params, 2);
2351 
2352  for (i = 0; i < psrc->num_params; i++)
2353  {
2354  Oid ptype = psrc->param_types[i];
2355 
2356  pq_sendint(&buf, (int) ptype, 4);
2357  }
2358  pq_endmessage(&buf);
2359 
2360  /*
2361  * Next send RowDescription or NoData to describe the result...
2362  */
2363  if (psrc->resultDesc)
2364  {
2365  List *tlist;
2366 
2367  /* Get the plan's primary targetlist */
2368  tlist = CachedPlanGetTargetList(psrc);
2369 
2370  SendRowDescriptionMessage(psrc->resultDesc, tlist, NULL);
2371  }
2372  else
2373  pq_putemptymessage('n'); /* NoData */
2374 
2375 }
CachedPlanSource * plansource
Definition: prepare.h:31
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
int errcode(int sqlerrcode)
Definition: elog.c:575
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
static int errdetail_abort(void)
Definition: postgres.c:2240
unsigned int Oid
Definition: postgres_ext.h:31
void SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist, int16 *formats)
Definition: printtup.c:188
void pq_beginmessage(StringInfo buf, char msgtype)
Definition: pqformat.c:88
TupleDesc resultDesc
Definition: plancache.h:91
#define ERROR
Definition: elog.h:43
Oid * param_types
Definition: plancache.h:85
static char * buf
Definition: pg_test_fsync.c:65
static CachedPlanSource * unnamed_stmt_psrc
Definition: postgres.c:156
#define ereport(elevel, rest)
Definition: elog.h:122
static void start_xact_command(void)
Definition: postgres.c:2434
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
List * CachedPlanGetTargetList(CachedPlanSource *plansource)
Definition: plancache.c:1421
MemoryContext MessageContext
Definition: mcxt.c:47
int errmsg(const char *fmt,...)
Definition: elog.c:797
void pq_sendint(StringInfo buf, int i, int b)
Definition: pqformat.c:236
void pq_endmessage(StringInfo buf)
Definition: pqformat.c:344
int i
CommandDest whereToSendOutput
Definition: postgres.c:86
PreparedStatement * FetchPreparedStatement(const char *stmt_name, bool throwError)
Definition: prepare.c:494
Definition: pg_list.h:45
static void exec_execute_message ( const char *  portal_name,
long  max_rows 
)
static

Definition at line 1841 of file postgres.c.

References _, Assert, PortalData::atStart, BeginCommand(), CHECK_FOR_INTERRUPTS, check_log_duration(), check_log_statement(), CommandCounterIncrement(), PortalData::commandTag, COMPLETION_TAG_BUFSIZE, CreateDestReceiver(), debug_query_string, DestRemote, DestRemoteExecute, EndCommand(), ereport, errcode(), errdetail_abort(), errdetail_params(), errhidestmt(), errmsg(), ERROR, FETCH_ALL, finish_xact_command(), GetPortalByName(), IsAbortedTransactionBlockState(), IsTransactionExitStmtList(), IsTransactionStmtList(), LOG, log_statement_stats, NIL, NULL, NullCommand(), pgstat_report_activity(), PortalIsValid, PortalData::portalParams, PortalRun(), pq_putemptymessage(), PortalData::prepStmtName, pstrdup(), _DestReceiver::rDestroy, ResetUsage(), set_ps_display(), SetRemoteDestReceiverParams(), ShowUsage(), PortalData::sourceText, start_xact_command(), STATE_RUNNING, PortalData::stmts, and whereToSendOutput.

Referenced by PostgresMain().

1842 {
1843  CommandDest dest;
1844  DestReceiver *receiver;
1845  Portal portal;
1846  bool completed;
1847  char completionTag[COMPLETION_TAG_BUFSIZE];
1848  const char *sourceText;
1849  const char *prepStmtName;
1850  ParamListInfo portalParams;
1851  bool save_log_statement_stats = log_statement_stats;
1852  bool is_xact_command;
1853  bool execute_is_fetch;
1854  bool was_logged = false;
1855  char msec_str[32];
1856 
1857  /* Adjust destination to tell printtup.c what to do */
1858  dest = whereToSendOutput;
1859  if (dest == DestRemote)
1860  dest = DestRemoteExecute;
1861 
1862  portal = GetPortalByName(portal_name);
1863  if (!PortalIsValid(portal))
1864  ereport(ERROR,
1865  (errcode(ERRCODE_UNDEFINED_CURSOR),
1866  errmsg("portal \"%s\" does not exist", portal_name)));
1867 
1868  /*
1869  * If the original query was a null string, just return
1870  * EmptyQueryResponse.
1871  */
1872  if (portal->commandTag == NULL)
1873  {
1874  Assert(portal->stmts == NIL);
1875  NullCommand(dest);
1876  return;
1877  }
1878 
1879  /* Does the portal contain a transaction command? */
1880  is_xact_command = IsTransactionStmtList(portal->stmts);
1881 
1882  /*
1883  * We must copy the sourceText and prepStmtName into MessageContext in
1884  * case the portal is destroyed during finish_xact_command. Can avoid the
1885  * copy if it's not an xact command, though.
1886  */
1887  if (is_xact_command)
1888  {
1889  sourceText = pstrdup(portal->sourceText);
1890  if (portal->prepStmtName)
1891  prepStmtName = pstrdup(portal->prepStmtName);
1892  else
1893  prepStmtName = "<unnamed>";
1894 
1895  /*
1896  * An xact command shouldn't have any parameters, which is a good
1897  * thing because they wouldn't be around after finish_xact_command.
1898  */
1899  portalParams = NULL;
1900  }
1901  else
1902  {
1903  sourceText = portal->sourceText;
1904  if (portal->prepStmtName)
1905  prepStmtName = portal->prepStmtName;
1906  else
1907  prepStmtName = "<unnamed>";
1908  portalParams = portal->portalParams;
1909  }
1910 
1911  /*
1912  * Report query to various monitoring facilities.
1913  */
1914  debug_query_string = sourceText;
1915 
1917 
1918  set_ps_display(portal->commandTag, false);
1919 
1920  if (save_log_statement_stats)
1921  ResetUsage();
1922 
1923  BeginCommand(portal->commandTag, dest);
1924 
1925  /*
1926  * Create dest receiver in MessageContext (we don't want it in transaction
1927  * context, because that may get deleted if portal contains VACUUM).
1928  */
1929  receiver = CreateDestReceiver(dest);
1930  if (dest == DestRemoteExecute)
1931  SetRemoteDestReceiverParams(receiver, portal);
1932 
1933  /*
1934  * Ensure we are in a transaction command (this should normally be the
1935  * case already due to prior BIND).
1936  */
1938 
1939  /*
1940  * If we re-issue an Execute protocol request against an existing portal,
1941  * then we are only fetching more rows rather than completely re-executing
1942  * the query from the start. atStart is never reset for a v3 portal, so we
1943  * are safe to use this check.
1944  */
1945  execute_is_fetch = !portal->atStart;
1946 
1947  /* Log immediately if dictated by log_statement */
1948  if (check_log_statement(portal->stmts))
1949  {
1950  ereport(LOG,
1951  (errmsg("%s %s%s%s: %s",
1952  execute_is_fetch ?
1953  _("execute fetch from") :
1954  _("execute"),
1955  prepStmtName,
1956  *portal_name ? "/" : "",
1957  *portal_name ? portal_name : "",
1958  sourceText),
1959  errhidestmt(true),
1960  errdetail_params(portalParams)));
1961  was_logged = true;
1962  }
1963 
1964  /*
1965  * If we are in aborted transaction state, the only portals we can
1966  * actually run are those containing COMMIT or ROLLBACK commands.
1967  */
1969  !IsTransactionExitStmtList(portal->stmts))
1970  ereport(ERROR,
1971  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1972  errmsg("current transaction is aborted, "
1973  "commands ignored until end of transaction block"),
1974  errdetail_abort()));
1975 
1976  /* Check for cancel signal before we start execution */
1978 
1979  /*
1980  * Okay to run the portal.
1981  */
1982  if (max_rows <= 0)
1983  max_rows = FETCH_ALL;
1984 
1985  completed = PortalRun(portal,
1986  max_rows,
1987  true, /* always top level */
1988  receiver,
1989  receiver,
1990  completionTag);
1991 
1992  (*receiver->rDestroy) (receiver);
1993 
1994  if (completed)
1995  {
1996  if (is_xact_command)
1997  {
1998  /*
1999  * If this was a transaction control statement, commit it. We
2000  * will start a new xact command for the next command (if any).
2001  */
2003  }
2004  else
2005  {
2006  /*
2007  * We need a CommandCounterIncrement after every query, except
2008  * those that start or end a transaction block.
2009  */
2011  }
2012 
2013  /* Send appropriate CommandComplete to client */
2014  EndCommand(completionTag, dest);
2015  }
2016  else
2017  {
2018  /* Portal run not complete, so send PortalSuspended */
2020  pq_putemptymessage('s');
2021  }
2022 
2023  /*
2024  * Emit duration logging if appropriate.
2025  */
2026  switch (check_log_duration(msec_str, was_logged))
2027  {
2028  case 1:
2029  ereport(LOG,
2030  (errmsg("duration: %s ms", msec_str),
2031  errhidestmt(true)));
2032  break;
2033  case 2:
2034  ereport(LOG,
2035  (errmsg("duration: %s ms %s %s%s%s: %s",
2036  msec_str,
2037  execute_is_fetch ?
2038  _("execute fetch from") :
2039  _("execute"),
2040  prepStmtName,
2041  *portal_name ? "/" : "",
2042  *portal_name ? portal_name : "",
2043  sourceText),
2044  errhidestmt(true),
2045  errdetail_params(portalParams)));
2046  break;
2047  }
2048 
2049  if (save_log_statement_stats)
2050  ShowUsage("EXECUTE MESSAGE STATISTICS");
2051 
2053 }
static bool IsTransactionStmtList(List *pstmts)
Definition: postgres.c:2516
#define NIL
Definition: pg_list.h:69
void SetRemoteDestReceiverParams(DestReceiver *self, Portal portal)
Definition: printtup.c:101
void(* rDestroy)(DestReceiver *self)
Definition: dest.h:126
static void finish_xact_command(void)
Definition: postgres.c:2452
CommandDest
Definition: dest.h:86
bool log_statement_stats
Definition: guc.c:443
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
void ShowUsage(const char *title)
Definition: postgres.c:4383
Portal GetPortalByName(const char *name)
Definition: portalmem.c:129
char * pstrdup(const char *in)
Definition: mcxt.c:1165
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
int errcode(int sqlerrcode)
Definition: elog.c:575
int errhidestmt(bool hide_stmt)
Definition: elog.c:1068
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
static int errdetail_abort(void)
Definition: postgres.c:2240
void BeginCommand(const char *commandTag, CommandDest dest)
Definition: dest.c:99
#define LOG
Definition: elog.h:26
List * stmts
Definition: portal.h:136
int check_log_duration(char *msec_str, bool was_logged)
Definition: postgres.c:2100
void ResetUsage(void)
Definition: postgres.c:4376
ParamListInfo portalParams
Definition: portal.h:139
void EndCommand(const char *commandTag, CommandDest dest)
Definition: dest.c:157
#define ERROR
Definition: elog.h:43
const char * commandTag
Definition: portal.h:135
DestReceiver * CreateDestReceiver(CommandDest dest)
Definition: dest.c:109
static int errdetail_params(ParamListInfo params)
Definition: postgres.c:2176
#define ereport(elevel, rest)
Definition: elog.h:122
const char * debug_query_string
Definition: postgres.c:83
static bool check_log_statement(List *stmt_list)
Definition: postgres.c:2063
#define PortalIsValid(p)
Definition: portal.h:197
static void start_xact_command(void)
Definition: postgres.c:2434
void CommandCounterIncrement(void)
Definition: xact.c:921
const char * sourceText
Definition: portal.h:134
#define COMPLETION_TAG_BUFSIZE
Definition: dest.h:74
#define NULL
Definition: c.h:226
bool PortalRun(Portal portal, long count, bool isTopLevel, DestReceiver *dest, DestReceiver *altdest, char *completionTag)
Definition: pquery.c:682
#define Assert(condition)
Definition: c.h:671
static bool IsTransactionExitStmtList(List *pstmts)
Definition: postgres.c:2501
bool atStart
Definition: portal.h:184
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
CommandDest whereToSendOutput
Definition: postgres.c:86
#define _(x)
Definition: elog.c:84
const char * prepStmtName
Definition: portal.h:118
void NullCommand(CommandDest dest)
Definition: dest.c:198
#define FETCH_ALL
Definition: parsenodes.h:2563
static void exec_parse_message ( const char *  query_string,
const char *  stmt_name,
Oid paramTypes,
int  numParams 
)
static

Definition at line 1196 of file postgres.c.

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate(), analyze_requires_snapshot(), castNode, CHECK_FOR_INTERRUPTS, check_log_duration(), CommandCounterIncrement(), CompleteCachedPlan(), CachedPlanSource::context, CreateCachedPlan(), CreateCommandTag(), CURSOR_OPT_PARALLEL_OK, DEBUG2, debug_query_string, DestRemote, drop_unnamed_stmt(), ereport, errcode(), errdetail_abort(), errhidestmt(), errmsg(), ERROR, GetTransactionSnapshot(), i, InvalidOid, IsAbortedTransactionBlockState(), IsTransactionExitStmt(), linitial, list_length(), LOG, log_parser_stats, log_statement_stats, MemoryContextSetParent(), MemoryContextSwitchTo(), MessageContext, NIL, NULL, parse_analyze_varparams(), pg_parse_query(), pg_rewrite_query(), pgstat_report_activity(), PopActiveSnapshot(), pq_putemptymessage(), PushActiveSnapshot(), ResetUsage(), SaveCachedPlan(), set_ps_display(), ShowUsage(), start_xact_command(), STATE_RUNNING, RawStmt::stmt, StorePreparedStatement(), UNKNOWNOID, and whereToSendOutput.

Referenced by PostgresMain().

