PostgreSQL Source Code  git master
fe-exec.c File Reference
#include "postgres_fe.h"
#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
#include <unistd.h>
#include "libpq-fe.h"
#include "libpq-int.h"
#include "mb/pg_wchar.h"
Include dependency graph for fe-exec.c:

Go to the source code of this file.

Macros

#define PGRESULT_DATA_BLOCKSIZE   2048
 
#define PGRESULT_ALIGN_BOUNDARY   MAXIMUM_ALIGNOF /* from configure */
 
#define PGRESULT_BLOCK_OVERHEAD   Max(sizeof(PGresult_data), PGRESULT_ALIGN_BOUNDARY)
 
#define PGRESULT_SEP_ALLOC_THRESHOLD   (PGRESULT_DATA_BLOCKSIZE / 2)
 
#define ISFIRSTOCTDIGIT(CH)   ((CH) >= '0' && (CH) <= '3')
 
#define ISOCTDIGIT(CH)   ((CH) >= '0' && (CH) <= '7')
 
#define OCTVAL(CH)   ((CH) - '0')
 

Functions

static PGEventdupEvents (PGEvent *events, int count, size_t *memSize)
 
static bool pqAddTuple (PGresult *res, PGresAttValue *tup, const char **errmsgp)
 
static int PQsendQueryInternal (PGconn *conn, const char *query, bool newQuery)
 
static bool PQsendQueryStart (PGconn *conn, bool newQuery)
 
static int PQsendQueryGuts (PGconn *conn, const char *command, const char *stmtName, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
static void parseInput (PGconn *conn)
 
static PGresultgetCopyResult (PGconn *conn, ExecStatusType copytype)
 
static bool PQexecStart (PGconn *conn)
 
static PGresultPQexecFinish (PGconn *conn)
 
static int PQsendTypedCommand (PGconn *conn, char command, char type, const char *target)
 
static int check_field_number (const PGresult *res, int field_num)
 
static void pqPipelineProcessQueue (PGconn *conn)
 
static int pqPipelineSyncInternal (PGconn *conn, bool immediate_flush)
 
static int pqPipelineFlush (PGconn *conn)
 
PGresultPQmakeEmptyPGresult (PGconn *conn, ExecStatusType status)
 
int PQsetResultAttrs (PGresult *res, int numAttributes, PGresAttDesc *attDescs)
 
PGresultPQcopyResult (const PGresult *src, int flags)
 
int PQsetvalue (PGresult *res, int tup_num, int field_num, char *value, int len)
 
void * PQresultAlloc (PGresult *res, size_t nBytes)
 
void * pqResultAlloc (PGresult *res, size_t nBytes, bool isBinary)
 
size_t PQresultMemorySize (const PGresult *res)
 
char * pqResultStrdup (PGresult *res, const char *str)
 
void pqSetResultError (PGresult *res, PQExpBuffer errorMessage, int offset)
 
void PQclear (PGresult *res)
 
void pqClearAsyncResult (PGconn *conn)
 
void pqSaveErrorResult (PGconn *conn)
 
static void pqSaveWriteError (PGconn *conn)
 
PGresultpqPrepareAsyncResult (PGconn *conn)
 
void pqInternalNotice (const PGNoticeHooks *hooks, const char *fmt,...)
 
void pqSaveMessageField (PGresult *res, char code, const char *value)
 
void pqSaveParameterStatus (PGconn *conn, const char *name, const char *value)
 
int pqRowProcessor (PGconn *conn, const char **errmsgp)
 
static PGcmdQueueEntrypqAllocCmdQueueEntry (PGconn *conn)
 
static void pqAppendCmdQueueEntry (PGconn *conn, PGcmdQueueEntry *entry)
 
static void pqRecycleCmdQueueEntry (PGconn *conn, PGcmdQueueEntry *entry)
 
int PQsendQuery (PGconn *conn, const char *query)
 
int PQsendQueryContinue (PGconn *conn, const char *query)
 
int PQsendQueryParams (PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
int PQsendPrepare (PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes)
 
int PQsendQueryPrepared (PGconn *conn, const char *stmtName, int nParams, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
static bool canChangeResultMode (PGconn *conn)
 
int PQsetSingleRowMode (PGconn *conn)
 
int PQsetChunkedRowsMode (PGconn *conn, int chunkSize)
 
int PQconsumeInput (PGconn *conn)
 
int PQisBusy (PGconn *conn)
 
PGresultPQgetResult (PGconn *conn)
 
PGresultPQexec (PGconn *conn, const char *query)
 
PGresultPQexecParams (PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
PGresultPQprepare (PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes)
 
PGresultPQexecPrepared (PGconn *conn, const char *stmtName, int nParams, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
PGresultPQdescribePrepared (PGconn *conn, const char *stmt)
 
PGresultPQdescribePortal (PGconn *conn, const char *portal)
 
int PQsendDescribePrepared (PGconn *conn, const char *stmt)
 
int PQsendDescribePortal (PGconn *conn, const char *portal)
 
PGresultPQclosePrepared (PGconn *conn, const char *stmt)
 
PGresultPQclosePortal (PGconn *conn, const char *portal)
 
int PQsendClosePrepared (PGconn *conn, const char *stmt)
 
int PQsendClosePortal (PGconn *conn, const char *portal)
 
PGnotifyPQnotifies (PGconn *conn)
 
int PQputCopyData (PGconn *conn, const char *buffer, int nbytes)
 
int PQputCopyEnd (PGconn *conn, const char *errormsg)
 
int PQgetCopyData (PGconn *conn, char **buffer, int async)
 
int PQgetline (PGconn *conn, char *buffer, int length)
 
int PQgetlineAsync (PGconn *conn, char *buffer, int bufsize)
 
int PQputline (PGconn *conn, const char *string)
 
int PQputnbytes (PGconn *conn, const char *buffer, int nbytes)
 
int PQendcopy (PGconn *conn)
 
PGresultPQfn (PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
 
int PQenterPipelineMode (PGconn *conn)
 
int PQexitPipelineMode (PGconn *conn)
 
void pqCommandQueueAdvance (PGconn *conn, bool isReadyForQuery, bool gotSync)
 
int PQpipelineSync (PGconn *conn)
 
int PQsendPipelineSync (PGconn *conn)
 
int PQsendFlushRequest (PGconn *conn)
 
ExecStatusType PQresultStatus (const PGresult *res)
 
char * PQresStatus (ExecStatusType status)
 
char * PQresultErrorMessage (const PGresult *res)
 
char * PQresultVerboseErrorMessage (const PGresult *res, PGVerbosity verbosity, PGContextVisibility show_context)
 
char * PQresultErrorField (const PGresult *res, int fieldcode)
 
int PQntuples (const PGresult *res)
 
int PQnfields (const PGresult *res)
 
int PQbinaryTuples (const PGresult *res)
 
static int check_tuple_field_number (const PGresult *res, int tup_num, int field_num)
 
static int check_param_number (const PGresult *res, int param_num)
 
char * PQfname (const PGresult *res, int field_num)
 
int PQfnumber (const PGresult *res, const char *field_name)
 
Oid PQftable (const PGresult *res, int field_num)
 
int PQftablecol (const PGresult *res, int field_num)
 
int PQfformat (const PGresult *res, int field_num)
 
Oid PQftype (const PGresult *res, int field_num)
 
int PQfsize (const PGresult *res, int field_num)
 
int PQfmod (const PGresult *res, int field_num)
 
char * PQcmdStatus (PGresult *res)
 
char * PQoidStatus (const PGresult *res)
 
Oid PQoidValue (const PGresult *res)
 
char * PQcmdTuples (PGresult *res)
 
char * PQgetvalue (const PGresult *res, int tup_num, int field_num)
 
int PQgetlength (const PGresult *res, int tup_num, int field_num)
 
int PQgetisnull (const PGresult *res, int tup_num, int field_num)
 
int PQnparams (const PGresult *res)
 
Oid PQparamtype (const PGresult *res, int param_num)
 
int PQsetnonblocking (PGconn *conn, int arg)
 
int PQisnonblocking (const PGconn *conn)
 
int PQisthreadsafe (void)
 
int PQflush (PGconn *conn)
 
void PQfreemem (void *ptr)
 
void PQfreeNotify (PGnotify *notify)
 
static size_t PQescapeStringInternal (PGconn *conn, char *to, const char *from, size_t length, int *error, int encoding, bool std_strings)
 
size_t PQescapeStringConn (PGconn *conn, char *to, const char *from, size_t length, int *error)
 
size_t PQescapeString (char *to, const char *from, size_t length)
 
static char * PQescapeInternal (PGconn *conn, const char *str, size_t len, bool as_ident)
 
char * PQescapeLiteral (PGconn *conn, const char *str, size_t len)
 
char * PQescapeIdentifier (PGconn *conn, const char *str, size_t len)
 
static char get_hex (char c)
 
static unsigned char * PQescapeByteaInternal (PGconn *conn, const unsigned char *from, size_t from_length, size_t *to_length, bool std_strings, bool use_hex)
 
unsigned char * PQescapeByteaConn (PGconn *conn, const unsigned char *from, size_t from_length, size_t *to_length)
 
unsigned char * PQescapeBytea (const unsigned char *from, size_t from_length, size_t *to_length)
 
unsigned char * PQunescapeBytea (const unsigned char *strtext, size_t *retbuflen)
 

Variables

char *const pgresStatus []
 
static const PGresult OOM_result
 
static int static_client_encoding = PG_SQL_ASCII
 
static bool static_std_strings = false
 
static const char hextbl [] = "0123456789abcdef"
 
static const int8 hexlookup [128]
 

Macro Definition Documentation

◆ ISFIRSTOCTDIGIT

#define ISFIRSTOCTDIGIT (   CH)    ((CH) >= '0' && (CH) <= '3')

Definition at line 4477 of file fe-exec.c.

◆ ISOCTDIGIT

#define ISOCTDIGIT (   CH)    ((CH) >= '0' && (CH) <= '7')

Definition at line 4478 of file fe-exec.c.

◆ OCTVAL

#define OCTVAL (   CH)    ((CH) - '0')

Definition at line 4479 of file fe-exec.c.

◆ PGRESULT_ALIGN_BOUNDARY

#define PGRESULT_ALIGN_BOUNDARY   MAXIMUM_ALIGNOF /* from configure */

Definition at line 143 of file fe-exec.c.

◆ PGRESULT_BLOCK_OVERHEAD

#define PGRESULT_BLOCK_OVERHEAD   Max(sizeof(PGresult_data), PGRESULT_ALIGN_BOUNDARY)

Definition at line 144 of file fe-exec.c.

◆ PGRESULT_DATA_BLOCKSIZE

#define PGRESULT_DATA_BLOCKSIZE   2048

Definition at line 142 of file fe-exec.c.

◆ PGRESULT_SEP_ALLOC_THRESHOLD

#define PGRESULT_SEP_ALLOC_THRESHOLD   (PGRESULT_DATA_BLOCKSIZE / 2)

Definition at line 145 of file fe-exec.c.

Function Documentation

◆ canChangeResultMode()

static bool canChangeResultMode ( PGconn conn)
static

Definition at line 1925 of file fe-exec.c.

1926 {
1927  /*
1928  * Only allow changing the mode when we have launched a query and not yet
1929  * received any results.
1930  */
1931  if (!conn)
1932  return false;
1933  if (conn->asyncStatus != PGASYNC_BUSY)
1934  return false;
1935  if (!conn->cmd_queue_head ||
1938  return false;
1940  return false;
1941  return true;
1942 }
@ PGASYNC_BUSY
Definition: libpq-int.h:222
@ PGQUERY_SIMPLE
Definition: libpq-int.h:326
@ PGQUERY_EXTENDED
Definition: libpq-int.h:327
#define pgHavePendingResult(conn)
Definition: libpq-int.h:893
PGconn * conn
Definition: streamutil.c:55
PGQueryClass queryclass
Definition: libpq-int.h:339
PGAsyncStatusType asyncStatus
Definition: libpq-int.h:437
PGcmdQueueEntry * cmd_queue_head
Definition: libpq-int.h:463

References pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, PGASYNC_BUSY, pgHavePendingResult, PGQUERY_EXTENDED, PGQUERY_SIMPLE, and PGcmdQueueEntry::queryclass.

Referenced by PQsetChunkedRowsMode(), and PQsetSingleRowMode().

◆ check_field_number()

static int check_field_number ( const PGresult res,
int  field_num 
)
static

Definition at line 3510 of file fe-exec.c.

3511 {
3512  if (!res)
3513  return false; /* no way to display error message... */
3514  if (field_num < 0 || field_num >= res->numAttributes)
3515  {
3517  "column number %d is out of range 0..%d",
3518  field_num, res->numAttributes - 1);
3519  return false;
3520  }
3521  return true;
3522 }
void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...)
Definition: fe-exec.c:938
PGNoticeHooks noticeHooks
Definition: libpq-int.h:189
int numAttributes
Definition: libpq-int.h:173

References pg_result::noticeHooks, pg_result::numAttributes, pqInternalNotice(), and res.

Referenced by PQfformat(), PQfmod(), PQfname(), PQfsize(), PQftable(), PQftablecol(), PQftype(), and PQsetvalue().

◆ check_param_number()

static int check_param_number ( const PGresult res,
int  param_num 
)
static

Definition at line 3548 of file fe-exec.c.

3549 {
3550  if (!res)
3551  return false; /* no way to display error message... */
3552  if (param_num < 0 || param_num >= res->numParameters)
3553  {
3555  "parameter number %d is out of range 0..%d",
3556  param_num, res->numParameters - 1);
3557  return false;
3558  }
3559 
3560  return true;
3561 }
int numParameters
Definition: libpq-int.h:178

References pg_result::noticeHooks, pg_result::numParameters, pqInternalNotice(), and res.

Referenced by PQparamtype().

◆ check_tuple_field_number()

static int check_tuple_field_number ( const PGresult res,
int  tup_num,
int  field_num 
)
static

Definition at line 3525 of file fe-exec.c.

3527 {
3528  if (!res)
3529  return false; /* no way to display error message... */
3530  if (tup_num < 0 || tup_num >= res->ntups)
3531  {
3533  "row number %d is out of range 0..%d",
3534  tup_num, res->ntups - 1);
3535  return false;
3536  }
3537  if (field_num < 0 || field_num >= res->numAttributes)
3538  {
3540  "column number %d is out of range 0..%d",
3541  field_num, res->numAttributes - 1);
3542  return false;
3543  }
3544  return true;
3545 }
int ntups
Definition: libpq-int.h:172

References pg_result::noticeHooks, pg_result::ntups, pg_result::numAttributes, pqInternalNotice(), and res.

Referenced by PQgetisnull(), PQgetlength(), and PQgetvalue().

◆ dupEvents()

static PGEvent * dupEvents ( PGEvent events,
int  count,
size_t *  memSize 
)
static

Definition at line 408 of file fe-exec.c.

409 {
410  PGEvent *newEvents;
411  size_t msize;
412  int i;
413 
414  if (!events || count <= 0)
415  return NULL;
416 
417  msize = count * sizeof(PGEvent);
418  newEvents = (PGEvent *) malloc(msize);
419  if (!newEvents)
420  return NULL;
421 
422  for (i = 0; i < count; i++)
423  {
424  newEvents[i].proc = events[i].proc;
425  newEvents[i].passThrough = events[i].passThrough;
426  newEvents[i].data = NULL;
427  newEvents[i].resultInitialized = false;
428  newEvents[i].name = strdup(events[i].name);
429  if (!newEvents[i].name)
430  {
431  while (--i >= 0)
432  free(newEvents[i].name);
433  free(newEvents);
434  return NULL;
435  }
436  msize += strlen(events[i].name) + 1;
437  }
438 
439  *memSize += msize;
440  return newEvents;
441 }
#define free(a)
Definition: header.h:65
#define malloc(a)
Definition: header.h:50
int i
Definition: isn.c:73
struct PGEvent PGEvent
void * passThrough
Definition: libpq-int.h:165
PGEventProc proc
Definition: libpq-int.h:163
const char * name

References PGEvent::data, free, i, malloc, name, PGEvent::name, PGEvent::passThrough, PGEvent::proc, and PGEvent::resultInitialized.

Referenced by PQcopyResult(), and PQmakeEmptyPGresult().

◆ get_hex()

static char get_hex ( char  c)
inlinestatic

Definition at line 4330 of file fe-exec.c.

4331 {
4332  int res = -1;
4333 
4334  if (c > 0 && c < 127)
4335  res = hexlookup[(unsigned char) c];
4336 
4337  return (char) res;
4338 }
static const int8 hexlookup[128]
Definition: fe-exec.c:4318
char * c

References hexlookup, and res.

Referenced by PQunescapeBytea().

◆ getCopyResult()

static PGresult * getCopyResult ( PGconn conn,
ExecStatusType  copytype 
)
static

Definition at line 2224 of file fe-exec.c.

2225 {
2226  /*
2227  * If the server connection has been lost, don't pretend everything is
2228  * hunky-dory; instead return a PGRES_FATAL_ERROR result, and reset the
2229  * asyncStatus to idle (corresponding to what we'd do if we'd detected I/O
2230  * error in the earlier steps in PQgetResult). The text returned in the
2231  * result is whatever is in conn->errorMessage; we hope that was filled
2232  * with something relevant when the lost connection was detected.
2233  */
2234  if (conn->status != CONNECTION_OK)
2235  {
2238  return pqPrepareAsyncResult(conn);
2239  }
2240 
2241  /* If we have an async result for the COPY, return that */
2242  if (conn->result && conn->result->resultStatus == copytype)
2243  return pqPrepareAsyncResult(conn);
2244 
2245  /* Otherwise, invent a suitable PGresult */
2246  return PQmakeEmptyPGresult(conn, copytype);
2247 }
void pqSaveErrorResult(PGconn *conn)
Definition: fe-exec.c:803
PGresult * PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
Definition: fe-exec.c:159
PGresult * pqPrepareAsyncResult(PGconn *conn)
Definition: fe-exec.c:851
@ CONNECTION_OK
Definition: libpq-fe.h:60
@ PGASYNC_IDLE
Definition: libpq-int.h:221
PGresult * result
Definition: libpq-int.h:552
ConnStatusType status
Definition: libpq-int.h:436
ExecStatusType resultStatus
Definition: libpq-int.h:180

References pg_conn::asyncStatus, conn, CONNECTION_OK, PGASYNC_IDLE, PQmakeEmptyPGresult(), pqPrepareAsyncResult(), pqSaveErrorResult(), pg_conn::result, pg_result::resultStatus, and pg_conn::status.

Referenced by PQgetResult().

◆ parseInput()

static void parseInput ( PGconn conn)
static

Definition at line 2020 of file fe-exec.c.

2021 {
2023 }
void pqParseInput3(PGconn *conn)
Definition: fe-protocol3.c:66

References conn, and pqParseInput3().

Referenced by PQgetResult(), PQisBusy(), PQnotifies(), and PQputCopyData().

◆ pqAddTuple()

static bool pqAddTuple ( PGresult res,
PGresAttValue tup,
const char **  errmsgp 
)
static

Definition at line 993 of file fe-exec.c.

994 {
995  if (res->ntups >= res->tupArrSize)
996  {
997  /*
998  * Try to grow the array.
999  *
1000  * We can use realloc because shallow copying of the structure is
1001  * okay. Note that the first time through, res->tuples is NULL. While
1002  * ANSI says that realloc() should act like malloc() in that case,
1003  * some old C libraries (like SunOS 4.1.x) coredump instead. On
1004  * failure realloc is supposed to return NULL without damaging the
1005  * existing allocation. Note that the positions beyond res->ntups are
1006  * garbage, not necessarily NULL.
1007  */
1008  int newSize;
1009  PGresAttValue **newTuples;
1010 
1011  /*
1012  * Since we use integers for row numbers, we can't support more than
1013  * INT_MAX rows. Make sure we allow that many, though.
1014  */
1015  if (res->tupArrSize <= INT_MAX / 2)
1016  newSize = (res->tupArrSize > 0) ? res->tupArrSize * 2 : 128;
1017  else if (res->tupArrSize < INT_MAX)
1018  newSize = INT_MAX;
1019  else
1020  {
1021  *errmsgp = libpq_gettext("PGresult cannot support more than INT_MAX tuples");
1022  return false;
1023  }
1024 
1025  /*
1026  * Also, on 32-bit platforms we could, in theory, overflow size_t even
1027  * before newSize gets to INT_MAX. (In practice we'd doubtless hit
1028  * OOM long before that, but let's check.)
1029  */
1030 #if INT_MAX >= (SIZE_MAX / 2)
1031  if (newSize > SIZE_MAX / sizeof(PGresAttValue *))
1032  {
1033  *errmsgp = libpq_gettext("size_t overflow");
1034  return false;
1035  }
1036 #endif
1037 
1038  if (res->tuples == NULL)
1039  newTuples = (PGresAttValue **)
1040  malloc(newSize * sizeof(PGresAttValue *));
1041  else
1042  newTuples = (PGresAttValue **)
1043  realloc(res->tuples, newSize * sizeof(PGresAttValue *));
1044  if (!newTuples)
1045  return false; /* malloc or realloc failed */
1046  res->memorySize +=
1047  (newSize - res->tupArrSize) * sizeof(PGresAttValue *);
1048  res->tupArrSize = newSize;
1049  res->tuples = newTuples;
1050  }
1051  res->tuples[res->ntups] = tup;
1052  res->ntups++;
1053  return true;
1054 }
#define realloc(a, b)
Definition: header.h:60
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
#define libpq_gettext(x)
Definition: libpq-int.h:911
size_t memorySize
Definition: libpq-int.h:215
PGresAttValue ** tuples
Definition: libpq-int.h:175
int tupArrSize
Definition: libpq-int.h:177

References if(), libpq_gettext, malloc, pg_result::memorySize, pg_result::ntups, realloc, res, pg_result::tupArrSize, and pg_result::tuples.

Referenced by pqRowProcessor(), and PQsetvalue().

◆ pqAllocCmdQueueEntry()

static PGcmdQueueEntry* pqAllocCmdQueueEntry ( PGconn conn)
static

Definition at line 1306 of file fe-exec.c.

