PostgreSQL Source Code  git master
tcopprot.h File Reference
#include "nodes/params.h"
#include "nodes/plannodes.h"
#include "storage/procsignal.h"
#include "utils/guc.h"
#include "utils/queryenvironment.h"
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Macros

#define STACK_DEPTH_SLOP   (512 * 1024L)
 

Enumerations

enum  LogStmtLevel { LOGSTMT_NONE , LOGSTMT_DDL , LOGSTMT_MOD , LOGSTMT_ALL }
 

Functions

Listpg_parse_query (const char *query_string)
 
Listpg_rewrite_query (Query *query)
 
Listpg_analyze_and_rewrite_fixedparams (RawStmt *parsetree, const char *query_string, const Oid *paramTypes, int numParams, QueryEnvironment *queryEnv)
 
Listpg_analyze_and_rewrite_varparams (RawStmt *parsetree, const char *query_string, Oid **paramTypes, int *numParams, QueryEnvironment *queryEnv)
 
Listpg_analyze_and_rewrite_withcb (RawStmt *parsetree, const char *query_string, ParserSetupHook parserSetup, void *parserSetupArg, QueryEnvironment *queryEnv)
 
PlannedStmtpg_plan_query (Query *querytree, const char *query_string, int cursorOptions, ParamListInfo boundParams)
 
Listpg_plan_queries (List *querytrees, const char *query_string, int cursorOptions, ParamListInfo boundParams)
 
void die (SIGNAL_ARGS)
 
void quickdie (SIGNAL_ARGS) pg_attribute_noreturn()
 
void StatementCancelHandler (SIGNAL_ARGS)
 
void FloatExceptionHandler (SIGNAL_ARGS) pg_attribute_noreturn()
 
void HandleRecoveryConflictInterrupt (ProcSignalReason reason)
 
void ProcessClientReadInterrupt (bool blocked)
 
void ProcessClientWriteInterrupt (bool blocked)
 
void process_postgres_switches (int argc, char *argv[], GucContext ctx, const char **dbname)
 
void PostgresSingleUserMain (int argc, char *argv[], const char *username) pg_attribute_noreturn()
 
void PostgresMain (const char *dbname, const char *username) pg_attribute_noreturn()
 
long get_stack_depth_rlimit (void)
 
void ResetUsage (void)
 
void ShowUsage (const char *title)
 
int check_log_duration (char *msec_str, bool was_logged)
 
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)
 

Variables

PGDLLIMPORT CommandDest whereToSendOutput
 
PGDLLIMPORT const char * debug_query_string
 
PGDLLIMPORT int max_stack_depth
 
PGDLLIMPORT int PostAuthDelay
 
PGDLLIMPORT int client_connection_check_interval
 
PGDLLIMPORT int log_statement
 

Macro Definition Documentation

◆ STACK_DEPTH_SLOP

#define STACK_DEPTH_SLOP   (512 * 1024L)

Definition at line 25 of file tcopprot.h.

Enumeration Type Documentation

◆ LogStmtLevel

Enumerator
LOGSTMT_NONE 
LOGSTMT_DDL 
LOGSTMT_MOD 
LOGSTMT_ALL 

Definition at line 35 of file tcopprot.h.

36 {
37  LOGSTMT_NONE, /* log no statements */
38  LOGSTMT_DDL, /* log data definition statements */
39  LOGSTMT_MOD, /* log modification statements, plus DDL */
40  LOGSTMT_ALL, /* log all statements */
41 } LogStmtLevel;
LogStmtLevel
Definition: tcopprot.h:36
@ LOGSTMT_NONE
Definition: tcopprot.h:37
@ LOGSTMT_MOD
Definition: tcopprot.h:39
@ LOGSTMT_DDL
Definition: tcopprot.h:38
@ LOGSTMT_ALL
Definition: tcopprot.h:40

Function Documentation

◆ check_log_duration()

int check_log_duration ( char *  msec_str,
bool  was_logged 
)

Definition at line 2379 of file postgres.c.

2380 {
2381  if (log_duration || log_min_duration_sample >= 0 ||
2383  {
2384  long secs;
2385  int usecs;
2386  int msecs;
2387  bool exceeded_duration;
2388  bool exceeded_sample_duration;
2389  bool in_sample = false;
2390 
2393  &secs, &usecs);
2394  msecs = usecs / 1000;
2395 
2396  /*
2397  * This odd-looking test for log_min_duration_* being exceeded is
2398  * designed to avoid integer overflow with very long durations: don't
2399  * compute secs * 1000 until we've verified it will fit in int.
2400  */
2401  exceeded_duration = (log_min_duration_statement == 0 ||
2403  (secs > log_min_duration_statement / 1000 ||
2404  secs * 1000 + msecs >= log_min_duration_statement)));
2405 
2406  exceeded_sample_duration = (log_min_duration_sample == 0 ||
2407  (log_min_duration_sample > 0 &&
2408  (secs > log_min_duration_sample / 1000 ||
2409  secs * 1000 + msecs >= log_min_duration_sample)));
2410 
2411  /*
2412  * Do not log if log_statement_sample_rate = 0. Log a sample if
2413  * log_statement_sample_rate <= 1 and avoid unnecessary PRNG call if
2414  * log_statement_sample_rate = 1.
2415  */
2416  if (exceeded_sample_duration)
2417  in_sample = log_statement_sample_rate != 0 &&
2418  (log_statement_sample_rate == 1 ||
2420 
2421  if (exceeded_duration || in_sample || log_duration || xact_is_sampled)
2422  {
2423  snprintf(msec_str, 32, "%ld.%03d",
2424  secs * 1000 + msecs, usecs % 1000);
2425  if ((exceeded_duration || in_sample || xact_is_sampled) && !was_logged)
2426  return 2;
2427  else
2428  return 1;
2429  }
2430  }
2431 
2432  return 0;
2433 }
void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: timestamp.c:1730
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1654
int log_min_duration_statement
Definition: guc_tables.c:527
int log_min_duration_sample
Definition: guc_tables.c:526
double log_statement_sample_rate
Definition: guc_tables.c:531
bool log_duration
Definition: guc_tables.c:499
double pg_prng_double(pg_prng_state *state)
Definition: pg_prng.c:268
pg_prng_state pg_global_prng_state
Definition: pg_prng.c:34
#define snprintf
Definition: port.h:238
TimestampTz GetCurrentStatementStartTimestamp(void)
Definition: xact.c:876
bool xact_is_sampled
Definition: xact.c:293

References GetCurrentStatementStartTimestamp(), GetCurrentTimestamp(), log_duration, log_min_duration_sample, log_min_duration_statement, log_statement_sample_rate, pg_global_prng_state, pg_prng_double(), snprintf, TimestampDifference(), and xact_is_sampled.

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

◆ die()

void die ( SIGNAL_ARGS  )

Definition at line 2972 of file postgres.c.

2973 {
2974  /* Don't joggle the elbow of proc_exit */
2975  if (!proc_exit_inprogress)
2976  {
2977  InterruptPending = true;
2978  ProcDiePending = true;
2979  }
2980 
2981  /* for the cumulative stats system */
2983 
2984  /* If we're still here, waken anything waiting on the process latch */
2985  SetLatch(MyLatch);
2986 
2987  /*
2988  * If we're in single user mode, we want to quit immediately - we can't
2989  * rely on latches as they wouldn't work when stdin/stdout is a file.
2990  * Rather ugly, but it's unlikely to be worthwhile to invest much more
2991  * effort just for the benefit of single user mode.
2992  */
2995 }
@ DestRemote
Definition: dest.h:89
volatile sig_atomic_t InterruptPending
Definition: globals.c:30
struct Latch * MyLatch
Definition: globals.c:60
volatile sig_atomic_t ProcDiePending
Definition: globals.c:32
bool proc_exit_inprogress
Definition: ipc.c:40
void SetLatch(Latch *latch)
Definition: latch.c:632
@ DISCONNECT_KILLED
Definition: pgstat.h:82
SessionEndType pgStatSessionEndCause
CommandDest whereToSendOutput
Definition: postgres.c:90
static bool DoingCommandRead
Definition: postgres.c:144
void ProcessInterrupts(void)
Definition: postgres.c:3244

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

Referenced by PostgresMain().

◆ FloatExceptionHandler()

void FloatExceptionHandler ( SIGNAL_ARGS  )

Definition at line 3019 of file postgres.c.

3020 {
3021  /* We're not returning, so no need to save errno */
3022  ereport(ERROR,
3023  (errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
3024  errmsg("floating-point exception"),
3025  errdetail("An invalid floating-point operation was signaled. "
3026  "This probably means an out-of-range result or an "
3027  "invalid operation, such as division by zero.")));
3028 }
int errdetail(const char *fmt,...)
Definition: elog.c:1203
int errcode(int sqlerrcode)
Definition: elog.c:857
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149

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

Referenced by AutoVacWorkerMain(), BackgroundWorkerMain(), plperl_init_interp(), PostgresMain(), and ReplSlotSyncWorkerMain().

◆ get_stack_depth_rlimit()

long get_stack_depth_rlimit ( void  )

Definition at line 4961 of file postgres.c.

4962 {
4963 #if defined(HAVE_GETRLIMIT)
4964  static long val = 0;
4965 
4966  /* This won't change after process launch, so check just once */
4967  if (val == 0)
4968  {
4969  struct rlimit rlim;
4970 
4971  if (getrlimit(RLIMIT_STACK, &rlim) < 0)
4972  val = -1;
4973  else if (rlim.rlim_cur == RLIM_INFINITY)
4974  val = LONG_MAX;
4975  /* rlim_cur is probably of an unsigned type, so check for overflow */
4976  else if (rlim.rlim_cur >= LONG_MAX)
4977  val = LONG_MAX;
4978  else
4979  val = rlim.rlim_cur;
4980  }
4981  return val;
4982 #else
4983  /* On Windows we set the backend stack size in src/backend/Makefile */
4984  return WIN32_STACK_RLIMIT;
4985 #endif
4986 }
long val
Definition: informix.c:670

References val.

Referenced by check_max_stack_depth(), and InitializeGUCOptionsFromEnvironment().

◆ get_stats_option_name()

const char* get_stats_option_name ( const char *  arg)

Definition at line 3750 of file postgres.c.

3751 {
3752  switch (arg[0])
3753  {
3754  case 'p':
3755  if (optarg[1] == 'a') /* "parser" */
3756  return "log_parser_stats";
3757  else if (optarg[1] == 'l') /* "planner" */
3758  return "log_planner_stats";
3759  break;
3760 
3761  case 'e': /* "executor" */
3762  return "log_executor_stats";
3763  break;
3764  }
3765 
3766  return NULL;
3767 }
void * arg
PGDLLIMPORT char * optarg
Definition: getopt.c:52

References arg, and optarg.

Referenced by PostmasterMain(), and process_postgres_switches().

◆ HandleRecoveryConflictInterrupt()

void HandleRecoveryConflictInterrupt ( ProcSignalReason  reason)

Definition at line 3035 of file postgres.c.

3036 {
3037  RecoveryConflictPendingReasons[reason] = true;
3038  RecoveryConflictPending = true;
3039  InterruptPending = true;
3040  /* latch will be set by procsignal_sigusr1_handler */
3041 }
static volatile sig_atomic_t RecoveryConflictPendingReasons[NUM_PROCSIGNALS]
Definition: postgres.c:167
static volatile sig_atomic_t RecoveryConflictPending
Definition: postgres.c:166

References InterruptPending, RecoveryConflictPending, and RecoveryConflictPendingReasons.

Referenced by procsignal_sigusr1_handler().

