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discard.c File Reference
#include "postgres.h"
#include "access/xact.h"
#include "catalog/namespace.h"
#include "commands/async.h"
#include "commands/discard.h"
#include "commands/prepare.h"
#include "commands/sequence.h"
#include "utils/guc.h"
#include "utils/portal.h"
Include dependency graph for discard.c:

Go to the source code of this file.

Functions

static void DiscardAll (bool isTopLevel)
 
void DiscardCommand (DiscardStmt *stmt, bool isTopLevel)
 

Function Documentation

◆ DiscardAll()

static void DiscardAll ( bool  isTopLevel)
static

Definition at line 57 of file discard.c.

58{
59 /*
60 * Disallow DISCARD ALL in a transaction block. This is arguably
61 * inconsistent (we don't make a similar check in the command sequence
62 * that DISCARD ALL is equivalent to), but the idea is to catch mistakes:
63 * DISCARD ALL inside a transaction block would leave the transaction
64 * still uncommitted.
65 */
66 PreventInTransactionBlock(isTopLevel, "DISCARD ALL");
67
68 /* Closing portals might run user-defined code, so do that first. */
70 SetPGVariable("session_authorization", NIL, false);
78}
void Async_UnlistenAll(void)
Definition: async.c:770
void DropAllPreparedStatements(void)
Definition: prepare.c:537
void ResetSequenceCaches(void)
Definition: sequence.c:1943
void ResetAllOptions(void)
Definition: guc.c:2003
void SetPGVariable(const char *name, List *args, bool is_local)
Definition: guc_funcs.c:315
void LockReleaseAll(LOCKMETHODID lockmethodid, bool allLocks)
Definition: lock.c:2216
#define USER_LOCKMETHOD
Definition: lock.h:126
void ResetTempTableNamespace(void)
Definition: namespace.c:4644
#define NIL
Definition: pg_list.h:68
void ResetPlanCache(void)
Definition: plancache.c:2185
void PortalHashTableDeleteAll(void)
Definition: portalmem.c:607
void PreventInTransactionBlock(bool isTopLevel, const char *stmtType)
Definition: xact.c:3640

References Async_UnlistenAll(), DropAllPreparedStatements(), LockReleaseAll(), NIL, PortalHashTableDeleteAll(), PreventInTransactionBlock(), ResetAllOptions(), ResetPlanCache(), ResetSequenceCaches(), ResetTempTableNamespace(), SetPGVariable(), and USER_LOCKMETHOD.

Referenced by DiscardCommand().

◆ DiscardCommand()

void DiscardCommand ( DiscardStmt stmt,
bool  isTopLevel 
)

Definition at line 31 of file discard.c.

32{
33 switch (stmt->target)
34 {
35 case DISCARD_ALL:
36 DiscardAll(isTopLevel);
37 break;
38
39 case DISCARD_PLANS:
41 break;
42
45 break;
46
47 case DISCARD_TEMP:
49 break;
50
51 default:
52 elog(ERROR, "unrecognized DISCARD target: %d", stmt->target);
53 }
54}
static void DiscardAll(bool isTopLevel)
Definition: discard.c:57
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:225
#define stmt
Definition: indent_codes.h:59
@ DISCARD_ALL
Definition: parsenodes.h:3954
@ DISCARD_PLANS
Definition: parsenodes.h:3955
@ DISCARD_SEQUENCES
Definition: parsenodes.h:3956
@ DISCARD_TEMP
Definition: parsenodes.h:3957

References DISCARD_ALL, DISCARD_PLANS, DISCARD_SEQUENCES, DISCARD_TEMP, DiscardAll(), elog, ERROR, ResetPlanCache(), ResetSequenceCaches(), ResetTempTableNamespace(), and stmt.

Referenced by standard_ProcessUtility().