1307 {
1308  PGcmdQueueEntry *entry;
1309 
1310  if (conn->cmd_queue_recycle == NULL)
1311  {
1312  entry = (PGcmdQueueEntry *) malloc(sizeof(PGcmdQueueEntry));
1313  if (entry == NULL)
1314  {
1315  libpq_append_conn_error(conn, "out of memory");
1316  return NULL;
1317  }
1318  }
1319  else
1320  {
1321  entry = conn->cmd_queue_recycle;
1322  conn->cmd_queue_recycle = entry->next;
1323  }
1324  entry->next = NULL;
1325  entry->query = NULL;
1326 
1327  return entry;
1328 }
void libpq_append_conn_error(PGconn *conn, const char *fmt,...)
Definition: fe-misc.c:1357
struct PGcmdQueueEntry * next
Definition: libpq-int.h:341
PGcmdQueueEntry * cmd_queue_recycle
Definition: libpq-int.h:470

References pg_conn::cmd_queue_recycle, conn, libpq_append_conn_error(), malloc, PGcmdQueueEntry::next, and PGcmdQueueEntry::query.

Referenced by pqPipelineSyncInternal(), PQsendPrepare(), PQsendQueryGuts(), PQsendQueryInternal(), and PQsendTypedCommand().

◆ pqAppendCmdQueueEntry()

static void pqAppendCmdQueueEntry ( PGconn conn,
PGcmdQueueEntry entry 
)
static

Definition at line 1339 of file fe-exec.c.

1340 {
1341  Assert(entry->next == NULL);
1342 
1343  if (conn->cmd_queue_head == NULL)
1344  conn->cmd_queue_head = entry;
1345  else
1346  conn->cmd_queue_tail->next = entry;
1347 
1348  conn->cmd_queue_tail = entry;
1349 
1350  switch (conn->pipelineStatus)
1351  {
1352  case PQ_PIPELINE_OFF:
1353  case PQ_PIPELINE_ON:
1354 
1355  /*
1356  * When not in pipeline aborted state, if there's a result ready
1357  * to be consumed, let it be so (that is, don't change away from
1358  * READY or READY_MORE); otherwise set us busy to wait for
1359  * something to arrive from the server.
1360  */
1361  if (conn->asyncStatus == PGASYNC_IDLE)
1363  break;
1364 
1365  case PQ_PIPELINE_ABORTED:
1366 
1367  /*
1368  * In aborted pipeline state, we don't expect anything from the
1369  * server (since we don't send any queries that are queued).
1370  * Therefore, if IDLE then do what PQgetResult would do to let
1371  * itself consume commands from the queue; if we're in any other
1372  * state, we don't have to do anything.
1373  */
1374  if (conn->asyncStatus == PGASYNC_IDLE ||
1377  break;
1378  }
1379 }
#define Assert(condition)
Definition: c.h:858
static void pqPipelineProcessQueue(PGconn *conn)
Definition: fe-exec.c:3180
@ PQ_PIPELINE_OFF
Definition: libpq-fe.h:161
@ PQ_PIPELINE_ABORTED
Definition: libpq-fe.h:163
@ PQ_PIPELINE_ON
Definition: libpq-fe.h:162
@ PGASYNC_PIPELINE_IDLE
Definition: libpq-int.h:231
PGcmdQueueEntry * cmd_queue_tail
Definition: libpq-int.h:464
PGpipelineStatus pipelineStatus
Definition: libpq-int.h:443

References Assert, pg_conn::asyncStatus, pg_conn::cmd_queue_head, pg_conn::cmd_queue_tail, conn, PGcmdQueueEntry::next, PGASYNC_BUSY, PGASYNC_IDLE, PGASYNC_PIPELINE_IDLE, pg_conn::pipelineStatus, PQ_PIPELINE_ABORTED, PQ_PIPELINE_OFF, PQ_PIPELINE_ON, and pqPipelineProcessQueue().

Referenced by pqPipelineSyncInternal(), PQsendPrepare(), PQsendQueryGuts(), PQsendQueryInternal(), and PQsendTypedCommand().

◆ PQbinaryTuples()

int PQbinaryTuples ( const PGresult res)

Definition at line 3497 of file fe-exec.c.

3498 {
3499  if (!res)
3500  return 0;
3501  return res->binary;
3502 }
int binary
Definition: libpq-int.h:182

References pg_result::binary, and res.

Referenced by HandleCopyResult().

◆ PQclear()

void PQclear ( PGresult res)

Definition at line 721 of file fe-exec.c.

722 {
723  PGresult_data *block;
724  int i;
725 
726  /* As a convenience, do nothing for a NULL pointer */
727  if (!res)
728  return;
729  /* Also, do nothing if the argument is OOM_result */
730  if ((const PGresult *) res == &OOM_result)
731  return;
732 
733  /* Close down any events we may have */
734  for (i = 0; i < res->nEvents; i++)
735  {
736  /* only send DESTROY to successfully-initialized event procs */
738  {
740 
741  evt.result = res;
742  (void) res->events[i].proc(PGEVT_RESULTDESTROY, &evt,
743  res->events[i].passThrough);
744  }
745  free(res->events[i].name);
746  }
747 
748  free(res->events);
749 
750  /* Free all the subsidiary blocks */
751  while ((block = res->curBlock) != NULL)
752  {
753  res->curBlock = block->next;
754  free(block);
755  }
756 
757  /* Free the top-level tuple pointer array */
758  free(res->tuples);
759 
760  /* zero out the pointer fields to catch programming errors */
761  res->attDescs = NULL;
762  res->tuples = NULL;
763  res->paramDescs = NULL;
764  res->errFields = NULL;
765  res->events = NULL;
766  res->nEvents = 0;
767  /* res->curBlock was zeroed out earlier */
768 
769  /* Free the PGresult structure itself */
770  free(res);
771 }
static const PGresult OOM_result
Definition: fe-exec.c:49
@ PGEVT_RESULTDESTROY
Definition: libpq-events.h:34
char * name
Definition: libpq-int.h:164
bool resultInitialized
Definition: libpq-int.h:167
int nEvents
Definition: libpq-int.h:191
PGresAttDesc * attDescs
Definition: libpq-int.h:174
PGMessageField * errFields
Definition: libpq-int.h:200
PGresParamDesc * paramDescs
Definition: libpq-int.h:179
PGEvent * events
Definition: libpq-int.h:190
PGresult_data * curBlock
Definition: libpq-int.h:211
PGresult_data * next
Definition: libpq-int.h:108

References pg_result::attDescs, pg_result::curBlock, pg_result::errFields, pg_result::events, free, i, PGEvent::name, pg_result::nEvents, pgresult_data::next, OOM_result, pg_result::paramDescs, PGEvent::passThrough, PGEVT_RESULTDESTROY, PGEvent::proc, res, PGEventResultDestroy::result, PGEvent::resultInitialized, and pg_result::tuples.

Referenced by pqClearAsyncResult(), PQcopyResult(), PQexecFinish(), PQexecStart(), pqInternalNotice(), and PQmakeEmptyPGresult().

◆ pqClearAsyncResult()

void pqClearAsyncResult ( PGconn conn)

Definition at line 779 of file fe-exec.c.

780 {
781  PQclear(conn->result);
782  conn->result = NULL;
783  conn->error_result = false;
785  conn->saved_result = NULL;
786 }
void PQclear(PGresult *res)
Definition: fe-exec.c:721
PGresult * saved_result
Definition: libpq-int.h:554
bool error_result
Definition: libpq-int.h:553

References conn, pg_conn::error_result, PQclear(), pg_conn::result, and pg_conn::saved_result.

Referenced by getAnotherTuple(), getParamDescriptions(), getRowDescriptions(), pqClosePGconn(), PQconnectPoll(), pqGetErrorNotice3(), pqPipelineProcessQueue(), pqSaveErrorResult(), and PQsendQueryStart().

◆ PQclosePortal()

PGresult* PQclosePortal ( PGconn conn,
const char *  portal 
)

Definition at line 2539 of file fe-exec.c.

2540 {
2541  if (!PQexecStart(conn))
2542  return NULL;
2543  if (!PQsendTypedCommand(conn, PqMsg_Close, 'P', portal))
2544  return NULL;
2545  return PQexecFinish(conn);
2546 }
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2410
static int PQsendTypedCommand(PGconn *conn, char command, char type, const char *target)
Definition: fe-exec.c:2589
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2344
#define PqMsg_Close
Definition: protocol.h:20

References conn, PQexecFinish(), PQexecStart(), PqMsg_Close, and PQsendTypedCommand().

Referenced by test_prepared().

◆ PQclosePrepared()

PGresult* PQclosePrepared ( PGconn conn,
const char *  stmt 
)

Definition at line 2521 of file fe-exec.c.

2522 {
2523  if (!PQexecStart(conn))
2524  return NULL;
2525  if (!PQsendTypedCommand(conn, PqMsg_Close, 'S', stmt))
2526  return NULL;
2527  return PQexecFinish(conn);
2528 }
#define stmt
Definition: indent_codes.h:59

References conn, PQexecFinish(), PQexecStart(), PqMsg_Close, PQsendTypedCommand(), and stmt.

Referenced by test_prepared().

◆ PQcmdStatus()

char* PQcmdStatus ( PGresult res)

Definition at line 3752 of file fe-exec.c.

3753 {
3754  if (!res)
3755  return NULL;
3756  return res->cmdStatus;
3757 }
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:181

References pg_result::cmdStatus, and res.

Referenced by dblink_exec(), ecpg_process_output(), ExecQueryAndProcessResults(), materializeResult(), PrintQueryStatus(), and test_pipelined_insert().

◆ PQcmdTuples()

char* PQcmdTuples ( PGresult res)

Definition at line 3822 of file fe-exec.c.

3823 {
3824  char *p,
3825  *c;
3826 
3827  if (!res)
3828  return "";
3829 
3830  if (strncmp(res->cmdStatus, "INSERT ", 7) == 0)
3831  {
3832  p = res->cmdStatus + 7;
3833  /* INSERT: skip oid and space */
3834  while (*p && *p != ' ')
3835  p++;
3836  if (*p == 0)
3837  goto interpret_error; /* no space? */
3838  p++;
3839  }
3840  else if (strncmp(res->cmdStatus, "SELECT ", 7) == 0 ||
3841  strncmp(res->cmdStatus, "DELETE ", 7) == 0 ||
3842  strncmp(res->cmdStatus, "UPDATE ", 7) == 0)
3843  p = res->cmdStatus + 7;
3844  else if (strncmp(res->cmdStatus, "FETCH ", 6) == 0 ||
3845  strncmp(res->cmdStatus, "MERGE ", 6) == 0)
3846  p = res->cmdStatus + 6;
3847  else if (strncmp(res->cmdStatus, "MOVE ", 5) == 0 ||
3848  strncmp(res->cmdStatus, "COPY ", 5) == 0)
3849  p = res->cmdStatus + 5;
3850  else
3851  return "";
3852 
3853  /* check that we have an integer (at least one digit, nothing else) */
3854  for (c = p; *c; c++)
3855  {
3856  if (!isdigit((unsigned char) *c))
3857  goto interpret_error;
3858  }
3859  if (c == p)
3860  goto interpret_error;
3861 
3862  return p;
3863 
3864 interpret_error:
3866  "could not interpret result from server: %s",
3867  res->cmdStatus);
3868  return "";
3869 }

References pg_result::cmdStatus, pg_result::noticeHooks, pqInternalNotice(), and res.

Referenced by ecpg_process_output(), execute_dml_stmt(), execute_foreign_modify(), and SetResultVariables().

◆ pqCommandQueueAdvance()

void pqCommandQueueAdvance ( PGconn conn,
bool  isReadyForQuery,
bool  gotSync 
)

Definition at line 3142 of file fe-exec.c.

3143 {
3144  PGcmdQueueEntry *prevquery;
3145 
3146  if (conn->cmd_queue_head == NULL)
3147  return;
3148 
3149  /*
3150  * If processing a query of simple query protocol, we only advance the
3151  * queue when we receive the ReadyForQuery message for it.
3152  */
3153  if (conn->cmd_queue_head->queryclass == PGQUERY_SIMPLE && !isReadyForQuery)
3154  return;
3155 
3156  /*
3157  * If we're waiting for a SYNC, don't advance the queue until we get one.
3158  */
3159  if (conn->cmd_queue_head->queryclass == PGQUERY_SYNC && !gotSync)
3160  return;
3161 
3162  /* delink element from queue */
3163  prevquery = conn->cmd_queue_head;
3165 
3166  /* If the queue is now empty, reset the tail too */
3167  if (conn->cmd_queue_head == NULL)
3168  conn->cmd_queue_tail = NULL;
3169 
3170  /* and make the queue element recyclable */
3171  prevquery->next = NULL;
3172  pqRecycleCmdQueueEntry(conn, prevquery);
3173 }
static void pqRecycleCmdQueueEntry(PGconn *conn, PGcmdQueueEntry *entry)
Definition: fe-exec.c:1386
@ PGQUERY_SYNC
Definition: libpq-int.h:330

References pg_conn::cmd_queue_head, pg_conn::cmd_queue_tail, conn, PGcmdQueueEntry::next, PGQUERY_SIMPLE, PGQUERY_SYNC, pqRecycleCmdQueueEntry(), and PGcmdQueueEntry::queryclass.

Referenced by PQgetResult(), and pqParseInput3().

◆ PQconsumeInput()

int PQconsumeInput ( PGconn conn)

Definition at line 1984 of file fe-exec.c.

1985 {
1986  if (!conn)
1987  return 0;
1988 
1989  /*
1990  * for non-blocking connections try to flush the send-queue, otherwise we
1991  * may never get a response for something that may not have already been
1992  * sent because it's in our write buffer!
1993  */
1994  if (pqIsnonblocking(conn))
1995  {
1996  if (pqFlush(conn) < 0)
1997  return 0;
1998  }
1999 
2000  /*
2001  * Load more data, if available. We do this no matter what state we are
2002  * in, since we are probably getting called because the application wants
2003  * to get rid of a read-select condition. Note that we will NOT block
2004  * waiting for more input.
2005  */
2006  if (pqReadData(conn) < 0)
2007  return 0;
2008 
2009  /* Parsing of the data waits till later. */
2010  return 1;
2011 }
int pqReadData(PGconn *conn)
Definition: fe-misc.c:565
int pqFlush(PGconn *conn)
Definition: fe-misc.c:953
#define pqIsnonblocking(conn)
Definition: libpq-int.h:900

References conn, pqFlush(), pqIsnonblocking, and pqReadData().

Referenced by advanceConnectionState(), confirm_query_canceled_impl(), CopyStreamReceive(), dblink_get_notify(), dblink_is_busy(), do_sql_command_end(), ecpg_process_output(), libpqrcv_PQgetResult(), libpqrcv_receive(), libpqsrv_get_result(), main(), pgfdw_cancel_query_end(), pgfdw_exec_cleanup_query_end(), pgfdw_get_cleanup_result(), postgresForeignAsyncNotify(), PQconnectPoll(), PrintNotifications(), StreamLogicalLog(), test_nosync(), test_pipelined_insert(), test_uniqviol(), try_complete_step(), and wait_on_slots().

◆ PQcopyResult()

PGresult* PQcopyResult ( const PGresult src,
int  flags 
)

Definition at line 318 of file fe-exec.c.

319 {
320  PGresult *dest;
321  int i;
322 
323  if (!src)
324  return NULL;
325 
327  if (!dest)
328  return NULL;
329 
330  /* Always copy these over. Is cmdStatus really useful here? */
331  dest->client_encoding = src->client_encoding;
332  strcpy(dest->cmdStatus, src->cmdStatus);
333 
334  /* Wants attrs? */
335  if (flags & (PG_COPYRES_ATTRS | PG_COPYRES_TUPLES))
336  {
337  if (!PQsetResultAttrs(dest, src->numAttributes, src->attDescs))
338  {
339  PQclear(dest);
340  return NULL;
341  }
342  }
343 
344  /* Wants to copy tuples? */
345  if (flags & PG_COPYRES_TUPLES)
346  {
347  int tup,
348  field;
349 
350  for (tup = 0; tup < src->ntups; tup++)
351  {
352  for (field = 0; field < src->numAttributes; field++)
353  {
354  if (!PQsetvalue(dest, tup, field,
355  src->tuples[tup][field].value,
356  src->tuples[tup][field].len))
357  {
358  PQclear(dest);
359  return NULL;
360  }
361  }
362  }
363  }
364 
365  /* Wants to copy notice hooks? */
366  if (flags & PG_COPYRES_NOTICEHOOKS)
367  dest->noticeHooks = src->noticeHooks;
368 
369  /* Wants to copy PGEvents? */
370  if ((flags & PG_COPYRES_EVENTS) && src->nEvents > 0)
371  {
372  dest->events = dupEvents(src->events, src->nEvents,
373  &dest->memorySize);
374  if (!dest->events)
375  {
376  PQclear(dest);
377  return NULL;
378  }
379  dest->nEvents = src->nEvents;
380  }
381 
382  /* Okay, trigger PGEVT_RESULTCOPY event */
383  for (i = 0; i < dest->nEvents; i++)
384  {
385  /* We don't fire events that had some previous failure */
386  if (src->events[i].resultInitialized)
387  {
388  PGEventResultCopy evt;
389 
390  evt.src = src;
391  evt.dest = dest;
392  if (dest->events[i].proc(PGEVT_RESULTCOPY, &evt,
393  dest->events[i].passThrough))
394  dest->events[i].resultInitialized = true;
395  }
396  }
397 
398  return dest;
399 }
int PQsetResultAttrs(PGresult *res, int numAttributes, PGresAttDesc *attDescs)
Definition: fe-exec.c:249
static PGEvent * dupEvents(PGEvent *events, int count, size_t *memSize)
Definition: fe-exec.c:408
int PQsetvalue(PGresult *res, int tup_num, int field_num, char *value, int len)
Definition: fe-exec.c:452
@ PGEVT_RESULTCOPY
Definition: libpq-events.h:33
@ PGRES_TUPLES_OK
Definition: libpq-fe.h:102
#define PG_COPYRES_TUPLES
Definition: libpq-fe.h:46
#define PG_COPYRES_ATTRS
Definition: libpq-fe.h:45
#define PG_COPYRES_EVENTS
Definition: libpq-fe.h:47
#define PG_COPYRES_NOTICEHOOKS
Definition: libpq-fe.h:48
const PGresult * src
Definition: libpq-events.h:60
PGresult * dest
Definition: libpq-events.h:61
int client_encoding
Definition: libpq-int.h:192
char * value
Definition: libpq-int.h:141

References pg_result::attDescs, pg_result::client_encoding, pg_result::cmdStatus, generate_unaccent_rules::dest, PGEventResultCopy::dest, dupEvents(), pg_result::events, i, pgresAttValue::len, pg_result::nEvents, pg_result::noticeHooks, pg_result::ntups, pg_result::numAttributes, PG_COPYRES_ATTRS, PG_COPYRES_EVENTS, PG_COPYRES_NOTICEHOOKS, PG_COPYRES_TUPLES, PGEVT_RESULTCOPY, PGRES_TUPLES_OK, PQclear(), PQmakeEmptyPGresult(), PQsetResultAttrs(), PQsetvalue(), PGEvent::resultInitialized, PGEventResultCopy::src, pg_result::tuples, and pgresAttValue::value.

Referenced by pqRowProcessor().

◆ PQdescribePortal()

PGresult* PQdescribePortal ( PGconn conn,
const char *  portal 
)

Definition at line 2474 of file fe-exec.c.

2475 {
2476  if (!PQexecStart(conn))
2477  return NULL;
2478  if (!PQsendTypedCommand(conn, PqMsg_Describe, 'P', portal))
2479  return NULL;
2480  return PQexecFinish(conn);
2481 }
#define PqMsg_Describe
Definition: protocol.h:21

References conn, PQexecFinish(), PQexecStart(), PqMsg_Describe, and PQsendTypedCommand().

Referenced by test_prepared().

◆ PQdescribePrepared()

PGresult* PQdescribePrepared ( PGconn conn,
const char *  stmt 
)

Definition at line 2455 of file fe-exec.c.

2456 {
2457  if (!PQexecStart(conn))
2458  return NULL;
2460  return NULL;
2461  return PQexecFinish(conn);
2462 }

References conn, PQexecFinish(), PQexecStart(), PqMsg_Describe, PQsendTypedCommand(), and stmt.

Referenced by DescribeQuery(), ECPGdescribe(), and test_prepared().

◆ PQendcopy()

int PQendcopy ( PGconn conn)

Definition at line 2949 of file fe-exec.c.

2950 {
2951  if (!conn)
2952  return 0;
2953 
2954  return pqEndcopy3(conn);
2955 }
int pqEndcopy3(PGconn *conn)

References conn, and pqEndcopy3().

Referenced by ecpg_check_PQresult(), initPopulateTable(), and libpqrcv_endstreaming().

◆ PQenterPipelineMode()

int PQenterPipelineMode ( PGconn conn)

Definition at line 3042 of file fe-exec.c.

3043 {
3044  if (!conn)
3045  return 0;
3046 
3047  /* succeed with no action if already in pipeline mode */
3049  return 1;
3050 
3051  if (conn->asyncStatus != PGASYNC_IDLE)
3052  {
3053  libpq_append_conn_error(conn, "cannot enter pipeline mode, connection not idle");
3054  return 0;
3055  }
3056 
3058 
3059  return 1;
3060 }

References pg_conn::asyncStatus, conn, libpq_append_conn_error(), PGASYNC_IDLE, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, and PQ_PIPELINE_ON.

Referenced by executeMetaCommand(), test_disallowed_in_pipeline(), test_multi_pipelines(), test_nosync(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), test_transaction(), and test_uniqviol().

◆ PQescapeBytea()

unsigned char* PQescapeBytea ( const unsigned char *  from,
size_t  from_length,
size_t *  to_length 
)

Definition at line 4469 of file fe-exec.c.