1200 {
1201  MemoryContext unnamed_stmt_context = NULL;
1202  MemoryContext oldcontext;
1203  List *parsetree_list;
1204  RawStmt *raw_parse_tree;
1205  const char *commandTag;
1206  List *querytree_list;
1207  CachedPlanSource *psrc;
1208  bool is_named;
1209  bool save_log_statement_stats = log_statement_stats;
1210  char msec_str[32];
1211 
1212  /*
1213  * Report query to various monitoring facilities.
1214  */
1215  debug_query_string = query_string;
1216 
1217  pgstat_report_activity(STATE_RUNNING, query_string);
1218 
1219  set_ps_display("PARSE", false);
1220 
1221  if (save_log_statement_stats)
1222  ResetUsage();
1223 
1224  ereport(DEBUG2,
1225  (errmsg("parse %s: %s",
1226  *stmt_name ? stmt_name : "<unnamed>",
1227  query_string)));
1228 
1229  /*
1230  * Start up a transaction command so we can run parse analysis etc. (Note
1231  * that this will normally change current memory context.) Nothing happens
1232  * if we are already in one.
1233  */
1235 
1236  /*
1237  * Switch to appropriate context for constructing parsetrees.
1238  *
1239  * We have two strategies depending on whether the prepared statement is
1240  * named or not. For a named prepared statement, we do parsing in
1241  * MessageContext and copy the finished trees into the prepared
1242  * statement's plancache entry; then the reset of MessageContext releases
1243  * temporary space used by parsing and rewriting. For an unnamed prepared
1244  * statement, we assume the statement isn't going to hang around long, so
1245  * getting rid of temp space quickly is probably not worth the costs of
1246  * copying parse trees. So in this case, we create the plancache entry's
1247  * query_context here, and do all the parsing work therein.
1248  */
1249  is_named = (stmt_name[0] != '\0');
1250  if (is_named)
1251  {
1252  /* Named prepared statement --- parse in MessageContext */
1253  oldcontext = MemoryContextSwitchTo(MessageContext);
1254  }
1255  else
1256  {
1257  /* Unnamed prepared statement --- release any prior unnamed stmt */
1259  /* Create context for parsing */
1260  unnamed_stmt_context =
1262  "unnamed prepared statement",
1264  oldcontext = MemoryContextSwitchTo(unnamed_stmt_context);
1265  }
1266 
1267  /*
1268  * Do basic parsing of the query or queries (this should be safe even if
1269  * we are in aborted transaction state!)
1270  */
1271  parsetree_list = pg_parse_query(query_string);
1272 
1273  /*
1274  * We only allow a single user statement in a prepared statement. This is
1275  * mainly to keep the protocol simple --- otherwise we'd need to worry
1276  * about multiple result tupdescs and things like that.
1277  */
1278  if (list_length(parsetree_list) > 1)
1279  ereport(ERROR,
1280  (errcode(ERRCODE_SYNTAX_ERROR),
1281  errmsg("cannot insert multiple commands into a prepared statement")));
1282 
1283  if (parsetree_list != NIL)
1284  {
1285  Query *query;
1286  bool snapshot_set = false;
1287  int i;
1288 
1289  raw_parse_tree = castNode(RawStmt, linitial(parsetree_list));
1290 
1291  /*
1292  * Get the command name for possible use in status display.
1293  */
1294  commandTag = CreateCommandTag(raw_parse_tree->stmt);
1295 
1296  /*
1297  * If we are in an aborted transaction, reject all commands except
1298  * COMMIT/ROLLBACK. It is important that this test occur before we
1299  * try to do parse analysis, rewrite, or planning, since all those
1300  * phases try to do database accesses, which may fail in abort state.
1301  * (It might be safe to allow some additional utility commands in this
1302  * state, but not many...)
1303  */
1305  !IsTransactionExitStmt(raw_parse_tree->stmt))
1306  ereport(ERROR,
1307  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
1308  errmsg("current transaction is aborted, "
1309  "commands ignored until end of transaction block"),
1310  errdetail_abort()));
1311 
1312  /*
1313  * Create the CachedPlanSource before we do parse analysis, since it
1314  * needs to see the unmodified raw parse tree.
1315  */
1316  psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
1317 
1318  /*
1319  * Set up a snapshot if parse analysis will need one.
1320  */
1321  if (analyze_requires_snapshot(raw_parse_tree))
1322  {
1324  snapshot_set = true;
1325  }
1326 
1327  /*
1328  * Analyze and rewrite the query. Note that the originally specified
1329  * parameter set is not required to be complete, so we have to use
1330  * parse_analyze_varparams().
1331  */
1332  if (log_parser_stats)
1333  ResetUsage();
1334 
1335  query = parse_analyze_varparams(raw_parse_tree,
1336  query_string,
1337  &paramTypes,
1338  &numParams);
1339 
1340  /*
1341  * Check all parameter types got determined.
1342  */
1343  for (i = 0; i < numParams; i++)
1344  {
1345  Oid ptype = paramTypes[i];
1346 
1347  if (ptype == InvalidOid || ptype == UNKNOWNOID)
1348  ereport(ERROR,
1349  (errcode(ERRCODE_INDETERMINATE_DATATYPE),
1350  errmsg("could not determine data type of parameter $%d",
1351  i + 1)));
1352  }
1353 
1354  if (log_parser_stats)
1355  ShowUsage("PARSE ANALYSIS STATISTICS");
1356 
1357  querytree_list = pg_rewrite_query(query);
1358 
1359  /* Done with the snapshot used for parsing */
1360  if (snapshot_set)
1362  }
1363  else
1364  {
1365  /* Empty input string. This is legal. */
1366  raw_parse_tree = NULL;
1367  commandTag = NULL;
1368  psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
1369  querytree_list = NIL;
1370  }
1371 
1372  /*
1373  * CachedPlanSource must be a direct child of MessageContext before we
1374  * reparent unnamed_stmt_context under it, else we have a disconnected
1375  * circular subgraph. Klugy, but less so than flipping contexts even more
1376  * above.
1377  */
1378  if (unnamed_stmt_context)
1380 
1381  /* Finish filling in the CachedPlanSource */
1382  CompleteCachedPlan(psrc,
1383  querytree_list,
1384  unnamed_stmt_context,
1385  paramTypes,
1386  numParams,
1387  NULL,
1388  NULL,
1389  CURSOR_OPT_PARALLEL_OK, /* allow parallel mode */
1390  true); /* fixed result */
1391 
1392  /* If we got a cancel signal during analysis, quit */
1394 
1395  if (is_named)
1396  {
1397  /*
1398  * Store the query as a prepared statement.
1399  */
1400  StorePreparedStatement(stmt_name, psrc, false);
1401  }
1402  else
1403  {
1404  /*
1405  * We just save the CachedPlanSource into unnamed_stmt_psrc.
1406  */
1407  SaveCachedPlan(psrc);
1408  unnamed_stmt_psrc = psrc;
1409  }
1410 
1411  MemoryContextSwitchTo(oldcontext);
1412 
1413  /*
1414  * We do NOT close the open transaction command here; that only happens
1415  * when the client sends Sync. Instead, do CommandCounterIncrement just
1416  * in case something happened during parse/plan.
1417  */
1419 
1420  /*
1421  * Send ParseComplete.
1422  */
1424  pq_putemptymessage('1');
1425 
1426  /*
1427  * Emit duration logging if appropriate.
1428  */
1429  switch (check_log_duration(msec_str, false))
1430  {
1431  case 1:
1432  ereport(LOG,
1433  (errmsg("duration: %s ms", msec_str),
1434  errhidestmt(true)));
1435  break;
1436  case 2:
1437  ereport(LOG,
1438  (errmsg("duration: %s ms parse %s: %s",
1439  msec_str,
1440  *stmt_name ? stmt_name : "<unnamed>",
1441  query_string),
1442  errhidestmt(true)));
1443  break;
1444  }
1445 
1446  if (save_log_statement_stats)
1447  ShowUsage("PARSE MESSAGE STATISTICS");
1448 
1450 }
MemoryContext context
Definition: plancache.h:92
#define NIL
Definition: pg_list.h:69
bool analyze_requires_snapshot(RawStmt *parseTree)
Definition: analyze.c:345
bool log_parser_stats
Definition: guc.c:440
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
bool log_statement_stats
Definition: guc.c:443
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
void ShowUsage(const char *title)
Definition: postgres.c:4383
void MemoryContextSetParent(MemoryContext context, MemoryContext new_parent)
Definition: mcxt.c:317
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
int errcode(int sqlerrcode)
Definition: elog.c:575
int errhidestmt(bool hide_stmt)
Definition: elog.c:1068
Query * parse_analyze_varparams(RawStmt *parseTree, const char *sourceText, Oid **paramTypes, int *numParams)
Definition: analyze.c:127
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
static int errdetail_abort(void)
Definition: postgres.c:2240
void PopActiveSnapshot(void)
Definition: snapmgr.c:807
#define LOG
Definition: elog.h:26
unsigned int Oid
Definition: postgres_ext.h:31
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:300
static bool IsTransactionExitStmt(Node *parsetree)
Definition: postgres.c:2484
int check_log_duration(char *msec_str, bool was_logged)
Definition: postgres.c:2100
void ResetUsage(void)
Definition: postgres.c:4376
#define linitial(l)
Definition: pg_list.h:110
#define ERROR
Definition: elog.h:43
List * pg_parse_query(const char *query_string)
Definition: postgres.c:602
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:145
#define DEBUG2
Definition: elog.h:24
Node * stmt
Definition: parsenodes.h:1337
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:728
static CachedPlanSource * unnamed_stmt_psrc
Definition: postgres.c:156
CachedPlanSource * CreateCachedPlan(RawStmt *raw_parse_tree, const char *query_string, const char *commandTag)
Definition: plancache.c:151
#define ereport(elevel, rest)
Definition: elog.h:122
const char * CreateCommandTag(Node *parsetree)
Definition: utility.c:2012
const char * debug_query_string
Definition: postgres.c:83
static List * pg_rewrite_query(Query *query)
Definition: postgres.c:729
static void start_xact_command(void)
Definition: postgres.c:2434
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:440
void CommandCounterIncrement(void)
Definition: xact.c:921
void StorePreparedStatement(const char *stmt_name, CachedPlanSource *plansource, bool from_sql)
Definition: prepare.c:452
#define InvalidOid
Definition: postgres_ext.h:36
void SaveCachedPlan(CachedPlanSource *plansource)
Definition: plancache.c:440
#define NULL
Definition: c.h:226
void CompleteCachedPlan(CachedPlanSource *plansource, List *querytree_list, MemoryContext querytree_context, Oid *param_types, int num_params, ParserSetupHook parserSetup, void *parserSetupArg, int cursor_options, bool fixed_result)
Definition: plancache.c:324
static int list_length(const List *l)
Definition: pg_list.h:89
MemoryContext MessageContext
Definition: mcxt.c:47
#define UNKNOWNOID
Definition: pg_type.h:423
#define CURSOR_OPT_PARALLEL_OK
Definition: parsenodes.h:2528
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
static void drop_unnamed_stmt(void)
Definition: postgres.c:2531
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
CommandDest whereToSendOutput
Definition: postgres.c:86
Definition: pg_list.h:45
static void exec_simple_query ( const char *  query_string)
static

Definition at line 880 of file postgres.c.

References analyze_requires_snapshot(), BeginCommand(), castNode, CHECK_FOR_INTERRUPTS, check_log_duration(), check_log_statement(), CommandCounterIncrement(), COMPLETION_TAG_BUFSIZE, CreateCommandTag(), CreateDestReceiver(), CreatePortal(), CURSOR_OPT_BINARY, CURSOR_OPT_PARALLEL_OK, PortalData::cursorOptions, debug_query_string, DestRemote, drop_unnamed_stmt(), EndCommand(), ereport, errcode(), errdetail_abort(), errdetail_execute(), errhidestmt(), errmsg(), ERROR, FETCH_ALL, finish_xact_command(), format, GetPortalByName(), GetTransactionSnapshot(), InvalidSnapshot, IsA, IsAbortedTransactionBlockState(), FetchStmt::ismove, IsTransactionExitStmt(), lfirst, list_length(), lnext, LOG, log_statement_stats, MemoryContextSwitchTo(), MessageContext, NULL, NullCommand(), pg_analyze_and_rewrite(), pg_parse_query(), pg_plan_queries(), pgstat_report_activity(), PopActiveSnapshot(), PortalDefineQuery(), PortalDrop(), PortalIsValid, FetchStmt::portalname, PortalRun(), PortalSetResultFormat(), PortalStart(), PushActiveSnapshot(), _DestReceiver::rDestroy, ResetUsage(), set_ps_display(), SetRemoteDestReceiverParams(), ShowUsage(), start_xact_command(), STATE_RUNNING, RawStmt::stmt, PortalData::visible, and whereToSendOutput.

Referenced by PostgresMain().

