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Make DROP TABLE rollback-able: postpone physical file delete until commit.

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(WAL logging for this is not done yet, however.)  Clean up a number of really
crufty things that are no longer needed now that DROP behaves nicely.  Make
temp table mapper do the right things when drop or rename affecting a temp
table is rolled back.  Also, remove "relation modified while in use" error
check, in favor of locking tables at first reference and holding that lock
throughout the statement.
This commit is contained in:
Tom Lane
2000-11-08 22:10:03 +00:00
parent ebe0b23690
commit 3908473c80
46 changed files with 1305 additions and 1187 deletions
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22
src/backend/commands/indexcmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.39 2000/10/22 23:32:39 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.40 2000/11/08 22:09:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -214,7 +214,7 @@ DefineIndex(char *heapRelationName,
* backends to flush their relcache entries and in particular their
* cached lists of the indexes for this relation.
*/
setRelhasindexInplace(relationId, true, false);
setRelhasindex(relationId, true);
}
@ -635,6 +635,15 @@ ReindexIndex(const char *name, bool force /* currently unused */ )
{
HeapTuple tuple;
/* ----------------
* REINDEX within a transaction block is dangerous, because
* if the transaction is later rolled back we have no way to
* undo truncation of the index's physical file. Disallow it.
* ----------------
*/
if (IsTransactionBlock())
elog(ERROR, "REINDEX cannot run inside a BEGIN/END block");
tuple = SearchSysCacheTuple(RELNAME,
PointerGetDatum(name),
0, 0, 0);
@ -666,6 +675,15 @@ ReindexTable(const char *name, bool force)
{
HeapTuple tuple;
/* ----------------
* REINDEX within a transaction block is dangerous, because
* if the transaction is later rolled back we have no way to
* undo truncation of the index's physical file. Disallow it.
* ----------------
*/
if (IsTransactionBlock())
elog(ERROR, "REINDEX cannot run inside a BEGIN/END block");
tuple = SearchSysCacheTuple(RELNAME,
PointerGetDatum(name),
0, 0, 0);