4470 {
4471  return PQescapeByteaInternal(NULL, from, from_length, to_length,
4473  false /* can't use hex */ );
4474 }
static unsigned char * PQescapeByteaInternal(PGconn *conn, const unsigned char *from, size_t from_length, size_t *to_length, bool std_strings, bool use_hex)
Definition: fe-exec.c:4357
static bool static_std_strings
Definition: fe-exec.c:60

References PQescapeByteaInternal(), and static_std_strings.

◆ PQescapeByteaConn()

unsigned char* PQescapeByteaConn ( PGconn conn,
const unsigned char *  from,
size_t  from_length,
size_t *  to_length 
)

Definition at line 4453 of file fe-exec.c.

4456 {
4457  if (!conn)
4458  return NULL;
4459 
4460  if (conn->cmd_queue_head == NULL)
4462 
4463  return PQescapeByteaInternal(conn, from, from_length, to_length,
4464  conn->std_strings,
4465  (conn->sversion >= 90000));
4466 }
#define pqClearConnErrorState(conn)
Definition: libpq-int.h:884
bool std_strings
Definition: libpq-int.h:512
int sversion
Definition: libpq-int.h:478

References pg_conn::cmd_queue_head, conn, pqClearConnErrorState, PQescapeByteaInternal(), pg_conn::std_strings, and pg_conn::sversion.

◆ PQescapeByteaInternal()

static unsigned char* PQescapeByteaInternal ( PGconn conn,
const unsigned char *  from,
size_t  from_length,
size_t *  to_length,
bool  std_strings,
bool  use_hex 
)
static

Definition at line 4357 of file fe-exec.c.

4360 {
4361  const unsigned char *vp;
4362  unsigned char *rp;
4363  unsigned char *result;
4364  size_t i;
4365  size_t len;
4366  size_t bslash_len = (std_strings ? 1 : 2);
4367 
4368  /*
4369  * empty string has 1 char ('\0')
4370  */
4371  len = 1;
4372 
4373  if (use_hex)
4374  {
4375  len += bslash_len + 1 + 2 * from_length;
4376  }
4377  else
4378  {
4379  vp = from;
4380  for (i = from_length; i > 0; i--, vp++)
4381  {
4382  if (*vp < 0x20 || *vp > 0x7e)
4383  len += bslash_len + 3;
4384  else if (*vp == '\'')
4385  len += 2;
4386  else if (*vp == '\\')
4387  len += bslash_len + bslash_len;
4388  else
4389  len++;
4390  }
4391  }
4392 
4393  *to_length = len;
4394  rp = result = (unsigned char *) malloc(len);
4395  if (rp == NULL)
4396  {
4397  if (conn)
4398  libpq_append_conn_error(conn, "out of memory");
4399  return NULL;
4400  }
4401 
4402  if (use_hex)
4403  {
4404  if (!std_strings)
4405  *rp++ = '\\';
4406  *rp++ = '\\';
4407  *rp++ = 'x';
4408  }
4409 
4410  vp = from;
4411  for (i = from_length; i > 0; i--, vp++)
4412  {
4413  unsigned char c = *vp;
4414 
4415  if (use_hex)
4416  {
4417  *rp++ = hextbl[(c >> 4) & 0xF];
4418  *rp++ = hextbl[c & 0xF];
4419  }
4420  else if (c < 0x20 || c > 0x7e)
4421  {
4422  if (!std_strings)
4423  *rp++ = '\\';
4424  *rp++ = '\\';
4425  *rp++ = (c >> 6) + '0';
4426  *rp++ = ((c >> 3) & 07) + '0';
4427  *rp++ = (c & 07) + '0';
4428  }
4429  else if (c == '\'')
4430  {
4431  *rp++ = '\'';
4432  *rp++ = '\'';
4433  }
4434  else if (c == '\\')
4435  {
4436  if (!std_strings)
4437  {
4438  *rp++ = '\\';
4439  *rp++ = '\\';
4440  }
4441  *rp++ = '\\';
4442  *rp++ = '\\';
4443  }
4444  else
4445  *rp++ = c;
4446  }
4447  *rp = '\0';
4448 
4449  return result;
4450 }
static const char hextbl[]
Definition: fe-exec.c:4316
const void size_t len

References conn, hextbl, i, len, libpq_append_conn_error(), and malloc.

Referenced by PQescapeBytea(), and PQescapeByteaConn().

◆ PQescapeIdentifier()

char* PQescapeIdentifier ( PGconn conn,
const char *  str,
size_t  len 
)

Definition at line 4310 of file fe-exec.c.

4311 {
4312  return PQescapeInternal(conn, str, len, true);
4313 }
static char * PQescapeInternal(PGconn *conn, const char *str, size_t len, bool as_ident)
Definition: fe-exec.c:4182
const char * str

References conn, len, PQescapeInternal(), and str.

Referenced by create_publication(), create_subscription(), drop_publication(), enable_subscription(), initCreatePKeys(), initCreateTables(), main(), PQchangePassword(), psql_get_variable(), stringlist_to_identifierstr(), and vacuumlo().

◆ PQescapeInternal()

static char* PQescapeInternal ( PGconn conn,
const char *  str,
size_t  len,
bool  as_ident 
)
static

Definition at line 4182 of file fe-exec.c.

4183 {
4184  const char *s;
4185  char *result;
4186  char *rp;
4187  int num_quotes = 0; /* single or double, depending on as_ident */
4188  int num_backslashes = 0;
4189  int input_len;
4190  int result_size;
4191  char quote_char = as_ident ? '"' : '\'';
4192 
4193  /* We must have a connection, else fail immediately. */
4194  if (!conn)
4195  return NULL;
4196 
4197  if (conn->cmd_queue_head == NULL)
4199 
4200  /* Scan the string for characters that must be escaped. */
4201  for (s = str; (s - str) < len && *s != '\0'; ++s)
4202  {
4203  if (*s == quote_char)
4204  ++num_quotes;
4205  else if (*s == '\\')
4206  ++num_backslashes;
4207  else if (IS_HIGHBIT_SET(*s))
4208  {
4209  int charlen;
4210 
4211  /* Slow path for possible multibyte characters */
4212  charlen = pg_encoding_mblen(conn->client_encoding, s);
4213 
4214  /* Multibyte character overruns allowable length. */
4215  if ((s - str) + charlen > len || memchr(s, 0, charlen) != NULL)
4216  {
4217  libpq_append_conn_error(conn, "incomplete multibyte character");
4218  return NULL;
4219  }
4220 
4221  /* Adjust s, bearing in mind that for loop will increment it. */
4222  s += charlen - 1;
4223  }
4224  }
4225 
4226  /* Allocate output buffer. */
4227  input_len = s - str;
4228  result_size = input_len + num_quotes + 3; /* two quotes, plus a NUL */
4229  if (!as_ident && num_backslashes > 0)
4230  result_size += num_backslashes + 2;
4231  result = rp = (char *) malloc(result_size);
4232  if (rp == NULL)
4233  {
4234  libpq_append_conn_error(conn, "out of memory");
4235  return NULL;
4236  }
4237 
4238  /*
4239  * If we are escaping a literal that contains backslashes, we use the
4240  * escape string syntax so that the result is correct under either value
4241  * of standard_conforming_strings. We also emit a leading space in this
4242  * case, to guard against the possibility that the result might be
4243  * interpolated immediately following an identifier.
4244  */
4245  if (!as_ident && num_backslashes > 0)
4246  {
4247  *rp++ = ' ';
4248  *rp++ = 'E';
4249  }
4250 
4251  /* Opening quote. */
4252  *rp++ = quote_char;
4253 
4254  /*
4255  * Use fast path if possible.
4256  *
4257  * We've already verified that the input string is well-formed in the
4258  * current encoding. If it contains no quotes and, in the case of
4259  * literal-escaping, no backslashes, then we can just copy it directly to
4260  * the output buffer, adding the necessary quotes.
4261  *
4262  * If not, we must rescan the input and process each character
4263  * individually.
4264  */
4265  if (num_quotes == 0 && (num_backslashes == 0 || as_ident))
4266  {
4267  memcpy(rp, str, input_len);
4268  rp += input_len;
4269  }
4270  else
4271  {
4272  for (s = str; s - str < input_len; ++s)
4273  {
4274  if (*s == quote_char || (!as_ident && *s == '\\'))
4275  {
4276  *rp++ = *s;
4277  *rp++ = *s;
4278  }
4279  else if (!IS_HIGHBIT_SET(*s))
4280  *rp++ = *s;
4281  else
4282  {
4284 
4285  while (1)
4286  {
4287  *rp++ = *s;
4288  if (--i == 0)
4289  break;
4290  ++s; /* for loop will provide the final increment */
4291  }
4292  }
4293  }
4294  }
4295 
4296  /* Closing quote and terminating NUL. */
4297  *rp++ = quote_char;
4298  *rp = '\0';
4299 
4300  return result;
4301 }
#define IS_HIGHBIT_SET(ch)
Definition: c.h:1155
int client_encoding
Definition: libpq-int.h:511
int pg_encoding_mblen(int encoding, const char *mbstr)
Definition: wchar.c:2069

References pg_conn::client_encoding, pg_conn::cmd_queue_head, conn, i, IS_HIGHBIT_SET, len, libpq_append_conn_error(), malloc, pg_encoding_mblen(), pqClearConnErrorState, and str.

Referenced by PQescapeIdentifier(), and PQescapeLiteral().

◆ PQescapeLiteral()

◆ PQescapeString()

size_t PQescapeString ( char *  to,
const char *  from,
size_t  length 
)

Definition at line 4167 of file fe-exec.c.

4168 {
4169  return PQescapeStringInternal(NULL, to, from, length, NULL,
4172 }
static size_t PQescapeStringInternal(PGconn *conn, char *to, const char *from, size_t length, int *error, int encoding, bool std_strings)
Definition: fe-exec.c:4071
static int static_client_encoding
Definition: fe-exec.c:59

References PQescapeStringInternal(), static_client_encoding, and static_std_strings.

Referenced by get_comma_elts(), and quote_postgres().

◆ PQescapeStringConn()

size_t PQescapeStringConn ( PGconn conn,
char *  to,
const char *  from,
size_t  length,
int *  error 
)

Definition at line 4145 of file fe-exec.c.

4148 {
4149  if (!conn)
4150  {
4151  /* force empty-string result */
4152  *to = '\0';
4153  if (error)
4154  *error = 1;
4155  return 0;
4156  }
4157 
4158  if (conn->cmd_queue_head == NULL)
4160 
4161  return PQescapeStringInternal(conn, to, from, length, error,
4163  conn->std_strings);
4164 }
static void error(void)
Definition: sql-dyntest.c:147

References pg_conn::client_encoding, pg_conn::cmd_queue_head, conn, error(), pqClearConnErrorState, PQescapeStringInternal(), and pg_conn::std_strings.

Referenced by AppendStringCommandOption(), appendStringLiteralConn(), check_loadable_libraries(), and do_lo_import().

◆ PQescapeStringInternal()

static size_t PQescapeStringInternal ( PGconn conn,
char *  to,
const char *  from,
size_t  length,
int *  error,
int  encoding,
bool  std_strings 
)
static

Definition at line 4071 of file fe-exec.c.

4075 {
4076  const char *source = from;
4077  char *target = to;
4078  size_t remaining = length;
4079 
4080  if (error)
4081  *error = 0;
4082 
4083  while (remaining > 0 && *source != '\0')
4084  {
4085  char c = *source;
4086  int len;
4087  int i;
4088 
4089  /* Fast path for plain ASCII */
4090  if (!IS_HIGHBIT_SET(c))
4091  {
4092  /* Apply quoting if needed */
4093  if (SQL_STR_DOUBLE(c, !std_strings))
4094  *target++ = c;
4095  /* Copy the character */
4096  *target++ = c;
4097  source++;
4098  remaining--;
4099  continue;
4100  }
4101 
4102  /* Slow path for possible multibyte characters */
4104 
4105  /* Copy the character */
4106  for (i = 0; i < len; i++)
4107  {
4108  if (remaining == 0 || *source == '\0')
4109  break;
4110  *target++ = *source++;
4111  remaining--;
4112  }
4113 
4114  /*
4115  * If we hit premature end of string (ie, incomplete multibyte
4116  * character), try to pad out to the correct length with spaces. We
4117  * may not be able to pad completely, but we will always be able to
4118  * insert at least one pad space (since we'd not have quoted a
4119  * multibyte character). This should be enough to make a string that
4120  * the server will error out on.
4121  */
4122  if (i < len)
4123  {
4124  if (error)
4125  *error = 1;
4126  if (conn)
4127  libpq_append_conn_error(conn, "incomplete multibyte character");
4128  for (; i < len; i++)
4129  {
4130  if (((size_t) (target - to)) / 2 >= length)
4131  break;
4132  *target++ = ' ';
4133  }
4134  break;
4135  }
4136  }
4137 
4138  /* Write the terminating NUL character. */
4139  *target = '\0';
4140 
4141  return target - to;
4142 }
#define SQL_STR_DOUBLE(ch, escape_backslash)
Definition: c.h:1163
int remaining
Definition: informix.c:673
int32 encoding
Definition: pg_database.h:41
static rewind_source * source
Definition: pg_rewind.c:89

References conn, encoding, error(), i, IS_HIGHBIT_SET, len, libpq_append_conn_error(), pg_encoding_mblen(), remaining, source, and SQL_STR_DOUBLE.

Referenced by PQescapeString(), and PQescapeStringConn().

◆ PQexec()

PGresult* PQexec ( PGconn conn,
const char *  query 
)

Definition at line 2262 of file fe-exec.c.

2263 {
2264  if (!PQexecStart(conn))
2265  return NULL;
2266  if (!PQsendQuery(conn, query))
2267  return NULL;
2268  return PQexecFinish(conn);
2269 }
int PQsendQuery(PGconn *conn, const char *query)
Definition: fe-exec.c:1416

References conn, PQexecFinish(), PQexecStart(), and PQsendQuery().

Referenced by _doSetSessionAuth(), _printTableAccessMethodNoStorage(), _selectOutputSchema(), _selectTableAccessMethod(), _selectTablespace(), check_and_drop_existing_subscriptions(), check_loadable_libraries(), check_prepare_conn(), check_publisher(), check_subscriber(), connect_database(), create_logical_replication_slot(), create_publication(), create_subscription(), CreateReplicationSlot(), deallocate_one(), DescribeQuery(), drop_existing_subscriptions(), drop_failover_replication_slots(), drop_publication(), drop_replication_slot(), DropReplicationSlot(), ecpg_autostart_transaction(), ecpg_execute(), ECPGsetcommit(), ECPGtrans(), enable_subscription(), executeCommand(), executeMaintenanceCommand(), executeQuery(), executeQueryOrDie(), ExecuteSqlCommand(), ExecuteSqlQuery(), ExecuteSqlStatement(), executeStatement(), generate_object_name(), get_create_object_cmd(), get_primary_sysid(), GetConnection(), GetSlotInformation(), GetTableInfo(), init_libpq_conn(), initPopulateTable(), libpq_traverse_files(), lo_initialize(), lockTableForWorker(), lookup_object_oid(), main(), PQchangePassword(), PQencryptPasswordConn(), PQsetClientEncoding(), PSQLexec(), ReceiveXlogStream(), RetrieveDataDirCreatePerm(), RetrieveWalSegSize(), run_permutation(), run_simple_command(), run_simple_query(), RunIdentifySystem(), SendQuery(), server_is_in_recovery(), set_replication_progress(), sql_conn(), sql_exec(), StreamLogicalLog(), test_disallowed_in_pipeline(), test_pipeline_abort(), test_prepared(), test_transaction(), test_uniqviol(), tryExecuteStatement(), and vacuumlo().

◆ PQexecFinish()

static PGresult * PQexecFinish ( PGconn conn)
static

Definition at line 2410 of file fe-exec.c.

2411 {
2412  PGresult *result;
2413  PGresult *lastResult;
2414 
2415  /*
2416  * For backwards compatibility, return the last result if there are more
2417  * than one. (We used to have logic here to concatenate successive error
2418  * messages, but now that happens automatically, since conn->errorMessage
2419  * will continue to accumulate errors throughout this loop.)
2420  *
2421  * We have to stop if we see copy in/out/both, however. We will resume
2422  * parsing after application performs the data transfer.
2423  *
2424  * Also stop if the connection is lost (else we'll loop infinitely).
2425  */
2426  lastResult = NULL;
2427  while ((result = PQgetResult(conn)) != NULL)
2428  {
2429  PQclear(lastResult);
2430  lastResult = result;
2431  if (result->resultStatus == PGRES_COPY_IN ||
2432  result->resultStatus == PGRES_COPY_OUT ||
2433  result->resultStatus == PGRES_COPY_BOTH ||
2435  break;
2436  }
2437 
2438  return lastResult;
2439 }
PGresult * PQgetResult(PGconn *conn)
Definition: fe-exec.c:2062
@ CONNECTION_BAD
Definition: libpq-fe.h:61
@ PGRES_COPY_IN
Definition: libpq-fe.h:106
@ PGRES_COPY_BOTH
Definition: libpq-fe.h:111
@ PGRES_COPY_OUT
Definition: libpq-fe.h:105

References conn, CONNECTION_BAD, PGRES_COPY_BOTH, PGRES_COPY_IN, PGRES_COPY_OUT, PQclear(), PQgetResult(), pg_result::resultStatus, and pg_conn::status.

Referenced by PQclosePortal(), PQclosePrepared(), PQdescribePortal(), PQdescribePrepared(), PQexec(), PQexecParams(), PQexecPrepared(), and PQprepare().

◆ PQexecParams()

PGresult* PQexecParams ( PGconn conn,
const char *  command,
int  nParams,
const Oid paramTypes,
const char *const *  paramValues,
const int *  paramLengths,
const int *  paramFormats,
int  resultFormat 
)

Definition at line 2276 of file fe-exec.c.

2284 {
2285  if (!PQexecStart(conn))
2286  return NULL;
2287  if (!PQsendQueryParams(conn, command,
2288  nParams, paramTypes, paramValues, paramLengths,
2289  paramFormats, resultFormat))
2290  return NULL;
2291  return PQexecFinish(conn);
2292 }
int PQsendQueryParams(PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
Definition: fe-exec.c:1492

References conn, PQexecFinish(), PQexecStart(), and PQsendQueryParams().

Referenced by ecpg_execute(), libpq_fetch_file(), main(), and wait_for_connection_state().

◆ PQexecPrepared()

PGresult* PQexecPrepared ( PGconn conn,
const char *  stmtName,
int  nParams,
const char *const *  paramValues,
const int *  paramLengths,
const int *  paramFormats,
int  resultFormat 
)

Definition at line 2323 of file fe-exec.c.

2330 {
2331  if (!PQexecStart(conn))
2332  return NULL;
2333  if (!PQsendQueryPrepared(conn, stmtName,
2334  nParams, paramValues, paramLengths,
2335  paramFormats, resultFormat))
2336  return NULL;
2337  return PQexecFinish(conn);
2338 }
int PQsendQueryPrepared(PGconn *conn, const char *stmtName, int nParams, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
Definition: fe-exec.c:1633

References conn, PQexecFinish(), PQexecStart(), and PQsendQueryPrepared().

Referenced by ecpg_execute(), and try_complete_step().

◆ PQexecStart()

static bool PQexecStart ( PGconn conn)
static

Definition at line 2344 of file fe-exec.c.

2345 {
2346  PGresult *result;
2347 
2348  if (!conn)
2349  return false;
2350 
2351  /*
2352  * Since this is the beginning of a query cycle, reset the error state.
2353  * However, in pipeline mode with something already queued, the error
2354  * buffer belongs to that command and we shouldn't clear it.
2355  */
2356  if (conn->cmd_queue_head == NULL)
2358 
2360  {
2361  libpq_append_conn_error(conn, "synchronous command execution functions are not allowed in pipeline mode");
2362  return false;
2363  }
2364 
2365  /*
2366  * Silently discard any prior query result that application didn't eat.
2367  * This is probably poor design, but it's here for backward compatibility.
2368  */
2369  while ((result = PQgetResult(conn)) != NULL)
2370  {
2371  ExecStatusType resultStatus = result->resultStatus;
2372 
2373  PQclear(result); /* only need its status */
2374  if (resultStatus == PGRES_COPY_IN)
2375  {
2376  /* get out of a COPY IN state */
2377  if (PQputCopyEnd(conn,
2378  libpq_gettext("COPY terminated by new PQexec")) < 0)
2379  return false;
2380  /* keep waiting to swallow the copy's failure message */
2381  }
2382  else if (resultStatus == PGRES_COPY_OUT)
2383  {
2384  /*
2385  * Get out of a COPY OUT state: we just switch back to BUSY and
2386  * allow the remaining COPY data to be dropped on the floor.
2387  */
2389  /* keep waiting to swallow the copy's completion message */
2390  }
2391  else if (resultStatus == PGRES_COPY_BOTH)
2392  {
2393  /* We don't allow PQexec during COPY BOTH */
2394  libpq_append_conn_error(conn, "PQexec not allowed during COPY BOTH");
2395  return false;
2396  }
2397  /* check for loss of connection, too */
2398  if (conn->status == CONNECTION_BAD)
2399  return false;
2400  }
2401 
2402  /* OK to send a command */
2403  return true;
2404 }
int PQputCopyEnd(PGconn *conn, const char *errormsg)
Definition: fe-exec.c:2749
ExecStatusType
Definition: libpq-fe.h:97

References pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, CONNECTION_BAD, libpq_append_conn_error(), libpq_gettext, PGASYNC_BUSY, PGRES_COPY_BOTH, PGRES_COPY_IN, PGRES_COPY_OUT, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, PQclear(), pqClearConnErrorState, PQgetResult(), PQputCopyEnd(), pg_result::resultStatus, and pg_conn::status.

Referenced by PQclosePortal(), PQclosePrepared(), PQdescribePortal(), PQdescribePrepared(), PQexec(), PQexecParams(), PQexecPrepared(), and PQprepare().

◆ PQexitPipelineMode()

int PQexitPipelineMode ( PGconn conn)

Definition at line 3073 of file fe-exec.c.

