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Use Snapshot in heap access methods.

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This commit is contained in:
Vadim B. Mikheev
1998-07-27 19:38:40 +00:00
parent f7f989c990
commit be8300b18f
54 changed files with 352 additions and 339 deletions
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12
src/backend/commands/user.c
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@ -20,11 +20,7 @@
#include <miscadmin.h>
#include <catalog/catname.h>
#ifdef MULTIBYTE
#include <catalog/pg_database_mb.h>
#else
#include <catalog/pg_database.h>
#endif
#include <catalog/pg_shadow.h>
#include <libpq/crypt.h>
#include <access/heapam.h>
@ -138,7 +134,7 @@ DefineUser(CreateUserStmt *stmt)
*/
RelationSetLockForWrite(pg_shadow_rel);
scan = heap_beginscan(pg_shadow_rel, false, false, 0, NULL);
scan = heap_beginscan(pg_shadow_rel, false, SnapshotNow, 0, NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0, &buffer)))
{
datum = heap_getattr(tuple, Anum_pg_shadow_usename, pg_shadow_dsc, &n);
@ -268,7 +264,7 @@ AlterUser(AlterUserStmt *stmt)
*/
RelationSetLockForWrite(pg_shadow_rel);
scan = heap_beginscan(pg_shadow_rel, false, false, 0, NULL);
scan = heap_beginscan(pg_shadow_rel, false, SnapshotNow, 0, NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0, &buffer)))
{
datum = heap_getattr(tuple, Anum_pg_shadow_usename, pg_shadow_dsc, &n);
@ -397,7 +393,7 @@ RemoveUser(char *user)
*/
RelationSetLockForWrite(pg_shadow_rel);
scan = heap_beginscan(pg_shadow_rel, false, false, 0, NULL);
scan = heap_beginscan(pg_shadow_rel, false, SnapshotNow, 0, NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0, &buffer)))
{
datum = heap_getattr(tuple, Anum_pg_shadow_usename, pg_dsc, &n);
@ -428,7 +424,7 @@ RemoveUser(char *user)
pg_rel = heap_openr(DatabaseRelationName);
pg_dsc = RelationGetTupleDescriptor(pg_rel);
scan = heap_beginscan(pg_rel, false, false, 0, NULL);
scan = heap_beginscan(pg_rel, false, SnapshotNow, 0, NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0, &buffer)))
{
datum = heap_getattr(tuple, Anum_pg_database_datdba, pg_dsc, &n);