◆ pg_analyze_and_rewrite_fixedparams()

List* pg_analyze_and_rewrite_fixedparams ( RawStmt parsetree,
const char *  query_string,
const Oid paramTypes,
int  numParams,
QueryEnvironment queryEnv 
)

Definition at line 671 of file postgres.c.

676 {
677  Query *query;
678  List *querytree_list;
679 
680  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
681 
682  /*
683  * (1) Perform parse analysis.
684  */
685  if (log_parser_stats)
686  ResetUsage();
687 
688  query = parse_analyze_fixedparams(parsetree, query_string, paramTypes, numParams,
689  queryEnv);
690 
691  if (log_parser_stats)
692  ShowUsage("PARSE ANALYSIS STATISTICS");
693 
694  /*
695  * (2) Rewrite the queries, as necessary
696  */
697  querytree_list = pg_rewrite_query(query);
698 
699  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
700 
701  return querytree_list;
702 }
bool log_parser_stats
Definition: guc_tables.c:505
Query * parse_analyze_fixedparams(RawStmt *parseTree, const char *sourceText, const Oid *paramTypes, int numParams, QueryEnvironment *queryEnv)
Definition: analyze.c:104
void ShowUsage(const char *title)
Definition: postgres.c:5000
List * pg_rewrite_query(Query *query)
Definition: postgres.c:804
void ResetUsage(void)
Definition: postgres.c:4993
Definition: pg_list.h:54

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

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

◆ pg_analyze_and_rewrite_varparams()

List* pg_analyze_and_rewrite_varparams ( RawStmt parsetree,
const char *  query_string,
Oid **  paramTypes,
int *  numParams,
QueryEnvironment queryEnv 
)

Definition at line 710 of file postgres.c.

715 {
716  Query *query;
717  List *querytree_list;
718 
719  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
720 
721  /*
722  * (1) Perform parse analysis.
723  */
724  if (log_parser_stats)
725  ResetUsage();
726 
727  query = parse_analyze_varparams(parsetree, query_string, paramTypes, numParams,
728  queryEnv);
729 
730  /*
731  * Check all parameter types got determined.
732  */
733  for (int i = 0; i < *numParams; i++)
734  {
735  Oid ptype = (*paramTypes)[i];
736 
737  if (ptype == InvalidOid || ptype == UNKNOWNOID)
738  ereport(ERROR,
739  (errcode(ERRCODE_INDETERMINATE_DATATYPE),
740  errmsg("could not determine data type of parameter $%d",
741  i + 1)));
742  }
743 
744  if (log_parser_stats)
745  ShowUsage("PARSE ANALYSIS STATISTICS");
746 
747  /*
748  * (2) Rewrite the queries, as necessary
749  */
750  querytree_list = pg_rewrite_query(query);
751 
752  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
753 
754  return querytree_list;
755 }
int i
Definition: isn.c:73
Query * parse_analyze_varparams(RawStmt *parseTree, const char *sourceText, Oid **paramTypes, int *numParams, QueryEnvironment *queryEnv)
Definition: analyze.c:144
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31

References ereport, errcode(), errmsg(), ERROR, i, InvalidOid, log_parser_stats, parse_analyze_varparams(), pg_rewrite_query(), ResetUsage(), and ShowUsage().

Referenced by exec_parse_message(), and PrepareQuery().

◆ pg_analyze_and_rewrite_withcb()

List* pg_analyze_and_rewrite_withcb ( RawStmt parsetree,
const char *  query_string,
ParserSetupHook  parserSetup,
void *  parserSetupArg,
QueryEnvironment queryEnv 
)

Definition at line 764 of file postgres.c.

769 {
770  Query *query;
771  List *querytree_list;
772 
773  TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
774 
775  /*
776  * (1) Perform parse analysis.
777  */
778  if (log_parser_stats)
779  ResetUsage();
780 
781  query = parse_analyze_withcb(parsetree, query_string, parserSetup, parserSetupArg,
782  queryEnv);
783 
784  if (log_parser_stats)
785  ShowUsage("PARSE ANALYSIS STATISTICS");
786 
787  /*
788  * (2) Rewrite the queries, as necessary
789  */
790  querytree_list = pg_rewrite_query(query);
791 
792  TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
793 
794  return querytree_list;
795 }
Query * parse_analyze_withcb(RawStmt *parseTree, const char *sourceText, ParserSetupHook parserSetup, void *parserSetupArg, QueryEnvironment *queryEnv)
Definition: analyze.c:185

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

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

◆ pg_parse_query()

List* pg_parse_query ( const char *  query_string)

Definition at line 611 of file postgres.c.

612 {
613  List *raw_parsetree_list;
614 
615  TRACE_POSTGRESQL_QUERY_PARSE_START(query_string);
616 
617  if (log_parser_stats)
618  ResetUsage();
619 
620  raw_parsetree_list = raw_parser(query_string, RAW_PARSE_DEFAULT);
621 
622  if (log_parser_stats)
623  ShowUsage("PARSER STATISTICS");
624 
625 #ifdef COPY_PARSE_PLAN_TREES
626  /* Optional debugging check: pass raw parsetrees through copyObject() */
627  {
628  List *new_list = copyObject(raw_parsetree_list);
629 
630  /* This checks both copyObject() and the equal() routines... */
631  if (!equal(new_list, raw_parsetree_list))
632  elog(WARNING, "copyObject() failed to produce an equal raw parse tree");
633  else
634  raw_parsetree_list = new_list;
635  }
636 #endif
637 
638  /*
639  * Optional debugging check: pass raw parsetrees through
640  * outfuncs/readfuncs
641  */
642 #ifdef WRITE_READ_PARSE_PLAN_TREES
643  {
644  char *str = nodeToStringWithLocations(raw_parsetree_list);
645  List *new_list = stringToNodeWithLocations(str);
646 
647  pfree(str);
648  /* This checks both outfuncs/readfuncs and the equal() routines... */
649  if (!equal(new_list, raw_parsetree_list))
650  elog(WARNING, "outfuncs/readfuncs failed to produce an equal raw parse tree");
651  else
652  raw_parsetree_list = new_list;
653  }
654 #endif
655 
656  TRACE_POSTGRESQL_QUERY_PARSE_DONE(query_string);
657 
658  return raw_parsetree_list;
659 }
List * raw_parser(const char *str, RawParseMode mode)
Definition: parser.c:42
#define WARNING
Definition: elog.h:36
#define elog(elevel,...)
Definition: elog.h:224
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:223
const char * str
static List * new_list(NodeTag type, int min_size)
Definition: list.c:91
void pfree(void *pointer)
Definition: mcxt.c:1520
#define copyObject(obj)
Definition: nodes.h:224
char * nodeToStringWithLocations(const void *obj)
Definition: outfuncs.c:797
@ RAW_PARSE_DEFAULT
Definition: parser.h:39

References copyObject, elog, equal(), log_parser_stats, new_list(), nodeToStringWithLocations(), pfree(), RAW_PARSE_DEFAULT, raw_parser(), ResetUsage(), ShowUsage(), str, and WARNING.

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

◆ pg_plan_queries()

List* pg_plan_queries ( List querytrees,
const char *  query_string,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 972 of file postgres.c.

974 {
975  List *stmt_list = NIL;
976  ListCell *query_list;
977 
978  foreach(query_list, querytrees)
979  {
980  Query *query = lfirst_node(Query, query_list);
981  PlannedStmt *stmt;
982 
983  if (query->commandType == CMD_UTILITY)
984  {
985  /* Utility commands require no planning. */
987  stmt->commandType = CMD_UTILITY;
988  stmt->canSetTag = query->canSetTag;
989  stmt->utilityStmt = query->utilityStmt;
990  stmt->stmt_location = query->stmt_location;
991  stmt->stmt_len = query->stmt_len;
992  stmt->queryId = query->queryId;
993  }
994  else
995  {
996  stmt = pg_plan_query(query, query_string, cursorOptions,
997  boundParams);
998  }
999 
1000  stmt_list = lappend(stmt_list, stmt);
1001  }
1002 
1003  return stmt_list;
1004 }
#define stmt
Definition: indent_codes.h:59
List * lappend(List *list, void *datum)
Definition: list.c:339
@ CMD_UTILITY
Definition: nodes.h:270
#define makeNode(_type_)
Definition: nodes.h:155
#define lfirst_node(type, lc)
Definition: pg_list.h:176
#define NIL
Definition: pg_list.h:68
PlannedStmt * pg_plan_query(Query *querytree, const char *query_string, int cursorOptions, ParamListInfo boundParams)
Definition: postgres.c:886
CmdType commandType
Definition: parsenodes.h:121
Node * utilityStmt
Definition: parsenodes.h:136
ParseLoc stmt_location
Definition: parsenodes.h:238

References CMD_UTILITY, Query::commandType, lappend(), lfirst_node, makeNode, NIL, pg_plan_query(), stmt, Query::stmt_location, and Query::utilityStmt.

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

◆ pg_plan_query()

PlannedStmt* pg_plan_query ( Query querytree,
const char *  query_string,
int  cursorOptions,
ParamListInfo  boundParams 
)

Definition at line 886 of file postgres.c.

888 {
889  PlannedStmt *plan;
890 
891  /* Utility commands have no plans. */
892  if (querytree->commandType == CMD_UTILITY)
893  return NULL;
894 
895  /* Planner must have a snapshot in case it calls user-defined functions. */
897 
898  TRACE_POSTGRESQL_QUERY_PLAN_START();
899 
900  if (log_planner_stats)
901  ResetUsage();
902 
903  /* call the optimizer */
904  plan = planner(querytree, query_string, cursorOptions, boundParams);
905 
906  if (log_planner_stats)
907  ShowUsage("PLANNER STATISTICS");
908 
909 #ifdef COPY_PARSE_PLAN_TREES
910  /* Optional debugging check: pass plan tree through copyObject() */
911  {
912  PlannedStmt *new_plan = copyObject(plan);
913 
914  /*
915  * equal() currently does not have routines to compare Plan nodes, so
916  * don't try to test equality here. Perhaps fix someday?
917  */
918 #ifdef NOT_USED
919  /* This checks both copyObject() and the equal() routines... */
920  if (!equal(new_plan, plan))
921  elog(WARNING, "copyObject() failed to produce an equal plan tree");
922  else
923 #endif
924  plan = new_plan;
925  }
926 #endif
927 
928 #ifdef WRITE_READ_PARSE_PLAN_TREES
929  /* Optional debugging check: pass plan tree through outfuncs/readfuncs */
930  {
931  char *str;
932  PlannedStmt *new_plan;
933 
935  new_plan = stringToNodeWithLocations(str);
936  pfree(str);
937 
938  /*
939  * equal() currently does not have routines to compare Plan nodes, so
940  * don't try to test equality here. Perhaps fix someday?
941  */
942 #ifdef NOT_USED
943  /* This checks both outfuncs/readfuncs and the equal() routines... */
944  if (!equal(new_plan, plan))
945  elog(WARNING, "outfuncs/readfuncs failed to produce an equal plan tree");
946  else
947 #endif
948  plan = new_plan;
949  }
950 #endif
951 
952  /*
953  * Print plan if debugging.
954  */
955  if (Debug_print_plan)
957 
958  TRACE_POSTGRESQL_QUERY_PLAN_DONE();
959 
960  return plan;
961 }
Datum querytree(PG_FUNCTION_ARGS)
Definition: _int_bool.c:666
void elog_node_display(int lev, const char *title, const void *obj, bool pretty)
Definition: print.c:72
#define Assert(condition)
Definition: c.h:858
#define LOG
Definition: elog.h:31
bool Debug_print_plan
Definition: guc_tables.c:500
bool Debug_pretty_print
Definition: guc_tables.c:503
bool log_planner_stats
Definition: guc_tables.c:506
#define plan(x)
Definition: pg_regress.c:162
PlannedStmt * planner(Query *parse, const char *query_string, int cursorOptions, ParamListInfo boundParams)
Definition: planner.c:274
bool ActiveSnapshotSet(void)
Definition: snapmgr.c:782

References ActiveSnapshotSet(), Assert, CMD_UTILITY, copyObject, Debug_pretty_print, Debug_print_plan, elog, elog_node_display(), equal(), LOG, log_planner_stats, nodeToStringWithLocations(), pfree(), plan, planner(), querytree(), ResetUsage(), ShowUsage(), str, and WARNING.