881 {
883  MemoryContext oldcontext;
884  List *parsetree_list;
885  ListCell *parsetree_item;
886  bool save_log_statement_stats = log_statement_stats;
887  bool was_logged = false;
888  bool isTopLevel;
889  char msec_str[32];
890 
891 
892  /*
893  * Report query to various monitoring facilities.
894  */
895  debug_query_string = query_string;
896 
897  pgstat_report_activity(STATE_RUNNING, query_string);
898 
899  TRACE_POSTGRESQL_QUERY_START(query_string);
900 
901  /*
902  * We use save_log_statement_stats so ShowUsage doesn't report incorrect
903  * results because ResetUsage wasn't called.
904  */
905  if (save_log_statement_stats)
906  ResetUsage();
907 
908  /*
909  * Start up a transaction command. All queries generated by the
910  * query_string will be in this same command block, *unless* we find a
911  * BEGIN/COMMIT/ABORT statement; we have to force a new xact command after
912  * one of those, else bad things will happen in xact.c. (Note that this
913  * will normally change current memory context.)
914  */
916 
917  /*
918  * Zap any pre-existing unnamed statement. (While not strictly necessary,
919  * it seems best to define simple-Query mode as if it used the unnamed
920  * statement and portal; this ensures we recover any storage used by prior
921  * unnamed operations.)
922  */
924 
925  /*
926  * Switch to appropriate context for constructing parsetrees.
927  */
929 
930  /*
931  * Do basic parsing of the query or queries (this should be safe even if
932  * we are in aborted transaction state!)
933  */
934  parsetree_list = pg_parse_query(query_string);
935 
936  /* Log immediately if dictated by log_statement */
937  if (check_log_statement(parsetree_list))
938  {
939  ereport(LOG,
940  (errmsg("statement: %s", query_string),
941  errhidestmt(true),
942  errdetail_execute(parsetree_list)));
943  was_logged = true;
944  }
945 
946  /*
947  * Switch back to transaction context to enter the loop.
948  */
949  MemoryContextSwitchTo(oldcontext);
950 
951  /*
952  * We'll tell PortalRun it's a top-level command iff there's exactly one
953  * raw parsetree. If more than one, it's effectively a transaction block
954  * and we want PreventTransactionChain to reject unsafe commands. (Note:
955  * we're assuming that query rewrite cannot add commands that are
956  * significant to PreventTransactionChain.)
957  */
958  isTopLevel = (list_length(parsetree_list) == 1);
959 
960  /*
961  * Run through the raw parsetree(s) and process each one.
962  */
963  foreach(parsetree_item, parsetree_list)
964  {
965  RawStmt *parsetree = castNode(RawStmt, lfirst(parsetree_item));
966  bool snapshot_set = false;
967  const char *commandTag;
968  char completionTag[COMPLETION_TAG_BUFSIZE];
969  List *querytree_list,
970  *plantree_list;
971  Portal portal;
972  DestReceiver *receiver;
973  int16 format;
974 
975  /*
976  * Get the command name for use in status display (it also becomes the
977  * default completion tag, down inside PortalRun). Set ps_status and
978  * do any special start-of-SQL-command processing needed by the
979  * destination.
980  */
981  commandTag = CreateCommandTag(parsetree->stmt);
982 
983  set_ps_display(commandTag, false);
984 
985  BeginCommand(commandTag, dest);
986 
987  /*
988  * If we are in an aborted transaction, reject all commands except
989  * COMMIT/ABORT. It is important that this test occur before we try
990  * to do parse analysis, rewrite, or planning, since all those phases
991  * try to do database accesses, which may fail in abort state. (It
992  * might be safe to allow some additional utility commands in this
993  * state, but not many...)
994  */
996  !IsTransactionExitStmt(parsetree->stmt))
997  ereport(ERROR,
998  (errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
999  errmsg("current transaction is aborted, "
1000  "commands ignored until end of transaction block"),
1001  errdetail_abort()));
1002 
1003  /* Make sure we are in a transaction command */
1005 
1006  /* If we got a cancel signal in parsing or prior command, quit */
1008 
1009  /*
1010  * Set up a snapshot if parse analysis/planning will need one.
1011  */
1012  if (analyze_requires_snapshot(parsetree))
1013  {
1015  snapshot_set = true;
1016  }
1017 
1018  /*
1019  * OK to analyze, rewrite, and plan this query.
1020  *
1021  * Switch to appropriate context for constructing querytrees (again,
1022  * these must outlive the execution context).
1023  */
1024  oldcontext = MemoryContextSwitchTo(MessageContext);
1025 
1026  querytree_list = pg_analyze_and_rewrite(parsetree, query_string,
1027  NULL, 0);
1028 
1029  plantree_list = pg_plan_queries(querytree_list,
1031 
1032  /* Done with the snapshot used for parsing/planning */
1033  if (snapshot_set)
1035 
1036  /* If we got a cancel signal in analysis or planning, quit */
1038 
1039  /*
1040  * Create unnamed portal to run the query or queries in. If there
1041  * already is one, silently drop it.
1042  */
1043  portal = CreatePortal("", true, true);
1044  /* Don't display the portal in pg_cursors */
1045  portal->visible = false;
1046 
1047  /*
1048  * We don't have to copy anything into the portal, because everything
1049  * we are passing here is in MessageContext, which will outlive the
1050  * portal anyway.
1051  */
1052  PortalDefineQuery(portal,
1053  NULL,
1054  query_string,
1055  commandTag,
1056  plantree_list,
1057  NULL);
1058 
1059  /*
1060  * Start the portal. No parameters here.
1061  */
1062  PortalStart(portal, NULL, 0, InvalidSnapshot);
1063 
1064  /*
1065  * Select the appropriate output format: text unless we are doing a
1066  * FETCH from a binary cursor. (Pretty grotty to have to do this here
1067  * --- but it avoids grottiness in other places. Ah, the joys of
1068  * backward compatibility...)
1069  */
1070  format = 0; /* TEXT is default */
1071  if (IsA(parsetree->stmt, FetchStmt))
1072  {
1073  FetchStmt *stmt = (FetchStmt *) parsetree->stmt;
1074 
1075  if (!stmt->ismove)
1076  {
1077  Portal fportal = GetPortalByName(stmt->portalname);
1078 
1079  if (PortalIsValid(fportal) &&
1080  (fportal->cursorOptions & CURSOR_OPT_BINARY))
1081  format = 1; /* BINARY */
1082  }
1083  }
1084  PortalSetResultFormat(portal, 1, &format);
1085 
1086  /*
1087  * Now we can create the destination receiver object.
1088  */
1089  receiver = CreateDestReceiver(dest);
1090  if (dest == DestRemote)
1091  SetRemoteDestReceiverParams(receiver, portal);
1092 
1093  /*
1094  * Switch back to transaction context for execution.
1095  */
1096  MemoryContextSwitchTo(oldcontext);
1097 
1098  /*
1099  * Run the portal to completion, and then drop it (and the receiver).
1100  */
1101  (void) PortalRun(portal,
1102  FETCH_ALL,
1103  isTopLevel,
1104  receiver,
1105  receiver,
1106  completionTag);
1107 
1108  (*receiver->rDestroy) (receiver);
1109 
1110  PortalDrop(portal, false);
1111 
1112  if (IsA(parsetree->stmt, TransactionStmt))
1113  {
1114  /*
1115  * If this was a transaction control statement, commit it. We will
1116  * start a new xact command for the next command (if any).
1117  */
1119  }
1120  else if (lnext(parsetree_item) == NULL)
1121  {
1122  /*
1123  * If this is the last parsetree of the query string, close down
1124  * transaction statement before reporting command-complete. This
1125  * is so that any end-of-transaction errors are reported before
1126  * the command-complete message is issued, to avoid confusing
1127  * clients who will expect either a command-complete message or an
1128  * error, not one and then the other. But for compatibility with
1129  * historical Postgres behavior, we do not force a transaction
1130  * boundary between queries appearing in a single query string.
1131  */
1133  }
1134  else
1135  {
1136  /*
1137  * We need a CommandCounterIncrement after every query, except
1138  * those that start or end a transaction block.
1139  */
1141  }
1142 
1143  /*
1144  * Tell client that we're done with this query. Note we emit exactly
1145  * one EndCommand report for each raw parsetree, thus one for each SQL
1146  * command the client sent, regardless of rewriting. (But a command
1147  * aborted by error will not send an EndCommand report at all.)
1148  */
1149  EndCommand(completionTag, dest);
1150  } /* end loop over parsetrees */
1151 
1152  /*
1153  * Close down transaction statement, if one is open.
1154  */
1156 
1157  /*
1158  * If there were no parsetrees, return EmptyQueryResponse message.
1159  */
1160  if (!parsetree_list)
1161  NullCommand(dest);
1162 
1163  /*
1164  * Emit duration logging if appropriate.
1165  */
1166  switch (check_log_duration(msec_str, was_logged))
1167  {
1168  case 1:
1169  ereport(LOG,
1170  (errmsg("duration: %s ms", msec_str),
1171  errhidestmt(true)));
1172  break;
1173  case 2:
1174  ereport(LOG,
1175  (errmsg("duration: %s ms statement: %s",
1176  msec_str, query_string),
1177  errhidestmt(true),
1178  errdetail_execute(parsetree_list)));
1179  break;
1180  }
1181 
1182  if (save_log_statement_stats)
1183  ShowUsage("QUERY STATISTICS");
1184 
1185  TRACE_POSTGRESQL_QUERY_DONE(query_string);
1186 
1188 }
signed short int16
Definition: c.h:252
void SetRemoteDestReceiverParams(DestReceiver *self, Portal portal)
Definition: printtup.c:101
Portal CreatePortal(const char *name, bool allowDup, bool dupSilent)
Definition: portalmem.c:174
void(* rDestroy)(DestReceiver *self)
Definition: dest.h:126
#define IsA(nodeptr, _type_)
Definition: nodes.h:559
void PortalSetResultFormat(Portal portal, int nFormats, int16 *formats)
Definition: pquery.c:620
bool analyze_requires_snapshot(RawStmt *parseTree)
Definition: analyze.c:345
void PortalStart(Portal portal, ParamListInfo params, int eflags, Snapshot snapshot)
Definition: pquery.c:439
static void finish_xact_command(void)
Definition: postgres.c:2452
bool visible
Definition: portal.h:190
CommandDest
Definition: dest.h:86
void PortalDefineQuery(Portal portal, const char *prepStmtName, const char *sourceText, const char *commandTag, List *stmts, CachedPlan *cplan)
Definition: portalmem.c:277
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
bool log_statement_stats
Definition: guc.c:443
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
void ShowUsage(const char *title)
Definition: postgres.c:4383
Portal GetPortalByName(const char *name)
Definition: portalmem.c:129
#define CURSOR_OPT_BINARY
Definition: parsenodes.h:2519
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
int errcode(int sqlerrcode)
Definition: elog.c:575
int errhidestmt(bool hide_stmt)
Definition: elog.c:1068
static int errdetail_abort(void)
Definition: postgres.c:2240
void PopActiveSnapshot(void)
Definition: snapmgr.c:807
void BeginCommand(const char *commandTag, CommandDest dest)
Definition: dest.c:99
#define LOG
Definition: elog.h:26
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:300
static bool IsTransactionExitStmt(Node *parsetree)
Definition: postgres.c:2484
int check_log_duration(char *msec_str, bool was_logged)
Definition: postgres.c:2100
List * pg_analyze_and_rewrite(RawStmt *parsetree, const char *query_string, Oid *paramTypes, int numParams)
Definition: postgres.c:644
static int errdetail_execute(List *raw_parsetree_list)
Definition: postgres.c:2145
void ResetUsage(void)
Definition: postgres.c:4376
void EndCommand(const char *commandTag, CommandDest dest)
Definition: dest.c:157
#define ERROR
Definition: elog.h:43
List * pg_parse_query(const char *query_string)
Definition: postgres.c:602
Node * stmt
Definition: parsenodes.h:1337
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:728
DestReceiver * CreateDestReceiver(CommandDest dest)
Definition: dest.c:109
char * portalname
Definition: parsenodes.h:2570
#define lnext(lc)
Definition: pg_list.h:105
#define ereport(elevel, rest)
Definition: elog.h:122
const char * CreateCommandTag(Node *parsetree)
Definition: utility.c:2012
const char * debug_query_string
Definition: postgres.c:83
#define InvalidSnapshot
Definition: snapshot.h:25
static bool check_log_statement(List *stmt_list)
Definition: postgres.c:2063
#define PortalIsValid(p)
Definition: portal.h:197
static void start_xact_command(void)
Definition: postgres.c:2434
bool ismove
Definition: parsenodes.h:2571
void CommandCounterIncrement(void)
Definition: xact.c:921
#define COMPLETION_TAG_BUFSIZE
Definition: dest.h:74
#define NULL
Definition: c.h:226
bool PortalRun(Portal portal, long count, bool isTopLevel, DestReceiver *dest, DestReceiver *altdest, char *completionTag)
Definition: pquery.c:682
#define lfirst(lc)
Definition: pg_list.h:106
static int list_length(const List *l)
Definition: pg_list.h:89
MemoryContext MessageContext
Definition: mcxt.c:47
#define CURSOR_OPT_PARALLEL_OK
Definition: parsenodes.h:2528
int errmsg(const char *fmt,...)
Definition: elog.c:797
void PortalDrop(Portal portal, bool isTopCommit)
Definition: portalmem.c:461
static void drop_unnamed_stmt(void)
Definition: postgres.c:2531
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
static char format
Definition: pg_basebackup.c:83
int cursorOptions
Definition: portal.h:143
CommandDest whereToSendOutput
Definition: postgres.c:86
Definition: pg_list.h:45
List * pg_plan_queries(List *querytrees, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:842
void NullCommand(CommandDest dest)
Definition: dest.c:198
#define FETCH_ALL
Definition: parsenodes.h:2563
static void finish_xact_command ( void  )
static

Definition at line 2452 of file postgres.c.

References CommitTransactionCommand(), disable_timeout(), MemoryContextStats(), STATEMENT_TIMEOUT, TopMemoryContext, and xact_started.

Referenced by exec_execute_message(), exec_simple_query(), and PostgresMain().

2453 {
2454  if (xact_started)
2455  {
2456  /* Cancel any active statement timeout before committing */
2458 
2460 
2461 #ifdef MEMORY_CONTEXT_CHECKING
2462  /* Check all memory contexts that weren't freed during commit */
2463  /* (those that were, were checked before being deleted) */
2464  MemoryContextCheck(TopMemoryContext);
2465 #endif
2466 
2467 #ifdef SHOW_MEMORY_STATS
2468  /* Print mem stats after each commit for leak tracking */
2470 #endif
2471 
2472  xact_started = false;
2473  }
2474 }
void CommitTransactionCommand(void)
Definition: xact.c:2745
void MemoryContextStats(MemoryContext context)
Definition: mcxt.c:483
static bool xact_started
Definition: postgres.c:135
MemoryContext TopMemoryContext
Definition: mcxt.c:43
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:525
void FloatExceptionHandler ( SIGNAL_ARGS  )

Definition at line 2669 of file postgres.c.

References ereport, errcode(), errdetail(), errmsg(), and ERROR.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), plperl_init_interp(), PostgresMain(), and StartBackgroundWorker().

2670 {
2671  /* We're not returning, so no need to save errno */
2672  ereport(ERROR,
2673  (errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
2674  errmsg("floating-point exception"),
2675  errdetail("An invalid floating-point operation was signaled. "
2676  "This probably means an out-of-range result or an "
2677  "invalid operation, such as division by zero.")));
2678 }
int errcode(int sqlerrcode)
Definition: elog.c:575
#define ERROR
Definition: elog.h:43
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define ereport(elevel, rest)
Definition: elog.h:122
int errmsg(const char *fmt,...)
Definition: elog.c:797
static void forbidden_in_wal_sender ( char  firstchar)
static

Definition at line 4318 of file postgres.c.

References am_walsender, ereport, errcode(), errmsg(), and ERROR.

Referenced by PostgresMain().

4319 {
4320  if (am_walsender)
4321  {
4322  if (firstchar == 'F')
4323  ereport(ERROR,
4324  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4325  errmsg("fastpath function calls not supported in a replication connection")));
4326  else
4327  ereport(ERROR,
4328  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4329  errmsg("extended query protocol not supported in a replication connection")));
4330  }
4331 }
int errcode(int sqlerrcode)
Definition: elog.c:575
bool am_walsender
Definition: walsender.c:106
#define ERROR
Definition: elog.h:43
#define ereport(elevel, rest)
Definition: elog.h:122
int errmsg(const char *fmt,...)
Definition: elog.c:797
long get_stack_depth_rlimit ( void  )

Definition at line 4340 of file postgres.c.

References val.

Referenced by check_max_stack_depth(), and InitializeGUCOptionsFromEnvironment().

4341 {
4342 #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_STACK)
4343  static long val = 0;
4344 
4345  /* This won't change after process launch, so check just once */
4346  if (val == 0)
4347  {
4348  struct rlimit rlim;
4349 
4350  if (getrlimit(RLIMIT_STACK, &rlim) < 0)
4351  val = -1;
4352  else if (rlim.rlim_cur == RLIM_INFINITY)
4353  val = LONG_MAX;
4354  /* rlim_cur is probably of an unsigned type, so check for overflow */
4355  else if (rlim.rlim_cur >= LONG_MAX)
4356  val = LONG_MAX;
4357  else
4358  val = rlim.rlim_cur;
4359  }
4360  return val;
4361 #else /* no getrlimit */
4362 #if defined(WIN32) || defined(__CYGWIN__)
4363  /* On Windows we set the backend stack size in src/backend/Makefile */
4364  return WIN32_STACK_RLIMIT;
4365 #else /* not windows ... give up */
4366  return -1;
4367 #endif
4368 #endif
4369 }
long val
Definition: informix.c:689
const char* get_stats_option_name ( const char *  arg)

Definition at line 3262 of file postgres.c.

References NULL, and optarg.

Referenced by PostmasterMain(), and process_postgres_switches().

3263 {
3264  switch (arg[0])
3265  {
3266  case 'p':
3267  if (optarg[1] == 'a') /* "parser" */
3268  return "log_parser_stats";
3269  else if (optarg[1] == 'l') /* "planner" */
3270  return "log_planner_stats";
3271  break;
3272 
3273  case 'e': /* "executor" */
3274  return "log_executor_stats";
3275  break;
3276  }
3277 
3278  return NULL;
3279 }
#define NULL
Definition: c.h:226
char * optarg
Definition: getopt.c:53
void * arg
static int interactive_getc ( void  )
static

Definition at line 297 of file postgres.c.

References CHECK_FOR_INTERRUPTS, and ProcessClientReadInterrupt().

Referenced by InteractiveBackend().

298 {
299  int c;
300 
301  /*
302  * This will not process catchup interrupts or notifications while
303  * reading. But those can't really be relevant for a standalone backend
304  * anyway. To properly handle SIGTERM there's a hack in die() that
305  * directly processes interrupts at this stage...
306  */
308 
309  c = getc(stdin);
310 
312 
313  return c;
314 }
char * c
void ProcessClientReadInterrupt(bool blocked)
Definition: postgres.c:522
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
static int InteractiveBackend ( StringInfo  inBuf)
static

Definition at line 209 of file postgres.c.

References appendStringInfoChar(), StringInfoData::data, EchoQuery, interactive_getc(), StringInfoData::len, resetStringInfo(), and UseSemiNewlineNewline.

Referenced by ReadCommand().

210 {
211  int c; /* character read from getc() */
212 
213  /*
214  * display a prompt and obtain input from the user
215  */
216  printf("backend> ");
217  fflush(stdout);
218 
219  resetStringInfo(inBuf);
220 
221  /*
222  * Read characters until EOF or the appropriate delimiter is seen.
223  */
224  while ((c = interactive_getc()) != EOF)
225  {
226  if (c == '\n')
227  {
229  {
230  /*
231  * In -j mode, semicolon followed by two newlines ends the
232  * command; otherwise treat newline as regular character.
233  */
234  if (inBuf->len > 1 &&
235  inBuf->data[inBuf->len - 1] == '\n' &&
236  inBuf->data[inBuf->len - 2] == ';')
237  {
238  /* might as well drop the second newline */
239  break;
240  }
241  }
242  else
243  {
244  /*
245  * In plain mode, newline ends the command unless preceded by
246  * backslash.
247  */
248  if (inBuf->len > 0 &&
249  inBuf->data[inBuf->len - 1] == '\\')
250  {
251  /* discard backslash from inBuf */
252  inBuf->data[--inBuf->len] = '\0';
253  /* discard newline too */
254  continue;
255  }
256  else
257  {
258  /* keep the newline character, but end the command */
259  appendStringInfoChar(inBuf, '\n');
260  break;
261  }
262  }
263  }
264 
265  /* Not newline, or newline treated as regular character */
266  appendStringInfoChar(inBuf, (char) c);
267  }
268 
269  /* No input before EOF signal means time to quit. */
270  if (c == EOF && inBuf->len == 0)
271  return EOF;
272 
273  /*
274  * otherwise we have a user query so process it.
275  */
276 
277  /* Add '\0' to make it look the same as message case. */
278  appendStringInfoChar(inBuf, (char) '\0');
279 
280  /*
281  * if the query echo flag was given, print the query..
282  */
283  if (EchoQuery)
284  printf("statement: %s\n", inBuf->data);
285  fflush(stdout);
286 
287  return 'Q';
288 }
static int interactive_getc(void)
Definition: postgres.c:297
char * c
void resetStringInfo(StringInfo str)
Definition: stringinfo.c:94
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:201
static bool EchoQuery
Definition: postgres.c:160
static bool UseSemiNewlineNewline
Definition: postgres.c:161
static bool IsTransactionExitStmt ( Node parsetree)
static

Definition at line 2484 of file postgres.c.

References IsA, TransactionStmt::kind, TRANS_STMT_COMMIT, TRANS_STMT_PREPARE, TRANS_STMT_ROLLBACK, and TRANS_STMT_ROLLBACK_TO.

Referenced by exec_bind_message(), exec_parse_message(), exec_simple_query(), and IsTransactionExitStmtList().

2485 {
2486  if (parsetree && IsA(parsetree, TransactionStmt))
2487  {
2488  TransactionStmt *stmt = (TransactionStmt *) parsetree;
2489 
2490  if (stmt->kind == TRANS_STMT_COMMIT ||
2491  stmt->kind == TRANS_STMT_PREPARE ||
2492  stmt->kind == TRANS_STMT_ROLLBACK ||
2493  stmt->kind == TRANS_STMT_ROLLBACK_TO)
2494  return true;
2495  }
2496  return false;
2497 }
#define IsA(nodeptr, _type_)
Definition: nodes.h:559
TransactionStmtKind kind
Definition: parsenodes.h:2814
static bool IsTransactionExitStmtList ( List pstmts)
static

Definition at line 2501 of file postgres.c.