3074 {
3075  if (!conn)
3076  return 0;
3077 
3079  (conn->asyncStatus == PGASYNC_IDLE ||
3081  conn->cmd_queue_head == NULL)
3082  return 1;
3083 
3084  switch (conn->asyncStatus)
3085  {
3086  case PGASYNC_READY:
3087  case PGASYNC_READY_MORE:
3088  /* there are some uncollected results */
3089  libpq_append_conn_error(conn, "cannot exit pipeline mode with uncollected results");
3090  return 0;
3091 
3092  case PGASYNC_BUSY:
3093  libpq_append_conn_error(conn, "cannot exit pipeline mode while busy");
3094  return 0;
3095 
3096  case PGASYNC_IDLE:
3097  case PGASYNC_PIPELINE_IDLE:
3098  /* OK */
3099  break;
3100 
3101  case PGASYNC_COPY_IN:
3102  case PGASYNC_COPY_OUT:
3103  case PGASYNC_COPY_BOTH:
3104  libpq_append_conn_error(conn, "cannot exit pipeline mode while in COPY");
3105  }
3106 
3107  /* still work to process */
3108  if (conn->cmd_queue_head != NULL)
3109  {
3110  libpq_append_conn_error(conn, "cannot exit pipeline mode with uncollected results");
3111  return 0;
3112  }
3113 
3116 
3117  /* Flush any pending data in out buffer */
3118  if (pqFlush(conn) < 0)
3119  return 0; /* error message is setup already */
3120  return 1;
3121 }
@ PGASYNC_COPY_OUT
Definition: libpq-int.h:229
@ PGASYNC_READY_MORE
Definition: libpq-int.h:225
@ PGASYNC_READY
Definition: libpq-int.h:223
@ PGASYNC_COPY_BOTH
Definition: libpq-int.h:230
@ PGASYNC_COPY_IN
Definition: libpq-int.h:228

References pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, libpq_append_conn_error(), PGASYNC_BUSY, PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, PGASYNC_COPY_OUT, PGASYNC_IDLE, PGASYNC_PIPELINE_IDLE, PGASYNC_READY, PGASYNC_READY_MORE, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, and pqFlush().

Referenced by discardUntilSync(), readCommandResponse(), test_disallowed_in_pipeline(), test_multi_pipelines(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), and test_transaction().

◆ PQfformat()

int PQfformat ( const PGresult res,
int  field_num 
)

Definition at line 3708 of file fe-exec.c.

3709 {
3710  if (!check_field_number(res, field_num))
3711  return 0;
3712  if (res->attDescs)
3713  return res->attDescs[field_num].format;
3714  else
3715  return 0;
3716 }
static int check_field_number(const PGresult *res, int field_num)
Definition: fe-exec.c:3510

References pg_result::attDescs, check_field_number(), pgresAttDesc::format, and res.

Referenced by ecpg_get_data(), ecpg_store_result(), and process_queued_fetch_requests().

◆ PQflush()

int PQflush ( PGconn conn)

◆ PQfmod()

int PQfmod ( const PGresult res,
int  field_num 
)

Definition at line 3741 of file fe-exec.c.

3742 {
3743  if (!check_field_number(res, field_num))
3744  return 0;
3745  if (res->attDescs)
3746  return res->attDescs[field_num].atttypmod;
3747  else
3748  return 0;
3749 }
int atttypmod
Definition: libpq-fe.h:280

References pg_result::attDescs, pgresAttDesc::atttypmod, check_field_number(), and res.

Referenced by DescribeQuery(), and ECPGget_desc().

◆ PQfn()

PGresult* PQfn ( PGconn conn,
int  fnid,
int *  result_buf,
int *  result_len,
int  result_is_int,
const PQArgBlock args,
int  nargs 
)

Definition at line 2980 of file fe-exec.c.

2987 {
2988  *result_len = 0;
2989 
2990  if (!conn)
2991  return NULL;
2992 
2993  /*
2994  * Since this is the beginning of a query cycle, reset the error state.
2995  * However, in pipeline mode with something already queued, the error
2996  * buffer belongs to that command and we shouldn't clear it.
2997  */
2998  if (conn->cmd_queue_head == NULL)
3000 
3002  {
3003  libpq_append_conn_error(conn, "%s not allowed in pipeline mode", "PQfn");
3004  return NULL;
3005  }
3006 
3009  {
3010  libpq_append_conn_error(conn, "connection in wrong state");
3011  return NULL;
3012  }
3013 
3014  return pqFunctionCall3(conn, fnid,
3015  result_buf, result_len,
3016  result_is_int,
3017  args, nargs);
3018 }
PGresult * pqFunctionCall3(PGconn *conn, Oid fnid, int *result_buf, int *actual_result_len, int result_is_int, const PQArgBlock *args, int nargs)
#define PGINVALID_SOCKET
Definition: port.h:31
pgsocket sock
Definition: libpq-int.h:473

References generate_unaccent_rules::args, pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, libpq_append_conn_error(), PGASYNC_IDLE, pgHavePendingResult, PGINVALID_SOCKET, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, pqClearConnErrorState, pqFunctionCall3(), and pg_conn::sock.

Referenced by lo_close(), lo_creat(), lo_create(), lo_lseek(), lo_lseek64(), lo_open(), lo_read(), lo_tell(), lo_tell64(), lo_truncate(), lo_truncate64(), lo_unlink(), and lo_write().

◆ PQfname()

char* PQfname ( const PGresult res,
int  field_num 
)

◆ PQfnumber()

int PQfnumber ( const PGresult res,
const char *  field_name 
)

Definition at line 3589 of file fe-exec.c.

3590 {
3591  char *field_case;
3592  bool in_quotes;
3593  bool all_lower = true;
3594  const char *iptr;
3595  char *optr;
3596  int i;
3597 
3598  if (!res)
3599  return -1;
3600 
3601  /*
3602  * Note: it is correct to reject a zero-length input string; the proper
3603  * input to match a zero-length field name would be "".
3604  */
3605  if (field_name == NULL ||
3606  field_name[0] == '\0' ||
3607  res->attDescs == NULL)
3608  return -1;
3609 
3610  /*
3611  * Check if we can avoid the strdup() and related work because the
3612  * passed-in string wouldn't be changed before we do the check anyway.
3613  */
3614  for (iptr = field_name; *iptr; iptr++)
3615  {
3616  char c = *iptr;
3617 
3618  if (c == '"' || c != pg_tolower((unsigned char) c))
3619  {
3620  all_lower = false;
3621  break;
3622  }
3623  }
3624 
3625  if (all_lower)
3626  for (i = 0; i < res->numAttributes; i++)
3627  if (strcmp(field_name, res->attDescs[i].name) == 0)
3628  return i;
3629 
3630  /* Fall through to the normal check if that didn't work out. */
3631 
3632  /*
3633  * Note: this code will not reject partially quoted strings, eg
3634  * foo"BAR"foo will become fooBARfoo when it probably ought to be an error
3635  * condition.
3636  */
3637  field_case = strdup(field_name);
3638  if (field_case == NULL)
3639  return -1; /* grotty */
3640 
3641  in_quotes = false;
3642  optr = field_case;
3643  for (iptr = field_case; *iptr; iptr++)
3644  {
3645  char c = *iptr;
3646 
3647  if (in_quotes)
3648  {
3649  if (c == '"')
3650  {
3651  if (iptr[1] == '"')
3652  {
3653  /* doubled quotes become a single quote */
3654  *optr++ = '"';
3655  iptr++;
3656  }
3657  else
3658  in_quotes = false;
3659  }
3660  else
3661  *optr++ = c;
3662  }
3663  else if (c == '"')
3664  in_quotes = true;
3665  else
3666  {
3667  c = pg_tolower((unsigned char) c);
3668  *optr++ = c;
3669  }
3670  }
3671  *optr = '\0';
3672 
3673  for (i = 0; i < res->numAttributes; i++)
3674  {
3675  if (strcmp(field_case, res->attDescs[i].name) == 0)
3676  {
3677  free(field_case);
3678  return i;
3679  }
3680  }
3681  free(field_case);
3682  return -1;
3683 }
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122

References pg_result::attDescs, free, i, pgresAttDesc::name, pg_result::numAttributes, pg_tolower(), and res.

Referenced by append_depends_on_extension(), binary_upgrade_set_type_oids_by_type_oid(), buildMatViewRefreshDependencies(), check_for_data_types_usage(), check_for_incompatible_polymorphics(), check_for_isn_and_int8_passing_mismatch(), check_for_pg_role_prefix(), check_for_tables_with_oids(), check_for_user_defined_encoding_conversions(), check_for_user_defined_postfix_ops(), check_proper_datallowconn(), collectComments(), collectSecLabels(), describeOneTableDetails(), dropRoles(), dumpAgg(), dumpBaseType(), dumpCollation(), dumpCompositeType(), dumpCompositeTypeColComments(), dumpConversion(), dumpDatabase(), dumpDomain(), dumpEnumType(), dumpFunc(), dumpOpclass(), dumpOpfamily(), dumpOpr(), dumpRangeType(), dumpRoleMembership(), dumpRoles(), dumpTableSchema(), dumpTSConfig(), dumpUserMappings(), get_db_infos(), get_old_cluster_logical_slot_infos(), get_rel_infos(), get_tablespace_paths(), get_template0_info(), getAccessMethods(), getAggregates(), getCasts(), getCollations(), getConstraints(), getConversions(), getDefaultACLs(), getDependencies(), getDomainConstraints(), getEventTriggers(), getExtendedStatistics(), getExtensionMembership(), getExtensions(), getForeignDataWrappers(), getForeignServers(), getFuncs(), getIndexes(), getInherits(), getLOs(), getNamespaces(), getOpclasses(), getOperators(), getOpfamilies(), getPolicies(), getProcLangs(), getPublicationNamespaces(), getPublications(), getPublicationTables(), getRules(), getSubscriptions(), getSubscriptionTables(), getTableAttrs(), getTables(), getTransforms(), getTriggers(), getTSConfigurations(), getTSDictionaries(), getTSParsers(), getTSTemplates(), getTypes(), old_9_6_invalidate_hash_indexes(), processExtensionTables(), report_extension_updates(), set_frozenxids(), and show_binary_results().

◆ PQfreemem()

◆ PQfreeNotify()

void PQfreeNotify ( PGnotify notify)

Definition at line 4049 of file fe-exec.c.

4050 {
4051  PQfreemem(notify);
4052 }
void PQfreemem(void *ptr)
Definition: fe-exec.c:4032

References PQfreemem().

◆ PQfsize()

int PQfsize ( const PGresult res,
int  field_num 
)

Definition at line 3730 of file fe-exec.c.

3731 {
3732  if (!check_field_number(res, field_num))
3733  return 0;
3734  if (res->attDescs)
3735  return res->attDescs[field_num].typlen;
3736  else
3737  return 0;
3738 }

References pg_result::attDescs, check_field_number(), res, and pgresAttDesc::typlen.

Referenced by ecpg_build_compat_sqlda(), and ECPGget_desc().

◆ PQftable()

Oid PQftable ( const PGresult res,
int  field_num 
)

Definition at line 3686 of file fe-exec.c.

3687 {
3688  if (!check_field_number(res, field_num))
3689  return InvalidOid;
3690  if (res->attDescs)
3691  return res->attDescs[field_num].tableid;
3692  else
3693  return InvalidOid;
3694 }
#define InvalidOid
Definition: postgres_ext.h:36

References pg_result::attDescs, check_field_number(), InvalidOid, res, and pgresAttDesc::tableid.

◆ PQftablecol()

int PQftablecol ( const PGresult res,
int  field_num 
)

Definition at line 3697 of file fe-exec.c.

3698 {
3699  if (!check_field_number(res, field_num))
3700  return 0;
3701  if (res->attDescs)
3702  return res->attDescs[field_num].columnid;
3703  else
3704  return 0;
3705 }
int columnid
Definition: libpq-fe.h:276

References pg_result::attDescs, check_field_number(), pgresAttDesc::columnid, and res.

◆ PQftype()

Oid PQftype ( const PGresult res,
int  field_num 
)

◆ PQgetCopyData()

int PQgetCopyData ( PGconn conn,
char **  buffer,
int  async 
)

Definition at line 2816 of file fe-exec.c.

2817 {
2818  *buffer = NULL; /* for all failure cases */
2819  if (!conn)
2820  return -2;
2821  if (conn->asyncStatus != PGASYNC_COPY_OUT &&
2823  {
2824  libpq_append_conn_error(conn, "no COPY in progress");
2825  return -2;
2826  }
2827  return pqGetCopyData3(conn, buffer, async);
2828 }
int pqGetCopyData3(PGconn *conn, char **buffer, int async)

References pg_conn::asyncStatus, conn, libpq_append_conn_error(), PGASYNC_COPY_BOTH, PGASYNC_COPY_OUT, and pqGetCopyData3().

Referenced by CopyStreamReceive(), dumpTableData_copy(), ecpg_process_output(), handleCopyOut(), libpqrcv_receive(), ReceiveCopyData(), and StreamLogicalLog().

◆ PQgetisnull()

int PQgetisnull ( const PGresult res,
int  tup_num,
int  field_num 
)

Definition at line 3901 of file fe-exec.c.

3902 {
3903  if (!check_tuple_field_number(res, tup_num, field_num))
3904  return 1; /* pretend it is null */
3905  if (res->tuples[tup_num][field_num].len == NULL_LEN)
3906  return 1;
3907  else
3908  return 0;
3909 }
static int check_tuple_field_number(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3525
#define NULL_LEN
Definition: libpq-int.h:136

References check_tuple_field_number(), pgresAttValue::len, NULL_LEN, res, and pg_result::tuples.

Referenced by addFooterToPublicationDesc(), BaseBackup(), compile_database_list(), compile_relation_list_one_db(), describeOneTableDetails(), dumpAgg(), dumpBaseType(), dumpCollation(), dumpDatabase(), dumpDomain(), dumpFunc(), dumpRangeType(), dumpRoles(), dumpTableData_insert(), ecpg_get_data(), ecpg_set_compat_sqlda(), ecpg_set_native_sqlda(), ECPGget_desc(), ExecQueryTuples(), get_template0_info(), getAggregates(), getExtendedStatistics(), getForeignDataWrappers(), getForeignServers(), getFuncs(), getLOs(), getNamespaces(), getPolicies(), getProcLangs(), getPublicationTables(), GetSlotInformation(), getSubscriptions(), getSubscriptionTables(), getTableAttrs(), GetTableInfo(), getTables(), getTSDictionaries(), getTypes(), libpq_fetch_file(), libpq_traverse_files(), libpqrcv_create_slot(), libpqrcv_processTuples(), listTSConfigsVerbose(), listTSParsersVerbose(), make_tuple_from_result_row(), materializeResult(), postgresImportForeignSchema(), printCrosstab(), printQuery(), PrintResultInCrosstab(), process_queued_fetch_requests(), run_simple_query(), RunIdentifySystem(), sqlda_common_total_size(), StoreQueryTuple(), storeRow(), vacuum_one_database(), and verify_heap_slot_handler().

◆ PQgetlength()

int PQgetlength ( const PGresult res,
int  tup_num,
int  field_num 
)

Definition at line 3887 of file fe-exec.c.

3888 {
3889  if (!check_tuple_field_number(res, tup_num, field_num))
3890  return 0;
3891  if (res->tuples[tup_num][field_num].len != NULL_LEN)
3892  return res->tuples[tup_num][field_num].len;
3893  else
3894  return 0;
3895 }

References check_tuple_field_number(), pgresAttValue::len, NULL_LEN, res, and pg_result::tuples.

Referenced by createViewAsClause(), do_field(), ecpg_get_data(), ecpg_store_result(), ECPGget_desc(), libpq_fetch_file(), libpqrcv_readtimelinehistoryfile(), PQdisplayTuples(), process_queued_fetch_requests(), and show_binary_results().

◆ PQgetline()

int PQgetline ( PGconn conn,
char *  buffer,
int  length 
)

Definition at line 2854 of file fe-exec.c.

2855 {
2856  if (!buffer || length <= 0)
2857  return EOF;
2858  *buffer = '\0';
2859  /* length must be at least 3 to hold the \. terminator! */
2860  if (length < 3)
2861  return EOF;
2862 
2863  if (!conn)
2864  return EOF;
2865 
2866  return pqGetline3(conn, buffer, length);
2867 }
int pqGetline3(PGconn *conn, char *s, int maxlen)

References conn, and pqGetline3().

◆ PQgetlineAsync()

int PQgetlineAsync ( PGconn conn,
char *  buffer,
int  bufsize 
)

Definition at line 2901 of file fe-exec.c.

2902 {
2903  if (!conn)
2904  return -1;
2905 
2906  return pqGetlineAsync3(conn, buffer, bufsize);
2907 }
int pqGetlineAsync3(PGconn *conn, char *buffer, int bufsize)
#define bufsize
Definition: indent_globs.h:36

References bufsize, conn, and pqGetlineAsync3().

Referenced by pqGetline3().

◆ PQgetResult()

PGresult* PQgetResult ( PGconn conn)

Definition at line 2062 of file fe-exec.c.

2063 {
2064  PGresult *res;
2065 
2066  if (!conn)
2067  return NULL;
2068 
2069  /* Parse any available data, if our state permits. */
2070  parseInput(conn);
2071 
2072  /* If not ready to return something, block until we are. */
2073  while (conn->asyncStatus == PGASYNC_BUSY)
2074  {
2075  int flushResult;
2076 
2077  /*
2078  * If data remains unsent, send it. Else we might be waiting for the
2079  * result of a command the backend hasn't even got yet.
2080  */
2081  while ((flushResult = pqFlush(conn)) > 0)
2082  {
2083  if (pqWait(false, true, conn))
2084  {
2085  flushResult = -1;
2086  break;
2087  }
2088  }
2089 
2090  /*
2091  * Wait for some more data, and load it. (Note: if the connection has
2092  * been lost, pqWait should return immediately because the socket
2093  * should be read-ready, either with the last server data or with an
2094  * EOF indication. We expect therefore that this won't result in any
2095  * undue delay in reporting a previous write failure.)
2096  */
2097  if (flushResult ||
2098  pqWait(true, false, conn) ||
2099  pqReadData(conn) < 0)
2100  {
2101  /* Report the error saved by pqWait or pqReadData */
2104  return pqPrepareAsyncResult(conn);
2105  }
2106 
2107  /* Parse it. */
2108  parseInput(conn);
2109 
2110  /*
2111  * If we had a write error, but nothing above obtained a query result
2112  * or detected a read error, report the write error.
2113  */
2115  {
2118  return pqPrepareAsyncResult(conn);
2119  }
2120  }
2121 
2122  /* Return the appropriate thing. */
2123  switch (conn->asyncStatus)
2124  {
2125  case PGASYNC_IDLE:
2126  res = NULL; /* query is complete */
2127  break;
2128  case PGASYNC_PIPELINE_IDLE:
2130 
2131  /*
2132  * We're about to return the NULL that terminates the round of
2133  * results from the current query; prepare to send the results of
2134  * the next query, if any, when we're called next. If there's no
2135  * next element in the command queue, this gets us in IDLE state.
2136  */
2138  res = NULL; /* query is complete */
2139  break;
2140 
2141  case PGASYNC_READY:
2143 
2144  /*
2145  * Normally pqPrepareAsyncResult will have left conn->result
2146  * empty. Otherwise, "res" must be a not-full PGRES_TUPLES_CHUNK
2147  * result, which we want to return to the caller while staying in
2148  * PGASYNC_READY state. Then the next call here will return the
2149  * empty PGRES_TUPLES_OK result that was restored from
2150  * saved_result, after which we can proceed.
2151  */
2152  if (conn->result)
2153  {
2155  break;
2156  }
2157 
2158  /* Advance the queue as appropriate */
2159  pqCommandQueueAdvance(conn, false,
2161 
2163  {
2164  /*
2165  * We're about to send the results of the current query. Set
2166  * us idle now, and ...
2167  */
2169 
2170  /*
2171  * ... in cases when we're sending a pipeline-sync result,
2172  * move queue processing forwards immediately, so that next
2173  * time we're called, we're prepared to return the next result
2174  * received from the server. In all other cases, leave the
2175  * queue state change for next time, so that a terminating
2176  * NULL result is sent.
2177  *
2178  * (In other words: we don't return a NULL after a pipeline
2179  * sync.)
2180  */
2183  }
2184  else
2185  {
2186  /* Set the state back to BUSY, allowing parsing to proceed. */
2188  }
2189  break;
2190  case PGASYNC_READY_MORE:
2192  /* Set the state back to BUSY, allowing parsing to proceed. */
2194  break;
2195  case PGASYNC_COPY_IN:
2197  break;
2198  case PGASYNC_COPY_OUT:
2200  break;
2201  case PGASYNC_COPY_BOTH:
2203  break;
2204  default:
2205  libpq_append_conn_error(conn, "unexpected asyncStatus: %d", (int) conn->asyncStatus);
2207  conn->asyncStatus = PGASYNC_IDLE; /* try to restore valid state */
2209  break;
2210  }
2211 
2212  /* Time to fire PGEVT_RESULTCREATE events, if there are any */
2213  if (res && res->nEvents > 0)
2215 
2216  return res;
2217 }
static void pqSaveWriteError(PGconn *conn)
Definition: fe-exec.c:820
void pqCommandQueueAdvance(PGconn *conn, bool isReadyForQuery, bool gotSync)
Definition: fe-exec.c:3142
static PGresult * getCopyResult(PGconn *conn, ExecStatusType copytype)
Definition: fe-exec.c:2224
static void parseInput(PGconn *conn)
Definition: fe-exec.c:2020
int pqWait(int forRead, int forWrite, PGconn *conn)
Definition: fe-misc.c:978
int PQfireResultCreateEvents(PGconn *conn, PGresult *res)
Definition: libpq-events.c:185
@ PGRES_TUPLES_CHUNK
Definition: libpq-fe.h:116
@ PGRES_PIPELINE_SYNC
Definition: libpq-fe.h:113
bool write_failed
Definition: libpq-int.h:484

References Assert, pg_conn::asyncStatus, conn, getCopyResult(), libpq_append_conn_error(), pg_result::nEvents, parseInput(), PGASYNC_BUSY, PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, PGASYNC_COPY_OUT, PGASYNC_IDLE, PGASYNC_PIPELINE_IDLE, PGASYNC_READY, PGASYNC_READY_MORE, PGRES_COPY_BOTH, PGRES_COPY_IN, PGRES_COPY_OUT, PGRES_PIPELINE_SYNC, PGRES_TUPLES_CHUNK, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, pqCommandQueueAdvance(), PQfireResultCreateEvents(), pqFlush(), pqPipelineProcessQueue(), pqPrepareAsyncResult(), pqReadData(), pqSaveErrorResult(), pqSaveWriteError(), pqWait(), res, pg_conn::result, pg_result::resultStatus, and pg_conn::write_failed.

