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Revert based on Tom's recommendation:

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> Allow VACUUM to complete faster by avoiding scanning the indexes when no
> rows were removed from the heap by the VACUUM.
This commit is contained in:
Bruce Momjian
2006-02-11 17:14:09 +00:00
parent bf324946b3
commit 77bb65d3fc
7 changed files with 29 additions and 65 deletions
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21
src/backend/access/nbtree/nbtree.c
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@ -12,7 +12,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.137 2006/02/11 16:59:09 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.138 2006/02/11 17:14:08 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -543,9 +543,8 @@ btbulkdelete(PG_FUNCTION_ARGS)
double num_index_tuples;
OffsetNumber deletable[MaxOffsetNumber];
int ndeletable;
Buffer buf = NULL;
Buffer buf;
BlockNumber num_pages;
bool scanindex = true;
tuples_removed = 0;
num_index_tuples = 0;
@ -566,15 +565,8 @@ btbulkdelete(PG_FUNCTION_ARGS)
* skip obtaining exclusive lock on empty pages though, since no indexscan
* could be stopped on those.
*/
if (callback_state)
{
buf = _bt_get_endpoint(rel, 0, false);
scanindex = BufferIsValid(buf); /* check for empty index */
}
else
scanindex = false;
if (scanindex)
buf = _bt_get_endpoint(rel, 0, false);
if (BufferIsValid(buf)) /* check for empty index */
{
for (;;)
{
@ -657,10 +649,7 @@ btbulkdelete(PG_FUNCTION_ARGS)
result = (IndexBulkDeleteResult *) palloc0(sizeof(IndexBulkDeleteResult));
result->num_pages = num_pages;
if (scanindex)
result->num_index_tuples = num_index_tuples;
else
result->num_index_tuples = -1;
result->num_index_tuples = num_index_tuples;
result->tuples_removed = tuples_removed;
PG_RETURN_POINTER(result);