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Fix all the places that called heap_update() and heap_delete() without

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bothering to check the return value --- which meant that in case the
update or delete failed because of a concurrent update, you'd not find
out about it, except by observing later that the transaction produced
the wrong outcome.  There are now subroutines simple_heap_update and
simple_heap_delete that should be used anyplace that you're not prepared
to do the full nine yards of coping with concurrent updates.  In
practice, that seems to mean absolutely everywhere but the executor,
because *noplace* else was checking.
This commit is contained in:
Tom Lane
2001-01-23 04:32:23 +00:00
parent 7a2a1acd52
commit 786f1a59cd
24 changed files with 192 additions and 107 deletions
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15
src/backend/commands/user.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/commands/user.c,v 1.71 2001/01/17 17:26:44 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/user.c,v 1.72 2001/01/23 04:32:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -458,10 +458,7 @@ AlterUser(AlterUserStmt *stmt)
}
new_tuple = heap_formtuple(pg_shadow_dsc, new_record, new_record_nulls);
Assert(new_tuple);
/* XXX check return value of this? */
heap_update(pg_shadow_rel, &tuple->t_self, new_tuple, NULL);
simple_heap_update(pg_shadow_rel, &tuple->t_self, new_tuple);
/* Update indexes */
if (RelationGetForm(pg_shadow_rel)->relhasindex)
@ -581,7 +578,7 @@ DropUser(DropUserStmt *stmt)
/*
* Remove the user from the pg_shadow table
*/
heap_delete(pg_shadow_rel, &tuple->t_self, NULL);
simple_heap_delete(pg_shadow_rel, &tuple->t_self);
ReleaseSysCache(tuple);
@ -929,7 +926,7 @@ AlterGroup(AlterGroupStmt *stmt, const char *tag)
new_record[Anum_pg_group_grolist - 1] = PointerGetDatum(newarray);
tuple = heap_formtuple(pg_group_dsc, new_record, new_record_nulls);
heap_update(pg_group_rel, &group_tuple->t_self, tuple, NULL);
simple_heap_update(pg_group_rel, &group_tuple->t_self, tuple);
/* Update indexes */
if (RelationGetForm(pg_group_rel)->relhasindex)
@ -1035,7 +1032,7 @@ AlterGroup(AlterGroupStmt *stmt, const char *tag)
new_record[Anum_pg_group_grolist - 1] = PointerGetDatum(newarray);
tuple = heap_formtuple(pg_group_dsc, new_record, new_record_nulls);
heap_update(pg_group_rel, &group_tuple->t_self, tuple, NULL);
simple_heap_update(pg_group_rel, &group_tuple->t_self, tuple);
/* Update indexes */
if (RelationGetForm(pg_group_rel)->relhasindex)
@ -1093,7 +1090,7 @@ DropGroup(DropGroupStmt *stmt)
if (datum && !null && strcmp((char *) datum, stmt->name) == 0)
{
gro_exists = true;
heap_delete(pg_group_rel, &tuple->t_self, NULL);
simple_heap_delete(pg_group_rel, &tuple->t_self);
}
}