References castNode, CMD_UTILITY, PlannedStmt::commandType, IsTransactionExitStmt(), linitial, list_length(), and PlannedStmt::utilityStmt.

Referenced by exec_execute_message().

2502 {
2503  if (list_length(pstmts) == 1)
2504  {
2505  PlannedStmt *pstmt = castNode(PlannedStmt, linitial(pstmts));
2506 
2507  if (pstmt->commandType == CMD_UTILITY &&
2509  return true;
2510  }
2511  return false;
2512 }
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
static bool IsTransactionExitStmt(Node *parsetree)
Definition: postgres.c:2484
#define linitial(l)
Definition: pg_list.h:110
Node * utilityStmt
Definition: plannodes.h:80
CmdType commandType
Definition: plannodes.h:45
static int list_length(const List *l)
Definition: pg_list.h:89
static bool IsTransactionStmtList ( List pstmts)
static

Definition at line 2516 of file postgres.c.

References castNode, CMD_UTILITY, PlannedStmt::commandType, IsA, linitial, list_length(), and PlannedStmt::utilityStmt.

Referenced by exec_execute_message().

2517 {
2518  if (list_length(pstmts) == 1)
2519  {
2520  PlannedStmt *pstmt = castNode(PlannedStmt, linitial(pstmts));
2521 
2522  if (pstmt->commandType == CMD_UTILITY &&
2523  IsA(pstmt->utilityStmt, TransactionStmt))
2524  return true;
2525  }
2526  return false;
2527 }
#define IsA(nodeptr, _type_)
Definition: nodes.h:559
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
#define linitial(l)
Definition: pg_list.h:110
Node * utilityStmt
Definition: plannodes.h:80
CmdType commandType
Definition: plannodes.h:45
static int list_length(const List *l)
Definition: pg_list.h:89
static void log_disconnections ( int  code,
Datum  arg 
)
static

Definition at line 4478 of file postgres.c.

References Port::database_name, ereport, errmsg(), GetCurrentTimestamp(), LOG, MyProcPort, port, Port::remote_host, Port::remote_port, SECS_PER_HOUR, SECS_PER_MINUTE, Port::SessionStartTime, TimestampDifference(), and Port::user_name.

Referenced by PostgresMain().

4479 {
4480  Port *port = MyProcPort;
4481  long secs;
4482  int usecs;
4483  int msecs;
4484  int hours,
4485  minutes,
4486  seconds;
4487 
4490  &secs, &usecs);
4491  msecs = usecs / 1000;
4492 
4493  hours = secs / SECS_PER_HOUR;
4494  secs %= SECS_PER_HOUR;
4495  minutes = secs / SECS_PER_MINUTE;
4496  seconds = secs % SECS_PER_MINUTE;
4497 
4498  ereport(LOG,
4499  (errmsg("disconnection: session time: %d:%02d:%02d.%03d "
4500  "user=%s database=%s host=%s%s%s",
4501  hours, minutes, seconds, msecs,
4502  port->user_name, port->database_name, port->remote_host,
4503  port->remote_port[0] ? " port=" : "", port->remote_port)));
4504 }
struct Port * MyProcPort
Definition: globals.c:40
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1569
Definition: libpq-be.h:118
char * remote_port
Definition: libpq-be.h:130
#define LOG
Definition: elog.h:26
TimestampTz SessionStartTime
Definition: libpq-be.h:153
#define SECS_PER_MINUTE
Definition: timestamp.h:88
char * user_name
Definition: libpq-be.h:139
#define ereport(elevel, rest)
Definition: elog.h:122
#define SECS_PER_HOUR
Definition: timestamp.h:87
static int port
Definition: pg_regress.c:87
char * remote_host
Definition: libpq-be.h:125
int errmsg(const char *fmt,...)
Definition: elog.c:797
void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: timestamp.c:1623
char * database_name
Definition: libpq-be.h:138
List* pg_analyze_and_rewrite ( RawStmt parsetree,
const char *  query_string,
Oid paramTypes,
int  numParams 
)

Definition at line 644 of file postgres.c.

References log_parser_stats, parse_analyze(), pg_rewrite_query(), ResetUsage(), and ShowUsage().

Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), BeginCopy(), exec_simple_query(), execute_sql_string(), and RevalidateCachedQuery().

646 {
647  Query *query;
648  List *querytree_list;
649 
650  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
651 
652  /*
653  * (1) Perform parse analysis.
654  */
655  if (log_parser_stats)
656  ResetUsage();
657 
658  query = parse_analyze(parsetree, query_string, paramTypes, numParams);
659 
660  if (log_parser_stats)
661  ShowUsage("PARSE ANALYSIS STATISTICS");
662 
663  /*
664  * (2) Rewrite the queries, as necessary
665  */
666  querytree_list = pg_rewrite_query(query);
667 
668  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
669 
670  return querytree_list;
671 }
bool log_parser_stats
Definition: guc.c:440
void ShowUsage(const char *title)
Definition: postgres.c:4383
Query * parse_analyze(RawStmt *parseTree, const char *sourceText, Oid *paramTypes, int numParams)
Definition: analyze.c:96
void ResetUsage(void)
Definition: postgres.c:4376
static List * pg_rewrite_query(Query *query)
Definition: postgres.c:729
Definition: pg_list.h:45
List* pg_analyze_and_rewrite_params ( RawStmt parsetree,
const char *  query_string,
ParserSetupHook  parserSetup,
void *  parserSetupArg 
)

Definition at line 679 of file postgres.c.

References Assert, free_parsestate(), log_parser_stats, make_parsestate(), NULL, ParseState::p_sourcetext, pg_rewrite_query(), post_parse_analyze_hook, ResetUsage(), ShowUsage(), and transformTopLevelStmt().

Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), fmgr_sql_validator(), init_sql_fcache(), inline_set_returning_function(), and RevalidateCachedQuery().

683 {
684  ParseState *pstate;
685  Query *query;
686  List *querytree_list;
687 
688  Assert(query_string != NULL); /* required as of 8.4 */
689 
690  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
691 
692  /*
693  * (1) Perform parse analysis.
694  */
695  if (log_parser_stats)
696  ResetUsage();
697 
698  pstate = make_parsestate(NULL);
699  pstate->p_sourcetext = query_string;
700  (*parserSetup) (pstate, parserSetupArg);
701 
702  query = transformTopLevelStmt(pstate, parsetree);
703 
705  (*post_parse_analyze_hook) (pstate, query);
706 
707  free_parsestate(pstate);
708 
709  if (log_parser_stats)
710  ShowUsage("PARSE ANALYSIS STATISTICS");
711 
712  /*
713  * (2) Rewrite the queries, as necessary
714  */
715  querytree_list = pg_rewrite_query(query);
716 
717  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
718 
719  return querytree_list;
720 }
bool log_parser_stats
Definition: guc.c:440
void ShowUsage(const char *title)
Definition: postgres.c:4383
ParseState * make_parsestate(ParseState *parentParseState)
Definition: parse_node.c:44
void ResetUsage(void)
Definition: postgres.c:4376
const char * p_sourcetext
Definition: parse_node.h:167
static List * pg_rewrite_query(Query *query)
Definition: postgres.c:729
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
Query * transformTopLevelStmt(ParseState *pstate, RawStmt *parseTree)
Definition: analyze.c:184
void free_parsestate(ParseState *pstate)
Definition: parse_node.c:75
Definition: pg_list.h:45
post_parse_analyze_hook_type post_parse_analyze_hook
Definition: analyze.c:49
List* pg_parse_query ( const char *  query_string)

Definition at line 602 of file postgres.c.

References copyObject(), elog, equal(), log_parser_stats, new_list(), raw_parser(), ResetUsage(), ShowUsage(), and WARNING.

Referenced by _SPI_prepare_oneshot_plan(), _SPI_prepare_plan(), exec_parse_message(), exec_simple_query(), execute_sql_string(), fmgr_sql_validator(), ImportForeignSchema(), init_sql_fcache(), inline_function(), and inline_set_returning_function().

603 {
604  List *raw_parsetree_list;
605 
606  TRACE_POSTGRESQL_QUERY_PARSE_START(query_string);
607 
608  if (log_parser_stats)
609  ResetUsage();
610 
611  raw_parsetree_list = raw_parser(query_string);
612 
613  if (log_parser_stats)
614  ShowUsage("PARSER STATISTICS");
615 
616 #ifdef COPY_PARSE_PLAN_TREES
617  /* Optional debugging check: pass raw parsetrees through copyObject() */
618  {
619  List *new_list = (List *) copyObject(raw_parsetree_list);
620 
621  /* This checks both copyObject() and the equal() routines... */
622  if (!equal(new_list, raw_parsetree_list))
623  elog(WARNING, "copyObject() failed to produce an equal raw parse tree");
624  else
625  raw_parsetree_list = new_list;
626  }
627 #endif
628 
629  TRACE_POSTGRESQL_QUERY_PARSE_DONE(query_string);
630 
631  return raw_parsetree_list;
632 }
List * raw_parser(const char *str)
Definition: parser.c:36
bool log_parser_stats
Definition: guc.c:440
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2870
void ShowUsage(const char *title)
Definition: postgres.c:4383
static List * new_list(NodeTag type)
Definition: list.c:63
void * copyObject(const void *from)
Definition: copyfuncs.c:4475
void ResetUsage(void)
Definition: postgres.c:4376
#define WARNING
Definition: elog.h:40
#define elog
Definition: elog.h:219
Definition: pg_list.h:45
List* pg_plan_queries ( List querytrees,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 842 of file postgres.c.

References PlannedStmt::canSetTag, Query::canSetTag, castNode, CMD_UTILITY, PlannedStmt::commandType, Query::commandType, lappend(), lfirst, makeNode, NIL, pg_plan_query(), PlannedStmt::stmt_len, Query::stmt_len, PlannedStmt::stmt_location, Query::stmt_location, PlannedStmt::utilityStmt, and Query::utilityStmt.

Referenced by BuildCachedPlan(), exec_simple_query(), and execute_sql_string().

843 {
844  List *stmt_list = NIL;
845  ListCell *query_list;
846 
847  foreach(query_list, querytrees)
848  {
849  Query *query = castNode(Query, lfirst(query_list));
850  PlannedStmt *stmt;
851 
852  if (query->commandType == CMD_UTILITY)
853  {
854  /* Utility commands require no planning. */
855  stmt = makeNode(PlannedStmt);
856  stmt->commandType = CMD_UTILITY;
857  stmt->canSetTag = query->canSetTag;
858  stmt->utilityStmt = query->utilityStmt;
859  stmt->stmt_location = query->stmt_location;
860  stmt->stmt_len = query->stmt_len;
861  }
862  else
863  {
864  stmt = pg_plan_query(query, cursorOptions, boundParams);
865  }
866 
867  stmt_list = lappend(stmt_list, stmt);
868  }
869 
870  return stmt_list;
871 }
#define NIL
Definition: pg_list.h:69
int stmt_location
Definition: parsenodes.h:171
#define castNode(_type_, nodeptr)
Definition: nodes.h:577
Node * utilityStmt
Definition: parsenodes.h:111
int stmt_len
Definition: plannodes.h:84
int stmt_location
Definition: plannodes.h:83
Node * utilityStmt
Definition: plannodes.h:80
List * lappend(List *list, void *datum)
Definition: list.c:128
bool canSetTag
Definition: plannodes.h:53
CmdType commandType
Definition: plannodes.h:45
CmdType commandType
Definition: parsenodes.h:103
#define makeNode(_type_)
Definition: nodes.h:556
#define lfirst(lc)
Definition: pg_list.h:106
bool canSetTag
Definition: parsenodes.h:109
Definition: pg_list.h:45
int stmt_len
Definition: parsenodes.h:172
PlannedStmt * pg_plan_query(Query *querytree, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:781
PlannedStmt* pg_plan_query ( Query querytree,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 781 of file postgres.c.

References ActiveSnapshotSet(), Assert, CMD_UTILITY, Query::commandType, copyObject(), Debug_pretty_print, Debug_print_plan, elog, elog_node_display(), equal(), LOG, log_planner_stats, NULL, planner(), ResetUsage(), ShowUsage(), and WARNING.

Referenced by BeginCopy(), ExecCreateTableAs(), ExplainOneQuery(), init_execution_state(), PerformCursorOpen(), pg_plan_queries(), and refresh_matview_datafill().

782 {
783  PlannedStmt *plan;
784 
785  /* Utility commands have no plans. */
786  if (querytree->commandType == CMD_UTILITY)
787  return NULL;
788 
789  /* Planner must have a snapshot in case it calls user-defined functions. */
791 
792  TRACE_POSTGRESQL_QUERY_PLAN_START();
793 
794  if (log_planner_stats)
795  ResetUsage();
796 
797  /* call the optimizer */
798  plan = planner(querytree, cursorOptions, boundParams);
799 
800  if (log_planner_stats)
801  ShowUsage("PLANNER STATISTICS");
802 
803 #ifdef COPY_PARSE_PLAN_TREES
804  /* Optional debugging check: pass plan output through copyObject() */
805  {
806  PlannedStmt *new_plan = (PlannedStmt *) copyObject(plan);
807 
808  /*
809  * equal() currently does not have routines to compare Plan nodes, so
810  * don't try to test equality here. Perhaps fix someday?
811  */
812 #ifdef NOT_USED
813  /* This checks both copyObject() and the equal() routines... */
814  if (!equal(new_plan, plan))
815  elog(WARNING, "copyObject() failed to produce an equal plan tree");
816  else
817 #endif
818  plan = new_plan;
819  }
820 #endif
821 
822  /*
823  * Print plan if debugging.
824  */
825  if (Debug_print_plan)
826  elog_node_display(LOG, "plan", plan, Debug_pretty_print);
827 
828  TRACE_POSTGRESQL_QUERY_PLAN_DONE();
829 
830  return plan;
831 }
void elog_node_display(int lev, const char *title, const void *obj, bool pretty)
Definition: print.c:71
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2870
void ShowUsage(const char *title)
Definition: postgres.c:4383
#define LOG
Definition: elog.h:26
PlannedStmt * planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
Definition: planner.c:174
void * copyObject(const void *from)
Definition: copyfuncs.c:4475
void ResetUsage(void)
Definition: postgres.c:4376
bool Debug_print_plan
Definition: guc.c:435
bool ActiveSnapshotSet(void)
Definition: snapmgr.c:846
#define WARNING
Definition: elog.h:40
CmdType commandType
Definition: parsenodes.h:103
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
bool Debug_pretty_print
Definition: guc.c:438
#define elog
Definition: elog.h:219
bool log_planner_stats
Definition: guc.c:441
static List * pg_rewrite_query ( Query query)
static

Definition at line 729 of file postgres.c.

References CMD_UTILITY, Query::commandType, copyObject(), Debug_pretty_print, Debug_print_parse, Debug_print_rewritten, elog, elog_node_display(), equal(), list_make1, LOG, log_parser_stats, new_list(), QueryRewrite(), ResetUsage(), ShowUsage(), and WARNING.

Referenced by exec_parse_message(), pg_analyze_and_rewrite(), and pg_analyze_and_rewrite_params().

730 {
731  List *querytree_list;
732 
733  if (Debug_print_parse)
734  elog_node_display(LOG, "parse tree", query,
736 
737  if (log_parser_stats)
738  ResetUsage();
739 
740  if (query->commandType == CMD_UTILITY)
741  {
742  /* don't rewrite utilities, just dump 'em into result list */
743  querytree_list = list_make1(query);
744  }
745  else
746  {
747  /* rewrite regular queries */
748  querytree_list = QueryRewrite(query);
749  }
750 
751  if (log_parser_stats)
752  ShowUsage("REWRITER STATISTICS");
753 
754 #ifdef COPY_PARSE_PLAN_TREES
755  /* Optional debugging check: pass querytree output through copyObject() */
756  {
757  List *new_list;
758 
759  new_list = (List *) copyObject(querytree_list);
760  /* This checks both copyObject() and the equal() routines... */
761  if (!equal(new_list, querytree_list))
762  elog(WARNING, "copyObject() failed to produce equal parse tree");
763  else
764  querytree_list = new_list;
765  }
766 #endif
767 
769  elog_node_display(LOG, "rewritten parse tree", querytree_list,
771 
772  return querytree_list;
773 }
List * QueryRewrite(Query *parsetree)
void elog_node_display(int lev, const char *title, const void *obj, bool pretty)
Definition: print.c:71
bool log_parser_stats
Definition: guc.c:440
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2870
void ShowUsage(const char *title)
Definition: postgres.c:4383
static List * new_list(NodeTag type)
Definition: list.c:63
#define LOG
Definition: elog.h:26
void * copyObject(const void *from)
Definition: copyfuncs.c:4475
#define list_make1(x1)
Definition: pg_list.h:133
void ResetUsage(void)
Definition: postgres.c:4376
bool Debug_print_parse
Definition: guc.c:436
#define WARNING
Definition: elog.h:40
CmdType commandType
Definition: parsenodes.h:103
bool Debug_pretty_print
Definition: guc.c:438
bool Debug_print_rewritten
Definition: guc.c:437
#define elog
Definition: elog.h:219
Definition: pg_list.h:45
void PostgresMain ( int  argc,
char *  argv[],
const char *  dbname,
const char *  username 
)

Definition at line 3561 of file postgres.c.