Referenced by advanceConnectionState(), BaseBackup(), ClearOrSaveAllResults(), confirm_query_canceled_impl(), consumeQueryResult(), discardUntilSync(), dumpTableData_copy(), ecpg_process_output(), EndDBCopyMode(), ExecQueryAndProcessResults(), handleCopyIn(), handleCopyOut(), HandleEndOfCopyStream(), libpqrcv_PQgetResult(), libpqsrv_get_result(), pgfdw_finish_pre_commit_cleanup(), pgfdw_get_cleanup_result(), PQconnectPoll(), pqEndcopy3(), PQexecFinish(), PQexecStart(), process_queued_fetch_requests(), process_result(), readCommandResponse(), ReceiveCopyData(), ReceiveXlogStream(), StreamLogicalLog(), test_multi_pipelines(), test_nosync(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), test_transaction(), test_uniqviol(), try_complete_step(), and wait_on_slots().

◆ PQgetvalue()

char* PQgetvalue ( const PGresult res,
int  tup_num,
int  field_num 
)

Definition at line 3876 of file fe-exec.c.

3877 {
3878  if (!check_tuple_field_number(res, tup_num, field_num))
3879  return NULL;
3880  return res->tuples[tup_num][field_num].value;
3881 }

References check_tuple_field_number(), res, pg_result::tuples, and pgresAttValue::value.

Referenced by _check_database_version(), add_tablespace_footer(), addFooterToPublicationDesc(), append_depends_on_extension(), appendQualifiedRelation(), BaseBackup(), binary_upgrade_set_type_oids_by_type_oid(), buildMatViewRefreshDependencies(), check_and_drop_existing_subscriptions(), check_for_data_types_usage(), check_for_incompatible_polymorphics(), check_for_isn_and_int8_passing_mismatch(), check_for_pg_role_prefix(), check_for_tables_with_oids(), check_for_user_defined_encoding_conversions(), check_for_user_defined_postfix_ops(), check_is_install_user(), check_new_cluster_logical_replication_slots(), check_new_cluster_subscription_configuration(), check_old_cluster_subscription_state(), check_proper_datallowconn(), check_publisher(), check_subscriber(), cluster_all_databases(), collectBinaryUpgradeClassOids(), collectComments(), collectRoleNames(), collectSecLabels(), compile_database_list(), compile_relation_list_one_db(), convertTSFunction(), create_logical_replication_slot(), createViewAsClause(), describeOneTableDetails(), describePublications(), describeRoles(), describeTableDetails(), do_field(), drop_failover_replication_slots(), dropDBs(), dropRoles(), dropTablespaces(), dumpAgg(), dumpBaseType(), dumpCollation(), dumpCompositeType(), dumpCompositeTypeColComments(), dumpConversion(), dumpDatabase(), dumpDatabaseConfig(), dumpDatabases(), dumpDomain(), dumpEnumType(), dumpForeignServer(), dumpFunc(), dumpOpclass(), dumpOpfamily(), dumpOpr(), dumpRangeType(), dumpRoleGUCPrivs(), dumpRoleMembership(), dumpRoles(), dumpRule(), dumpSearchPath(), dumpSequence(), dumpSequenceData(), dumpStatisticsExt(), dumpTable(), dumpTableAttach(), dumpTableData_insert(), dumpTableSchema(), dumpTablespaces(), dumpTSConfig(), dumpTSDictionary(), dumpUserConfig(), dumpUserMappings(), ecpg_get_data(), ecpg_set_compat_sqlda(), ecpg_set_native_sqlda(), ecpg_store_result(), emitShSecLabels(), exec_command_password(), ExecQueryTuples(), expand_dbname_patterns(), expand_extension_name_patterns(), expand_foreign_server_name_patterns(), expand_schema_name_patterns(), expand_table_name_patterns(), generate_object_name(), get_create_object_cmd(), get_db_infos(), get_db_subscription_count(), get_language_name(), get_loadable_libraries(), get_next_possible_free_pg_type_oid(), get_old_cluster_logical_slot_infos(), get_parallel_object_list(), get_primary_sysid(), get_rel_infos(), get_remote_estimate(), get_synchronized_snapshot(), get_tablespace_paths(), get_template0_info(), getAccessMethods(), getAdditionalACLs(), getAggregates(), getCasts(), getCollations(), getConstraints(), getConversions(), getDefaultACLs(), getDependencies(), getDomainConstraints(), getEventTriggers(), getExtendedStatistics(), getExtensionMembership(), getExtensions(), getForeignDataWrappers(), getForeignServers(), getFormattedTypeName(), getFuncs(), getIndexes(), getInherits(), getLOs(), getNamespaces(), getOpclasses(), getOperators(), getOpfamilies(), getPartitioningInfo(), getPolicies(), getProcLangs(), getPublicationNamespaces(), getPublications(), getPublicationTables(), getRules(), GetSlotInformation(), getSubscriptions(), getSubscriptionTables(), getTableAttrs(), GetTableInfo(), getTables(), getTransforms(), getTriggers(), getTSConfigurations(), getTSDictionaries(), getTSParsers(), getTSTemplates(), getTypes(), libpq_fetch_file(), libpq_traverse_files(), libpqrcv_create_slot(), libpqrcv_endstreaming(), libpqrcv_identify_system(), libpqrcv_processTuples(), libpqrcv_readtimelinehistoryfile(), listExtensionContents(), listSchemas(), listTSConfigsVerbose(), listTSParsersVerbose(), lo_initialize(), lookup_object_oid(), main(), make_tuple_from_result_row(), materializeResult(), old_9_6_invalidate_hash_indexes(), postgresAnalyzeForeignTable(), postgresGetAnalyzeInfoForForeignTable(), postgresImportForeignSchema(), PQconnectPoll(), PQdisplayTuples(), PQencryptPasswordConn(), PQprintTuples(), printCrosstab(), printQuery(), PrintResultInCrosstab(), process_queued_fetch_requests(), process_result(), processExtensionTables(), readCommandResponse(), ReadEndOfStreamingResult(), ReceiveXlogStream(), reindex_all_databases(), report_extension_updates(), RetrieveDataDirCreatePerm(), RetrieveWalSegSize(), run_simple_query(), RunIdentifySystem(), server_is_in_recovery(), set_frozenxids(), set_replication_progress(), show_binary_results(), sql_exec(), sqlda_common_total_size(), StoreQueryTuple(), storeRow(), test_pipeline_abort(), test_singlerowmode(), test_transaction(), try_complete_step(), vacuum_all_databases(), vacuum_one_database(), vacuumlo(), verify_heap_slot_handler(), and wait_for_connection_state().

◆ pqInternalNotice()

void pqInternalNotice ( const PGNoticeHooks hooks,
const char *  fmt,
  ... 
)

Definition at line 938 of file fe-exec.c.

939 {
940  char msgBuf[1024];
941  va_list args;
942  PGresult *res;
943 
944  if (hooks->noticeRec == NULL)
945  return; /* nobody home to receive notice? */
946 
947  /* Format the message */
948  va_start(args, fmt);
949  vsnprintf(msgBuf, sizeof(msgBuf), libpq_gettext(fmt), args);
950  va_end(args);
951  msgBuf[sizeof(msgBuf) - 1] = '\0'; /* make real sure it's terminated */
952 
953  /* Make a PGresult to pass to the notice receiver */
955  if (!res)
956  return;
957  res->noticeHooks = *hooks;
958 
959  /*
960  * Set up fields of notice.
961  */
965  /* XXX should provide a SQLSTATE too? */
966 
967  /*
968  * Result text is always just the primary message + newline. If we can't
969  * allocate it, substitute "out of memory", as in pqSetResultError.
970  */
971  res->errMsg = (char *) pqResultAlloc(res, strlen(msgBuf) + 2, false);
972  if (res->errMsg)
973  sprintf(res->errMsg, "%s\n", msgBuf);
974  else
975  res->errMsg = libpq_gettext("out of memory\n");
976 
977  /*
978  * Pass to receiver, then free it.
979  */
981  PQclear(res);
982 }
void pqSaveMessageField(PGresult *res, char code, const char *value)
Definition: fe-exec.c:1060
void * pqResultAlloc(PGresult *res, size_t nBytes, bool isBinary)
Definition: fe-exec.c:563
@ PGRES_NONFATAL_ERROR
Definition: libpq-fe.h:109
static void const char * fmt
va_end(args)
va_start(args, fmt)
#define vsnprintf
Definition: port.h:237
#define sprintf
Definition: port.h:240
#define PG_DIAG_SEVERITY_NONLOCALIZED
Definition: postgres_ext.h:55
#define PG_DIAG_MESSAGE_PRIMARY
Definition: postgres_ext.h:57
#define PG_DIAG_SEVERITY
Definition: postgres_ext.h:54
PQnoticeReceiver noticeRec
Definition: libpq-int.h:155
void * noticeRecArg
Definition: libpq-int.h:156
char * errMsg
Definition: libpq-int.h:199

References generate_unaccent_rules::args, pg_result::errMsg, fmt, libpq_gettext, pg_result::noticeHooks, PGNoticeHooks::noticeRec, PGNoticeHooks::noticeRecArg, PG_DIAG_MESSAGE_PRIMARY, PG_DIAG_SEVERITY, PG_DIAG_SEVERITY_NONLOCALIZED, PGRES_NONFATAL_ERROR, PQclear(), PQmakeEmptyPGresult(), pqResultAlloc(), pqSaveMessageField(), res, sprintf, va_end(), va_start(), and vsnprintf.

Referenced by check_field_number(), check_param_number(), check_tuple_field_number(), PQcmdTuples(), pqEndcopy3(), pqGetInt(), pqParseInput3(), pqPutInt(), and PQsetvalue().

◆ PQisBusy()

int PQisBusy ( PGconn conn)

Definition at line 2031 of file fe-exec.c.

2032 {
2033  if (!conn)
2034  return false;
2035 
2036  /* Parse any available data, if our state permits. */
2037  parseInput(conn);
2038 
2039  /*
2040  * PQgetResult will return immediately in all states except BUSY. Also,
2041  * if we've detected read EOF and dropped the connection, we can expect
2042  * that PQgetResult will fail immediately. Note that we do *not* check
2043  * conn->write_failed here --- once that's become set, we know we have
2044  * trouble, but we need to keep trying to read until we have a complete
2045  * server message or detect read EOF.
2046  */
2048 }

References pg_conn::asyncStatus, conn, CONNECTION_BAD, parseInput(), PGASYNC_BUSY, and pg_conn::status.

Referenced by advanceConnectionState(), confirm_query_canceled_impl(), dblink_is_busy(), libpqrcv_PQgetResult(), libpqsrv_get_result(), pgfdw_get_cleanup_result(), PQconnectPoll(), pqEndcopy3(), test_disallowed_in_pipeline(), test_pipelined_insert(), test_uniqviol(), try_complete_step(), and wait_on_slots().

◆ PQisnonblocking()

int PQisnonblocking ( const PGconn conn)

Definition at line 3983 of file fe-exec.c.

3984 {
3985  if (!conn || conn->status == CONNECTION_BAD)
3986  return false;
3987  return pqIsnonblocking(conn);
3988 }

References conn, CONNECTION_BAD, pqIsnonblocking, and pg_conn::status.

Referenced by test_disallowed_in_pipeline(), and test_simple_pipeline().

◆ PQisthreadsafe()

int PQisthreadsafe ( void  )

Definition at line 3992 of file fe-exec.c.

3993 {
3994  return true;
3995 }

◆ PQmakeEmptyPGresult()

PGresult* PQmakeEmptyPGresult ( PGconn conn,
ExecStatusType  status 
)

Definition at line 159 of file fe-exec.c.

160 {
161  PGresult *result;
162 
163  result = (PGresult *) malloc(sizeof(PGresult));
164  if (!result)
165  return NULL;
166 
167  result->ntups = 0;
168  result->numAttributes = 0;
169  result->attDescs = NULL;
170  result->tuples = NULL;
171  result->tupArrSize = 0;
172  result->numParameters = 0;
173  result->paramDescs = NULL;
174  result->resultStatus = status;
175  result->cmdStatus[0] = '\0';
176  result->binary = 0;
177  result->events = NULL;
178  result->nEvents = 0;
179  result->errMsg = NULL;
180  result->errFields = NULL;
181  result->errQuery = NULL;
182  result->null_field[0] = '\0';
183  result->curBlock = NULL;
184  result->curOffset = 0;
185  result->spaceLeft = 0;
186  result->memorySize = sizeof(PGresult);
187 
188  if (conn)
189  {
190  /* copy connection data we might need for operations on PGresult */
191  result->noticeHooks = conn->noticeHooks;
193 
194  /* consider copying conn's errorMessage */
195  switch (status)
196  {
197  case PGRES_EMPTY_QUERY:
198  case PGRES_COMMAND_OK:
199  case PGRES_TUPLES_OK:
200  case PGRES_COPY_OUT:
201  case PGRES_COPY_IN:
202  case PGRES_COPY_BOTH:
203  case PGRES_SINGLE_TUPLE:
204  case PGRES_TUPLES_CHUNK:
205  /* non-error cases */
206  break;
207  default:
208  /* we intentionally do not use or modify errorReported here */
209  pqSetResultError(result, &conn->errorMessage, 0);
210  break;
211  }
212 
213  /* copy events last; result must be valid if we need to PQclear */
214  if (conn->nEvents > 0)
215  {
216  result->events = dupEvents(conn->events, conn->nEvents,
217  &result->memorySize);
218  if (!result->events)
219  {
220  PQclear(result);
221  return NULL;
222  }
223  result->nEvents = conn->nEvents;
224  }
225  }
226  else
227  {
228  /* defaults... */
229  result->noticeHooks.noticeRec = NULL;
230  result->noticeHooks.noticeRecArg = NULL;
231  result->noticeHooks.noticeProc = NULL;
232  result->noticeHooks.noticeProcArg = NULL;
233  result->client_encoding = PG_SQL_ASCII;
234  }
235 
236  return result;
237 }
void pqSetResultError(PGresult *res, PQExpBuffer errorMessage, int offset)
Definition: fe-exec.c:692
@ PGRES_COMMAND_OK
Definition: libpq-fe.h:99
@ PGRES_SINGLE_TUPLE
Definition: libpq-fe.h:112
@ PGRES_EMPTY_QUERY
Definition: libpq-fe.h:98
struct pg_result PGresult
Definition: libpq-fe.h:181
@ PG_SQL_ASCII
Definition: pg_wchar.h:226
void * noticeProcArg
Definition: libpq-int.h:158
PQnoticeProcessor noticeProc
Definition: libpq-int.h:157
PQExpBufferData errorMessage
Definition: libpq-int.h:633
int nEvents
Definition: libpq-int.h:432
PGNoticeHooks noticeHooks
Definition: libpq-int.h:428
PGEvent * events
Definition: libpq-int.h:431
int curOffset
Definition: libpq-int.h:212
char null_field[1]
Definition: libpq-int.h:204
int spaceLeft
Definition: libpq-int.h:213
char * errQuery
Definition: libpq-int.h:201

References pg_result::attDescs, pg_result::binary, pg_result::client_encoding, pg_conn::client_encoding, pg_result::cmdStatus, conn, pg_result::curBlock, pg_result::curOffset, dupEvents(), pg_result::errFields, pg_result::errMsg, pg_conn::errorMessage, pg_result::errQuery, pg_result::events, pg_conn::events, malloc, pg_result::memorySize, pg_result::nEvents, pg_conn::nEvents, pg_result::noticeHooks, pg_conn::noticeHooks, PGNoticeHooks::noticeProc, PGNoticeHooks::noticeProcArg, PGNoticeHooks::noticeRec, PGNoticeHooks::noticeRecArg, pg_result::ntups, pg_result::null_field, pg_result::numAttributes, pg_result::numParameters, pg_result::paramDescs, PG_SQL_ASCII, PGRES_COMMAND_OK, PGRES_COPY_BOTH, PGRES_COPY_IN, PGRES_COPY_OUT, PGRES_EMPTY_QUERY, PGRES_SINGLE_TUPLE, PGRES_TUPLES_CHUNK, PGRES_TUPLES_OK, PQclear(), pqSetResultError(), pg_result::resultStatus, pg_result::spaceLeft, pg_result::tupArrSize, and pg_result::tuples.

Referenced by ECPGallocate_desc(), getCopyResult(), getCopyStart(), getParamDescriptions(), getRowDescriptions(), PQcopyResult(), pqFunctionCall3(), pqGetErrorNotice3(), pqInternalNotice(), pqParseInput3(), pqPipelineProcessQueue(), and pqPrepareAsyncResult().

◆ PQnfields()

◆ PQnotifies()

PGnotify* PQnotifies ( PGconn conn)

Definition at line 2667 of file fe-exec.c.

2668 {
2669  PGnotify *event;
2670 
2671  if (!conn)
2672  return NULL;
2673 
2674  /* Parse any available data to see if we can extract NOTIFY messages. */
2675  parseInput(conn);
2676 
2677  event = conn->notifyHead;
2678  if (event)
2679  {
2680  conn->notifyHead = event->next;
2681  if (!conn->notifyHead)
2682  conn->notifyTail = NULL;
2683  event->next = NULL; /* don't let app see the internal state */
2684  }
2685  return event;
2686 }
struct pgNotify * next
Definition: libpq-fe.h:201
PGnotify * notifyHead
Definition: libpq-int.h:450
PGnotify * notifyTail
Definition: libpq-int.h:451

References conn, pgNotify::next, pg_conn::notifyHead, pg_conn::notifyTail, and parseInput().

Referenced by dblink_get_notify(), ecpg_process_output(), main(), PrintNotifications(), and try_complete_step().

◆ PQnparams()

int PQnparams ( const PGresult res)

Definition at line 3915 of file fe-exec.c.

3916 {
3917  if (!res)
3918  return 0;
3919  return res->numParameters;
3920 }

References pg_result::numParameters, and res.

◆ PQntuples()

int PQntuples ( const PGresult res)

Definition at line 3481 of file fe-exec.c.

3482 {
3483  if (!res)
3484  return 0;
3485  return res->ntups;
3486 }

References pg_result::ntups, and res.

Referenced by add_tablespace_footer(), addFooterToPublicationDesc(), append_depends_on_extension(), appendQualifiedRelation(), BaseBackup(), buildMatViewRefreshDependencies(), check_and_drop_existing_subscriptions(), check_for_data_types_usage(), check_for_incompatible_polymorphics(), check_for_isn_and_int8_passing_mismatch(), check_for_pg_role_prefix(), check_for_prepared_transactions(), check_for_tables_with_oids(), check_for_user_defined_encoding_conversions(), check_for_user_defined_postfix_ops(), check_is_install_user(), check_new_cluster_logical_replication_slots(), check_new_cluster_subscription_configuration(), check_old_cluster_subscription_state(), check_proper_datallowconn(), cluster_all_databases(), collectBinaryUpgradeClassOids(), collectComments(), collectRoleNames(), collectSecLabels(), compile_database_list(), compile_relation_list_one_db(), create_publication(), CreateReplicationSlot(), createViewAsClause(), describeOneTableDetails(), describePublications(), describeRoles(), describeTableDetails(), drop_failover_replication_slots(), dropDBs(), DropReplicationSlot(), dropRoles(), dropTablespaces(), dumpCompositeType(), dumpCompositeTypeColComments(), dumpDatabase(), dumpDatabaseConfig(), dumpDatabases(), dumpEnumType(), dumpOpclass(), dumpOpfamily(), dumpRoleGUCPrivs(), dumpRoleMembership(), dumpRoles(), dumpRule(), dumpSequence(), dumpSequenceData(), dumpTable(), dumpTableData_insert(), dumpTablespaces(), dumpTSConfig(), dumpUserConfig(), dumpUserMappings(), ecpg_process_output(), ecpg_store_result(), ECPGget_desc(), emitShSecLabels(), ExecQueryAndProcessResults(), ExecQueryTuples(), execute_dml_stmt(), execute_foreign_modify(), ExecuteSqlQueryForSingleRow(), expand_dbname_patterns(), expand_extension_name_patterns(), expand_foreign_server_name_patterns(), expand_schema_name_patterns(), expand_table_name_patterns(), fetch_more_data(), generate_object_name(), get_create_object_cmd(), get_db_infos(), get_loadable_libraries(), get_old_cluster_logical_slot_infos(), get_parallel_object_list(), get_primary_sysid(), get_rel_infos(), get_tablespace_paths(), get_template0_info(), getAccessMethods(), getAdditionalACLs(), getAggregates(), getCasts(), getCollations(), getConstraints(), getConversions(), getDefaultACLs(), getDependencies(), getDomainConstraints(), getEventTriggers(), getExtendedStatistics(), getExtensionMembership(), getExtensions(), getForeignDataWrappers(), getForeignServers(), getFuncs(), getIndexes(), getInherits(), getLOs(), getNamespaces(), getOpclasses(), getOperators(), getOpfamilies(), getPartitioningInfo(), getPolicies(), getProcLangs(), getPublicationNamespaces(), getPublications(), getPublicationTables(), getRules(), GetSlotInformation(), getSubscriptions(), getSubscriptionTables(), getTableAttrs(), GetTableInfo(), getTables(), getTransforms(), getTriggers(), getTSConfigurations(), getTSDictionaries(), getTSParsers(), getTSTemplates(), getTypes(), libpq_fetch_file(), libpq_traverse_files(), libpqrcv_endstreaming(), libpqrcv_identify_system(), libpqrcv_processTuples(), libpqrcv_readtimelinehistoryfile(), listDbRoleSettings(), listExtensionContents(), listSchemas(), listTables(), listTSConfigsVerbose(), listTSParsersVerbose(), lo_initialize(), lookup_object_oid(), main(), make_tuple_from_result_row(), materializeResult(), old_9_6_invalidate_hash_indexes(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresGetAnalyzeInfoForForeignTable(), postgresImportForeignSchema(), PQconnectPoll(), PQdisplayTuples(), PQencryptPasswordConn(), PQprint(), PQprintTuples(), printCrosstab(), printQuery(), PrintResultInCrosstab(), process_queued_fetch_requests(), processExtensionTables(), readCommandResponse(), ReadEndOfStreamingResult(), ReceiveXlogStream(), reindex_all_databases(), report_extension_updates(), RetrieveDataDirCreatePerm(), RetrieveWalSegSize(), run_simple_query(), RunIdentifySystem(), set_frozenxids(), set_replication_progress(), show_binary_results(), sql_exec(), StoreQueryTuple(), storeRow(), test_pipeline_abort(), test_singlerowmode(), test_transaction(), try_complete_step(), vacuum_all_databases(), vacuum_one_database(), vacuumlo(), verify_btree_slot_handler(), verify_heap_slot_handler(), and wait_for_connection_state().