Referenced by BeginCopyTo(), ExecCreateTableAs(), init_execution_state(), PerformCursorOpen(), pg_plan_queries(), refresh_matview_datafill(), and standard_ExplainOneQuery().

◆ pg_rewrite_query()

List* pg_rewrite_query ( Query query)

Definition at line 804 of file postgres.c.

805 {
806  List *querytree_list;
807 
808  if (Debug_print_parse)
809  elog_node_display(LOG, "parse tree", query,
811 
812  if (log_parser_stats)
813  ResetUsage();
814 
815  if (query->commandType == CMD_UTILITY)
816  {
817  /* don't rewrite utilities, just dump 'em into result list */
818  querytree_list = list_make1(query);
819  }
820  else
821  {
822  /* rewrite regular queries */
823  querytree_list = QueryRewrite(query);
824  }
825 
826  if (log_parser_stats)
827  ShowUsage("REWRITER STATISTICS");
828 
829 #ifdef COPY_PARSE_PLAN_TREES
830  /* Optional debugging check: pass querytree through copyObject() */
831  {
832  List *new_list;
833 
834  new_list = copyObject(querytree_list);
835  /* This checks both copyObject() and the equal() routines... */
836  if (!equal(new_list, querytree_list))
837  elog(WARNING, "copyObject() failed to produce an equal rewritten parse tree");
838  else
839  querytree_list = new_list;
840  }
841 #endif
842 
843 #ifdef WRITE_READ_PARSE_PLAN_TREES
844  /* Optional debugging check: pass querytree through outfuncs/readfuncs */
845  {
846  List *new_list = NIL;
847  ListCell *lc;
848 
849  foreach(lc, querytree_list)
850  {
851  Query *curr_query = lfirst_node(Query, lc);
852  char *str = nodeToStringWithLocations(curr_query);
853  Query *new_query = stringToNodeWithLocations(str);
854 
855  /*
856  * queryId is not saved in stored rules, but we must preserve it
857  * here to avoid breaking pg_stat_statements.
858  */
859  new_query->queryId = curr_query->queryId;
860 
861  new_list = lappend(new_list, new_query);
862  pfree(str);
863  }
864 
865  /* This checks both outfuncs/readfuncs and the equal() routines... */
866  if (!equal(new_list, querytree_list))
867  elog(WARNING, "outfuncs/readfuncs failed to produce an equal rewritten parse tree");
868  else
869  querytree_list = new_list;
870  }
871 #endif
872 
874  elog_node_display(LOG, "rewritten parse tree", querytree_list,
876 
877  return querytree_list;
878 }
bool Debug_print_rewritten
Definition: guc_tables.c:502
bool Debug_print_parse
Definition: guc_tables.c:501
#define list_make1(x1)
Definition: pg_list.h:212
List * QueryRewrite(Query *parsetree)

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

Referenced by fmgr_sql_validator(), init_sql_fcache(), inline_set_returning_function(), pg_analyze_and_rewrite_fixedparams(), pg_analyze_and_rewrite_varparams(), and pg_analyze_and_rewrite_withcb().

◆ PostgresMain()

void PostgresMain ( const char *  dbname,
const char *  username 
)

Definition at line 4152 of file postgres.c.