References AbortCurrentTransaction(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate(), am_walsender, Assert, BaseInit(), BeginReportingGUCOptions(), BlockSig, buf, ChangeToDataDir(), CHECK_FOR_INTERRUPTS, CreateDataDirLockFile(), DataDir, debug_query_string, DestDebug, DestNone, DestRemote, die(), disable_all_timeouts(), disable_timeout(), doing_extended_query_message, DoingCommandRead, drop_unnamed_stmt(), DropPreparedStatement(), EmitErrorReport(), enable_timeout_after(), ereport, errcode(), errmsg(), ERROR, error_context_stack, exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_replication_command(), exec_simple_query(), FATAL, finish_xact_command(), FloatExceptionHandler(), FlushErrorState(), forbidden_in_wal_sender(), GetCurrentTimestamp(), GetPortalByName(), got_SIGHUP, HandleFunctionRequest(), HOLD_INTERRUPTS, i, IDLE_IN_TRANSACTION_SESSION_TIMEOUT, IdleInTransactionSessionTimeout, ignore_till_sync, InitializeGUCOptions(), InitializeMaxBackends(), InitializeTimeouts(), InitPostgres(), InitProcess(), InitProcessing, InitStandaloneProcess(), initStringInfo(), InitWalSender(), InvalidateCatalogSnapshotConditionally(), InvalidOid, IsAbortedTransactionBlockState(), IsTransactionOrTransactionBlock(), IsUnderPostmaster, Log_disconnections, log_disconnections(), MemoryContextDelete(), MemoryContextResetAndDeleteChildren, MemoryContextSwitchTo(), MessageContext, MyCancelKey, MyProcPid, MyReplicationSlot, NormalProcessing, NULL, on_proc_exit(), palloc(), PG_exception_stack, PG_SETMASK, PGC_POSTMASTER, PGC_SIGHUP, PgStartTime, pgstat_report_activity(), pgstat_report_stat(), PortalDrop(), PortalIsValid, PostmasterContext, pq_beginmessage(), pq_comm_reset, pq_endmessage(), pq_flush, pq_getmsgbyte(), pq_getmsgend(), pq_getmsgint(), pq_getmsgstring(), pq_is_reading_msg(), pq_putemptymessage(), pq_sendint(), pqinitmask(), pqsignal(), proc_exit(), process_postgres_switches(), process_session_preload_libraries(), ProcessCompletedNotifies(), ProcessConfigFile(), procsignal_sigusr1_handler(), progname, QueryCancelPending, quickdie(), ReadCommand(), ReadyForQuery(), ReplicationSlotCleanup(), ReplicationSlotRelease(), RESUME_INTERRUPTS, SelectConfigFiles(), set_ps_display(), SetCurrentStatementStartTimestamp(), SetProcessingMode, SIG_DFL, SIG_IGN, SIGCHLD, SIGHUP, SigHupHandler(), SIGPIPE, SIGQUIT, SIGUSR1, SIGUSR2, start_xact_command(), STATE_FASTPATH, STATE_IDLE, STATE_IDLEINTRANSACTION, STATE_IDLEINTRANSACTION_ABORTED, StatementCancelHandler(), TopMemoryContext, UnBlockSig, userDoption, username, ValidatePgVersion(), WalSndErrorCleanup(), WalSndSignals(), whereToSendOutput, and xact_started.

Referenced by BackendRun(), and main().