◆ PQoidStatus()

char* PQoidStatus ( const PGresult res)

Definition at line 3765 of file fe-exec.c.

3766 {
3767  /*
3768  * This must be enough to hold the result. Don't laugh, this is better
3769  * than what this function used to do.
3770  */
3771  static char buf[24];
3772 
3773  size_t len;
3774 
3775  if (!res || strncmp(res->cmdStatus, "INSERT ", 7) != 0)
3776  return "";
3777 
3778  len = strspn(res->cmdStatus + 7, "0123456789");
3779  if (len > sizeof(buf) - 1)
3780  len = sizeof(buf) - 1;
3781  memcpy(buf, res->cmdStatus + 7, len);
3782  buf[len] = '\0';
3783 
3784  return buf;
3785 }
static char * buf
Definition: pg_test_fsync.c:73

References buf, pg_result::cmdStatus, len, and res.

◆ PQoidValue()

Oid PQoidValue ( const PGresult res)

Definition at line 3793 of file fe-exec.c.

3794 {
3795  char *endptr = NULL;
3796  unsigned long result;
3797 
3798  if (!res ||
3799  strncmp(res->cmdStatus, "INSERT ", 7) != 0 ||
3800  res->cmdStatus[7] < '0' ||
3801  res->cmdStatus[7] > '9')
3802  return InvalidOid;
3803 
3804  result = strtoul(res->cmdStatus + 7, &endptr, 10);
3805 
3806  if (!endptr || (*endptr != ' ' && *endptr != '\0'))
3807  return InvalidOid;
3808  else
3809  return (Oid) result;
3810 }
unsigned int Oid
Definition: postgres_ext.h:31

References pg_result::cmdStatus, InvalidOid, and res.

Referenced by ecpg_process_output(), and PrintQueryStatus().

◆ PQparamtype()

Oid PQparamtype ( const PGresult res,
int  param_num 
)

Definition at line 3926 of file fe-exec.c.

3927 {
3928  if (!check_param_number(res, param_num))
3929  return InvalidOid;
3930  if (res->paramDescs)
3931  return res->paramDescs[param_num].typid;
3932  else
3933  return InvalidOid;
3934 }
static int check_param_number(const PGresult *res, int param_num)
Definition: fe-exec.c:3548

References check_param_number(), InvalidOid, pg_result::paramDescs, res, and pgresParamDesc::typid.

◆ pqPipelineFlush()

static int pqPipelineFlush ( PGconn conn)
static

Definition at line 4016 of file fe-exec.c.

4017 {
4018  if ((conn->pipelineStatus != PQ_PIPELINE_ON) ||
4020  return pqFlush(conn);
4021  return 0;
4022 }
#define OUTBUFFER_THRESHOLD
Definition: libpq-int.h:905
int outCount
Definition: libpq-int.h:531

References conn, OUTBUFFER_THRESHOLD, pg_conn::outCount, pg_conn::pipelineStatus, PQ_PIPELINE_ON, and pqFlush().

Referenced by pqPipelineSyncInternal(), PQsendFlushRequest(), PQsendPrepare(), PQsendQueryGuts(), and PQsendTypedCommand().

◆ pqPipelineProcessQueue()

static void pqPipelineProcessQueue ( PGconn conn)
static

Definition at line 3180 of file fe-exec.c.

3181 {
3182  switch (conn->asyncStatus)
3183  {
3184  case PGASYNC_COPY_IN:
3185  case PGASYNC_COPY_OUT:
3186  case PGASYNC_COPY_BOTH:
3187  case PGASYNC_READY:
3188  case PGASYNC_READY_MORE:
3189  case PGASYNC_BUSY:
3190  /* client still has to process current query or results */
3191  return;
3192 
3193  case PGASYNC_IDLE:
3194 
3195  /*
3196  * If we're in IDLE mode and there's some command in the queue,
3197  * get us into PIPELINE_IDLE mode and process normally. Otherwise
3198  * there's nothing for us to do.
3199  */
3200  if (conn->cmd_queue_head != NULL)
3201  {
3203  break;
3204  }
3205  return;
3206 
3207  case PGASYNC_PIPELINE_IDLE:
3209  /* next query please */
3210  break;
3211  }
3212 
3213  /*
3214  * Reset partial-result mode. (Client has to set it up for each query, if
3215  * desired.)
3216  */
3217  conn->partialResMode = false;
3218  conn->singleRowMode = false;
3219  conn->maxChunkSize = 0;
3220 
3221  /*
3222  * If there are no further commands to process in the queue, get us in
3223  * "real idle" mode now.
3224  */
3225  if (conn->cmd_queue_head == NULL)
3226  {
3228  return;
3229  }
3230 
3231  /*
3232  * Reset the error state. This and the next couple of steps correspond to
3233  * what PQsendQueryStart didn't do for this query.
3234  */
3236 
3237  /* Initialize async result-accumulation state */
3239 
3242  {
3243  /*
3244  * In an aborted pipeline we don't get anything from the server for
3245  * each result; we're just discarding commands from the queue until we
3246  * get to the next sync from the server.
3247  *
3248  * The PGRES_PIPELINE_ABORTED results tell the client that its queries
3249  * got aborted.
3250  */
3252  if (!conn->result)
3253  {
3254  libpq_append_conn_error(conn, "out of memory");
3256  return;
3257  }
3259  }
3260  else
3261  {
3262  /* allow parsing to continue */
3264  }
3265 }
void pqClearAsyncResult(PGconn *conn)
Definition: fe-exec.c:779
@ PGRES_PIPELINE_ABORTED
Definition: libpq-fe.h:114
int maxChunkSize
Definition: libpq-int.h:446
bool singleRowMode
Definition: libpq-int.h:445
bool partialResMode
Definition: libpq-int.h:444

References Assert, pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, libpq_append_conn_error(), pg_conn::maxChunkSize, pg_conn::partialResMode, PGASYNC_BUSY, PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, PGASYNC_COPY_OUT, PGASYNC_IDLE, PGASYNC_PIPELINE_IDLE, PGASYNC_READY, PGASYNC_READY_MORE, PGQUERY_SYNC, PGRES_PIPELINE_ABORTED, pg_conn::pipelineStatus, PQ_PIPELINE_ABORTED, PQ_PIPELINE_OFF, pqClearAsyncResult(), pqClearConnErrorState, PQmakeEmptyPGresult(), pqSaveErrorResult(), PGcmdQueueEntry::queryclass, pg_conn::result, and pg_conn::singleRowMode.

Referenced by pqAppendCmdQueueEntry(), and PQgetResult().

◆ PQpipelineSync()

int PQpipelineSync ( PGconn conn)

Definition at line 3272 of file fe-exec.c.

3273 {
3274  return pqPipelineSyncInternal(conn, true);
3275 }
static int pqPipelineSyncInternal(PGconn *conn, bool immediate_flush)
Definition: fe-exec.c:3294

References conn, and pqPipelineSyncInternal().

Referenced by discardUntilSync(), executeMetaCommand(), test_multi_pipelines(), test_pipeline_abort(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), and test_transaction().

◆ pqPipelineSyncInternal()

static int pqPipelineSyncInternal ( PGconn conn,
bool  immediate_flush 
)
static

Definition at line 3294 of file fe-exec.c.

3295 {
3296  PGcmdQueueEntry *entry;
3297 
3298  if (!conn)
3299  return 0;
3300 
3302  {
3303  libpq_append_conn_error(conn, "cannot send pipeline when not in pipeline mode");
3304  return 0;
3305  }
3306 
3307  switch (conn->asyncStatus)
3308  {
3309  case PGASYNC_COPY_IN:
3310  case PGASYNC_COPY_OUT:
3311  case PGASYNC_COPY_BOTH:
3312  /* should be unreachable */
3314  "internal error: cannot send pipeline while in COPY\n");
3315  return 0;
3316  case PGASYNC_READY:
3317  case PGASYNC_READY_MORE:
3318  case PGASYNC_BUSY:
3319  case PGASYNC_IDLE:
3320  case PGASYNC_PIPELINE_IDLE:
3321  /* OK to send sync */
3322  break;
3323  }
3324 
3325  entry = pqAllocCmdQueueEntry(conn);
3326  if (entry == NULL)
3327  return 0; /* error msg already set */
3328 
3329  entry->queryclass = PGQUERY_SYNC;
3330  entry->query = NULL;
3331 
3332  /* construct the Sync message */
3333  if (pqPutMsgStart(PqMsg_Sync, conn) < 0 ||
3334  pqPutMsgEnd(conn) < 0)
3335  goto sendFailed;
3336 
3337  /*
3338  * Give the data a push. In nonblock mode, don't complain if we're unable
3339  * to send it all; PQgetResult() will do any additional flushing needed.
3340  * If immediate_flush is disabled, the data is pushed if we are past the
3341  * size threshold.
3342  */
3343  if (immediate_flush)
3344  {
3345  if (pqFlush(conn) < 0)
3346  goto sendFailed;
3347  }
3348  else
3349  {
3350  if (pqPipelineFlush(conn) < 0)
3351  goto sendFailed;
3352  }
3353 
3354  /* OK, it's launched! */
3355  pqAppendCmdQueueEntry(conn, entry);
3356 
3357  return 1;
3358 
3359 sendFailed:
3360  pqRecycleCmdQueueEntry(conn, entry);
3361  /* error message should be set up already */
3362  return 0;
3363 }
static void pqAppendCmdQueueEntry(PGconn *conn, PGcmdQueueEntry *entry)
Definition: fe-exec.c:1339
static int pqPipelineFlush(PGconn *conn)
Definition: fe-exec.c:4016
static PGcmdQueueEntry * pqAllocCmdQueueEntry(PGconn *conn)
Definition: fe-exec.c:1306
int pqPutMsgStart(char msg_type, PGconn *conn)
Definition: fe-misc.c:458
int pqPutMsgEnd(PGconn *conn)
Definition: fe-misc.c:517
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:367
#define PqMsg_Sync
Definition: protocol.h:27

References appendPQExpBufferStr(), pg_conn::asyncStatus, conn, pg_conn::errorMessage, libpq_append_conn_error(), PGASYNC_BUSY, PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, PGASYNC_COPY_OUT, PGASYNC_IDLE, PGASYNC_PIPELINE_IDLE, PGASYNC_READY, PGASYNC_READY_MORE, PGQUERY_SYNC, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, pqAllocCmdQueueEntry(), pqAppendCmdQueueEntry(), pqFlush(), PqMsg_Sync, pqPipelineFlush(), pqPutMsgEnd(), pqPutMsgStart(), pqRecycleCmdQueueEntry(), PGcmdQueueEntry::query, and PGcmdQueueEntry::queryclass.

Referenced by PQpipelineSync(), and PQsendPipelineSync().

◆ PQprepare()

PGresult* PQprepare ( PGconn conn,
const char *  stmtName,
const char *  query,
int  nParams,
const Oid paramTypes 
)

Definition at line 2306 of file fe-exec.c.

2309 {
2310  if (!PQexecStart(conn))
2311  return NULL;
2312  if (!PQsendPrepare(conn, stmtName, query, nParams, paramTypes))
2313  return NULL;
2314  return PQexecFinish(conn);
2315 }
int PQsendPrepare(PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes)
Definition: fe-exec.c:1536

References conn, PQexecFinish(), PQexecStart(), and PQsendPrepare().

Referenced by DescribeQuery(), init_libpq_conn(), main(), prepare_common(), prepareCommand(), and test_uniqviol().

◆ pqPrepareAsyncResult()

PGresult* pqPrepareAsyncResult ( PGconn conn)

Definition at line 851 of file fe-exec.c.

852 {
853  PGresult *res;
854 
855  res = conn->result;
856  if (res)
857  {
858  /*
859  * If the pre-existing result is an ERROR (presumably something
860  * received from the server), assume that it represents whatever is in
861  * conn->errorMessage, and advance errorReported.
862  */
865  }
866  else
867  {
868  /*
869  * We get here after internal-to-libpq errors. We should probably
870  * always have error_result = true, but if we don't, gin up some error
871  * text.
872  */
873  if (!conn->error_result)
874  libpq_append_conn_error(conn, "no error text available");
875 
876  /* Paranoia: be sure errorReported offset is sane */
877  if (conn->errorReported < 0 ||
879  conn->errorReported = 0;
880 
881  /*
882  * Make a PGresult struct for the error. We temporarily lie about the
883  * result status, so that PQmakeEmptyPGresult doesn't uselessly copy
884  * all of conn->errorMessage.
885  */
887  if (res)
888  {
889  /*
890  * Report whatever new error text we have, and advance
891  * errorReported.
892  */
896  }
897  else
898  {
899  /*
900  * Ouch, not enough memory for a PGresult. Fortunately, we have a
901  * card up our sleeve: we can use the static OOM_result. Casting
902  * away const here is a bit ugly, but it seems best to declare
903  * OOM_result as const, in hopes it will be allocated in read-only
904  * storage.
905  */
907 
908  /*
909  * Don't advance errorReported. Perhaps we'll be able to report
910  * the text later.
911  */
912  }
913  }
914 
915  /*
916  * Replace conn->result with saved_result, if any. In the normal case
917  * there isn't a saved result and we're just dropping ownership of the
918  * current result. In partial-result mode this restores the situation to
919  * what it was before we created the current partial result.
920  */
922  conn->error_result = false; /* saved_result is never an error */
923  conn->saved_result = NULL;
924 
925  return res;
926 }
#define unconstify(underlying_type, expr)
Definition: c.h:1245
@ PGRES_FATAL_ERROR
Definition: libpq-fe.h:110
int errorReported
Definition: libpq-int.h:634

References conn, pg_conn::error_result, pg_conn::errorMessage, pg_conn::errorReported, PQExpBufferData::len, libpq_append_conn_error(), OOM_result, PGRES_EMPTY_QUERY, PGRES_FATAL_ERROR, PQmakeEmptyPGresult(), pqSetResultError(), res, pg_conn::result, pg_result::resultStatus, pg_conn::saved_result, and unconstify.

Referenced by getCopyResult(), pqFunctionCall3(), and PQgetResult().

◆ PQputCopyData()

int PQputCopyData ( PGconn conn,
const char *  buffer,
int  nbytes 
)

Definition at line 2695 of file fe-exec.c.

2696 {
2697  if (!conn)
2698  return -1;
2699  if (conn->asyncStatus != PGASYNC_COPY_IN &&
2701  {
2702  libpq_append_conn_error(conn, "no COPY in progress");
2703  return -1;
2704  }
2705 
2706  /*
2707  * Process any NOTICE or NOTIFY messages that might be pending in the
2708  * input buffer. Since the server might generate many notices during the
2709  * COPY, we want to clean those out reasonably promptly to prevent
2710  * indefinite expansion of the input buffer. (Note: the actual read of
2711  * input data into the input buffer happens down inside pqSendSome, but
2712  * it's not authorized to get rid of the data again.)
2713  */
2714  parseInput(conn);
2715 
2716  if (nbytes > 0)
2717  {
2718  /*
2719  * Try to flush any previously sent data in preference to growing the
2720  * output buffer. If we can't enlarge the buffer enough to hold the
2721  * data, return 0 in the nonblock case, else hard error. (For
2722  * simplicity, always assume 5 bytes of overhead.)
2723  */
2724  if ((conn->outBufSize - conn->outCount - 5) < nbytes)
2725  {
2726  if (pqFlush(conn) < 0)
2727  return -1;
2728  if (pqCheckOutBufferSpace(conn->outCount + 5 + (size_t) nbytes,
2729  conn))
2730  return pqIsnonblocking(conn) ? 0 : -1;
2731  }
2732  /* Send the data (too simple to delegate to fe-protocol files) */
2733  if (pqPutMsgStart(PqMsg_CopyData, conn) < 0 ||
2734  pqPutnchar(buffer, nbytes, conn) < 0 ||
2735  pqPutMsgEnd(conn) < 0)
2736  return -1;
2737  }
2738  return 1;
2739 }
int pqCheckOutBufferSpace(size_t bytes_needed, PGconn *conn)
Definition: fe-misc.c:287
int pqPutnchar(const char *s, size_t len, PGconn *conn)
Definition: fe-misc.c:202
#define PqMsg_CopyData
Definition: protocol.h:65
int outBufSize
Definition: libpq-int.h:530

References pg_conn::asyncStatus, conn, libpq_append_conn_error(), pg_conn::outBufSize, pg_conn::outCount, parseInput(), PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, pqCheckOutBufferSpace(), pqFlush(), pqIsnonblocking, PqMsg_CopyData, pqPutMsgEnd(), pqPutMsgStart(), and pqPutnchar().

Referenced by BaseBackup(), ExecuteSqlCommandBuf(), handleCopyIn(), libpqrcv_send(), PQputnbytes(), and sendFeedback().

◆ PQputCopyEnd()

int PQputCopyEnd ( PGconn conn,
const char *  errormsg 
)

Definition at line 2749 of file fe-exec.c.

2750 {
2751  if (!conn)
2752  return -1;
2753  if (conn->asyncStatus != PGASYNC_COPY_IN &&
2755  {
2756  libpq_append_conn_error(conn, "no COPY in progress");
2757  return -1;
2758  }
2759 
2760  /*
2761  * Send the COPY END indicator. This is simple enough that we don't
2762  * bother delegating it to the fe-protocol files.
2763  */
2764  if (errormsg)
2765  {
2766  /* Send COPY FAIL */
2767  if (pqPutMsgStart(PqMsg_CopyFail, conn) < 0 ||
2768  pqPuts(errormsg, conn) < 0 ||
2769  pqPutMsgEnd(conn) < 0)
2770  return -1;
2771  }
2772  else
2773  {
2774  /* Send COPY DONE */
2775  if (pqPutMsgStart(PqMsg_CopyDone, conn) < 0 ||
2776  pqPutMsgEnd(conn) < 0)
2777  return -1;
2778  }
2779 
2780  /*
2781  * If we sent the COPY command in extended-query mode, we must issue a
2782  * Sync as well.
2783  */
2784  if (conn->cmd_queue_head &&
2786  {
2787  if (pqPutMsgStart(PqMsg_Sync, conn) < 0 ||
2788  pqPutMsgEnd(conn) < 0)
2789  return -1;
2790  }
2791 
2792  /* Return to active duty */
2795  else
2797 
2798  /* Try to flush data */
2799  if (pqFlush(conn) < 0)
2800  return -1;
2801 
2802  return 1;
2803 }
int pqPuts(const char *s, PGconn *conn)
Definition: fe-misc.c:152
#define PqMsg_CopyDone
Definition: protocol.h:64
#define PqMsg_CopyFail
Definition: protocol.h:29

References pg_conn::asyncStatus, pg_conn::cmd_queue_head, conn, libpq_append_conn_error(), PGASYNC_BUSY, PGASYNC_COPY_BOTH, PGASYNC_COPY_IN, PGASYNC_COPY_OUT, PGQUERY_SIMPLE, pqFlush(), PqMsg_CopyDone, PqMsg_CopyFail, PqMsg_Sync, pqPutMsgEnd(), pqPutMsgStart(), pqPuts(), and PGcmdQueueEntry::queryclass.

Referenced by BaseBackup(), CheckCopyStreamStop(), EndDBCopyMode(), handleCopyIn(), HandleEndOfCopyStream(), libpqrcv_endstreaming(), PQexecStart(), prepareToTerminate(), and ProcessXLogDataMsg().

◆ PQputline()

int PQputline ( PGconn conn,
const char *  string 
)

Definition at line 2918 of file fe-exec.c.

2919 {
2920  return PQputnbytes(conn, string, strlen(string));
2921 }
int PQputnbytes(PGconn *conn, const char *buffer, int nbytes)
Definition: fe-exec.c:2928

References conn, and PQputnbytes().

Referenced by initPopulateTable().

◆ PQputnbytes()

int PQputnbytes ( PGconn conn,
const char *  buffer,
int  nbytes 
)

Definition at line 2928 of file fe-exec.c.

2929 {
2930  if (PQputCopyData(conn, buffer, nbytes) > 0)
2931  return 0;
2932  else
2933  return EOF;
2934 }
int PQputCopyData(PGconn *conn, const char *buffer, int nbytes)
Definition: fe-exec.c:2695

References conn, and PQputCopyData().

Referenced by PQputline().

◆ pqRecycleCmdQueueEntry()

static void pqRecycleCmdQueueEntry ( PGconn conn,
PGcmdQueueEntry entry 
)
static

Definition at line 1386 of file fe-exec.c.

1387 {
1388  if (entry == NULL)
1389  return;
1390 
1391  /* recyclable entries should not have a follow-on command */
1392  Assert(entry->next == NULL);
1393 
1394  if (entry->query)
1395  {
1396  free(entry->query);
1397  entry->query = NULL;
1398  }
1399 
1400  entry->next = conn->cmd_queue_recycle;
1401  conn->cmd_queue_recycle = entry;
1402 }

References Assert, pg_conn::cmd_queue_recycle, conn, free, PGcmdQueueEntry::next, and PGcmdQueueEntry::query.