4153 {
4154  sigjmp_buf local_sigjmp_buf;
4155 
4156  /* these must be volatile to ensure state is preserved across longjmp: */
4157  volatile bool send_ready_for_query = true;
4158  volatile bool idle_in_transaction_timeout_enabled = false;
4159  volatile bool idle_session_timeout_enabled = false;
4160 
4161  Assert(dbname != NULL);
4162  Assert(username != NULL);
4163 
4165 
4166  /*
4167  * Set up signal handlers. (InitPostmasterChild or InitStandaloneProcess
4168  * has already set up BlockSig and made that the active signal mask.)
4169  *
4170  * Note that postmaster blocked all signals before forking child process,
4171  * so there is no race condition whereby we might receive a signal before
4172  * we have set up the handler.
4173  *
4174  * Also note: it's best not to use any signals that are SIG_IGNored in the
4175  * postmaster. If such a signal arrives before we are able to change the
4176  * handler to non-SIG_IGN, it'll get dropped. Instead, make a dummy
4177  * handler in the postmaster to reserve the signal. (Of course, this isn't
4178  * an issue for signals that are locally generated, such as SIGALRM and
4179  * SIGPIPE.)
4180  */
4181  if (am_walsender)
4182  WalSndSignals();
4183  else
4184  {
4186  pqsignal(SIGINT, StatementCancelHandler); /* cancel current query */
4187  pqsignal(SIGTERM, die); /* cancel current query and exit */
4188 
4189  /*
4190  * In a postmaster child backend, replace SignalHandlerForCrashExit
4191  * with quickdie, so we can tell the client we're dying.
4192  *
4193  * In a standalone backend, SIGQUIT can be generated from the keyboard
4194  * easily, while SIGTERM cannot, so we make both signals do die()
4195  * rather than quickdie().
4196  */
4197  if (IsUnderPostmaster)
4198  pqsignal(SIGQUIT, quickdie); /* hard crash time */
4199  else
4200  pqsignal(SIGQUIT, die); /* cancel current query and exit */
4201  InitializeTimeouts(); /* establishes SIGALRM handler */
4202 
4203  /*
4204  * Ignore failure to write to frontend. Note: if frontend closes
4205  * connection, we will notice it and exit cleanly when control next
4206  * returns to outer loop. This seems safer than forcing exit in the
4207  * midst of output during who-knows-what operation...
4208  */
4213 
4214  /*
4215  * Reset some signals that are accepted by postmaster but not by
4216  * backend
4217  */
4218  pqsignal(SIGCHLD, SIG_DFL); /* system() requires this on some
4219  * platforms */
4220  }
4221 
4222  /* Early initialization */
4223  BaseInit();
4224 
4225  /* We need to allow SIGINT, etc during the initial transaction */
4226  sigprocmask(SIG_SETMASK, &UnBlockSig, NULL);
4227 
4228  /*
4229  * General initialization.
4230  *
4231  * NOTE: if you are tempted to add code in this vicinity, consider putting
4232  * it inside InitPostgres() instead. In particular, anything that
4233  * involves database access should be there, not here.
4234  *
4235  * Honor session_preload_libraries if not dealing with a WAL sender.
4236  */
4237  InitPostgres(dbname, InvalidOid, /* database to connect to */
4238  username, InvalidOid, /* role to connect as */
4240  NULL); /* no out_dbname */
4241 
4242  /*
4243  * If the PostmasterContext is still around, recycle the space; we don't
4244  * need it anymore after InitPostgres completes.
4245  */
4246  if (PostmasterContext)
4247  {
4249  PostmasterContext = NULL;
4250  }
4251 
4253 
4254  /*
4255  * Now all GUC states are fully set up. Report them to client if
4256  * appropriate.
4257  */
4259 
4260  /*
4261  * Also set up handler to log session end; we have to wait till now to be
4262  * sure Log_disconnections has its final value.
4263  */
4266 
4268 
4269  /* Perform initialization specific to a WAL sender process. */
4270  if (am_walsender)
4271  InitWalSender();
4272 
4273  /*
4274  * Send this backend's cancellation info to the frontend.
4275  */
4277  {
4279 
4283  pq_endmessage(&buf);
4284  /* Need not flush since ReadyForQuery will do it. */
4285  }
4286 
4287  /* Welcome banner for standalone case */
4289  printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
4290 
4291  /*
4292  * Create the memory context we will use in the main loop.
4293  *
4294  * MessageContext is reset once per iteration of the main loop, ie, upon
4295  * completion of processing of each command message from the client.
4296  */
4298  "MessageContext",
4300 
4301  /*
4302  * Create memory context and buffer used for RowDescription messages. As
4303  * SendRowDescriptionMessage(), via exec_describe_statement_message(), is
4304  * frequently executed for ever single statement, we don't want to
4305  * allocate a separate buffer every time.
4306  */
4308  "RowDescriptionContext",
4313 
4314  /* Fire any defined login event triggers, if appropriate */
4316 
4317  /*
4318  * POSTGRES main processing loop begins here
4319  *
4320  * If an exception is encountered, processing resumes here so we abort the
4321  * current transaction and start a new one.
4322  *
4323  * You might wonder why this isn't coded as an infinite loop around a
4324  * PG_TRY construct. The reason is that this is the bottom of the
4325  * exception stack, and so with PG_TRY there would be no exception handler
4326  * in force at all during the CATCH part. By leaving the outermost setjmp
4327  * always active, we have at least some chance of recovering from an error
4328  * during error recovery. (If we get into an infinite loop thereby, it
4329  * will soon be stopped by overflow of elog.c's internal state stack.)
4330  *
4331  * Note that we use sigsetjmp(..., 1), so that this function's signal mask
4332  * (to wit, UnBlockSig) will be restored when longjmp'ing to here. This
4333  * is essential in case we longjmp'd out of a signal handler on a platform
4334  * where that leaves the signal blocked. It's not redundant with the
4335  * unblock in AbortTransaction() because the latter is only called if we
4336  * were inside a transaction.
4337  */
4338 
4339  if (sigsetjmp(local_sigjmp_buf, 1) != 0)
4340  {
4341  /*
4342  * NOTE: if you are tempted to add more code in this if-block,
4343  * consider the high probability that it should be in
4344  * AbortTransaction() instead. The only stuff done directly here
4345  * should be stuff that is guaranteed to apply *only* for outer-level
4346  * error recovery, such as adjusting the FE/BE protocol status.
4347  */
4348 
4349  /* Since not using PG_TRY, must reset error stack by hand */
4350  error_context_stack = NULL;
4351 
4352  /* Prevent interrupts while cleaning up */
4353  HOLD_INTERRUPTS();
4354 
4355  /*
4356  * Forget any pending QueryCancel request, since we're returning to
4357  * the idle loop anyway, and cancel any active timeout requests. (In
4358  * future we might want to allow some timeout requests to survive, but
4359  * at minimum it'd be necessary to do reschedule_timeouts(), in case
4360  * we got here because of a query cancel interrupting the SIGALRM
4361  * interrupt handler.) Note in particular that we must clear the
4362  * statement and lock timeout indicators, to prevent any future plain
4363  * query cancels from being misreported as timeouts in case we're
4364  * forgetting a timeout cancel.
4365  */
4366  disable_all_timeouts(false); /* do first to avoid race condition */
4367  QueryCancelPending = false;
4368  idle_in_transaction_timeout_enabled = false;
4369  idle_session_timeout_enabled = false;
4370 
4371  /* Not reading from the client anymore. */
4372  DoingCommandRead = false;
4373 
4374  /* Make sure libpq is in a good state */
4375  pq_comm_reset();
4376 
4377  /* Report the error to the client and/or server log */
4378  EmitErrorReport();
4379 
4380  /*
4381  * If Valgrind noticed something during the erroneous query, print the
4382  * query string, assuming we have one.
4383  */
4385 
4386  /*
4387  * Make sure debug_query_string gets reset before we possibly clobber
4388  * the storage it points at.
4389  */
4390  debug_query_string = NULL;
4391 
4392  /*
4393  * Abort the current transaction in order to recover.
4394  */
4396 
4397  if (am_walsender)
4399 
4401 
4402  /*
4403  * We can't release replication slots inside AbortTransaction() as we
4404  * need to be able to start and abort transactions while having a slot
4405  * acquired. But we never need to hold them across top level errors,
4406  * so releasing here is fine. There also is a before_shmem_exit()
4407  * callback ensuring correct cleanup on FATAL errors.
4408  */
4409  if (MyReplicationSlot != NULL)
4411 
4412  /* We also want to cleanup temporary slots on error. */
4413  ReplicationSlotCleanup(false);
4414 
4416 
4417  /*
4418  * Now return to normal top-level context and clear ErrorContext for
4419  * next time.
4420  */
4422  FlushErrorState();
4423 
4424  /*
4425  * If we were handling an extended-query-protocol message, initiate
4426  * skip till next Sync. This also causes us not to issue
4427  * ReadyForQuery (until we get Sync).
4428  */
4430  ignore_till_sync = true;
4431 
4432  /* We don't have a transaction command open anymore */
4433  xact_started = false;
4434 
4435  /*
4436  * If an error occurred while we were reading a message from the
4437  * client, we have potentially lost track of where the previous
4438  * message ends and the next one begins. Even though we have
4439  * otherwise recovered from the error, we cannot safely read any more
4440  * messages from the client, so there isn't much we can do with the
4441  * connection anymore.
4442  */
4443  if (pq_is_reading_msg())
4444  ereport(FATAL,
4445  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4446  errmsg("terminating connection because protocol synchronization was lost")));
4447 
4448  /* Now we can allow interrupts again */
4450  }
4451 
4452  /* We can now handle ereport(ERROR) */
4453  PG_exception_stack = &local_sigjmp_buf;
4454 
4455  if (!ignore_till_sync)
4456  send_ready_for_query = true; /* initially, or after error */
4457 
4458  /*
4459  * Non-error queries loop here.
4460  */
4461 
4462  for (;;)
4463  {
4464  int firstchar;
4465  StringInfoData input_message;
4466 
4467  /*
4468  * At top of loop, reset extended-query-message flag, so that any
4469  * errors encountered in "idle" state don't provoke skip.
4470  */
4472 
4473  /*
4474  * For valgrind reporting purposes, the "current query" begins here.
4475  */
4476 #ifdef USE_VALGRIND
4477  old_valgrind_error_count = VALGRIND_COUNT_ERRORS;
4478 #endif
4479 
4480  /*
4481  * Release storage left over from prior query cycle, and create a new
4482  * query input buffer in the cleared MessageContext.
4483  */
4486 
4487  initStringInfo(&input_message);
4488 
4489  /*
4490  * Also consider releasing our catalog snapshot if any, so that it's
4491  * not preventing advance of global xmin while we wait for the client.
4492  */
4494 
4495  /*
4496  * (1) If we've reached idle state, tell the frontend we're ready for
4497  * a new query.
4498  *
4499  * Note: this includes fflush()'ing the last of the prior output.
4500  *
4501  * This is also a good time to flush out collected statistics to the
4502  * cumulative stats system, and to update the PS stats display. We
4503  * avoid doing those every time through the message loop because it'd
4504  * slow down processing of batched messages, and because we don't want
4505  * to report uncommitted updates (that confuses autovacuum). The
4506  * notification processor wants a call too, if we are not in a
4507  * transaction block.
4508  *
4509  * Also, if an idle timeout is enabled, start the timer for that.
4510  */
4511  if (send_ready_for_query)
4512  {
4514  {
4515  set_ps_display("idle in transaction (aborted)");
4517 
4518  /* Start the idle-in-transaction timer */
4521  {
4522  idle_in_transaction_timeout_enabled = true;
4525  }
4526  }
4528  {
4529  set_ps_display("idle in transaction");
4531 
4532  /* Start the idle-in-transaction timer */
4535  {
4536  idle_in_transaction_timeout_enabled = true;
4539  }
4540  }
4541  else
4542  {
4543  long stats_timeout;
4544 
4545  /*
4546  * Process incoming notifies (including self-notifies), if
4547  * any, and send relevant messages to the client. Doing it
4548  * here helps ensure stable behavior in tests: if any notifies
4549  * were received during the just-finished transaction, they'll
4550  * be seen by the client before ReadyForQuery is.
4551  */
4553  ProcessNotifyInterrupt(false);
4554 
4555  /*
4556  * Check if we need to report stats. If pgstat_report_stat()
4557  * decides it's too soon to flush out pending stats / lock
4558  * contention prevented reporting, it'll tell us when we
4559  * should try to report stats again (so that stats updates
4560  * aren't unduly delayed if the connection goes idle for a
4561  * long time). We only enable the timeout if we don't already
4562  * have a timeout in progress, because we don't disable the
4563  * timeout below. enable_timeout_after() needs to determine
4564  * the current timestamp, which can have a negative
4565  * performance impact. That's OK because pgstat_report_stat()
4566  * won't have us wake up sooner than a prior call.
4567  */
4568  stats_timeout = pgstat_report_stat(false);
4569  if (stats_timeout > 0)
4570  {
4573  stats_timeout);
4574  }
4575  else
4576  {
4577  /* all stats flushed, no need for the timeout */
4580  }
4581 
4582  set_ps_display("idle");
4584 
4585  /* Start the idle-session timer */
4586  if (IdleSessionTimeout > 0)
4587  {
4588  idle_session_timeout_enabled = true;
4591  }
4592  }
4593 
4594  /* Report any recently-changed GUC options */
4596 
4598  send_ready_for_query = false;
4599  }
4600 
4601  /*
4602  * (2) Allow asynchronous signals to be executed immediately if they
4603  * come in while we are waiting for client input. (This must be
4604  * conditional since we don't want, say, reads on behalf of COPY FROM
4605  * STDIN doing the same thing.)
4606  */
4607  DoingCommandRead = true;
4608 
4609  /*
4610  * (3) read a command (loop blocks here)
4611  */
4612  firstchar = ReadCommand(&input_message);
4613 
4614  /*
4615  * (4) turn off the idle-in-transaction and idle-session timeouts if
4616  * active. We do this before step (5) so that any last-moment timeout
4617  * is certain to be detected in step (5).
4618  *
4619  * At most one of these timeouts will be active, so there's no need to
4620  * worry about combining the timeout.c calls into one.
4621  */
4622  if (idle_in_transaction_timeout_enabled)
4623  {
4625  idle_in_transaction_timeout_enabled = false;
4626  }
4627  if (idle_session_timeout_enabled)
4628  {
4630  idle_session_timeout_enabled = false;
4631  }
4632 
4633  /*
4634  * (5) disable async signal conditions again.
4635  *
4636  * Query cancel is supposed to be a no-op when there is no query in
4637  * progress, so if a query cancel arrived while we were idle, just
4638  * reset QueryCancelPending. ProcessInterrupts() has that effect when
4639  * it's called when DoingCommandRead is set, so check for interrupts
4640  * before resetting DoingCommandRead.
4641  */
4643  DoingCommandRead = false;
4644 
4645  /*
4646  * (6) check for any other interesting events that happened while we
4647  * slept.
4648  */
4649  if (ConfigReloadPending)
4650  {
4651  ConfigReloadPending = false;
4653  }
4654 
4655  /*
4656  * (7) process the command. But ignore it if we're skipping till
4657  * Sync.
4658  */
4659  if (ignore_till_sync && firstchar != EOF)
4660  continue;
4661 
4662  switch (firstchar)
4663  {
4664  case PqMsg_Query:
4665  {
4666  const char *query_string;
4667 
4668  /* Set statement_timestamp() */
4670 
4671  query_string = pq_getmsgstring(&input_message);
4672  pq_getmsgend(&input_message);
4673 
4674  if (am_walsender)
4675  {
4676  if (!exec_replication_command(query_string))
4677  exec_simple_query(query_string);
4678  }
4679  else
4680  exec_simple_query(query_string);
4681 
4682  valgrind_report_error_query(query_string);
4683 
4684  send_ready_for_query = true;
4685  }
4686  break;
4687 
4688  case PqMsg_Parse:
4689  {
4690  const char *stmt_name;
4691  const char *query_string;
4692  int numParams;
4693  Oid *paramTypes = NULL;
4694 
4695  forbidden_in_wal_sender(firstchar);
4696 
4697  /* Set statement_timestamp() */
4699 
4700  stmt_name = pq_getmsgstring(&input_message);
4701  query_string = pq_getmsgstring(&input_message);
4702  numParams = pq_getmsgint(&input_message, 2);
4703  if (numParams > 0)
4704  {
4705  paramTypes = palloc_array(Oid, numParams);
4706  for (int i = 0; i < numParams; i++)
4707  paramTypes[i] = pq_getmsgint(&input_message, 4);
4708  }
4709  pq_getmsgend(&input_message);
4710 
4711  exec_parse_message(query_string, stmt_name,
4712  paramTypes, numParams);
4713 
4714  valgrind_report_error_query(query_string);
4715  }
4716  break;
4717 
4718  case PqMsg_Bind:
4719  forbidden_in_wal_sender(firstchar);
4720 
4721  /* Set statement_timestamp() */
4723 
4724  /*
4725  * this message is complex enough that it seems best to put
4726  * the field extraction out-of-line
4727  */
4728  exec_bind_message(&input_message);
4729 
4730  /* exec_bind_message does valgrind_report_error_query */
4731  break;
4732 
4733  case PqMsg_Execute:
4734  {
4735  const char *portal_name;
4736  int max_rows;
4737 
4738  forbidden_in_wal_sender(firstchar);
4739 
4740  /* Set statement_timestamp() */
4742 
4743  portal_name = pq_getmsgstring(&input_message);
4744  max_rows = pq_getmsgint(&input_message, 4);
4745  pq_getmsgend(&input_message);
4746 
4747  exec_execute_message(portal_name, max_rows);
4748 
4749  /* exec_execute_message does valgrind_report_error_query */
4750  }
4751  break;
4752 
4753  case PqMsg_FunctionCall:
4754  forbidden_in_wal_sender(firstchar);
4755 
4756  /* Set statement_timestamp() */
4758 
4759  /* Report query to various monitoring facilities. */
4761  set_ps_display("<FASTPATH>");
4762 
4763  /* start an xact for this function invocation */
4765 
4766  /*
4767  * Note: we may at this point be inside an aborted
4768  * transaction. We can't throw error for that until we've
4769  * finished reading the function-call message, so
4770  * HandleFunctionRequest() must check for it after doing so.
4771  * Be careful not to do anything that assumes we're inside a
4772  * valid transaction here.
4773  */
4774 
4775  /* switch back to message context */
4777 
4778  HandleFunctionRequest(&input_message);
4779 
4780  /* commit the function-invocation transaction */
4782 
4783  valgrind_report_error_query("fastpath function call");
4784 
4785  send_ready_for_query = true;
4786  break;
4787 
4788  case PqMsg_Close:
4789  {
4790  int close_type;
4791  const char *close_target;
4792 
4793  forbidden_in_wal_sender(firstchar);
4794 
4795  close_type = pq_getmsgbyte(&input_message);
4796  close_target = pq_getmsgstring(&input_message);
4797  pq_getmsgend(&input_message);
4798 
4799  switch (close_type)
4800  {
4801  case 'S':
4802  if (close_target[0] != '\0')
4803  DropPreparedStatement(close_target, false);
4804  else
4805  {
4806  /* special-case the unnamed statement */
4808  }
4809  break;
4810  case 'P':
4811  {
4812  Portal portal;
4813 
4814  portal = GetPortalByName(close_target);
4815  if (PortalIsValid(portal))
4816  PortalDrop(portal, false);
4817  }
4818  break;
4819  default:
4820  ereport(ERROR,
4821  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4822  errmsg("invalid CLOSE message subtype %d",
4823  close_type)));
4824  break;
4825  }
4826 
4829 
4830  valgrind_report_error_query("CLOSE message");
4831  }
4832  break;
4833 
4834  case PqMsg_Describe:
4835  {
4836  int describe_type;
4837  const char *describe_target;
4838 
4839  forbidden_in_wal_sender(firstchar);
4840 
4841  /* Set statement_timestamp() (needed for xact) */
4843 
4844  describe_type = pq_getmsgbyte(&input_message);
4845  describe_target = pq_getmsgstring(&input_message);
4846  pq_getmsgend(&input_message);
4847 
4848  switch (describe_type)
4849  {
4850  case 'S':
4851  exec_describe_statement_message(describe_target);
4852  break;
4853  case 'P':
4854  exec_describe_portal_message(describe_target);
4855  break;
4856  default:
4857  ereport(ERROR,
4858  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4859  errmsg("invalid DESCRIBE message subtype %d",
4860  describe_type)));
4861  break;
4862  }
4863 
4864  valgrind_report_error_query("DESCRIBE message");
4865  }
4866  break;
4867 
4868  case PqMsg_Flush:
4869  pq_getmsgend(&input_message);
4871  pq_flush();
4872  break;
4873 
4874  case PqMsg_Sync:
4875  pq_getmsgend(&input_message);
4877  valgrind_report_error_query("SYNC message");
4878  send_ready_for_query = true;
4879  break;
4880 
4881  /*
4882  * 'X' means that the frontend is closing down the socket. EOF
4883  * means unexpected loss of frontend connection. Either way,
4884  * perform normal shutdown.
4885  */
4886  case EOF:
4887 
4888  /* for the cumulative statistics system */
4890 
4891  /* FALLTHROUGH */
4892 
4893  case PqMsg_Terminate:
4894 
4895  /*
4896  * Reset whereToSendOutput to prevent ereport from attempting
4897  * to send any more messages to client.
4898  */
4901 
4902  /*
4903  * NOTE: if you are tempted to add more code here, DON'T!
4904  * Whatever you had in mind to do should be set up as an
4905  * on_proc_exit or on_shmem_exit callback, instead. Otherwise
4906  * it will fail to be called during other backend-shutdown
4907  * scenarios.
4908  */
4909  proc_exit(0);
4910 
4911  case PqMsg_CopyData:
4912  case PqMsg_CopyDone:
4913  case PqMsg_CopyFail:
4914 
4915  /*
4916  * Accept but ignore these messages, per protocol spec; we
4917  * probably got here because a COPY failed, and the frontend
4918  * is still sending data.
4919  */
4920  break;
4921 
4922  default:
4923  ereport(FATAL,
4924  (errcode(ERRCODE_PROTOCOL_VIOLATION),
4925  errmsg("invalid frontend message type %d",
4926  firstchar)));
4927  }
4928  } /* end of input-reading loop */
4929 }
void ProcessNotifyInterrupt(bool flush)
Definition: async.c:1834
volatile sig_atomic_t notifyInterruptPending
Definition: async.c:413
void DropPreparedStatement(const char *stmt_name, bool showError)
Definition: prepare.c:516
sigset_t UnBlockSig
Definition: pqsignal.c:22
void pgstat_report_activity(BackendState state, const char *cmd_str)
@ STATE_IDLEINTRANSACTION_ABORTED
@ STATE_IDLE
@ STATE_IDLEINTRANSACTION
@ STATE_FASTPATH
signed int int32
Definition: c.h:494
void ReadyForQuery(CommandDest dest)
Definition: dest.c:256
@ DestDebug
Definition: dest.h:88
@ DestNone
Definition: dest.h:87
void EmitErrorReport(void)
Definition: elog.c:1670
ErrorContextCallback * error_context_stack
Definition: elog.c:94
void FlushErrorState(void)
Definition: elog.c:1834
sigjmp_buf * PG_exception_stack
Definition: elog.c:96
#define FATAL
Definition: elog.h:41
void EventTriggerOnLogin(void)
void HandleFunctionRequest(StringInfo msgBuf)
Definition: fastpath.c:189
#define palloc_array(type, count)
Definition: fe_memutils.h:64
int32 MyCancelKey
Definition: globals.c:50
int MyProcPid
Definition: globals.c:45
bool IsUnderPostmaster
Definition: globals.c:117
volatile sig_atomic_t QueryCancelPending
Definition: globals.c:31
Oid MyDatabaseId
Definition: globals.c:91
void BeginReportingGUCOptions(void)
Definition: guc.c:2548
void ReportChangedGUCOptions(void)
Definition: guc.c:2598
@ PGC_SIGHUP
Definition: guc.h:71
void ProcessConfigFile(GucContext context)
volatile sig_atomic_t ConfigReloadPending
Definition: interrupt.c:27
void SignalHandlerForConfigReload(SIGNAL_ARGS)
Definition: interrupt.c:61
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:309
void proc_exit(int code)
Definition: ipc.c:104
void jit_reset_after_error(void)
Definition: jit.c:127
#define pq_flush()
Definition: libpq.h:46
#define pq_comm_reset()
Definition: libpq.h:45
MemoryContext MessageContext
Definition: mcxt.c:153
void MemoryContextReset(MemoryContext context)
Definition: mcxt.c:383
MemoryContext TopMemoryContext
Definition: mcxt.c:149
MemoryContext PostmasterContext
Definition: mcxt.c:151
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:454
#define AllocSetContextCreate
Definition: memutils.h:129
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:160
#define RESUME_INTERRUPTS()
Definition: miscadmin.h:135
@ NormalProcessing
Definition: miscadmin.h:449
@ InitProcessing
Definition: miscadmin.h:448
#define INIT_PG_LOAD_SESSION_LIBS
Definition: miscadmin.h:476
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:122
#define HOLD_INTERRUPTS()
Definition: miscadmin.h:133
#define SetProcessingMode(mode)
Definition: miscadmin.h:460
static char * buf
Definition: pg_test_fsync.c:73
const char * username
Definition: pgbench.c:296
long pgstat_report_stat(bool force)
Definition: pgstat.c:579
@ DISCONNECT_CLIENT_EOF
Definition: pgstat.h:80
void pgstat_report_connect(Oid dboid)
pqsigfunc pqsignal(int signo, pqsigfunc func)
#define printf(...)
Definition: port.h:244
#define PortalIsValid(p)
Definition: portal.h:212
void PortalDrop(Portal portal, bool isTopCommit)
Definition: portalmem.c:468
Portal GetPortalByName(const char *name)
Definition: portalmem.c:130
void PortalErrorCleanup(void)
Definition: portalmem.c:917
static void exec_describe_statement_message(const char *stmt_name)
Definition: postgres.c:2597
void quickdie(SIGNAL_ARGS)
Definition: postgres.c:2875
static void log_disconnections(int code, Datum arg)
Definition: postgres.c:5109
static void forbidden_in_wal_sender(char firstchar)
Definition: postgres.c:4939
static void exec_execute_message(const char *portal_name, long max_rows)
Definition: postgres.c:2085
void FloatExceptionHandler(SIGNAL_ARGS)
Definition: postgres.c:3019
void StatementCancelHandler(SIGNAL_ARGS)
Definition: postgres.c:3002
static bool ignore_till_sync
Definition: postgres.c:151
static void finish_xact_command(void)
Definition: postgres.c:2771
const char * debug_query_string
Definition: postgres.c:87
static void exec_simple_query(const char *query_string)
Definition: postgres.c:1013
static void exec_parse_message(const char *query_string, const char *stmt_name, Oid *paramTypes, int numParams)
Definition: postgres.c:1391
static void exec_bind_message(StringInfo input_message)
Definition: postgres.c:1626
void die(SIGNAL_ARGS)
Definition: postgres.c:2972
static bool xact_started
Definition: postgres.c:137
static MemoryContext row_description_context
Definition: postgres.c:170
static StringInfoData row_description_buf
Definition: postgres.c:171
static bool doing_extended_query_message
Definition: postgres.c:150
static void start_xact_command(void)
Definition: postgres.c:2743
static void exec_describe_portal_message(const char *portal_name)
Definition: postgres.c:2691
bool Log_disconnections
Definition: postgres.c:93
static void drop_unnamed_stmt(void)
Definition: postgres.c:2850
#define valgrind_report_error_query(query)
Definition: postgres.c:224
static int ReadCommand(StringInfo inBuf)
Definition: postgres.c:488
void BaseInit(void)
Definition: postinit.c:645
void InitPostgres(const char *in_dbname, Oid dboid, const char *username, Oid useroid, bits32 flags, char *out_dbname)
Definition: postinit.c:736
bool pq_is_reading_msg(void)
Definition: pqcomm.c:1180
unsigned int pq_getmsgint(StringInfo msg, int b)
Definition: pqformat.c:415
const char * pq_getmsgstring(StringInfo msg)
Definition: pqformat.c:579
void pq_getmsgend(StringInfo msg)
Definition: pqformat.c:635
void pq_putemptymessage(char msgtype)
Definition: pqformat.c:388
void pq_endmessage(StringInfo buf)
Definition: pqformat.c:296
int pq_getmsgbyte(StringInfo msg)
Definition: pqformat.c:399
void pq_beginmessage(StringInfo buf, char msgtype)
Definition: pqformat.c:88
static void pq_sendint32(StringInfo buf, uint32 i)
Definition: pqformat.h:144
void procsignal_sigusr1_handler(SIGNAL_ARGS)
Definition: procsignal.c:635
#define PqMsg_CloseComplete
Definition: protocol.h:40
#define PqMsg_CopyDone
Definition: protocol.h:64
#define PqMsg_CopyData
Definition: protocol.h:65
#define PqMsg_FunctionCall
Definition: protocol.h:23
#define PqMsg_Describe
Definition: protocol.h:21
#define PqMsg_Parse
Definition: protocol.h:25
#define PqMsg_Bind
Definition: protocol.h:19
#define PqMsg_Sync
Definition: protocol.h:27
#define PqMsg_CopyFail
Definition: protocol.h:29
#define PqMsg_Flush
Definition: protocol.h:24
#define PqMsg_BackendKeyData
Definition: protocol.h:48
#define PqMsg_Query
Definition: protocol.h:26
#define PqMsg_Terminate
Definition: protocol.h:28
#define PqMsg_Execute
Definition: protocol.h:22
#define PqMsg_Close
Definition: protocol.h:20
static void set_ps_display(const char *activity)
Definition: ps_status.h:40
MemoryContextSwitchTo(old_ctx)
ReplicationSlot * MyReplicationSlot
Definition: slot.c:138
void ReplicationSlotRelease(void)
Definition: slot.c:652
void ReplicationSlotCleanup(bool synced_only)
Definition: slot.c:745
void InvalidateCatalogSnapshotConditionally(void)
Definition: snapmgr.c:443
int IdleSessionTimeout
Definition: proc.c:62
int IdleInTransactionSessionTimeout
Definition: proc.c:60
int TransactionTimeout
Definition: proc.c:61
char * dbname
Definition: streamutil.c:52
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
void enable_timeout_after(TimeoutId id, int delay_ms)
Definition: timeout.c:560
bool get_timeout_active(TimeoutId id)
Definition: timeout.c:780
void disable_all_timeouts(bool keep_indicators)
Definition: timeout.c:751
void InitializeTimeouts(void)
Definition: timeout.c:470
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:685
@ IDLE_SESSION_TIMEOUT
Definition: timeout.h:35
@ IDLE_IN_TRANSACTION_SESSION_TIMEOUT
Definition: timeout.h:33
@ IDLE_STATS_UPDATE_TIMEOUT
Definition: timeout.h:36
void WalSndErrorCleanup(void)
Definition: walsender.c:327
bool am_walsender
Definition: walsender.c:115
bool exec_replication_command(const char *cmd_string)
Definition: walsender.c:1977
void WalSndSignals(void)
Definition: walsender.c:3590
void InitWalSender(void)
#define SIGCHLD
Definition: win32_port.h:178
#define SIGHUP
Definition: win32_port.h:168
#define SIG_DFL
Definition: win32_port.h:163
#define SIGPIPE
Definition: win32_port.h:173
#define SIGQUIT
Definition: win32_port.h:169
#define SIGUSR1
Definition: win32_port.h:180
#define SIGUSR2
Definition: win32_port.h:181
#define SIG_IGN
Definition: win32_port.h:165
bool IsTransactionOrTransactionBlock(void)
Definition: xact.c:4933
bool IsAbortedTransactionBlockState(void)
Definition: xact.c:404
void SetCurrentStatementStartTimestamp(void)
Definition: xact.c:911
void AbortCurrentTransaction(void)
Definition: xact.c:3387