3564 {
3565  int firstchar;
3566  StringInfoData input_message;
3567  sigjmp_buf local_sigjmp_buf;
3568  volatile bool send_ready_for_query = true;
3569  bool disable_idle_in_transaction_timeout = false;
3570 
3571  /* Initialize startup process environment if necessary. */
3572  if (!IsUnderPostmaster)
3573  InitStandaloneProcess(argv[0]);
3574 
3576 
3577  /*
3578  * Set default values for command-line options.
3579  */
3580  if (!IsUnderPostmaster)
3582 
3583  /*
3584  * Parse command-line options.
3585  */
3587 
3588  /* Must have gotten a database name, or have a default (the username) */
3589  if (dbname == NULL)
3590  {
3591  dbname = username;
3592  if (dbname == NULL)
3593  ereport(FATAL,
3594  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3595  errmsg("%s: no database nor user name specified",
3596  progname)));
3597  }
3598 
3599  /* Acquire configuration parameters, unless inherited from postmaster */
3600  if (!IsUnderPostmaster)
3601  {
3603  proc_exit(1);
3604  }
3605 
3606  /*
3607  * Set up signal handlers and masks.
3608  *
3609  * Note that postmaster blocked all signals before forking child process,
3610  * so there is no race condition whereby we might receive a signal before
3611  * we have set up the handler.
3612  *
3613  * Also note: it's best not to use any signals that are SIG_IGNored in the
3614  * postmaster. If such a signal arrives before we are able to change the
3615  * handler to non-SIG_IGN, it'll get dropped. Instead, make a dummy
3616  * handler in the postmaster to reserve the signal. (Of course, this isn't
3617  * an issue for signals that are locally generated, such as SIGALRM and
3618  * SIGPIPE.)
3619  */
3620  if (am_walsender)
3621  WalSndSignals();
3622  else
3623  {
3624  pqsignal(SIGHUP, SigHupHandler); /* set flag to read config
3625  * file */
3626  pqsignal(SIGINT, StatementCancelHandler); /* cancel current query */
3627  pqsignal(SIGTERM, die); /* cancel current query and exit */
3628 
3629  /*
3630  * In a standalone backend, SIGQUIT can be generated from the keyboard
3631  * easily, while SIGTERM cannot, so we make both signals do die()
3632  * rather than quickdie().
3633  */
3634  if (IsUnderPostmaster)
3635  pqsignal(SIGQUIT, quickdie); /* hard crash time */
3636  else
3637  pqsignal(SIGQUIT, die); /* cancel current query and exit */
3638  InitializeTimeouts(); /* establishes SIGALRM handler */
3639 
3640  /*
3641  * Ignore failure to write to frontend. Note: if frontend closes
3642  * connection, we will notice it and exit cleanly when control next
3643  * returns to outer loop. This seems safer than forcing exit in the
3644  * midst of output during who-knows-what operation...
3645  */
3650 
3651  /*
3652  * Reset some signals that are accepted by postmaster but not by
3653  * backend
3654  */
3655  pqsignal(SIGCHLD, SIG_DFL); /* system() requires this on some
3656  * platforms */
3657  }
3658 
3659  pqinitmask();
3660 
3661  if (IsUnderPostmaster)
3662  {
3663  /* We allow SIGQUIT (quickdie) at all times */
3664  sigdelset(&BlockSig, SIGQUIT);
3665  }
3666 
3667  PG_SETMASK(&BlockSig); /* block everything except SIGQUIT */
3668 
3669  if (!IsUnderPostmaster)
3670  {
3671  /*
3672  * Validate we have been given a reasonable-looking DataDir (if under
3673  * postmaster, assume postmaster did this already).
3674  */
3675  Assert(DataDir);
3677 
3678  /* Change into DataDir (if under postmaster, was done already) */
3679  ChangeToDataDir();
3680 
3681  /*
3682  * Create lockfile for data directory.
3683  */
3684  CreateDataDirLockFile(false);
3685 
3686  /* Initialize MaxBackends (if under postmaster, was done already) */
3688  }
3689 
3690  /* Early initialization */
3691  BaseInit();
3692 
3693  /*
3694  * Create a per-backend PGPROC struct in shared memory, except in the
3695  * EXEC_BACKEND case where this was done in SubPostmasterMain. We must do
3696  * this before we can use LWLocks (and in the EXEC_BACKEND case we already
3697  * had to do some stuff with LWLocks).
3698  */
3699 #ifdef EXEC_BACKEND
3700  if (!IsUnderPostmaster)
3701  InitProcess();
3702 #else
3703  InitProcess();
3704 #endif
3705 
3706  /* We need to allow SIGINT, etc during the initial transaction */
3708 
3709  /*
3710  * General initialization.
3711  *
3712  * NOTE: if you are tempted to add code in this vicinity, consider putting
3713  * it inside InitPostgres() instead. In particular, anything that
3714  * involves database access should be there, not here.
3715  */
3717 
3718  /*
3719  * If the PostmasterContext is still around, recycle the space; we don't
3720  * need it anymore after InitPostgres completes. Note this does not trash
3721  * *MyProcPort, because ConnCreate() allocated that space with malloc()
3722  * ... else we'd need to copy the Port data first. Also, subsidiary data
3723  * such as the username isn't lost either; see ProcessStartupPacket().
3724  */
3725  if (PostmasterContext)
3726  {
3729  }
3730 
3732 
3733  /*
3734  * Now all GUC states are fully set up. Report them to client if
3735  * appropriate.
3736  */
3738 
3739  /*
3740  * Also set up handler to log session end; we have to wait till now to be
3741  * sure Log_disconnections has its final value.
3742  */
3745 
3746  /* Perform initialization specific to a WAL sender process. */
3747  if (am_walsender)
3748  InitWalSender();
3749 
3750  /*
3751  * process any libraries that should be preloaded at backend start (this
3752  * likewise can't be done until GUC settings are complete)
3753  */
3755 
3756  /*
3757  * Send this backend's cancellation info to the frontend.
3758  */
3760  {
3762 
3763  pq_beginmessage(&buf, 'K');
3764  pq_sendint(&buf, (int32) MyProcPid, sizeof(int32));
3765  pq_sendint(&buf, (int32) MyCancelKey, sizeof(int32));
3766  pq_endmessage(&buf);
3767  /* Need not flush since ReadyForQuery will do it. */
3768  }
3769 
3770  /* Welcome banner for standalone case */
3772  printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
3773 
3774  /*
3775  * Create the memory context we will use in the main loop.
3776  *
3777  * MessageContext is reset once per iteration of the main loop, ie, upon
3778  * completion of processing of each command message from the client.
3779  */
3781  "MessageContext",
3783 
3784  /*
3785  * Remember stand-alone backend startup time
3786  */
3787  if (!IsUnderPostmaster)
3789 
3790  /*
3791  * POSTGRES main processing loop begins here
3792  *
3793  * If an exception is encountered, processing resumes here so we abort the
3794  * current transaction and start a new one.
3795  *
3796  * You might wonder why this isn't coded as an infinite loop around a
3797  * PG_TRY construct. The reason is that this is the bottom of the
3798  * exception stack, and so with PG_TRY there would be no exception handler
3799  * in force at all during the CATCH part. By leaving the outermost setjmp
3800  * always active, we have at least some chance of recovering from an error
3801  * during error recovery. (If we get into an infinite loop thereby, it
3802  * will soon be stopped by overflow of elog.c's internal state stack.)
3803  *
3804  * Note that we use sigsetjmp(..., 1), so that this function's signal mask
3805  * (to wit, UnBlockSig) will be restored when longjmp'ing to here. This
3806  * is essential in case we longjmp'd out of a signal handler on a platform
3807  * where that leaves the signal blocked. It's not redundant with the
3808  * unblock in AbortTransaction() because the latter is only called if we
3809  * were inside a transaction.
3810  */
3811 
3812  if (sigsetjmp(local_sigjmp_buf, 1) != 0)
3813  {
3814  /*
3815  * NOTE: if you are tempted to add more code in this if-block,
3816  * consider the high probability that it should be in
3817  * AbortTransaction() instead. The only stuff done directly here
3818  * should be stuff that is guaranteed to apply *only* for outer-level
3819  * error recovery, such as adjusting the FE/BE protocol status.
3820  */
3821 
3822  /* Since not using PG_TRY, must reset error stack by hand */
3824 
3825  /* Prevent interrupts while cleaning up */
3826  HOLD_INTERRUPTS();
3827 
3828  /*
3829  * Forget any pending QueryCancel request, since we're returning to
3830  * the idle loop anyway, and cancel any active timeout requests. (In
3831  * future we might want to allow some timeout requests to survive, but
3832  * at minimum it'd be necessary to do reschedule_timeouts(), in case
3833  * we got here because of a query cancel interrupting the SIGALRM
3834  * interrupt handler.) Note in particular that we must clear the
3835  * statement and lock timeout indicators, to prevent any future plain
3836  * query cancels from being misreported as timeouts in case we're
3837  * forgetting a timeout cancel.
3838  */
3839  disable_all_timeouts(false);
3840  QueryCancelPending = false; /* second to avoid race condition */
3841 
3842  /* Not reading from the client anymore. */
3843  DoingCommandRead = false;
3844 
3845  /* Make sure libpq is in a good state */
3846  pq_comm_reset();
3847 
3848  /* Report the error to the client and/or server log */
3849  EmitErrorReport();
3850 
3851  /*
3852  * Make sure debug_query_string gets reset before we possibly clobber
3853  * the storage it points at.
3854  */
3856 
3857  /*
3858  * Abort the current transaction in order to recover.
3859  */
3861 
3862  if (am_walsender)
3864 
3865  /*
3866  * We can't release replication slots inside AbortTransaction() as we
3867  * need to be able to start and abort transactions while having a slot
3868  * acquired. But we never need to hold them across top level errors,
3869  * so releasing here is fine. There's another cleanup in ProcKill()
3870  * ensuring we'll correctly cleanup on FATAL errors as well.
3871  */
3872  if (MyReplicationSlot != NULL)
3874 
3875  /* We also want to cleanup temporary slots on error. */
3877 
3878  /*
3879  * Now return to normal top-level context and clear ErrorContext for
3880  * next time.
3881  */
3883  FlushErrorState();
3884 
3885  /*
3886  * If we were handling an extended-query-protocol message, initiate
3887  * skip till next Sync. This also causes us not to issue
3888  * ReadyForQuery (until we get Sync).
3889  */
3891  ignore_till_sync = true;
3892 
3893  /* We don't have a transaction command open anymore */
3894  xact_started = false;
3895 
3896  /*
3897  * If an error occurred while we were reading a message from the
3898  * client, we have potentially lost track of where the previous
3899  * message ends and the next one begins. Even though we have
3900  * otherwise recovered from the error, we cannot safely read any more
3901  * messages from the client, so there isn't much we can do with the
3902  * connection anymore.
3903  */
3904  if (pq_is_reading_msg())
3905  ereport(FATAL,
3906  (errcode(ERRCODE_PROTOCOL_VIOLATION),
3907  errmsg("terminating connection because protocol synchronization was lost")));
3908 
3909  /* Now we can allow interrupts again */
3911  }
3912 
3913  /* We can now handle ereport(ERROR) */
3914  PG_exception_stack = &local_sigjmp_buf;
3915 
3916  if (!ignore_till_sync)
3917  send_ready_for_query = true; /* initially, or after error */
3918 
3919  /*
3920  * Non-error queries loop here.
3921  */
3922 
3923  for (;;)
3924  {
3925  /*
3926  * At top of loop, reset extended-query-message flag, so that any
3927  * errors encountered in "idle" state don't provoke skip.
3928  */
3930 
3931  /*
3932  * Release storage left over from prior query cycle, and create a new
3933  * query input buffer in the cleared MessageContext.
3934  */
3937 
3938  initStringInfo(&input_message);
3939 
3940  /*
3941  * Also consider releasing our catalog snapshot if any, so that it's
3942  * not preventing advance of global xmin while we wait for the client.
3943  */
3945 
3946  /*
3947  * (1) If we've reached idle state, tell the frontend we're ready for
3948  * a new query.
3949  *
3950  * Note: this includes fflush()'ing the last of the prior output.
3951  *
3952  * This is also a good time to send collected statistics to the
3953  * collector, and to update the PS stats display. We avoid doing
3954  * those every time through the message loop because it'd slow down
3955  * processing of batched messages, and because we don't want to report
3956  * uncommitted updates (that confuses autovacuum). The notification
3957  * processor wants a call too, if we are not in a transaction block.
3958  */
3959  if (send_ready_for_query)
3960  {
3962  {
3963  set_ps_display("idle in transaction (aborted)", false);
3965 
3966  /* Start the idle-in-transaction timer */
3968  {
3969  disable_idle_in_transaction_timeout = true;
3972  }
3973  }
3975  {
3976  set_ps_display("idle in transaction", false);
3978 
3979  /* Start the idle-in-transaction timer */
3981  {
3982  disable_idle_in_transaction_timeout = true;
3985  }
3986  }
3987  else
3988  {
3990  pgstat_report_stat(false);
3991 
3992  set_ps_display("idle", false);
3994  }
3995 
3997  send_ready_for_query = false;
3998  }
3999 
4000  /*
4001  * (2) Allow asynchronous signals to be executed immediately if they
4002  * come in while we are waiting for client input. (This must be
4003  * conditional since we don't want, say, reads on behalf of COPY FROM
4004  * STDIN doing the same thing.)
4005  */
4006  DoingCommandRead = true;
4007 
4008  /*
4009  * (3) read a command (loop blocks here)
4010  */
4011  firstchar = ReadCommand(&input_message);
4012 
4013  /*
4014  * (4) disable async signal conditions again.
4015  *
4016  * Query cancel is supposed to be a no-op when there is no query in
4017  * progress, so if a query cancel arrived while we were idle, just
4018  * reset QueryCancelPending. ProcessInterrupts() has that effect when
4019  * it's called when DoingCommandRead is set, so check for interrupts
4020  * before resetting DoingCommandRead.
4021  */
4023  DoingCommandRead = false;
4024 
4025  /*
4026  * (5) turn off the idle-in-transaction timeout
4027  */
4028  if (disable_idle_in_transaction_timeout)
4029  {
4031  disable_idle_in_transaction_timeout = false;
4032  }
4033 
4034  /*
4035  * (6) check for any other interesting events that happened while we
4036  * slept.
4037  */
4038  if (got_SIGHUP)
4039  {
4040  got_SIGHUP = false;
4042  }
4043 
4044  /*
4045  * (7) process the command. But ignore it if we're skipping till
4046  * Sync.
4047  */
4048  if (ignore_till_sync && firstchar != EOF)
4049  continue;
4050 
4051  switch (firstchar)
4052  {
4053  case 'Q': /* simple query */
4054  {
4055  const char *query_string;
4056 
4057  /* Set statement_timestamp() */
4059 
4060  query_string = pq_getmsgstring(&input_message);
4061  pq_getmsgend(&input_message);
4062 
4063  if (am_walsender)
4064  exec_replication_command(query_string);
4065  else
4066  exec_simple_query(query_string);
4067 
4068  send_ready_for_query = true;
4069  }
4070  break;
4071 
4072  case 'P': /* parse */
4073  {
4074  const char *stmt_name;
4075  const char *query_string;
4076  int numParams;
4077  Oid *paramTypes = NULL;
4078 
4079  forbidden_in_wal_sender(firstchar);
4080 
4081  /* Set statement_timestamp() */
4083 
4084  stmt_name = pq_getmsgstring(&input_message);
4085  query_string = pq_getmsgstring(&input_message);
4086  numParams = pq_getmsgint(&input_message, 2);
4087  if (numParams > 0)
4088  {
4089  int i;
4090 
4091  paramTypes = (Oid *) palloc(numParams * sizeof(Oid));
4092  for (i = 0; i < numParams; i++)
4093  paramTypes[i] = pq_getmsgint(&input_message, 4);
4094  }
4095  pq_getmsgend(&input_message);
4096 
4097  exec_parse_message(query_string, stmt_name,
4098  paramTypes, numParams);
4099  }
4100  break;
4101 
4102  case 'B': /* bind */
4103  forbidden_in_wal_sender(firstchar);
4104 
4105  /* Set statement_timestamp() */
4107 
4108  /*
4109  * this message is complex enough that it seems best to put
4110  * the field extraction out-of-line
4111  */
4112  exec_bind_message(&input_message);
4113  break;
4114 
4115  case 'E': /* execute */
4116  {
4117  const char *portal_name;
4118  int max_rows;
4119 
4120  forbidden_in_wal_sender(firstchar);
4121 
4122  /* Set statement_timestamp() */
4124 
4125  portal_name = pq_getmsgstring(&input_message);
4126  max_rows = pq_getmsgint(&input_message, 4);
4127  pq_getmsgend(&input_message);
4128 
4129  exec_execute_message(portal_name, max_rows);
4130  }
4131  break;
4132 
4133  case 'F': /* fastpath function call */
4134  forbidden_in_wal_sender(firstchar);
4135 
4136  /* Set statement_timestamp() */
4138 
4139  /* Report query to various monitoring facilities. */
4141  set_ps_display("<FASTPATH>", false);
4142 
4143  /* start an xact for this function invocation */
4145 
4146  /*
4147  * Note: we may at this point be inside an aborted
4148  * transaction. We can't throw error for that until we've
4149  * finished reading the function-call message, so
4150  * HandleFunctionRequest() must check for it after doing so.
4151  * Be careful not to do anything that assumes we're inside a
4152  * valid transaction here.
4153  */
4154 
4155  /* switch back to message context */
4157 
4158  if (HandleFunctionRequest(&input_message) == EOF)
4159  {
4160  /* lost frontend connection during F message input */
4161 
4162  /*
4163  * Reset whereToSendOutput to prevent ereport from
4164  * attempting to send any more messages to client.
4165  */
4168 
4169  proc_exit(0);
4170  }
4171 
4172  /* commit the function-invocation transaction */
4174 
4175  send_ready_for_query = true;
4176  break;
4177 
4178  case 'C': /* close */
4179  {
4180  int close_type;
4181  const char *close_target;
4182 
4183  forbidden_in_wal_sender(firstchar);
4184 
4185  close_type = pq_getmsgbyte(&input_message);
4186  close_target = pq_getmsgstring(&input_message);
4187  pq_getmsgend(&input_message);
4188 
4189  switch (close_type)
4190  {
4191  case 'S':
4192  if (close_target[0] != '\0')
4193  DropPreparedStatement(close_target, false);
4194  else
4195  {
4196  /* special-case the unnamed statement */
4198  }
4199  break;
4200  case 'P':
4201  {
4202  Portal portal;
4203 
4204  portal = GetPortalByName(close_target);
4205  if (PortalIsValid(portal))
4206  PortalDrop(portal, false);
4207  }
4208  break;
4209  default:
4210  ereport(ERROR,
4211  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4212  errmsg("invalid CLOSE message subtype %d",
4213  close_type)));
4214  break;
4215  }
4216 
4218  pq_putemptymessage('3'); /* CloseComplete */
4219  }
4220  break;
4221 
4222  case 'D': /* describe */
4223  {
4224  int describe_type;
4225  const char *describe_target;
4226 
4227  forbidden_in_wal_sender(firstchar);
4228 
4229  /* Set statement_timestamp() (needed for xact) */
4231 
4232  describe_type = pq_getmsgbyte(&input_message);
4233  describe_target = pq_getmsgstring(&input_message);
4234  pq_getmsgend(&input_message);
4235 
4236  switch (describe_type)
4237  {
4238  case 'S':
4239  exec_describe_statement_message(describe_target);
4240  break;
4241  case 'P':
4242  exec_describe_portal_message(describe_target);
4243  break;
4244  default:
4245  ereport(ERROR,
4246  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4247  errmsg("invalid DESCRIBE message subtype %d",
4248  describe_type)));
4249  break;
4250  }
4251  }
4252  break;
4253 
4254  case 'H': /* flush */
4255  pq_getmsgend(&input_message);
4257  pq_flush();
4258  break;
4259 
4260  case 'S': /* sync */
4261  pq_getmsgend(&input_message);
4263  send_ready_for_query = true;
4264  break;
4265 
4266  /*
4267  * 'X' means that the frontend is closing down the socket. EOF
4268  * means unexpected loss of frontend connection. Either way,
4269  * perform normal shutdown.
4270  */
4271  case 'X':
4272  case EOF:
4273 
4274  /*
4275  * Reset whereToSendOutput to prevent ereport from attempting
4276  * to send any more messages to client.
4277  */
4280 
4281  /*
4282  * NOTE: if you are tempted to add more code here, DON'T!
4283  * Whatever you had in mind to do should be set up as an
4284  * on_proc_exit or on_shmem_exit callback, instead. Otherwise
4285  * it will fail to be called during other backend-shutdown
4286  * scenarios.
4287  */
4288  proc_exit(0);
4289 
4290  case 'd': /* copy data */
4291  case 'c': /* copy done */
4292  case 'f': /* copy fail */
4293 
4294  /*
4295  * Accept but ignore these messages, per protocol spec; we
4296  * probably got here because a COPY failed, and the frontend
4297  * is still sending data.
4298  */
4299  break;
4300 
4301  default:
4302  ereport(FATAL,
4303  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4304  errmsg("invalid frontend message type %d",
4305  firstchar)));
4306  }
4307  } /* end of input-reading loop */
4308 }
void InitializeTimeouts(void)
Definition: timeout.c:340
void AbortCurrentTransaction(void)
Definition: xact.c:2984
static void exec_describe_portal_message(const char *portal_name)
Definition: postgres.c:2383
#define SIGUSR1
Definition: win32.h:211
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:200
void BeginReportingGUCOptions(void)
Definition: guc.c:5317
int MyProcPid
Definition: globals.c:38
#define pq_flush()
Definition: libpq.h:40
static int ReadCommand(StringInfo inBuf)
Definition: postgres.c:502
static void finish_xact_command(void)
Definition: postgres.c:2452
void ProcessConfigFile(GucContext context)
static volatile sig_atomic_t got_SIGHUP
Definition: postgres.c:129
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1569
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:292
void pgstat_report_activity(BackendState state, const char *cmd_str)
Definition: pgstat.c:2805
const char * pq_getmsgstring(StringInfo msg)
Definition: pqformat.c:621
Portal GetPortalByName(const char *name)
Definition: portalmem.c:129
void InitStandaloneProcess(const char *argv0)
Definition: miscinit.c:219
void ValidatePgVersion(const char *path)
Definition: miscinit.c:1333
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:326
static void forbidden_in_wal_sender(char firstchar)
Definition: postgres.c:4318
void proc_exit(int code)
Definition: ipc.c:99
int errcode(int sqlerrcode)
Definition: elog.c:575
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4320
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:421
#define SetProcessingMode(mode)
Definition: miscadmin.h:371
void ReplicationSlotCleanup()
Definition: slot.c:412
void BaseInit(void)
Definition: postinit.c:517
unsigned int Oid
Definition: postgres_ext.h:31
volatile bool QueryCancelPending
Definition: globals.c:30
const char * progname
Definition: pg_standby.c:37
#define SIGQUIT
Definition: win32.h:197
void FlushErrorState(void)
Definition: elog.c:1587
#define PG_SETMASK(mask)
Definition: pqsignal.h:19
void pq_beginmessage(StringInfo buf, char msgtype)
Definition: pqformat.c:88
void StatementCancelHandler(SIGNAL_ARGS)
Definition: postgres.c:2648
signed int int32
Definition: c.h:253
static void exec_execute_message(const char *portal_name, long max_rows)
Definition: postgres.c:1841
static void log_disconnections(int code, Datum arg)
Definition: postgres.c:4478
#define RESUME_INTERRUPTS()
Definition: miscadmin.h:116
ErrorContextCallback * error_context_stack
Definition: elog.c:88
void pqinitmask(void)
Definition: pqsignal.c:41
bool am_walsender
Definition: walsender.c:106
#define SIG_IGN
Definition: win32.h:193
void disable_all_timeouts(bool keep_indicators)
Definition: timeout.c:596
#define ERROR
Definition: elog.h:43
void CreateDataDirLockFile(bool amPostmaster)
Definition: miscinit.c:1073
bool pq_is_reading_msg(void)
Definition: pqcomm.c:1197
int IdleInTransactionSessionTimeout
Definition: proc.c:63
int32 MyCancelKey
Definition: globals.c:41
void WalSndSignals(void)
Definition: walsender.c:2563
#define FATAL
Definition: elog.h:52
static void SigHupHandler(SIGNAL_ARGS)
Definition: postgres.c:2682
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:145
void InitProcess(void)
Definition: proc.c:287
Definition: dest.h:88
static char * buf
Definition: pg_test_fsync.c:65
bool IsUnderPostmaster
Definition: globals.c:100
static void exec_bind_message(StringInfo input_message)
Definition: postgres.c:1458
Definition: dest.h:89
void ChangeToDataDir(void)
Definition: miscinit.c:115
void ReplicationSlotRelease(void)
Definition: slot.c:374
sigset_t UnBlockSig
Definition: pqsignal.c:22
static bool xact_started
Definition: postgres.c:135
void InitWalSender(void)
#define ereport(elevel, rest)
Definition: elog.h:122
void exec_replication_command(const char *cmd_string)
Definition: walsender.c:1222
MemoryContext TopMemoryContext
Definition: mcxt.c:43
Definition: guc.h:72
void initStringInfo(StringInfo str)
Definition: stringinfo.c:65
const char * debug_query_string
Definition: postgres.c:83
#define MemoryContextResetAndDeleteChildren(ctx)
Definition: memutils.h:88
static void exec_parse_message(const char *query_string, const char *stmt_name, Oid *paramTypes, int numParams)
Definition: postgres.c:1196
#define PortalIsValid(p)
Definition: portal.h:197
static void start_xact_command(void)
Definition: postgres.c:2434
static bool doing_extended_query_message
Definition: postgres.c:148
sigset_t BlockSig
Definition: pqsignal.c:22
void process_session_preload_libraries(void)
Definition: miscinit.c:1478
void WalSndErrorCleanup(void)
Definition: walsender.c:257
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:440
bool SelectConfigFiles(const char *userDoption, const char *progname)
Definition: guc.c:4646
void EmitErrorReport(void)
Definition: elog.c:1446
TimestampTz PgStartTime
Definition: timestamp.c:48
#define SIGPIPE
Definition: win32.h:201
#define SIGHUP
Definition: win32.h:196
static char * username
Definition: initdb.c:130
#define InvalidOid
Definition: postgres_ext.h:36
#define SIG_DFL
Definition: win32.h:191
pqsigfunc pqsignal(int signum, pqsigfunc handler)
Definition: signal.c:168
int pq_getmsgbyte(StringInfo msg)
Definition: pqformat.c:432
void enable_timeout_after(TimeoutId id, int delay_ms)
Definition: timeout.c:428
ReplicationSlot * MyReplicationSlot
Definition: slot.c:95
#define pq_comm_reset()
Definition: libpq.h:39
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
void ProcessCompletedNotifies(void)
Definition: async.c:1096
void InvalidateCatalogSnapshotConditionally(void)
Definition: snapmgr.c:527
static bool DoingCommandRead
Definition: postgres.c:142
void InitializeMaxBackends(void)
Definition: postinit.c:495
char * dbname
Definition: streamutil.c:41
MemoryContext MessageContext
Definition: mcxt.c:47
sigjmp_buf * PG_exception_stack
Definition: elog.c:90
static const char * userDoption
Definition: postgres.c:159
void SetCurrentStatementStartTimestamp(void)
Definition: xact.c:739
void InitPostgres(const char *in_dbname, Oid dboid, const char *username, Oid useroid, char *out_dbname)
Definition: postinit.c:558
void * palloc(Size size)
Definition: mcxt.c:891
int errmsg(const char *fmt,...)
Definition: elog.c:797
void PortalDrop(Portal portal, bool isTopCommit)
Definition: portalmem.c:461
void pq_sendint(StringInfo buf, int i, int b)
Definition: pqformat.c:236
void ReadyForQuery(CommandDest dest)
Definition: dest.c:241
void pq_endmessage(StringInfo buf)
Definition: pqformat.c:344
void die(SIGNAL_ARGS)
Definition: postgres.c:2617
#define HOLD_INTERRUPTS()
Definition: miscadmin.h:114
int i
void FloatExceptionHandler(SIGNAL_ARGS)
Definition: postgres.c:2669
static void drop_unnamed_stmt(void)
Definition: postgres.c:2531
char * DataDir
Definition: globals.c:59
unsigned int pq_getmsgint(StringInfo msg, int b)
Definition: pqformat.c:448
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
bool Log_disconnections
Definition: postgres.c:89
void process_postgres_switches(int argc, char *argv[], GucContext ctx, const char **dbname)
Definition: postgres.c:3302
void pq_getmsgend(StringInfo msg)
Definition: pqformat.c:677
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:525
void procsignal_sigusr1_handler(SIGNAL_ARGS)
Definition: procsignal.c:260
CommandDest whereToSendOutput
Definition: postgres.c:86
#define SIGCHLD
Definition: win32.h:206
static bool ignore_till_sync
Definition: postgres.c:149
void quickdie(SIGNAL_ARGS)
Definition: postgres.c:2556
MemoryContext PostmasterContext
Definition: mcxt.c:45
#define SIGUSR2
Definition: win32.h:212
static void exec_simple_query(const char *query_string)
Definition: postgres.c:880
int HandleFunctionRequest(StringInfo msgBuf)
Definition: fastpath.c:270
void InitializeGUCOptions(void)
Definition: guc.c:4424
void pgstat_report_stat(bool force)
Definition: pgstat.c:747
void DropPreparedStatement(const char *stmt_name, bool showError)
Definition: prepare.c:579
static void exec_describe_statement_message(const char *stmt_name)
Definition: postgres.c:2290
void process_postgres_switches ( int  argc,
char *  argv[],
GucContext  ctx,
const char **  dbname 
)

Definition at line 3302 of file postgres.c.