Referenced by pqCommandQueueAdvance(), pqPipelineSyncInternal(), PQsendPrepare(), PQsendQueryGuts(), PQsendQueryInternal(), and PQsendTypedCommand().

◆ PQresStatus()

char* PQresStatus ( ExecStatusType  status)

Definition at line 3419 of file fe-exec.c.

3420 {
3421  if ((unsigned int) status >= lengthof(pgresStatus))
3422  return libpq_gettext("invalid ExecStatusType code");
3423  return pgresStatus[status];
3424 }
#define lengthof(array)
Definition: c.h:788
char *const pgresStatus[]
Definition: fe-exec.c:32

References lengthof, libpq_gettext, and pgresStatus.

Referenced by BaseBackup(), process_result(), test_multi_pipelines(), test_nosync(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), test_transaction(), and try_complete_step().

◆ PQresultAlloc()

void* PQresultAlloc ( PGresult res,
size_t  nBytes 
)

Definition at line 543 of file fe-exec.c.

544 {
545  /* Fail if argument is NULL or OOM_result */
546  if (!res || (const PGresult *) res == &OOM_result)
547  return NULL;
548 
549  return pqResultAlloc(res, nBytes, true);
550 }

References OOM_result, pqResultAlloc(), and res.

Referenced by PQsetResultAttrs().

◆ pqResultAlloc()

void* pqResultAlloc ( PGresult res,
size_t  nBytes,
bool  isBinary 
)

Definition at line 563 of file fe-exec.c.

564 {
565  char *space;
566  PGresult_data *block;
567 
568  if (!res)
569  return NULL;
570 
571  if (nBytes <= 0)
572  return res->null_field;
573 
574  /*
575  * If alignment is needed, round up the current position to an alignment
576  * boundary.
577  */
578  if (isBinary)
579  {
580  int offset = res->curOffset % PGRESULT_ALIGN_BOUNDARY;
581 
582  if (offset)
583  {
586  }
587  }
588 
589  /* If there's enough space in the current block, no problem. */
590  if (nBytes <= (size_t) res->spaceLeft)
591  {
592  space = res->curBlock->space + res->curOffset;
593  res->curOffset += nBytes;
594  res->spaceLeft -= nBytes;
595  return space;
596  }
597 
598  /*
599  * If the requested object is very large, give it its own block; this
600  * avoids wasting what might be most of the current block to start a new
601  * block. (We'd have to special-case requests bigger than the block size
602  * anyway.) The object is always given binary alignment in this case.
603  */
604  if (nBytes >= PGRESULT_SEP_ALLOC_THRESHOLD)
605  {
606  size_t alloc_size = nBytes + PGRESULT_BLOCK_OVERHEAD;
607 
608  block = (PGresult_data *) malloc(alloc_size);
609  if (!block)
610  return NULL;
611  res->memorySize += alloc_size;
612  space = block->space + PGRESULT_BLOCK_OVERHEAD;
613  if (res->curBlock)
614  {
615  /*
616  * Tuck special block below the active block, so that we don't
617  * have to waste the free space in the active block.
618  */
619  block->next = res->curBlock->next;
620  res->curBlock->next = block;
621  }
622  else
623  {
624  /* Must set up the new block as the first active block. */
625  block->next = NULL;
626  res->curBlock = block;
627  res->spaceLeft = 0; /* be sure it's marked full */
628  }
629  return space;
630  }
631 
632  /* Otherwise, start a new block. */
634  if (!block)
635  return NULL;
637  block->next = res->curBlock;
638  res->curBlock = block;
639  if (isBinary)
640  {
641  /* object needs full alignment */
644  }
645  else
646  {
647  /* we can cram it right after the overhead pointer */
648  res->curOffset = sizeof(PGresult_data);
650  }
651 
652  space = block->space + res->curOffset;
653  res->curOffset += nBytes;
654  res->spaceLeft -= nBytes;
655  return space;
656 }
#define PGRESULT_DATA_BLOCKSIZE
Definition: fe-exec.c:142
#define PGRESULT_BLOCK_OVERHEAD
Definition: fe-exec.c:144
#define PGRESULT_SEP_ALLOC_THRESHOLD
Definition: fe-exec.c:145
#define PGRESULT_ALIGN_BOUNDARY
Definition: fe-exec.c:143
union pgresult_data PGresult_data
Definition: libpq-int.h:104
char space[1]
Definition: libpq-int.h:109

References pg_result::curBlock, pg_result::curOffset, malloc, pg_result::memorySize, pgresult_data::next, pg_result::null_field, PGRESULT_ALIGN_BOUNDARY, PGRESULT_BLOCK_OVERHEAD, PGRESULT_DATA_BLOCKSIZE, PGRESULT_SEP_ALLOC_THRESHOLD, res, pgresult_data::space, and pg_result::spaceLeft.

Referenced by getCopyStart(), getParamDescriptions(), getRowDescriptions(), pqInternalNotice(), PQresultAlloc(), pqResultStrdup(), pqRowProcessor(), pqSaveMessageField(), and PQsetvalue().

◆ PQresultErrorField()

char* PQresultErrorField ( const PGresult res,
int  fieldcode 
)

Definition at line 3466 of file fe-exec.c.

3467 {
3468  PGMessageField *pfield;
3469 
3470  if (!res)
3471  return NULL;
3472  for (pfield = res->errFields; pfield != NULL; pfield = pfield->next)
3473  {
3474  if (pfield->code == fieldcode)
3475  return pfield->contents;
3476  }
3477  return NULL;
3478 }
struct pgMessageField * next
Definition: libpq-int.h:147
char contents[FLEXIBLE_ARRAY_MEMBER]
Definition: libpq-int.h:149

References pgMessageField::code, pgMessageField::contents, pg_result::errFields, pgMessageField::next, and res.

Referenced by BaseBackup(), confirm_query_canceled_impl(), CreateReplicationSlot(), dblink_res_error(), ecpg_raise_backend(), ECPGnoticeReceiver(), GetTableInfo(), libpqrcv_exec(), minimal_error_message(), pgfdw_report_error(), pgpassfileWarning(), pqBuildErrorMessage3(), PQconnectPoll(), readCommandResponse(), SetResultVariables(), should_processing_continue(), TableCommandResultHandler(), test_pipeline_abort(), and try_complete_step().

◆ PQresultErrorMessage()

◆ PQresultMemorySize()

size_t PQresultMemorySize ( const PGresult res)

Definition at line 663 of file fe-exec.c.

664 {
665  if (!res)
666  return 0;
667  return res->memorySize;
668 }

References pg_result::memorySize, and res.

◆ PQresultStatus()

ExecStatusType PQresultStatus ( const PGresult res)

Definition at line 3411 of file fe-exec.c.

3412 {
3413  if (!res)
3414  return PGRES_FATAL_ERROR;
3415  return res->resultStatus;
3416 }

References PGRES_FATAL_ERROR, res, and pg_result::resultStatus.

Referenced by _doSetSessionAuth(), _printTableAccessMethodNoStorage(), _selectOutputSchema(), _selectTableAccessMethod(), _selectTablespace(), AcceptResult(), advanceConnectionState(), BaseBackup(), check_and_drop_existing_subscriptions(), check_loadable_libraries(), check_prepare_conn(), check_publisher(), check_subscriber(), ClearOrSaveResult(), close_cursor(), compile_database_list(), compile_relation_list_one_db(), confirm_query_canceled_impl(), connect_database(), create_cursor(), create_logical_replication_slot(), create_publication(), create_subscription(), CreateReplicationSlot(), dblink_close(), dblink_exec(), dblink_fetch(), dblink_open(), dblink_record_internal(), deallocate_query(), DescribeQuery(), discardUntilSync(), do_sql_command_end(), drop_existing_subscriptions(), drop_failover_replication_slots(), drop_publication(), drop_replication_slot(), DropReplicationSlot(), dumpTableData_copy(), ecpg_check_PQresult(), ecpg_process_output(), enable_subscription(), EndDBCopyMode(), exec_command_password(), ExecQueryAndProcessResults(), execute_dml_stmt(), execute_foreign_modify(), executeCommand(), executeMaintenanceCommand(), executeQuery(), executeQueryOrDie(), ExecuteSqlCommand(), ExecuteSqlQuery(), ExecuteSqlStatement(), executeStatement(), fetch_more_data(), generate_object_name(), get_create_object_cmd(), get_primary_sysid(), get_remote_estimate(), GetConnection(), GetSlotInformation(), GetTableInfo(), handleCopyIn(), handleCopyOut(), HandleCopyResult(), HandleEndOfCopyStream(), init_libpq_conn(), initPopulateTable(), libpq_fetch_file(), libpq_traverse_files(), libpqrcv_alter_slot(), libpqrcv_connect(), libpqrcv_create_slot(), libpqrcv_endstreaming(), libpqrcv_exec(), libpqrcv_identify_system(), libpqrcv_PQexec(), libpqrcv_readtimelinehistoryfile(), libpqrcv_receive(), libpqrcv_startstreaming(), libpqsrv_get_result_last(), lo_close(), lo_creat(), lo_create(), lo_lseek(), lo_lseek64(), lo_open(), lo_read(), lo_tell(), lo_tell64(), lo_truncate(), lo_truncate64(), lo_unlink(), lo_write(), lockTableForWorker(), lookup_object_oid(), main(), materializeResult(), pgfdw_exec_cleanup_query_end(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresGetAnalyzeInfoForForeignTable(), postgresImportForeignSchema(), postgresReScanForeignScan(), PQconnectPoll(), PQencryptPasswordConn(), prepare_foreign_modify(), prepareCommand(), PrintQueryResult(), PrintQueryStatus(), PrintResultInCrosstab(), process_queued_fetch_requests(), process_result(), readCommandResponse(), ReceiveCopyData(), ReceiveXlogStream(), RetrieveDataDirCreatePerm(), RetrieveWalSegSize(), run_permutation(), run_simple_command(), run_simple_query(), RunIdentifySystem(), SendQuery(), server_is_in_recovery(), set_replication_progress(), should_processing_continue(), sql_conn(), sql_exec(), storeQueryResult(), StreamLogicalLog(), TableCommandResultHandler(), test_disallowed_in_pipeline(), test_multi_pipelines(), test_nosync(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), test_transaction(), test_uniqviol(), try_complete_step(), tryExecuteStatement(), vacuumlo(), verify_btree_slot_handler(), verify_heap_slot_handler(), and wait_for_connection_state().

◆ pqResultStrdup()

char* pqResultStrdup ( PGresult res,
const char *  str 
)

Definition at line 675 of file fe-exec.c.

676 {
677  char *space = (char *) pqResultAlloc(res, strlen(str) + 1, false);
678 
679  if (space)
680  strcpy(space, str);
681  return space;
682 }

References pqResultAlloc(), res, and str.

Referenced by getRowDescriptions(), pqGetErrorNotice3(), PQsetResultAttrs(), and pqSetResultError().

◆ PQresultVerboseErrorMessage()

char* PQresultVerboseErrorMessage ( const PGresult res,
PGVerbosity  verbosity,
PGContextVisibility  show_context 
)

Definition at line 3435 of file fe-exec.c.

3438 {
3439  PQExpBufferData workBuf;
3440 
3441  /*
3442  * Because the caller is expected to free the result string, we must
3443  * strdup any constant result. We use plain strdup and document that
3444  * callers should expect NULL if out-of-memory.
3445  */
3446  if (!res ||
3449  return strdup(libpq_gettext("PGresult is not an error result\n"));
3450 
3451  initPQExpBuffer(&workBuf);
3452 
3453  pqBuildErrorMessage3(&workBuf, res, verbosity, show_context);
3454 
3455  /* If insufficient memory to format the message, fail cleanly */
3456  if (PQExpBufferDataBroken(workBuf))
3457  {
3458  termPQExpBuffer(&workBuf);
3459  return strdup(libpq_gettext("out of memory\n"));
3460  }
3461 
3462  return workBuf.data;
3463 }
void pqBuildErrorMessage3(PQExpBuffer msg, const PGresult *res, PGVerbosity verbosity, PGContextVisibility show_context)
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:90
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:129
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67

References PQExpBufferData::data, initPQExpBuffer(), libpq_gettext, PGRES_FATAL_ERROR, PGRES_NONFATAL_ERROR, pqBuildErrorMessage3(), PQExpBufferDataBroken, res, pg_result::resultStatus, and termPQExpBuffer().

Referenced by exec_command_errverbose().

◆ pqRowProcessor()

int pqRowProcessor ( PGconn conn,
const char **  errmsgp 
)

Definition at line 1206 of file fe-exec.c.

1207 {
1208  PGresult *res = conn->result;
1209  int nfields = res->numAttributes;
1210  const PGdataValue *columns = conn->rowBuf;
1211  PGresAttValue *tup;
1212  int i;
1213 
1214  /*
1215  * In partial-result mode, if we don't already have a partial PGresult
1216  * then make one by cloning conn->result (which should hold the correct
1217  * result metadata by now). Then the original conn->result is moved over
1218  * to saved_result so that we can re-use it as a reference for future
1219  * partial results. The saved result will become active again after
1220  * pqPrepareAsyncResult() returns the partial result to the application.
1221  */
1222  if (conn->partialResMode && conn->saved_result == NULL)
1223  {
1224  /* Copy everything that should be in the result at this point */
1225  res = PQcopyResult(res,
1228  if (!res)
1229  return 0;
1230  /* Change result status to appropriate special value */
1232  /* And stash it as the active result */
1234  conn->result = res;
1235  }
1236 
1237  /*
1238  * Basically we just allocate space in the PGresult for each field and
1239  * copy the data over.
1240  *
1241  * Note: on malloc failure, we return 0 leaving *errmsgp still NULL, which
1242  * caller will take to mean "out of memory". This is preferable to trying
1243  * to set up such a message here, because evidently there's not enough
1244  * memory for gettext() to do anything.
1245  */
1246  tup = (PGresAttValue *)
1247  pqResultAlloc(res, nfields * sizeof(PGresAttValue), true);
1248  if (tup == NULL)
1249  return 0;
1250 
1251  for (i = 0; i < nfields; i++)
1252  {
1253  int clen = columns[i].len;
1254 
1255  if (clen < 0)
1256  {
1257  /* null field */
1258  tup[i].len = NULL_LEN;
1259  tup[i].value = res->null_field;
1260  }
1261  else
1262  {
1263  bool isbinary = (res->attDescs[i].format != 0);
1264  char *val;
1265 
1266  val = (char *) pqResultAlloc(res, clen + 1, isbinary);
1267  if (val == NULL)
1268  return 0;
1269 
1270  /* copy and zero-terminate the data (even if it's binary) */
1271  memcpy(val, columns[i].value, clen);
1272  val[clen] = '\0';
1273 
1274  tup[i].len = clen;
1275  tup[i].value = val;
1276  }
1277  }
1278 
1279  /* And add the tuple to the PGresult's tuple array */
1280  if (!pqAddTuple(res, tup, errmsgp))
1281  return 0;
1282 
1283  /*
1284  * Success. In partial-result mode, if we have enough rows then make the
1285  * result available to the client immediately.
1286  */
1289 
1290  return 1;
1291 }
PGresult * PQcopyResult(const PGresult *src, int flags)
Definition: fe-exec.c:318
static bool pqAddTuple(PGresult *res, PGresAttValue *tup, const char **errmsgp)
Definition: fe-exec.c:993
long val
Definition: informix.c:670
static struct @155 value
PGdataValue * rowBuf
Definition: libpq-int.h:539

References pg_conn::asyncStatus, pg_result::attDescs, conn, pgresAttDesc::format, i, pgresAttValue::len, pgDataValue::len, pg_conn::maxChunkSize, pg_result::ntups, pg_result::null_field, NULL_LEN, pg_result::numAttributes, pg_conn::partialResMode, PG_COPYRES_ATTRS, PG_COPYRES_EVENTS, PG_COPYRES_NOTICEHOOKS, PGASYNC_READY_MORE, PGRES_SINGLE_TUPLE, PGRES_TUPLES_CHUNK, pqAddTuple(), PQcopyResult(), pqResultAlloc(), res, pg_conn::result, pg_result::resultStatus, pg_conn::rowBuf, pg_conn::saved_result, pg_conn::singleRowMode, val, value, and pgresAttValue::value.

Referenced by getAnotherTuple().

◆ pqSaveErrorResult()

void pqSaveErrorResult ( PGconn conn)

Definition at line 803 of file fe-exec.c.

804 {
805  /* Drop any pending result ... */
807  /* ... and set flag to remember to make an error result later */
808  conn->error_result = true;
809 }

References conn, pg_conn::error_result, and pqClearAsyncResult().

Referenced by getAnotherTuple(), getCopyResult(), getParamDescriptions(), getRowDescriptions(), handleSyncLoss(), pqFunctionCall3(), PQgetResult(), pqParseInput3(), pqPipelineProcessQueue(), and pqSaveWriteError().

◆ pqSaveMessageField()

void pqSaveMessageField ( PGresult res,
char  code,
const char *  value 
)

Definition at line 1060 of file fe-exec.c.

1061 {
1062  PGMessageField *pfield;
1063 
1064  pfield = (PGMessageField *)
1066  offsetof(PGMessageField, contents) +
1067  strlen(value) + 1,
1068  true);
1069  if (!pfield)
1070  return; /* out of memory? */
1071  pfield->code = code;
1072  strcpy(pfield->contents, value);
1073  pfield->next = res->errFields;
1074  res->errFields = pfield;
1075 }

References pgMessageField::code, pgMessageField::contents, pg_result::errFields, pgMessageField::next, pqResultAlloc(), res, and value.

Referenced by pqGetErrorNotice3(), and pqInternalNotice().

◆ pqSaveParameterStatus()

void pqSaveParameterStatus ( PGconn conn,
const char *  name,
const char *  value 
)

Definition at line 1081 of file fe-exec.c.

1082 {
1083  pgParameterStatus *pstatus;
1084  pgParameterStatus *prev;
1085 
1086  /*
1087  * Forget any old information about the parameter
1088  */
1089  for (pstatus = conn->pstatus, prev = NULL;
1090  pstatus != NULL;
1091  prev = pstatus, pstatus = pstatus->next)
1092  {
1093  if (strcmp(pstatus->name, name) == 0)
1094  {
1095  if (prev)
1096  prev->next = pstatus->next;
1097  else
1098  conn->pstatus = pstatus->next;
1099  free(pstatus); /* frees name and value strings too */
1100  break;
1101  }
1102  }
1103 
1104  /*
1105  * Store new info as a single malloc block
1106  */
1107  pstatus = (pgParameterStatus *) malloc(sizeof(pgParameterStatus) +
1108  strlen(name) + strlen(value) + 2);
1109  if (pstatus)
1110  {
1111  char *ptr;
1112 
1113  ptr = ((char *) pstatus) + sizeof(pgParameterStatus);
1114  pstatus->name = ptr;
1115  strcpy(ptr, name);
1116  ptr += strlen(name) + 1;
1117  pstatus->value = ptr;
1118  strcpy(ptr, value);
1119  pstatus->next = conn->pstatus;
1120  conn->pstatus = pstatus;
1121  }
1122 
1123  /*
1124  * Save values of settings that are of interest to libpq in fields of the
1125  * PGconn object. We keep client_encoding and standard_conforming_strings
1126  * in static variables as well, so that PQescapeString and PQescapeBytea
1127  * can behave somewhat sanely (at least in single-connection-using
1128  * programs).
1129  */
1130  if (strcmp(name, "client_encoding") == 0)
1131  {
1133  /* if we don't recognize the encoding name, fall back to SQL_ASCII */
1134  if (conn->client_encoding < 0)
1137  }
1138  else if (strcmp(name, "standard_conforming_strings") == 0)
1139  {
1140  conn->std_strings = (strcmp(value, "on") == 0);
1142  }
1143  else if (strcmp(name, "server_version") == 0)
1144  {
1145  /* We convert the server version to numeric form. */
1146  int cnt;
1147  int vmaj,
1148  vmin,
1149  vrev;
1150 
1151  cnt = sscanf(value, "%d.%d.%d", &vmaj, &vmin, &vrev);
1152 
1153  if (cnt == 3)
1154  {
1155  /* old style, e.g. 9.6.1 */
1156  conn->sversion = (100 * vmaj + vmin) * 100 + vrev;
1157  }
1158  else if (cnt == 2)
1159  {
1160  if (vmaj >= 10)
1161  {
1162  /* new style, e.g. 10.1 */
1163  conn->sversion = 100 * 100 * vmaj + vmin;
1164  }
1165  else
1166  {
1167  /* old style without minor version, e.g. 9.6devel */
1168  conn->sversion = (100 * vmaj + vmin) * 100;
1169  }
1170  }
1171  else if (cnt == 1)
1172  {
1173  /* new style without minor version, e.g. 10devel */
1174  conn->sversion = 100 * 100 * vmaj;
1175  }
1176  else
1177  conn->sversion = 0; /* unknown */
1178  }
1179  else if (strcmp(name, "default_transaction_read_only") == 0)
1180  {
1182  (strcmp(value, "on") == 0) ? PG_BOOL_YES : PG_BOOL_NO;
1183  }
1184  else if (strcmp(name, "in_hot_standby") == 0)
1185  {
1186  conn->in_hot_standby =
1187  (strcmp(value, "on") == 0) ? PG_BOOL_YES : PG_BOOL_NO;
1188  }
1189  else if (strcmp(name, "scram_iterations") == 0)
1190  {
1192  }
1193 }
struct pgParameterStatus pgParameterStatus
@ PG_BOOL_YES
Definition: libpq-int.h:263
@ PG_BOOL_NO
Definition: libpq-int.h:264
#define pg_char_to_encoding
Definition: pg_wchar.h:629
struct pgParameterStatus * next
Definition: libpq-int.h:277
PGTernaryBool in_hot_standby
Definition: libpq-int.h:514
PGTernaryBool default_transaction_read_only
Definition: libpq-int.h:513
pgParameterStatus * pstatus
Definition: libpq-int.h:510
int scram_sha_256_iterations
Definition: libpq-int.h:559

References pg_conn::client_encoding, conn, pg_conn::default_transaction_read_only, free, pg_conn::in_hot_standby, malloc, name, pgParameterStatus::name, pgParameterStatus::next, PG_BOOL_NO, PG_BOOL_YES, pg_char_to_encoding, PG_SQL_ASCII, pg_conn::pstatus, pg_conn::scram_sha_256_iterations, static_client_encoding, static_std_strings, pg_conn::std_strings, pg_conn::sversion, value, and pgParameterStatus::value.