References AbortCurrentTransaction(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, am_walsender, Assert, BaseInit(), BeginReportingGUCOptions(), buf, CHECK_FOR_INTERRUPTS, ConfigReloadPending, dbname, debug_query_string, DestDebug, DestNone, DestRemote, die(), disable_all_timeouts(), disable_timeout(), DISCONNECT_CLIENT_EOF, doing_extended_query_message, DoingCommandRead, drop_unnamed_stmt(), DropPreparedStatement(), EmitErrorReport(), enable_timeout_after(), ereport, errcode(), errmsg(), ERROR, error_context_stack, EventTriggerOnLogin(), 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(), get_timeout_active(), GetPortalByName(), HandleFunctionRequest(), HOLD_INTERRUPTS, i, IDLE_IN_TRANSACTION_SESSION_TIMEOUT, IDLE_SESSION_TIMEOUT, IDLE_STATS_UPDATE_TIMEOUT, IdleInTransactionSessionTimeout, IdleSessionTimeout, ignore_till_sync, INIT_PG_LOAD_SESSION_LIBS, InitializeTimeouts(), InitPostgres(), InitProcessing, initStringInfo(), InitWalSender(), InvalidateCatalogSnapshotConditionally(), InvalidOid, IsAbortedTransactionBlockState(), IsTransactionOrTransactionBlock(), IsUnderPostmaster, jit_reset_after_error(), Log_disconnections, log_disconnections(), MemoryContextDelete(), MemoryContextReset(), MemoryContextSwitchTo(), MessageContext, MyCancelKey, MyDatabaseId, MyProcPid, MyReplicationSlot, NormalProcessing, notifyInterruptPending, on_proc_exit(), palloc_array, PG_exception_stack, PGC_SIGHUP, pgstat_report_activity(), pgstat_report_connect(), pgstat_report_stat(), pgStatSessionEndCause, PortalDrop(), PortalErrorCleanup(), 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_sendint32(), PqMsg_BackendKeyData, PqMsg_Bind, PqMsg_Close, PqMsg_CloseComplete, PqMsg_CopyData, PqMsg_CopyDone, PqMsg_CopyFail, PqMsg_Describe, PqMsg_Execute, PqMsg_Flush, PqMsg_FunctionCall, PqMsg_Parse, PqMsg_Query, PqMsg_Sync, PqMsg_Terminate, pqsignal(), printf, proc_exit(), ProcessConfigFile(), ProcessNotifyInterrupt(), procsignal_sigusr1_handler(), QueryCancelPending, quickdie(), ReadCommand(), ReadyForQuery(), ReplicationSlotCleanup(), ReplicationSlotRelease(), ReportChangedGUCOptions(), RESUME_INTERRUPTS, row_description_buf, row_description_context, set_ps_display(), SetCurrentStatementStartTimestamp(), SetProcessingMode, SIG_DFL, SIG_IGN, SIGCHLD, SIGHUP, SignalHandlerForConfigReload(), SIGPIPE, SIGQUIT, SIGUSR1, SIGUSR2, start_xact_command(), STATE_FASTPATH, STATE_IDLE, STATE_IDLEINTRANSACTION, STATE_IDLEINTRANSACTION_ABORTED, StatementCancelHandler(), TopMemoryContext, TransactionTimeout, UnBlockSig, username, valgrind_report_error_query, WalSndErrorCleanup(), WalSndSignals(), whereToSendOutput, and xact_started.

