Improve comments.

This commit is contained in:
Tom Lane 2000-10-19 23:06:24 +00:00
parent be7c0a926b
commit 8b53eaf90c
1 changed files with 15 additions and 2 deletions

View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/temprel.c,v 1.28 2000/10/11 21:28:19 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/temprel.c,v 1.29 2000/10/19 23:06:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -91,24 +91,37 @@ create_temp_relation(const char *relname, HeapTuple pg_class_tuple)
void
remove_all_temp_relations(void)
{
/* skip xact start overhead if nothing to do */
if (temp_rels == NIL)
return;
AbortOutOfAnyTransaction();
StartTransactionCommand();
/*
* The way this works is that each time through the loop, we delete
* the frontmost entry. The DROP will call remove_temp_rel_by_relid()
* as a side effect, thereby removing the entry in the temp_rels list.
* So this is not an infinite loop, even though it looks like one.
*/
while (temp_rels != NIL)
{
char relname[NAMEDATALEN];
TempTable *temp_rel = (TempTable *) lfirst(temp_rels);
if (temp_rel->relkind != RELKIND_INDEX)
{
char relname[NAMEDATALEN];
/* safe from deallocation */
strcpy(relname, temp_rel->user_relname);
heap_drop_with_catalog(relname, allowSystemTableMods);
}
else
index_drop(temp_rel->relid);
/* advance cmd counter to make catalog changes visible */
CommandCounterIncrement();
}
CommitTransactionCommand();
}