References EchoQuery, ereport, errcode(), errhint(), errmsg(), ERROR, FATAL, flag(), free, FrontendProtocol, get_stats_option_name(), getopt(), IsBinaryUpgrade, IsUnderPostmaster, MAXPGPATH, name, NULL, optarg, opterr, optind, OutputFileName, ParseLongOption(), PGC_POSTMASTER, PGC_S_ARGV, PGC_S_CLIENT, progname, set_debug_options(), set_plan_disabling_options(), SetConfigOption(), strlcpy(), userDoption, UseSemiNewlineNewline, and value.

Referenced by PostgresMain(), and process_startup_options().

3304 {
3305  bool secure = (ctx == PGC_POSTMASTER);
3306  int errs = 0;
3307  GucSource gucsource;
3308  int flag;
3309 
3310  if (secure)
3311  {
3312  gucsource = PGC_S_ARGV; /* switches came from command line */
3313 
3314  /* Ignore the initial --single argument, if present */
3315  if (argc > 1 && strcmp(argv[1], "--single") == 0)
3316  {
3317  argv++;
3318  argc--;
3319  }
3320  }
3321  else
3322  {
3323  gucsource = PGC_S_CLIENT; /* switches came from client */
3324  }
3325 
3326 #ifdef HAVE_INT_OPTERR
3327 
3328  /*
3329  * Turn this off because it's either printed to stderr and not the log
3330  * where we'd want it, or argv[0] is now "--single", which would make for
3331  * a weird error message. We print our own error message below.
3332  */
3333  opterr = 0;
3334 #endif
3335 
3336  /*
3337  * Parse command-line options. CAUTION: keep this in sync with
3338  * postmaster/postmaster.c (the option sets should not conflict) and with
3339  * the common help() function in main/main.c.
3340  */
3341  while ((flag = getopt(argc, argv, "B:bc:C:D:d:EeFf:h:ijk:lN:nOo:Pp:r:S:sTt:v:W:-:")) != -1)
3342  {
3343  switch (flag)
3344  {
3345  case 'B':
3346  SetConfigOption("shared_buffers", optarg, ctx, gucsource);
3347  break;
3348 
3349  case 'b':
3350  /* Undocumented flag used for binary upgrades */
3351  if (secure)
3352  IsBinaryUpgrade = true;
3353  break;
3354 
3355  case 'C':
3356  /* ignored for consistency with the postmaster */
3357  break;
3358 
3359  case 'D':
3360  if (secure)
3361  userDoption = strdup(optarg);
3362  break;
3363 
3364  case 'd':
3365  set_debug_options(atoi(optarg), ctx, gucsource);
3366  break;
3367 
3368  case 'E':
3369  if (secure)
3370  EchoQuery = true;
3371  break;
3372 
3373  case 'e':
3374  SetConfigOption("datestyle", "euro", ctx, gucsource);
3375  break;
3376 
3377  case 'F':
3378  SetConfigOption("fsync", "false", ctx, gucsource);
3379  break;
3380 
3381  case 'f':
3382  if (!set_plan_disabling_options(optarg, ctx, gucsource))
3383  errs++;
3384  break;
3385 
3386  case 'h':
3387  SetConfigOption("listen_addresses", optarg, ctx, gucsource);
3388  break;
3389 
3390  case 'i':
3391  SetConfigOption("listen_addresses", "*", ctx, gucsource);
3392  break;
3393 
3394  case 'j':
3395  if (secure)
3396  UseSemiNewlineNewline = true;
3397  break;
3398 
3399  case 'k':
3400  SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
3401  break;
3402 
3403  case 'l':
3404  SetConfigOption("ssl", "true", ctx, gucsource);
3405  break;
3406 
3407  case 'N':
3408  SetConfigOption("max_connections", optarg, ctx, gucsource);
3409  break;
3410 
3411  case 'n':
3412  /* ignored for consistency with postmaster */
3413  break;
3414 
3415  case 'O':
3416  SetConfigOption("allow_system_table_mods", "true", ctx, gucsource);
3417  break;
3418 
3419  case 'o':
3420  errs++;
3421  break;
3422 
3423  case 'P':
3424  SetConfigOption("ignore_system_indexes", "true", ctx, gucsource);
3425  break;
3426 
3427  case 'p':
3428  SetConfigOption("port", optarg, ctx, gucsource);
3429  break;
3430 
3431  case 'r':
3432  /* send output (stdout and stderr) to the given file */
3433  if (secure)
3435  break;
3436 
3437  case 'S':
3438  SetConfigOption("work_mem", optarg, ctx, gucsource);
3439  break;
3440 
3441  case 's':
3442  SetConfigOption("log_statement_stats", "true", ctx, gucsource);
3443  break;
3444 
3445  case 'T':
3446  /* ignored for consistency with the postmaster */
3447  break;
3448 
3449  case 't':
3450  {
3451  const char *tmp = get_stats_option_name(optarg);
3452 
3453  if (tmp)
3454  SetConfigOption(tmp, "true", ctx, gucsource);
3455  else
3456  errs++;
3457  break;
3458  }
3459 
3460  case 'v':
3461 
3462  /*
3463  * -v is no longer used in normal operation, since
3464  * FrontendProtocol is already set before we get here. We keep
3465  * the switch only for possible use in standalone operation,
3466  * in case we ever support using normal FE/BE protocol with a
3467  * standalone backend.
3468  */
3469  if (secure)
3471  break;
3472 
3473  case 'W':
3474  SetConfigOption("post_auth_delay", optarg, ctx, gucsource);
3475  break;
3476 
3477  case 'c':
3478  case '-':
3479  {
3480  char *name,
3481  *value;
3482 
3483  ParseLongOption(optarg, &name, &value);
3484  if (!value)
3485  {
3486  if (flag == '-')
3487  ereport(ERROR,
3488  (errcode(ERRCODE_SYNTAX_ERROR),
3489  errmsg("--%s requires a value",
3490  optarg)));
3491  else
3492  ereport(ERROR,
3493  (errcode(ERRCODE_SYNTAX_ERROR),
3494  errmsg("-c %s requires a value",
3495  optarg)));
3496  }
3497  SetConfigOption(name, value, ctx, gucsource);
3498  free(name);
3499  if (value)
3500  free(value);
3501  break;
3502  }
3503 
3504  default:
3505  errs++;
3506  break;
3507  }
3508 
3509  if (errs)
3510  break;
3511  }
3512 
3513  /*
3514  * Optional database name should be there only if *dbname is NULL.
3515  */
3516  if (!errs && dbname && *dbname == NULL && argc - optind >= 1)
3517  *dbname = strdup(argv[optind++]);
3518 
3519  if (errs || argc != optind)
3520  {
3521  if (errs)
3522  optind--; /* complain about the previous argument */
3523 
3524  /* spell the error message a bit differently depending on context */
3525  if (IsUnderPostmaster)
3526  ereport(FATAL,
3527  (errcode(ERRCODE_SYNTAX_ERROR),
3528  errmsg("invalid command-line argument for server process: %s", argv[optind]),
3529  errhint("Try \"%s --help\" for more information.", progname)));
3530  else
3531  ereport(FATAL,
3532  (errcode(ERRCODE_SYNTAX_ERROR),
3533  errmsg("%s: invalid command-line argument: %s",
3534  progname, argv[optind]),
3535  errhint("Try \"%s --help\" for more information.", progname)));
3536  }
3537 
3538  /*
3539  * Reset getopt(3) library so that it will work correctly in subprocesses
3540  * or when this function is called a second time with another array.
3541  */
3542  optind = 1;
3543 #ifdef HAVE_INT_OPTRESET
3544  optreset = 1; /* some systems need this too */
3545 #endif
3546 }
static struct @76 value
int errhint(const char *fmt,...)
Definition: elog.c:987
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:9327
bool set_plan_disabling_options(const char *arg, GucContext context, GucSource source)
Definition: postgres.c:3220
int errcode(int sqlerrcode)
Definition: elog.c:575
const char * get_stats_option_name(const char *arg)
Definition: postgres.c:3262
void set_debug_options(int debug_flag, GucContext context, GucSource source)
Definition: postgres.c:3191
const char * progname
Definition: pg_standby.c:37
bool IsBinaryUpgrade
Definition: globals.c:101
int getopt(int nargc, char *const *nargv, const char *ostr)
Definition: getopt.c:72
GucSource
Definition: guc.h:105
int optind
Definition: getopt.c:51
#define ERROR
Definition: elog.h:43
#define FATAL
Definition: elog.h:52
#define MAXPGPATH
char OutputFileName[MAXPGPATH]
Definition: globals.c:61
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:6629
bool IsUnderPostmaster
Definition: globals.c:100
char * flag(int b)
Definition: test-ctype.c:33
int opterr
Definition: getopt.c:50
#define ereport(elevel, rest)
Definition: elog.h:122
uint32 ProtocolVersion
Definition: pqcomm.h:113
#define free(a)
Definition: header.h:60
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
#define NULL
Definition: c.h:226
char * dbname
Definition: streamutil.c:41
const char * name
Definition: encode.c:521
static bool EchoQuery
Definition: postgres.c:160
static const char * userDoption
Definition: postgres.c:159
static bool UseSemiNewlineNewline
Definition: postgres.c:161
int errmsg(const char *fmt,...)
Definition: elog.c:797
char * optarg
Definition: getopt.c:53
ProtocolVersion FrontendProtocol
Definition: globals.c:27
void ProcessClientReadInterrupt ( bool  blocked)

Definition at line 522 of file postgres.c.

References catchupInterruptPending, CHECK_FOR_INTERRUPTS, DoingCommandRead, notifyInterruptPending, ProcDiePending, ProcessCatchupInterrupt(), and ProcessNotifyInterrupt().

Referenced by interactive_getc(), and secure_read().

523 {
524  int save_errno = errno;
525 
526  if (DoingCommandRead)
527  {
528  /* Check for general interrupts that arrived while reading */
530 
531  /* Process sinval catchup interrupts that happened while reading */
534 
535  /* Process sinval catchup interrupts that happened while reading */
538  }
539  else if (ProcDiePending && blocked)
540  {
541  /*
542  * We're dying. It's safe (and sane) to handle that now.
543  */
545  }
546 
547  errno = save_errno;
548 }
void ProcessCatchupInterrupt(void)
Definition: sinval.c:177
void ProcessNotifyInterrupt(void)
Definition: async.c:1726
static bool DoingCommandRead
Definition: postgres.c:142
volatile bool ProcDiePending
Definition: globals.c:31
volatile sig_atomic_t notifyInterruptPending
Definition: async.c:356
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:41
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
void ProcessClientWriteInterrupt ( bool  blocked)

Definition at line 560 of file postgres.c.

References CHECK_FOR_INTERRUPTS, DestNone, DestRemote, ProcDiePending, and whereToSendOutput.

Referenced by secure_write().

561 {
562  int save_errno = errno;
563 
564  /*
565  * We only want to process the interrupt here if socket writes are
566  * blocking to increase the chance to get an error message to the client.
567  * If we're not blocked there'll soon be a CHECK_FOR_INTERRUPTS(). But if
568  * we're blocked we'll never get out of that situation if the client has
569  * died.
570  */
571  if (ProcDiePending && blocked)
572  {
573  /*
574  * We're dying. It's safe (and sane) to handle that now. But we don't
575  * want to send the client the error message as that a) would possibly
576  * block again b) would possibly lead to sending an error message to
577  * the client, while we already started to send something else.
578  */
581 
583  }
584 
585  errno = save_errno;
586 }
Definition: dest.h:88
volatile bool ProcDiePending
Definition: globals.c:31
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:97
CommandDest whereToSendOutput
Definition: postgres.c:86
void ProcessInterrupts ( void  )

Definition at line 2819 of file postgres.c.

References Assert, ClientAuthInProgress, ClientConnectionLost, CritSectionCount, DestNone, DestRemote, DoingCommandRead, ereport, errcode(), errdetail_recovery_conflict(), errhint(), errmsg(), ERROR, FATAL, get_timeout_finish_time(), get_timeout_indicator(), HandleParallelMessages(), IdleInTransactionSessionTimeout, IdleInTransactionSessionTimeoutPending, InterruptHoldoffCount, InterruptPending, IsAutoVacuumWorkerProcess(), LOCK_TIMEOUT, LockErrorCleanup(), ParallelMessagePending, pgstat_report_recovery_conflict(), ProcDiePending, PROCSIG_RECOVERY_CONFLICT_DATABASE, QueryCancelHoldoffCount, QueryCancelPending, RecoveryConflictPending, RecoveryConflictReason, RecoveryConflictRetryable, STATEMENT_TIMEOUT, and whereToSendOutput.

Referenced by die().