Referenced by BackendMain(), and PostgresSingleUserMain().

◆ PostgresSingleUserMain()

void PostgresSingleUserMain ( int  argc,
char *  argv[],
const char *  username 
)

Definition at line 4042 of file postgres.c.

4044 {
4045  const char *dbname = NULL;
4046 
4048 
4049  /* Initialize startup process environment. */
4050  InitStandaloneProcess(argv[0]);
4051 
4052  /*
4053  * Set default values for command-line options.
4054  */
4056 
4057  /*
4058  * Parse command-line options.
4059  */
4061 
4062  /* Must have gotten a database name, or have a default (the username) */
4063  if (dbname == NULL)
4064  {
4065  dbname = username;
4066  if (dbname == NULL)
4067  ereport(FATAL,
4068  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4069  errmsg("%s: no database nor user name specified",
4070  progname)));
4071  }
4072 
4073  /* Acquire configuration parameters */
4075  proc_exit(1);
4076 
4077  /*
4078  * Validate we have been given a reasonable-looking DataDir and change
4079  * into it.
4080  */
4081  checkDataDir();
4082  ChangeToDataDir();
4083 
4084  /*
4085  * Create lockfile for data directory.
4086  */
4087  CreateDataDirLockFile(false);
4088 
4089  /* read control file (error checking and contains config ) */
4090  LocalProcessControlFile(false);
4091 
4092  /*
4093  * process any libraries that should be preloaded at postmaster start
4094  */
4096 
4097  /* Initialize MaxBackends */
4099 
4100  /*
4101  * Give preloaded libraries a chance to request additional shared memory.
4102  */
4104 
4105  /*
4106  * Now that loadable modules have had their chance to request additional
4107  * shared memory, determine the value of any runtime-computed GUCs that
4108  * depend on the amount of shared memory required.
4109  */
4111 
4112  /*
4113  * Now that modules have been loaded, we can process any custom resource
4114  * managers specified in the wal_consistency_checking GUC.
4115  */
4117 
4119 
4120  /*
4121  * Remember stand-alone backend startup time,roughly at the same point
4122  * during startup that postmaster does so.
4123  */
4125 
4126  /*
4127  * Create a per-backend PGPROC struct in shared memory. We must do this
4128  * before we can use LWLocks.
4129  */
4130  InitProcess();
4131 
4132  /*
4133  * Now that sufficient infrastructure has been initialized, PostgresMain()
4134  * can do the rest.
4135  */
4137 }
TimestampTz PgStartTime
Definition: timestamp.c:52
bool SelectConfigFiles(const char *userDoption, const char *progname)
Definition: guc.c:1786
void InitializeGUCOptions(void)
Definition: guc.c:1532
@ PGC_POSTMASTER
Definition: guc.h:70
void InitializeShmemGUCs(void)
Definition: ipci.c:369
void CreateSharedMemoryAndSemaphores(void)
Definition: ipci.c:199
const char * progname
Definition: main.c:44
void ChangeToDataDir(void)
Definition: miscinit.c:454
void process_shmem_requests(void)
Definition: miscinit.c:1871
void InitStandaloneProcess(const char *argv0)
Definition: miscinit.c:181
void process_shared_preload_libraries(void)
Definition: miscinit.c:1843
void checkDataDir(void)
Definition: miscinit.c:341
void CreateDataDirLockFile(bool amPostmaster)
Definition: miscinit.c:1455
void process_postgres_switches(int argc, char *argv[], GucContext ctx, const char **dbname)
Definition: postgres.c:3790
static const char * userDoption
Definition: postgres.c:161
void PostgresMain(const char *dbname, const char *username)
Definition: postgres.c:4152
void InitializeMaxBackends(void)
Definition: postinit.c:575
void InitProcess(void)
Definition: proc.c:296
void InitializeWalConsistencyChecking(void)
Definition: xlog.c:4751
void LocalProcessControlFile(bool reset)
Definition: xlog.c:4813

References Assert, ChangeToDataDir(), checkDataDir(), CreateDataDirLockFile(), CreateSharedMemoryAndSemaphores(), dbname, ereport, errcode(), errmsg(), FATAL, GetCurrentTimestamp(), InitializeGUCOptions(), InitializeMaxBackends(), InitializeShmemGUCs(), InitializeWalConsistencyChecking(), InitProcess(), InitStandaloneProcess(), IsUnderPostmaster, LocalProcessControlFile(), PGC_POSTMASTER, PgStartTime, PostgresMain(), proc_exit(), process_postgres_switches(), process_shared_preload_libraries(), process_shmem_requests(), progname, SelectConfigFiles(), userDoption, and username.

Referenced by main().

◆ process_postgres_switches()

void process_postgres_switches ( int  argc,
char *  argv[],
GucContext  ctx,
const char **  dbname 
)

Definition at line 3790 of file postgres.c.