Referenced by getParameterStatus().

◆ pqSaveWriteError()

static void pqSaveWriteError ( PGconn conn)
static

Definition at line 820 of file fe-exec.c.

821 {
822  /*
823  * If write_err_msg is null because of previous strdup failure, do what we
824  * can. (It's likely our machinations here will get OOM failures as well,
825  * but might as well try.)
826  */
827  if (conn->write_err_msg)
828  {
830  /* Avoid possibly appending the same message twice */
831  conn->write_err_msg[0] = '\0';
832  }
833  else
834  libpq_append_conn_error(conn, "write to server failed");
835 
837 }
char * write_err_msg
Definition: libpq-int.h:485

References appendPQExpBufferStr(), conn, pg_conn::errorMessage, libpq_append_conn_error(), pqSaveErrorResult(), and pg_conn::write_err_msg.

Referenced by PQgetResult().

◆ PQsendClosePortal()

int PQsendClosePortal ( PGconn conn,
const char *  portal 
)

Definition at line 2569 of file fe-exec.c.

2570 {
2571  return PQsendTypedCommand(conn, PqMsg_Close, 'P', portal);
2572 }

References conn, PqMsg_Close, and PQsendTypedCommand().

Referenced by test_prepared().

◆ PQsendClosePrepared()

int PQsendClosePrepared ( PGconn conn,
const char *  stmt 
)

Definition at line 2556 of file fe-exec.c.

2557 {
2558  return PQsendTypedCommand(conn, PqMsg_Close, 'S', stmt);
2559 }

References conn, PqMsg_Close, PQsendTypedCommand(), and stmt.

Referenced by test_prepared().

◆ PQsendDescribePortal()

int PQsendDescribePortal ( PGconn conn,
const char *  portal 
)

Definition at line 2504 of file fe-exec.c.

2505 {
2506  return PQsendTypedCommand(conn, PqMsg_Describe, 'P', portal);
2507 }

References conn, PqMsg_Describe, and PQsendTypedCommand().

Referenced by test_prepared().

◆ PQsendDescribePrepared()

int PQsendDescribePrepared ( PGconn conn,
const char *  stmt 
)

Definition at line 2491 of file fe-exec.c.

2492 {
2493  return PQsendTypedCommand(conn, PqMsg_Describe, 'S', stmt);
2494 }

References conn, PqMsg_Describe, PQsendTypedCommand(), and stmt.

Referenced by test_prepared().

◆ PQsendFlushRequest()

int PQsendFlushRequest ( PGconn conn)

Definition at line 3371 of file fe-exec.c.

3372 {
3373  if (!conn)
3374  return 0;
3375 
3376  /* Don't try to send if we know there's no live connection. */
3377  if (conn->status != CONNECTION_OK)
3378  {
3379  libpq_append_conn_error(conn, "no connection to the server");
3380  return 0;
3381  }
3382 
3383  /* Can't send while already busy, either, unless enqueuing for later */
3384  if (conn->asyncStatus != PGASYNC_IDLE &&
3386  {
3387  libpq_append_conn_error(conn, "another command is already in progress");
3388  return 0;
3389  }
3390 
3391  if (pqPutMsgStart(PqMsg_Flush, conn) < 0 ||
3392  pqPutMsgEnd(conn) < 0)
3393  {
3394  return 0;
3395  }
3396 
3397  /*
3398  * Give the data a push (in pipeline mode, only if we're past the size
3399  * threshold). In nonblock mode, don't complain if we're unable to send
3400  * it all; PQgetResult() will do any additional flushing needed.
3401  */
3402  if (pqPipelineFlush(conn) < 0)
3403  return 0;
3404 
3405  return 1;
3406 }
#define PqMsg_Flush
Definition: protocol.h:24

References pg_conn::asyncStatus, conn, CONNECTION_OK, libpq_append_conn_error(), PGASYNC_IDLE, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, PqMsg_Flush, pqPipelineFlush(), pqPutMsgEnd(), pqPutMsgStart(), and pg_conn::status.

Referenced by test_nosync(), test_pipeline_idle(), test_singlerowmode(), and test_uniqviol().

◆ PQsendPipelineSync()

int PQsendPipelineSync ( PGconn conn)

Definition at line 3282 of file fe-exec.c.

3283 {
3284  return pqPipelineSyncInternal(conn, false);
3285 }

References conn, and pqPipelineSyncInternal().

Referenced by executeMetaCommand(), and test_multi_pipelines().

◆ PQsendPrepare()

int PQsendPrepare ( PGconn conn,
const char *  stmtName,
const char *  query,
int  nParams,
const Oid paramTypes 
)

Definition at line 1536 of file fe-exec.c.

1539 {
1540  PGcmdQueueEntry *entry = NULL;
1541 
1542  if (!PQsendQueryStart(conn, true))
1543  return 0;
1544 
1545  /* check the arguments */
1546  if (!stmtName)
1547  {
1548  libpq_append_conn_error(conn, "statement name is a null pointer");
1549  return 0;
1550  }
1551  if (!query)
1552  {
1553  libpq_append_conn_error(conn, "command string is a null pointer");
1554  return 0;
1555  }
1556  if (nParams < 0 || nParams > PQ_QUERY_PARAM_MAX_LIMIT)
1557  {
1558  libpq_append_conn_error(conn, "number of parameters must be between 0 and %d",
1560  return 0;
1561  }
1562 
1563  entry = pqAllocCmdQueueEntry(conn);
1564  if (entry == NULL)
1565  return 0; /* error msg already set */
1566 
1567  /* construct the Parse message */
1568  if (pqPutMsgStart(PqMsg_Parse, conn) < 0 ||
1569  pqPuts(stmtName, conn) < 0 ||
1570  pqPuts(query, conn) < 0)
1571  goto sendFailed;
1572 
1573  if (nParams > 0 && paramTypes)
1574  {
1575  int i;
1576 
1577  if (pqPutInt(nParams, 2, conn) < 0)
1578  goto sendFailed;
1579  for (i = 0; i < nParams; i++)
1580  {
1581  if (pqPutInt(paramTypes[i], 4, conn) < 0)
1582  goto sendFailed;
1583  }
1584  }
1585  else
1586  {
1587  if (pqPutInt(0, 2, conn) < 0)
1588  goto sendFailed;
1589  }
1590  if (pqPutMsgEnd(conn) < 0)
1591  goto sendFailed;
1592 
1593  /* Add a Sync, unless in pipeline mode. */
1595  {
1596  if (pqPutMsgStart(PqMsg_Sync, conn) < 0 ||
1597  pqPutMsgEnd(conn) < 0)
1598  goto sendFailed;
1599  }
1600 
1601  /* remember we are doing just a Parse */
1602  entry->queryclass = PGQUERY_PREPARE;
1603 
1604  /* and remember the query text too, if possible */
1605  /* if insufficient memory, query just winds up NULL */
1606  entry->query = strdup(query);
1607 
1608  /*
1609  * Give the data a push (in pipeline mode, only if we're past the size
1610  * threshold). In nonblock mode, don't complain if we're unable to send
1611  * it all; PQgetResult() will do any additional flushing needed.
1612  */
1613  if (pqPipelineFlush(conn) < 0)
1614  goto sendFailed;
1615 
1616  /* OK, it's launched! */
1617  pqAppendCmdQueueEntry(conn, entry);
1618 
1619  return 1;
1620 
1621 sendFailed:
1622  pqRecycleCmdQueueEntry(conn, entry);
1623  /* error message should be set up already */
1624  return 0;
1625 }
static bool PQsendQueryStart(PGconn *conn, bool newQuery)
Definition: fe-exec.c:1673
int pqPutInt(int value, size_t bytes, PGconn *conn)
Definition: fe-misc.c:253
#define PQ_QUERY_PARAM_MAX_LIMIT
Definition: libpq-fe.h:473
@ PGQUERY_PREPARE
Definition: libpq-int.h:328
#define PqMsg_Parse
Definition: protocol.h:25

References conn, i, libpq_append_conn_error(), PGQUERY_PREPARE, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, PQ_QUERY_PARAM_MAX_LIMIT, pqAllocCmdQueueEntry(), pqAppendCmdQueueEntry(), PqMsg_Parse, PqMsg_Sync, pqPipelineFlush(), pqPutInt(), pqPutMsgEnd(), pqPutMsgStart(), pqPuts(), pqRecycleCmdQueueEntry(), PQsendQueryStart(), PGcmdQueueEntry::query, and PGcmdQueueEntry::queryclass.

Referenced by PQprepare(), prepare_foreign_modify(), test_pipelined_insert(), test_prepared(), and test_transaction().

◆ PQsendQuery()

◆ PQsendQueryContinue()

int PQsendQueryContinue ( PGconn conn,
const char *  query 
)

Definition at line 1422 of file fe-exec.c.

1423 {
1424  return PQsendQueryInternal(conn, query, false);
1425 }

References conn, and PQsendQueryInternal().

Referenced by PQconnectPoll().

◆ PQsendQueryGuts()

static int PQsendQueryGuts ( PGconn conn,
const char *  command,
const char *  stmtName,
int  nParams,
const Oid paramTypes,
const char *const *  paramValues,
const int *  paramLengths,
const int *  paramFormats,
int  resultFormat 
)
static

Definition at line 1757 of file fe-exec.c.

1766 {
1767  int i;
1768  PGcmdQueueEntry *entry;
1769 
1770  entry = pqAllocCmdQueueEntry(conn);
1771  if (entry == NULL)
1772  return 0; /* error msg already set */
1773 
1774  /*
1775  * We will send Parse (if needed), Bind, Describe Portal, Execute, Sync
1776  * (if not in pipeline mode), using specified statement name and the
1777  * unnamed portal.
1778  */
1779 
1780  if (command)
1781  {
1782  /* construct the Parse message */
1783  if (pqPutMsgStart(PqMsg_Parse, conn) < 0 ||
1784  pqPuts(stmtName, conn) < 0 ||
1785  pqPuts(command, conn) < 0)
1786  goto sendFailed;
1787  if (nParams > 0 && paramTypes)
1788  {
1789  if (pqPutInt(nParams, 2, conn) < 0)
1790  goto sendFailed;
1791  for (i = 0; i < nParams; i++)
1792  {
1793  if (pqPutInt(paramTypes[i], 4, conn) < 0)
1794  goto sendFailed;
1795  }
1796  }
1797  else
1798  {
1799  if (pqPutInt(0, 2, conn) < 0)
1800  goto sendFailed;
1801  }
1802  if (pqPutMsgEnd(conn) < 0)
1803  goto sendFailed;
1804  }
1805 
1806  /* Construct the Bind message */
1807  if (pqPutMsgStart(PqMsg_Bind, conn) < 0 ||
1808  pqPuts("", conn) < 0 ||
1809  pqPuts(stmtName, conn) < 0)
1810  goto sendFailed;
1811 
1812  /* Send parameter formats */
1813  if (nParams > 0 && paramFormats)
1814  {
1815  if (pqPutInt(nParams, 2, conn) < 0)
1816  goto sendFailed;
1817  for (i = 0; i < nParams; i++)
1818  {
1819  if (pqPutInt(paramFormats[i], 2, conn) < 0)
1820  goto sendFailed;
1821  }
1822  }
1823  else
1824  {
1825  if (pqPutInt(0, 2, conn) < 0)
1826  goto sendFailed;
1827  }
1828 
1829  if (pqPutInt(nParams, 2, conn) < 0)
1830  goto sendFailed;
1831 
1832  /* Send parameters */
1833  for (i = 0; i < nParams; i++)
1834  {
1835  if (paramValues && paramValues[i])
1836  {
1837  int nbytes;
1838 
1839  if (paramFormats && paramFormats[i] != 0)
1840  {
1841  /* binary parameter */
1842  if (paramLengths)
1843  nbytes = paramLengths[i];
1844  else
1845  {
1846  libpq_append_conn_error(conn, "length must be given for binary parameter");
1847  goto sendFailed;
1848  }
1849  }
1850  else
1851  {
1852  /* text parameter, do not use paramLengths */
1853  nbytes = strlen(paramValues[i]);
1854  }
1855  if (pqPutInt(nbytes, 4, conn) < 0 ||
1856  pqPutnchar(paramValues[i], nbytes, conn) < 0)
1857  goto sendFailed;
1858  }
1859  else
1860  {
1861  /* take the param as NULL */
1862  if (pqPutInt(-1, 4, conn) < 0)
1863  goto sendFailed;
1864  }
1865  }
1866  if (pqPutInt(1, 2, conn) < 0 ||
1867  pqPutInt(resultFormat, 2, conn))
1868  goto sendFailed;
1869  if (pqPutMsgEnd(conn) < 0)
1870  goto sendFailed;
1871 
1872  /* construct the Describe Portal message */
1873  if (pqPutMsgStart(PqMsg_Describe, conn) < 0 ||
1874  pqPutc('P', conn) < 0 ||
1875  pqPuts("", conn) < 0 ||
1876  pqPutMsgEnd(conn) < 0)
1877  goto sendFailed;
1878 
1879  /* construct the Execute message */
1880  if (pqPutMsgStart(PqMsg_Execute, conn) < 0 ||
1881  pqPuts("", conn) < 0 ||
1882  pqPutInt(0, 4, conn) < 0 ||
1883  pqPutMsgEnd(conn) < 0)
1884  goto sendFailed;
1885 
1886  /* construct the Sync message if not in pipeline mode */
1888  {
1889  if (pqPutMsgStart(PqMsg_Sync, conn) < 0 ||
1890  pqPutMsgEnd(conn) < 0)
1891  goto sendFailed;
1892  }
1893 
1894  /* remember we are using extended query protocol */
1895  entry->queryclass = PGQUERY_EXTENDED;
1896 
1897  /* and remember the query text too, if possible */
1898  /* if insufficient memory, query just winds up NULL */
1899  if (command)
1900  entry->query = strdup(command);
1901 
1902  /*
1903  * Give the data a push (in pipeline mode, only if we're past the size
1904  * threshold). In nonblock mode, don't complain if we're unable to send
1905  * it all; PQgetResult() will do any additional flushing needed.
1906  */
1907  if (pqPipelineFlush(conn) < 0)
1908  goto sendFailed;
1909 
1910  /* OK, it's launched! */
1911  pqAppendCmdQueueEntry(conn, entry);
1912 
1913  return 1;
1914 
1915 sendFailed:
1916  pqRecycleCmdQueueEntry(conn, entry);
1917  /* error message should be set up already */
1918  return 0;
1919 }
int pqPutc(char c, PGconn *conn)
Definition: fe-misc.c:92
#define PqMsg_Bind
Definition: protocol.h:19
#define PqMsg_Execute
Definition: protocol.h:22

References conn, i, libpq_append_conn_error(), PGQUERY_EXTENDED, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, pqAllocCmdQueueEntry(), pqAppendCmdQueueEntry(), PqMsg_Bind, PqMsg_Describe, PqMsg_Execute, PqMsg_Parse, PqMsg_Sync, pqPipelineFlush(), pqPutc(), pqPutInt(), pqPutMsgEnd(), pqPutMsgStart(), pqPutnchar(), pqPuts(), pqRecycleCmdQueueEntry(), PGcmdQueueEntry::query, and PGcmdQueueEntry::queryclass.

Referenced by PQsendQueryParams(), and PQsendQueryPrepared().

◆ PQsendQueryInternal()

static int PQsendQueryInternal ( PGconn conn,
const char *  query,
bool  newQuery 
)
static

Definition at line 1428 of file fe-exec.c.

1429 {
1430  PGcmdQueueEntry *entry = NULL;
1431 
1432  if (!PQsendQueryStart(conn, newQuery))
1433  return 0;
1434 
1435  /* check the argument */
1436  if (!query)
1437  {
1438  libpq_append_conn_error(conn, "command string is a null pointer");
1439  return 0;
1440  }
1441 
1443  {
1444  libpq_append_conn_error(conn, "%s not allowed in pipeline mode",
1445  "PQsendQuery");
1446  return 0;
1447  }
1448 
1449  entry = pqAllocCmdQueueEntry(conn);
1450  if (entry == NULL)
1451  return 0; /* error msg already set */
1452 
1453  /* Send the query message(s) */
1454  /* construct the outgoing Query message */
1455  if (pqPutMsgStart(PqMsg_Query, conn) < 0 ||
1456  pqPuts(query, conn) < 0 ||
1457  pqPutMsgEnd(conn) < 0)
1458  {
1459  /* error message should be set up already */
1460  pqRecycleCmdQueueEntry(conn, entry);
1461  return 0;
1462  }
1463 
1464  /* remember we are using simple query protocol */
1465  entry->queryclass = PGQUERY_SIMPLE;
1466  /* and remember the query text too, if possible */
1467  entry->query = strdup(query);
1468 
1469  /*
1470  * Give the data a push. In nonblock mode, don't complain if we're unable
1471  * to send it all; PQgetResult() will do any additional flushing needed.
1472  */
1473  if (pqFlush(conn) < 0)
1474  goto sendFailed;
1475 
1476  /* OK, it's launched! */
1477  pqAppendCmdQueueEntry(conn, entry);
1478 
1479  return 1;
1480 
1481 sendFailed:
1482  pqRecycleCmdQueueEntry(conn, entry);
1483  /* error message should be set up already */
1484  return 0;
1485 }
#define PqMsg_Query
Definition: protocol.h:26

References conn, libpq_append_conn_error(), PGQUERY_SIMPLE, pg_conn::pipelineStatus, PQ_PIPELINE_OFF, pqAllocCmdQueueEntry(), pqAppendCmdQueueEntry(), pqFlush(), PqMsg_Query, pqPutMsgEnd(), pqPutMsgStart(), pqPuts(), pqRecycleCmdQueueEntry(), PQsendQueryStart(), PGcmdQueueEntry::query, and PGcmdQueueEntry::queryclass.

Referenced by PQsendQuery(), and PQsendQueryContinue().

◆ PQsendQueryParams()

int PQsendQueryParams ( PGconn conn,
const char *  command,
int  nParams,
const Oid paramTypes,
const char *const *  paramValues,
const int *  paramLengths,
const int *  paramFormats,
int  resultFormat 
)

Definition at line 1492 of file fe-exec.c.

1500 {
1501  if (!PQsendQueryStart(conn, true))
1502  return 0;
1503 
1504  /* check the arguments */
1505  if (!command)
1506  {
1507  libpq_append_conn_error(conn, "command string is a null pointer");
1508  return 0;
1509  }
1510  if (nParams < 0 || nParams > PQ_QUERY_PARAM_MAX_LIMIT)
1511  {
1512  libpq_append_conn_error(conn, "number of parameters must be between 0 and %d",
1514  return 0;
1515  }
1516 
1517  return PQsendQueryGuts(conn,
1518  command,
1519  "", /* use unnamed statement */
1520  nParams,
1521  paramTypes,
1522  paramValues,
1523  paramLengths,
1524  paramFormats,
1525  resultFormat);
1526 }
static int PQsendQueryGuts(PGconn *conn, const char *command, const char *stmtName, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
Definition: fe-exec.c:1757

References conn, libpq_append_conn_error(), PQ_QUERY_PARAM_MAX_LIMIT, PQsendQueryGuts(), and PQsendQueryStart().

Referenced by create_cursor(), ExecQueryAndProcessResults(), execute_dml_stmt(), libpqsrv_exec_params(), PQexecParams(), send_cancellable_query_impl(), sendCommand(), test_multi_pipelines(), test_nosync(), test_pipeline_abort(), test_pipeline_idle(), test_pipelined_insert(), test_simple_pipeline(), test_singlerowmode(), and test_transaction().

◆ PQsendQueryPrepared()

int PQsendQueryPrepared ( PGconn conn,
const char *  stmtName,
int  nParams,
const char *const *  paramValues,
const int *  paramLengths,
const int *  paramFormats,
int  resultFormat 
)

Definition at line 1633 of file fe-exec.c.

1640 {
1641  if (!PQsendQueryStart(conn, true))
1642  return 0;
1643 
1644  /* check the arguments */
1645  if (!stmtName)
1646  {
1647  libpq_append_conn_error(conn, "statement name is a null pointer");
1648  return 0;
1649  }
1650  if (nParams < 0 || nParams > PQ_QUERY_PARAM_MAX_LIMIT)
1651  {
1652  libpq_append_conn_error(conn, "number of parameters must be between 0 and %d",
1654  return 0;
1655  }
1656 
1657  return PQsendQueryGuts(conn,
1658  NULL, /* no command to parse */
1659  stmtName,
1660  nParams,
1661  NULL, /* no param types */
1662  paramValues,
1663  paramLengths,
1664  paramFormats,
1665  resultFormat);
1666 }

References conn, libpq_append_conn_error(), PQ_QUERY_PARAM_MAX_LIMIT, PQsendQueryGuts(), and PQsendQueryStart().

Referenced by execute_foreign_modify(), PQexecPrepared(), process_queued_fetch_requests(), sendCommand(), test_pipelined_insert(), test_transaction(), and test_uniqviol().

◆ PQsendQueryStart()

static bool PQsendQueryStart ( PGconn conn,
bool  newQuery 
)
static

Definition at line 1673 of file fe-exec.c.

1674 {
1675  if (!conn)
1676  return false;
1677 
1678  /*
1679  * If this is the beginning of a query cycle, reset the error state.
1680  * However, in pipeline mode with something already queued, the error
1681  * buffer belongs to that command and we shouldn't clear it.
1682  */
1683  if (newQuery && conn->cmd_queue_head == NULL)
1685 
1686  /* Don't try to send if we know there's no live connection. */
1687  if (conn->status != CONNECTION_OK)
1688  {
1689  libpq_append_conn_error(conn, "no connection to the server");
1690  return false;
1691  }
1692 
1693  /* Can't send while already busy, either, unless enqueuing for later */
1694  if (conn->asyncStatus != PGASYNC_IDLE &&
1696  {