2820 {
2821  /* OK to accept any interrupts now? */
2822  if (InterruptHoldoffCount != 0 || CritSectionCount != 0)
2823  return;
2824  InterruptPending = false;
2825 
2826  if (ProcDiePending)
2827  {
2828  ProcDiePending = false;
2829  QueryCancelPending = false; /* ProcDie trumps QueryCancel */
2830  LockErrorCleanup();
2831  /* As in quickdie, don't risk sending to client during auth */
2835  ereport(FATAL,
2836  (errcode(ERRCODE_QUERY_CANCELED),
2837  errmsg("canceling authentication due to timeout")));
2838  else if (IsAutoVacuumWorkerProcess())
2839  ereport(FATAL,
2840  (errcode(ERRCODE_ADMIN_SHUTDOWN),
2841  errmsg("terminating autovacuum process due to administrator command")));
2843  {
2845  ereport(FATAL,
2846  (errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
2847  errmsg("terminating connection due to conflict with recovery"),
2849  }
2850  else if (RecoveryConflictPending)
2851  {
2852  /* Currently there is only one non-retryable recovery conflict */
2855  ereport(FATAL,
2856  (errcode(ERRCODE_DATABASE_DROPPED),
2857  errmsg("terminating connection due to conflict with recovery"),
2859  }
2860  else
2861  ereport(FATAL,
2862  (errcode(ERRCODE_ADMIN_SHUTDOWN),
2863  errmsg("terminating connection due to administrator command")));
2864  }
2866  {
2867  QueryCancelPending = false; /* lost connection trumps QueryCancel */
2868  LockErrorCleanup();
2869  /* don't send to client, we already know the connection to be dead. */
2871  ereport(FATAL,
2872  (errcode(ERRCODE_CONNECTION_FAILURE),
2873  errmsg("connection to client lost")));
2874  }
2875 
2876  /*
2877  * If a recovery conflict happens while we are waiting for input from the
2878  * client, the client is presumably just sitting idle in a transaction,
2879  * preventing recovery from making progress. Terminate the connection to
2880  * dislodge it.
2881  */
2883  {
2884  QueryCancelPending = false; /* this trumps QueryCancel */
2885  RecoveryConflictPending = false;
2886  LockErrorCleanup();
2888  ereport(FATAL,
2889  (errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
2890  errmsg("terminating connection due to conflict with recovery"),
2892  errhint("In a moment you should be able to reconnect to the"
2893  " database and repeat your command.")));
2894  }
2895 
2896  if (QueryCancelPending)
2897  {
2898  bool lock_timeout_occurred;
2899  bool stmt_timeout_occurred;
2900 
2901  /*
2902  * Don't allow query cancel interrupts while reading input from the
2903  * client, because we might lose sync in the FE/BE protocol. (Die
2904  * interrupts are OK, because we won't read any further messages from
2905  * the client in that case.)
2906  */
2907  if (QueryCancelHoldoffCount != 0)
2908  {
2909  /*
2910  * Re-arm InterruptPending so that we process the cancel request
2911  * as soon as we're done reading the message.
2912  */
2913  InterruptPending = true;
2914  return;
2915  }
2916 
2917  QueryCancelPending = false;
2918 
2919  /*
2920  * If LOCK_TIMEOUT and STATEMENT_TIMEOUT indicators are both set, we
2921  * need to clear both, so always fetch both.
2922  */
2923  lock_timeout_occurred = get_timeout_indicator(LOCK_TIMEOUT, true);
2924  stmt_timeout_occurred = get_timeout_indicator(STATEMENT_TIMEOUT, true);
2925 
2926  /*
2927  * If both were set, we want to report whichever timeout completed
2928  * earlier; this ensures consistent behavior if the machine is slow
2929  * enough that the second timeout triggers before we get here. A tie
2930  * is arbitrarily broken in favor of reporting a lock timeout.
2931  */
2932  if (lock_timeout_occurred && stmt_timeout_occurred &&
2934  lock_timeout_occurred = false; /* report stmt timeout */
2935 
2936  if (lock_timeout_occurred)
2937  {
2938  LockErrorCleanup();
2939  ereport(ERROR,
2940  (errcode(ERRCODE_LOCK_NOT_AVAILABLE),
2941  errmsg("canceling statement due to lock timeout")));
2942  }
2943  if (stmt_timeout_occurred)
2944  {
2945  LockErrorCleanup();
2946  ereport(ERROR,
2947  (errcode(ERRCODE_QUERY_CANCELED),
2948  errmsg("canceling statement due to statement timeout")));
2949  }
2951  {
2952  LockErrorCleanup();
2953  ereport(ERROR,
2954  (errcode(ERRCODE_QUERY_CANCELED),
2955  errmsg("canceling autovacuum task")));
2956  }
2958  {
2959  RecoveryConflictPending = false;
2960  LockErrorCleanup();
2962  ereport(ERROR,
2963  (errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
2964  errmsg("canceling statement due to conflict with recovery"),
2966  }
2967 
2968  /*
2969  * If we are reading a command from the client, just ignore the cancel
2970  * request --- sending an extra error message won't accomplish
2971  * anything. Otherwise, go ahead and throw the error.
2972  */
2973  if (!DoingCommandRead)
2974  {
2975  LockErrorCleanup();
2976  ereport(ERROR,
2977  (errcode(ERRCODE_QUERY_CANCELED),
2978  errmsg("canceling statement due to user request")));
2979  }
2980  }
2981 
2983  {
2984  /* Has the timeout setting changed since last we looked? */
2986  ereport(FATAL,
2987  (errcode(ERRCODE_IDLE_IN_TRANSACTION_SESSION_TIMEOUT),
2988  errmsg("terminating connection due to idle-in-transaction timeout")));
2989  else
2991 
2992  }
2993 
2996 }
volatile uint32 InterruptHoldoffCount
Definition: globals.c:34
TimestampTz get_timeout_finish_time(TimeoutId id)
Definition: timeout.c:667
int errhint(const char *fmt,...)
Definition: elog.c:987
void pgstat_report_recovery_conflict(int reason)
Definition: pgstat.c:1410
volatile bool IdleInTransactionSessionTimeoutPending
Definition: globals.c:33
volatile uint32 QueryCancelHoldoffCount
Definition: globals.c:35
int errcode(int sqlerrcode)
Definition: elog.c:575
volatile bool QueryCancelPending
Definition: globals.c:30
volatile bool ClientConnectionLost
Definition: globals.c:32
volatile bool ParallelMessagePending
Definition: parallel.c:99
bool ClientAuthInProgress
Definition: postmaster.c:348
#define ERROR
Definition: elog.h:43
int IdleInTransactionSessionTimeout
Definition: proc.c:63
#define FATAL
Definition: elog.h:52
void HandleParallelMessages(void)
Definition: parallel.c:705
Definition: dest.h:88
volatile uint32 CritSectionCount
Definition: globals.c:36
bool IsAutoVacuumWorkerProcess(void)
Definition: autovacuum.c:2989
#define ereport(elevel, rest)
Definition: elog.h:122
void LockErrorCleanup(void)
Definition: proc.c:677
static ProcSignalReason RecoveryConflictReason
Definition: postgres.c:166
static bool RecoveryConflictPending
Definition: postgres.c:164
static bool RecoveryConflictRetryable
Definition: postgres.c:165
bool get_timeout_indicator(TimeoutId id, bool reset_indicator)
Definition: timeout.c:633
static int errdetail_recovery_conflict(void)
Definition: postgres.c:2254
volatile bool InterruptPending
Definition: globals.c:29
#define Assert(condition)
Definition: c.h:671
static bool DoingCommandRead
Definition: postgres.c:142
volatile bool ProcDiePending
Definition: globals.c:31
int errmsg(const char *fmt,...)
Definition: elog.c:797
CommandDest whereToSendOutput
Definition: postgres.c:86
void quickdie ( SIGNAL_ARGS  )

Definition at line 2556 of file postgres.c.

References BlockSig, ClientAuthInProgress, DestNone, DestRemote, ereport, errcode(), errdetail(), errhint(), errmsg(), HOLD_INTERRUPTS, on_exit_reset(), PG_SETMASK, SIGQUIT, WARNING, and whereToSendOutput.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), PostgresMain(), and WalSndSignals().

2557 {
2558  sigaddset(&BlockSig, SIGQUIT); /* prevent nested calls */
2559  PG_SETMASK(&BlockSig);
2560 
2561  /*
2562  * Prevent interrupts while exiting; though we just blocked signals that
2563  * would queue new interrupts, one may have been pending. We don't want a
2564  * quickdie() downgraded to a mere query cancel.
2565  */
2566  HOLD_INTERRUPTS();
2567 
2568  /*
2569  * If we're aborting out of client auth, don't risk trying to send
2570  * anything to the client; we will likely violate the protocol, not to
2571  * mention that we may have interrupted the guts of OpenSSL or some
2572  * authentication library.
2573  */
2576 
2577  /*
2578  * Ideally this should be ereport(FATAL), but then we'd not get control
2579  * back...
2580  */
2581  ereport(WARNING,
2582  (errcode(ERRCODE_CRASH_SHUTDOWN),
2583  errmsg("terminating connection because of crash of another server process"),
2584  errdetail("The postmaster has commanded this server process to roll back"
2585  " the current transaction and exit, because another"
2586  " server process exited abnormally and possibly corrupted"
2587  " shared memory."),
2588  errhint("In a moment you should be able to reconnect to the"
2589  " database and repeat your command.")));
2590 
2591  /*
2592  * We DO NOT want to run proc_exit() callbacks -- we're here because
2593  * shared memory may be corrupted, so we don't want to try to clean up our
2594  * transaction. Just nail the windows shut and get out of town. Now that
2595  * there's an atexit callback to prevent third-party code from breaking
2596  * things by calling exit() directly, we have to reset the callbacks
2597  * explicitly to make this work as intended.
2598  */
2599  on_exit_reset();
2600 
2601  /*
2602  * Note we do exit(2) not exit(0). This is to force the postmaster into a
2603  * system reset cycle if some idiot DBA sends a manual SIGQUIT to a random
2604  * backend. This is necessary precisely because we don't clean up our
2605  * shared memory state. (The "dead man switch" mechanism in pmsignal.c
2606  * should ensure the postmaster sees this as a crash, too, but no harm in
2607  * being doubly sure.)
2608  */
2609  exit(2);
2610 }
int errhint(const char *fmt,...)
Definition: elog.c:987
int errcode(int sqlerrcode)
Definition: elog.c:575
#define SIGQUIT
Definition: win32.h:197
#define PG_SETMASK(mask)
Definition: pqsignal.h:19
bool ClientAuthInProgress
Definition: postmaster.c:348
void on_exit_reset(void)
Definition: ipc.c:396
Definition: dest.h:88
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define ereport(elevel, rest)
Definition: elog.h:122
#define WARNING
Definition: elog.h:40
sigset_t BlockSig
Definition: pqsignal.c:22
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define HOLD_INTERRUPTS()
Definition: miscadmin.h:114
CommandDest whereToSendOutput
Definition: postgres.c:86
static int ReadCommand ( StringInfo  inBuf)
static

Definition at line 502 of file postgres.c.

References DestRemote, InteractiveBackend(), SocketBackend(), and whereToSendOutput.

Referenced by PostgresMain().

503 {
504  int result;
505 
507  result = SocketBackend(inBuf);
508  else
509  result = InteractiveBackend(inBuf);
510  return result;
511 }
static int InteractiveBackend(StringInfo inBuf)
Definition: postgres.c:209
static int SocketBackend(StringInfo inBuf)
Definition: postgres.c:325
CommandDest whereToSendOutput
Definition: postgres.c:86
void RecoveryConflictInterrupt ( ProcSignalReason  reason)

Definition at line 2699 of file postgres.c.

References Assert, elog, FATAL, HoldingBufferPinThatDelaysRecovery(), InterruptPending, IsAbortedTransactionBlockState(), IsSubTransaction(), IsTransactionOrTransactionBlock(), IsWaitingForLock(), MyLatch, MyProc, proc_exit_inprogress, ProcDiePending, PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_TABLESPACE, QueryCancelPending, PGPROC::recoveryConflictPending, RecoveryConflictPending, RecoveryConflictReason, RecoveryConflictRetryable, and SetLatch().

Referenced by procsignal_sigusr1_handler().

2700 {
2701  int save_errno = errno;
2702 
2703  /*
2704  * Don't joggle the elbow of proc_exit
2705  */
2706  if (!proc_exit_inprogress)
2707  {
2708  RecoveryConflictReason = reason;
2709  switch (reason)
2710  {
2712 
2713  /*
2714  * If we aren't waiting for a lock we can never deadlock.
2715  */
2716  if (!IsWaitingForLock())
2717  return;
2718 
2719  /* Intentional drop through to check wait for pin */
2720 
2722 
2723  /*
2724  * If we aren't blocking the Startup process there is nothing
2725  * more to do.
2726  */
2728  return;
2729 
2731 
2732  /* Intentional drop through to error handling */
2733 
2737 
2738  /*
2739  * If we aren't in a transaction any longer then ignore.
2740  */
2742  return;
2743 
2744  /*
2745  * If we can abort just the current subtransaction then we are
2746  * OK to throw an ERROR to resolve the conflict. Otherwise
2747  * drop through to the FATAL case.
2748  *
2749  * XXX other times that we can throw just an ERROR *may* be
2750  * PROCSIG_RECOVERY_CONFLICT_LOCK if no locks are held in
2751  * parent transactions
2752  *
2753  * PROCSIG_RECOVERY_CONFLICT_SNAPSHOT if no snapshots are held
2754  * by parent transactions and the transaction is not
2755  * transaction-snapshot mode
2756  *
2757  * PROCSIG_RECOVERY_CONFLICT_TABLESPACE if no temp files or
2758  * cursors open in parent transactions
2759  */
2760  if (!IsSubTransaction())
2761  {
2762  /*
2763  * If we already aborted then we no longer need to cancel.
2764  * We do this here since we do not wish to ignore aborted
2765  * subtransactions, which must cause FATAL, currently.
2766  */
2768  return;
2769 
2770  RecoveryConflictPending = true;
2771  QueryCancelPending = true;
2772  InterruptPending = true;
2773  break;
2774  }
2775 
2776  /* Intentional drop through to session cancel */
2777 
2779  RecoveryConflictPending = true;
2780  ProcDiePending = true;
2781  InterruptPending = true;
2782  break;
2783 
2784  default:
2785  elog(FATAL, "unrecognized conflict mode: %d",
2786  (int) reason);
2787  }
2788 
2790 
2791  /*
2792  * All conflicts apart from database cause dynamic errors where the
2793  * command or transaction can be retried at a later point with some
2794  * potential for success. No need to reset this, since non-retryable
2795  * conflict errors are currently FATAL.
2796  */
2797  if (reason == PROCSIG_RECOVERY_CONFLICT_DATABASE)
2798  RecoveryConflictRetryable = false;
2799  }
2800 
2801  /*
2802  * Set the process latch. This function essentially emulates signal
2803  * handlers like die() and StatementCancelHandler() and it seems prudent
2804  * to behave similarly as they do.
2805  */
2806  SetLatch(MyLatch);
2807 
2808  errno = save_errno;
2809 }
bool IsWaitingForLock(void)
Definition: proc.c:660
PGPROC * MyProc
Definition: proc.c:67
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:369
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4320
volatile bool QueryCancelPending
Definition: globals.c:30
#define FATAL
Definition: elog.h:52
bool recoveryConflictPending
Definition: proc.h:113
static ProcSignalReason RecoveryConflictReason
Definition: postgres.c:166
static bool RecoveryConflictPending
Definition: postgres.c:164
static bool RecoveryConflictRetryable
Definition: postgres.c:165
volatile bool InterruptPending
Definition: globals.c:29
void SetLatch(volatile Latch *latch)
Definition: latch.c:380
#define Assert(condition)
Definition: c.h:671
bool proc_exit_inprogress
Definition: ipc.c:40
bool HoldingBufferPinThatDelaysRecovery(void)
Definition: bufmgr.c:3675
bool IsSubTransaction(void)
Definition: xact.c:4374
volatile bool ProcDiePending
Definition: globals.c:31
struct Latch * MyLatch
Definition: globals.c:51
#define elog
Definition: elog.h:219
void ResetUsage ( void  )

Definition at line 4376 of file postgres.c.

References getrusage(), gettimeofday(), NULL, RUSAGE_SELF, Save_r, and Save_t.

Referenced by _bt_leafbuild(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite(), pg_analyze_and_rewrite_params(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().

4377 {
4380 }
int gettimeofday(struct timeval *tp, struct timezone *tzp)
Definition: gettimeofday.c:105
static struct rusage Save_r
Definition: postgres.c:4372
int getrusage(int who, struct rusage *rusage)
Definition: getrusage.c:31
static struct timeval Save_t
Definition: postgres.c:4373
#define RUSAGE_SELF
Definition: rusagestub.h:23
#define NULL
Definition: c.h:226
void restore_stack_base ( pg_stack_base_t  base)

Definition at line 3074 of file postgres.c.

References stack_base_ptr.

3075 {
3076 #if defined(__ia64__) || defined(__ia64)
3077  stack_base_ptr = base.stack_base_ptr;
3078  register_stack_base_ptr = base.register_stack_base_ptr;
3079 #else
3080  stack_base_ptr = base;
3081 #endif
3082 }
char * stack_base_ptr
Definition: postgres.c:115
void set_debug_options ( int  debug_flag,
GucContext  context,
GucSource  source 
)

Definition at line 3191 of file postgres.c.

References PGC_POSTMASTER, and SetConfigOption().

Referenced by PostmasterMain(), and process_postgres_switches().

3192 {
3193  if (debug_flag > 0)
3194  {
3195  char debugstr[64];
3196 
3197  sprintf(debugstr, "debug%d", debug_flag);
3198  SetConfigOption("log_min_messages", debugstr, context, source);
3199  }
3200  else
3201  SetConfigOption("log_min_messages", "notice", context, source);
3202 
3203  if (debug_flag >= 1 && context == PGC_POSTMASTER)
3204  {
3205  SetConfigOption("log_connections", "true", context, source);
3206  SetConfigOption("log_disconnections", "true", context, source);
3207  }
3208  if (debug_flag >= 2)
3209  SetConfigOption("log_statement", "all", context, source);
3210  if (debug_flag >= 3)
3211  SetConfigOption("debug_print_parse", "true", context, source);
3212  if (debug_flag >= 4)
3213  SetConfigOption("debug_print_plan", "true", context, source);
3214  if (debug_flag >= 5)
3215  SetConfigOption("debug_print_rewritten", "true", context, source);
3216 }
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:6629
bool set_plan_disabling_options ( const char *  arg,
GucContext  context,
GucSource  source 
)

Definition at line 3220 of file postgres.c.

References NULL, and SetConfigOption().

Referenced by PostmasterMain(), and process_postgres_switches().

3221 {
3222  const char *tmp = NULL;
3223 
3224  switch (arg[0])
3225  {
3226  case 's': /* seqscan */
3227  tmp = "enable_seqscan";
3228  break;
3229  case 'i': /* indexscan */
3230  tmp = "enable_indexscan";
3231  break;
3232  case 'o': /* indexonlyscan */
3233  tmp =