3792 {
3793  bool secure = (ctx == PGC_POSTMASTER);
3794  int errs = 0;
3795  GucSource gucsource;
3796  int flag;
3797 
3798  if (secure)
3799  {
3800  gucsource = PGC_S_ARGV; /* switches came from command line */
3801 
3802  /* Ignore the initial --single argument, if present */
3803  if (argc > 1 && strcmp(argv[1], "--single") == 0)
3804  {
3805  argv++;
3806  argc--;
3807  }
3808  }
3809  else
3810  {
3811  gucsource = PGC_S_CLIENT; /* switches came from client */
3812  }
3813 
3814 #ifdef HAVE_INT_OPTERR
3815 
3816  /*
3817  * Turn this off because it's either printed to stderr and not the log
3818  * where we'd want it, or argv[0] is now "--single", which would make for
3819  * a weird error message. We print our own error message below.
3820  */
3821  opterr = 0;
3822 #endif
3823 
3824  /*
3825  * Parse command-line options. CAUTION: keep this in sync with
3826  * postmaster/postmaster.c (the option sets should not conflict) and with
3827  * the common help() function in main/main.c.
3828  */
3829  while ((flag = getopt(argc, argv, "B:bC:c:D:d:EeFf:h:ijk:lN:nOPp:r:S:sTt:v:W:-:")) != -1)
3830  {
3831  switch (flag)
3832  {
3833  case 'B':
3834  SetConfigOption("shared_buffers", optarg, ctx, gucsource);
3835  break;
3836 
3837  case 'b':
3838  /* Undocumented flag used for binary upgrades */
3839  if (secure)
3840  IsBinaryUpgrade = true;
3841  break;
3842 
3843  case 'C':
3844  /* ignored for consistency with the postmaster */
3845  break;
3846 
3847  case 'c':
3848  case '-':
3849  {
3850  char *name,
3851  *value;
3852 
3854  if (!value)
3855  {
3856  if (flag == '-')
3857  ereport(ERROR,
3858  (errcode(ERRCODE_SYNTAX_ERROR),
3859  errmsg("--%s requires a value",
3860  optarg)));
3861  else
3862  ereport(ERROR,
3863  (errcode(ERRCODE_SYNTAX_ERROR),
3864  errmsg("-c %s requires a value",
3865  optarg)));
3866  }
3867  SetConfigOption(name, value, ctx, gucsource);
3868  pfree(name);
3869  pfree(value);
3870  break;
3871  }
3872 
3873  case 'D':
3874  if (secure)
3875  userDoption = strdup(optarg);
3876  break;
3877 
3878  case 'd':
3879  set_debug_options(atoi(optarg), ctx, gucsource);
3880  break;
3881 
3882  case 'E':
3883  if (secure)
3884  EchoQuery = true;
3885  break;
3886 
3887  case 'e':
3888  SetConfigOption("datestyle", "euro", ctx, gucsource);
3889  break;
3890 
3891  case 'F':
3892  SetConfigOption("fsync", "false", ctx, gucsource);
3893  break;
3894 
3895  case 'f':
3896  if (!set_plan_disabling_options(optarg, ctx, gucsource))
3897  errs++;
3898  break;
3899 
3900  case 'h':
3901  SetConfigOption("listen_addresses", optarg, ctx, gucsource);
3902  break;
3903 
3904  case 'i':
3905  SetConfigOption("listen_addresses", "*", ctx, gucsource);
3906  break;
3907 
3908  case 'j':
3909  if (secure)
3910  UseSemiNewlineNewline = true;
3911  break;
3912 
3913  case 'k':
3914  SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
3915  break;
3916 
3917  case 'l':
3918  SetConfigOption("ssl", "true", ctx, gucsource);
3919  break;
3920 
3921  case 'N':
3922  SetConfigOption("max_connections", optarg, ctx, gucsource);
3923  break;
3924 
3925  case 'n':
3926  /* ignored for consistency with postmaster */
3927  break;
3928 
3929  case 'O':
3930  SetConfigOption("allow_system_table_mods", "true", ctx, gucsource);
3931  break;
3932 
3933  case 'P':
3934  SetConfigOption("ignore_system_indexes", "true", ctx, gucsource);
3935  break;
3936 
3937  case 'p':
3938  SetConfigOption("port", optarg, ctx, gucsource);
3939  break;
3940 
3941  case 'r':
3942  /* send output (stdout and stderr) to the given file */
3943  if (secure)
3945  break;
3946 
3947  case 'S':
3948  SetConfigOption("work_mem", optarg, ctx, gucsource);
3949  break;
3950 
3951  case 's':
3952  SetConfigOption("log_statement_stats", "true", ctx, gucsource);
3953  break;
3954 
3955  case 'T':
3956  /* ignored for consistency with the postmaster */
3957  break;
3958 
3959  case 't':
3960  {
3961  const char *tmp = get_stats_option_name(optarg);
3962 
3963  if (tmp)
3964  SetConfigOption(tmp, "true", ctx, gucsource);
3965  else
3966  errs++;
3967  break;
3968  }
3969 
3970  case 'v':
3971 
3972  /*
3973  * -v is no longer used in normal operation, since
3974  * FrontendProtocol is already set before we get here. We keep
3975  * the switch only for possible use in standalone operation,
3976  * in case we ever support using normal FE/BE protocol with a
3977  * standalone backend.
3978  */
3979  if (secure)
3981  break;
3982 
3983  case 'W':
3984  SetConfigOption("post_auth_delay", optarg, ctx, gucsource);
3985  break;
3986 
3987  default:
3988  errs++;
3989  break;
3990  }
3991 
3992  if (errs)
3993  break;
3994  }
3995 
3996  /*
3997  * Optional database name should be there only if *dbname is NULL.
3998  */
3999  if (!errs && dbname && *dbname == NULL && argc - optind >= 1)
4000  *dbname = strdup(argv[optind++]);
4001 
4002  if (errs || argc != optind)
4003  {
4004  if (errs)
4005  optind--; /* complain about the previous argument */
4006 
4007  /* spell the error message a bit differently depending on context */
4008  if (IsUnderPostmaster)
4009  ereport(FATAL,
4010  errcode(ERRCODE_SYNTAX_ERROR),
4011  errmsg("invalid command-line argument for server process: %s", argv[optind]),
4012  errhint("Try \"%s --help\" for more information.", progname));
4013  else
4014  ereport(FATAL,
4015  errcode(ERRCODE_SYNTAX_ERROR),
4016  errmsg("%s: invalid command-line argument: %s",
4017  progname, argv[optind]),
4018  errhint("Try \"%s --help\" for more information.", progname));
4019  }
4020 
4021  /*
4022  * Reset getopt(3) library so that it will work correctly in subprocesses
4023  * or when this function is called a second time with another array.
4024  */
4025  optind = 1;
4026 #ifdef HAVE_INT_OPTRESET
4027  optreset = 1; /* some systems need this too */
4028 #endif
4029 }
int errhint(const char *fmt,...)
Definition: elog.c:1317
bool IsBinaryUpgrade
Definition: globals.c:118
ProtocolVersion FrontendProtocol
Definition: globals.c:28
char OutputFileName[MAXPGPATH]
Definition: globals.c:76
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:4285
void ParseLongOption(const char *string, char **name, char **value)
Definition: guc.c:6321
GucSource
Definition: guc.h:108
@ PGC_S_ARGV
Definition: guc.h:113
@ PGC_S_CLIENT
Definition: guc.h:118
static struct @155 value
#define MAXPGPATH
PGDLLIMPORT int optind
Definition: getopt.c:50
PGDLLIMPORT int opterr
Definition: getopt.c:49
int getopt(int nargc, char *const *nargv, const char *ostr)
Definition: getopt.c:71
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
void set_debug_options(int debug_flag, GucContext context, GucSource source)
Definition: postgres.c:3679
static bool UseSemiNewlineNewline
Definition: postgres.c:163
static bool EchoQuery
Definition: postgres.c:162
bool set_plan_disabling_options(const char *arg, GucContext context, GucSource source)
Definition: postgres.c:3708
const char * get_stats_option_name(const char *arg)
Definition: postgres.c:3750
uint32 ProtocolVersion
Definition: pqcomm.h:99
char * flag(int b)
Definition: test-ctype.c:33
const char * name

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

Referenced by PostgresSingleUserMain(), and process_startup_options().

◆ ProcessClientReadInterrupt()

void ProcessClientReadInterrupt ( bool  blocked)

Definition at line 509 of file postgres.c.

510 {
511  int save_errno = errno;
512 
513  if (DoingCommandRead)
514  {
515  /* Check for general interrupts that arrived before/while reading */
517 
518  /* Process sinval catchup interrupts, if any */
521 
522  /* Process notify interrupts, if any */
525  }
526  else if (ProcDiePending)
527  {
528  /*
529  * We're dying. If there is no data available to read, then it's safe
530  * (and sane) to handle that now. If we haven't tried to read yet,
531  * make sure the process latch is set, so that if there is no data
532  * then we'll come back here and die. If we're done reading, also
533  * make sure the process latch is set, as we might've undesirably
534  * cleared it while reading.
535  */
536  if (blocked)
538  else
539  SetLatch(MyLatch);
540  }
541 
542  errno = save_errno;
543 }
void ProcessCatchupInterrupt(void)
Definition: sinval.c:174
volatile sig_atomic_t catchupInterruptPending
Definition: sinval.c:39

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

Referenced by interactive_getc(), and secure_read().

◆ ProcessClientWriteInterrupt()

void ProcessClientWriteInterrupt ( bool  blocked)

Definition at line 555 of file postgres.c.

556 {
557  int save_errno = errno;
558 
559  if (ProcDiePending)
560  {
561  /*
562  * We're dying. If it's not possible to write, then we should handle
563  * that immediately, else a stuck client could indefinitely delay our
564  * response to the signal. If we haven't tried to write yet, make
565  * sure the process latch is set, so that if the write would block
566  * then we'll come back here and die. If we're done writing, also
567  * make sure the process latch is set, as we might've undesirably
568  * cleared it while writing.
569  */
570  if (blocked)
571  {
572  /*
573  * Don't mess with whereToSendOutput if ProcessInterrupts wouldn't
574  * service ProcDiePending.
575  */
576  if (InterruptHoldoffCount == 0 && CritSectionCount == 0)
577  {
578  /*
579  * We don't want to send the client the error message, as a)
580  * that would possibly block again, and b) it would likely
581  * lead to loss of protocol sync because we may have already
582  * sent a partial protocol message.
583  */
586 
588  }
589  }
590  else
591  SetLatch(MyLatch);
592  }
593 
594  errno = save_errno;
595 }
volatile uint32 InterruptHoldoffCount
Definition: globals.c:41
volatile uint32 CritSectionCount
Definition: globals.c:43

References CHECK_FOR_INTERRUPTS, CritSectionCount, DestNone, DestRemote, InterruptHoldoffCount, MyLatch, ProcDiePending, SetLatch(), and whereToSendOutput.

Referenced by secure_write().

◆ quickdie()

void quickdie ( SIGNAL_ARGS  )

Definition at line 2875 of file postgres.c.

2876 {
2877  sigaddset(&BlockSig, SIGQUIT); /* prevent nested calls */
2878  sigprocmask(SIG_SETMASK, &BlockSig, NULL);
2879 
2880  /*
2881  * Prevent interrupts while exiting; though we just blocked signals that
2882  * would queue new interrupts, one may have been pending. We don't want a
2883  * quickdie() downgraded to a mere query cancel.
2884  */
2885  HOLD_INTERRUPTS();
2886 
2887  /*
2888  * If we're aborting out of client auth, don't risk trying to send
2889  * anything to the client; we will likely violate the protocol, not to
2890  * mention that we may have interrupted the guts of OpenSSL or some
2891  * authentication library.
2892  */
2895 
2896  /*
2897  * Notify the client before exiting, to give a clue on what happened.
2898  *
2899  * It's dubious to call ereport() from a signal handler. It is certainly
2900  * not async-signal safe. But it seems better to try, than to disconnect
2901  * abruptly and leave the client wondering what happened. It's remotely
2902  * possible that we crash or hang while trying to send the message, but
2903  * receiving a SIGQUIT is a sign that something has already gone badly
2904  * wrong, so there's not much to lose. Assuming the postmaster is still
2905  * running, it will SIGKILL us soon if we get stuck for some reason.
2906  *
2907  * One thing we can do to make this a tad safer is to clear the error
2908  * context stack, so that context callbacks are not called. That's a lot
2909  * less code that could be reached here, and the context info is unlikely
2910  * to be very relevant to a SIGQUIT report anyway.
2911  */
2912  error_context_stack = NULL;
2913 
2914  /*
2915  * When responding to a postmaster-issued signal, we send the message only
2916  * to the client; sending to the server log just creates log spam, plus
2917  * it's more code that we need to hope will work in a signal handler.
2918  *
2919  * Ideally these should be ereport(FATAL), but then we'd not get control
2920  * back to force the correct type of process exit.
2921  */
2922  switch (GetQuitSignalReason())
2923  {
2924  case PMQUIT_NOT_SENT:
2925  /* Hmm, SIGQUIT arrived out of the blue */
2926  ereport(WARNING,
2927  (errcode(ERRCODE_ADMIN_SHUTDOWN),
2928  errmsg("terminating connection because of unexpected SIGQUIT signal")));
2929  break;
2930  case PMQUIT_FOR_CRASH:
2931  /* A crash-and-restart cycle is in progress */
2933  (errcode(ERRCODE_CRASH_SHUTDOWN),
2934  errmsg("terminating connection because of crash of another server process"),
2935  errdetail("The postmaster has commanded this server process to roll back"
2936  " the current transaction and exit, because another"
2937  " server process exited abnormally and possibly corrupted"
2938  " shared memory."),
2939  errhint("In a moment you should be able to reconnect to the"
2940  " database and repeat your command.")));
2941  break;
2942  case PMQUIT_FOR_STOP:
2943  /* Immediate-mode stop */
2945  (errcode(ERRCODE_ADMIN_SHUTDOWN),
2946  errmsg("terminating connection due to immediate shutdown command")));
2947  break;
2948  }
2949 
2950  /*
2951  * We DO NOT want to run proc_exit() or atexit() callbacks -- we're here
2952  * because shared memory may be corrupted, so we don't want to try to
2953  * clean up our transaction. Just nail the windows shut and get out of
2954  * town. The callbacks wouldn't be safe to run from a signal handler,
2955  * anyway.
2956  *
2957  * Note we do _exit(2) not _exit(0). This is to force the postmaster into
2958  * a system reset cycle if someone sends a manual SIGQUIT to a random
2959  * backend. This is necessary precisely because we don't clean up our
2960  * shared memory state. (The "dead man switch" mechanism in pmsignal.c
2961  * should ensure the postmaster sees this as a crash, too, but no harm in
2962  * being doubly sure.)
2963  */
2964  _exit(2);
2965 }
sigset_t BlockSig
Definition: pqsignal.c:23
#define WARNING_CLIENT_ONLY
Definition: elog.h:38
QuitSignalReason GetQuitSignalReason(void)
Definition: pmsignal.c:229
@ PMQUIT_FOR_STOP
Definition: pmsignal.h:54
@ PMQUIT_FOR_CRASH
Definition: pmsignal.h:53
@ PMQUIT_NOT_SENT
Definition: pmsignal.h:52
bool ClientAuthInProgress
Definition: postmaster.c:350

References BlockSig, ClientAuthInProgress, DestNone, DestRemote, ereport, errcode(), errdetail(), errhint(), errmsg(), error_context_stack, GetQuitSignalReason(), HOLD_INTERRUPTS, PMQUIT_FOR_CRASH, PMQUIT_FOR_STOP, PMQUIT_NOT_SENT, SIGQUIT, WARNING, WARNING_CLIENT_ONLY, and whereToSendOutput.

Referenced by PostgresMain().

◆ ResetUsage()

void ResetUsage ( void  )

◆ set_debug_options()

void set_debug_options ( int  debug_flag,
GucContext  context,
GucSource  source 
)

Definition at line 3679 of file postgres.c.

3680 {
3681  if (debug_flag > 0)
3682  {
3683  char debugstr[64];
3684 
3685  sprintf(debugstr, "debug%d", debug_flag);
3686  SetConfigOption("log_min_messages", debugstr, context, source);
3687  }
3688  else
3689  SetConfigOption("log_min_messages", "notice", context, source);
3690 
3691  if (debug_flag >= 1 && context == PGC_POSTMASTER)
3692  {
3693  SetConfigOption("log_connections", "true", context, source);
3694  SetConfigOption("log_disconnections", "true", context, source);
3695  }
3696  if (debug_flag >= 2)
3697  SetConfigOption("log_statement", "all", context, source);
3698  if (debug_flag >= 3)
3699  SetConfigOption("debug_print_parse", "true", context, source);
3700  if (debug_flag >= 4)
3701  SetConfigOption("debug_print_plan", "true", context, source);
3702  if (debug_flag >= 5)
3703  SetConfigOption("debug_print_rewritten", "true", context, source);
3704 }
static rewind_source * source
Definition: pg_rewind.c:89
#define sprintf
Definition: port.h:240
tree context
Definition: radixtree.h:1833

References context, PGC_POSTMASTER, SetConfigOption(), source, and sprintf.

Referenced by PostmasterMain(), and process_postgres_switches().

◆ set_plan_disabling_options()

bool set_plan_disabling_options ( const char *  arg,
GucContext  context,
GucSource  source 
)

Definition at line 3708 of file postgres.c.

3709 {
3710  const char *tmp = NULL;
3711 
3712  switch (arg[0])
3713  {
3714  case 's': /* seqscan */
3715  tmp = "enable_seqscan";
3716  break;
3717  case 'i': /* indexscan */
3718  tmp = "enable_indexscan";
3719  break;
3720  case 'o': /* indexonlyscan */
3721  tmp = "enable_indexonlyscan";
3722  break;
3723  case 'b': /* bitmapscan */
3724  tmp = "enable_bitmapscan";
3725  break;
3726  case 't': /* tidscan */
3727  tmp = "enable_tidscan";
3728  break;
3729  case 'n': /* nestloop */
3730  tmp = "enable_nestloop";
3731  break;
3732  case 'm': /* mergejoin */
3733  tmp = "enable_mergejoin";
3734  break;
3735  case 'h': /* hashjoin */
3736  tmp = "enable_hashjoin";
3737  break;
3738  }
3739  if (tmp)
3740  {
3741  SetConfigOption(tmp, "false", context, source);
3742  return true;
3743  }
3744  else
3745  return false;
3746 }

References arg, context, SetConfigOption(), and source.

Referenced by PostmasterMain(), and process_postgres_switches().

◆ ShowUsage()

void ShowUsage ( const char *  title)

Definition at line 5000 of file postgres.c.

5001 {
5003  struct timeval user,
5004  sys;
5005  struct timeval elapse_t;
5006  struct rusage r;
5007 
5008  getrusage(RUSAGE_SELF, &r);
5009  gettimeofday(&elapse_t, NULL);
5010  memcpy((char *) &user, (char *) &r.ru_utime, sizeof(user));
5011  memcpy((char *) &sys, (char *) &r.ru_stime, sizeof(sys));
5012  if (elapse_t.tv_usec < Save_t.tv_usec)
5013  {
5014  elapse_t.tv_sec--;
5015  elapse_t.tv_usec += 1000000;
5016  }
5017  if (r.ru_utime.tv_usec < Save_r.ru_utime.tv_usec)
5018  {
5019  r.ru_utime.tv_sec--;
5020  r.ru_utime.tv_usec += 1000000;
5021  }
5022  if (r.ru_stime.tv_usec < Save_r.ru_stime.tv_usec)
5023  {
5024  r.ru_stime.tv_sec--;
5025  r.ru_stime.tv_usec += 1000000;
5026  }
5027 
5028  /*
5029  * The only stats we don't show here are ixrss, idrss, isrss. It takes
5030  * some work to interpret them, and most platforms don't fill them in.
5031  */
5032  initStringInfo(&str);
5033 
5034  appendStringInfoString(&str, "! system usage stats:\n");
5036  "!\t%ld.%06ld s user, %ld.%06ld s system, %ld.%06ld s elapsed\n",
5037  (long) (r.ru_utime.tv_sec - Save_r.ru_utime.tv_sec),
5038  (long) (r.ru_utime.tv_usec - Save_r.ru_utime.tv_usec),
5039  (long) (r.ru_stime.tv_sec - Save_r.ru_stime.tv_sec),
5040  (long) (r.ru_stime.tv_usec - Save_r.ru_stime.tv_usec),
5041  (long) (elapse_t.tv_sec - Save_t.tv_sec),
5042  (long) (elapse_t.tv_usec - Save_t.tv_usec));
5044  "!\t[%ld.%06ld s user, %ld.%06ld s system total]\n",
5045  (long) user.tv_sec,
5046  (long) user.tv_usec,
5047  (long) sys.tv_sec,
5048  (long) sys.tv_usec);
5049 #ifndef WIN32
5050 
5051  /*
5052  * The following rusage fields are not defined by POSIX, but they're
5053  * present on all current Unix-like systems so we use them without any
5054  * special checks. Some of these could be provided in our Windows
5055  * emulation in src/port/win32getrusage.c with more work.
5056  */
5058  "!\t%ld kB max resident size\n",
5059 #if defined(__darwin__)
5060  /* in bytes on macOS */
5061  r.ru_maxrss / 1024
5062 #else
5063  /* in kilobytes on most other platforms */
5064  r.ru_maxrss
5065 #endif
5066  );
5068  "!\t%ld/%ld [%ld/%ld] filesystem blocks in/out\n",
5069  r.ru_inblock - Save_r.ru_inblock,
5070  /* they only drink coffee at dec */
5071  r.ru_oublock - Save_r.ru_oublock,
5072  r.ru_inblock, r.ru_oublock);
5074  "!\t%ld/%ld [%ld/%ld] page faults/reclaims, %ld [%ld] swaps\n",
5075  r.ru_majflt - Save_r.ru_majflt,
5076  r.ru_minflt - Save_r.ru_minflt,
5077  r.ru_majflt, r.ru_minflt,
5078  r.ru_nswap - Save_r.ru_nswap,
5079  r.ru_nswap);
5081  "!\t%ld [%ld] signals rcvd, %ld/%ld [%ld/%ld] messages rcvd/sent\n",
5082  r.ru_nsignals - Save_r.ru_nsignals,
5083  r.ru_nsignals,
5084  r.ru_msgrcv - Save_r.ru_msgrcv,
5085  r.ru_msgsnd - Save_r.ru_msgsnd,
5086  r.ru_msgrcv, r.ru_msgsnd);
5088  "!\t%ld/%ld [%ld/%ld] voluntary/involuntary context switches\n",
5089  r.ru_nvcsw - Save_r.ru_nvcsw,
5090  r.ru_nivcsw - Save_r.ru_nivcsw,
5091  r.ru_nvcsw, r.ru_nivcsw);
5092 #endif /* !WIN32 */
5093 
5094  /* remove trailing newline */
5095  if (str.data[str.len - 1] == '\n')
5096  str.data[--str.len] = '\0';
5097 
5098  ereport(LOG,
5099  (errmsg_internal("%s", title),
5100  errdetail_internal("%s", str.data)));
5101 
5102  pfree(str.data);
5103 }
#define __darwin__
Definition: darwin.h:3
int errmsg_internal(const char *fmt,...)
Definition: elog.c:1157
int errdetail_internal(const char *fmt,...)
Definition: elog.c:1230
static char * user
Definition: pg_regress.c:120
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:97
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:182
struct timeval ru_utime
Definition: resource.h:14
struct timeval ru_stime
Definition: resource.h:15

References __darwin__, appendStringInfo(), appendStringInfoString(), ereport, errdetail_internal(), errmsg_internal(), getrusage(), gettimeofday(), initStringInfo(), LOG, pfree(), rusage::ru_stime, rusage::ru_utime, RUSAGE_SELF, Save_r, Save_t, str, and user.

Referenced by _bt_leader_participate_as_worker(), _bt_leafbuild(), _bt_parallel_build_main(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite_fixedparams(), pg_analyze_and_rewrite_varparams(), pg_analyze_and_rewrite_withcb(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().

◆ StatementCancelHandler()

void StatementCancelHandler ( SIGNAL_ARGS  )

Definition at line 3002 of file postgres.c.

3003 {
3004  /*
3005  * Don't joggle the elbow of proc_exit
3006  */
3007  if (!proc_exit_inprogress)
3008  {
3009  InterruptPending = true;
3010  QueryCancelPending = true;
3011  }
3012 
3013  /* If we're still here, waken anything waiting on the process latch */
3014  SetLatch(MyLatch);
3015 }

References InterruptPending, MyLatch, proc_exit_inprogress, QueryCancelPending, and SetLatch().

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

Variable Documentation

◆ client_connection_check_interval

PGDLLIMPORT int client_connection_check_interval
extern

Definition at line 104 of file postgres.c.

Referenced by ProcessInterrupts(), and start_xact_command().

◆ debug_query_string

◆ log_statement

PGDLLIMPORT int log_statement
extern

Definition at line 95 of file postgres.c.

Referenced by check_log_statement(), and HandleFunctionRequest().

◆ max_stack_depth

PGDLLIMPORT int max_stack_depth
extern

Definition at line 98 of file postgres.c.

Referenced by check_stack_depth().

◆ PostAuthDelay

PGDLLIMPORT int PostAuthDelay
extern

Definition at line 101 of file postgres.c.

Referenced by AutoVacWorkerMain(), BackgroundWorkerMain(), and InitPostgres().

◆ whereToSendOutput