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Remove heap_release_fetch, which is no longer used anywhere; this simplifies

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heap_fetch a little.
This commit is contained in:
Tom Lane
2008-04-03 17:12:27 +00:00
parent d3bf8c7097
commit b03271590e
2 changed files with 4 additions and 33 deletions
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32
src/backend/access/heap/heapam.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.254 2008/03/26 21:10:37 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.255 2008/04/03 17:12:27 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -1334,30 +1334,6 @@ heap_fetch(Relation relation,
Buffer *userbuf,
bool keep_buf,
Relation stats_relation)
{
/* Assume *userbuf is undefined on entry */
*userbuf = InvalidBuffer;
return heap_release_fetch(relation, snapshot, tuple,
userbuf, keep_buf, stats_relation);
}
/*
* heap_release_fetch - retrieve tuple with given tid
*
* This has the same API as heap_fetch except that if *userbuf is not
* InvalidBuffer on entry, that buffer will be released before reading
* the new page. This saves a separate ReleaseBuffer step and hence
* one entry into the bufmgr when looping through multiple fetches.
* Also, if *userbuf is the same buffer that holds the target tuple,
* we avoid bufmgr manipulation altogether.
*/
bool
heap_release_fetch(Relation relation,
Snapshot snapshot,
HeapTuple tuple,
Buffer *userbuf,
bool keep_buf,
Relation stats_relation)
{
ItemPointer tid = &(tuple->t_self);
ItemId lp;
@ -1367,11 +1343,9 @@ heap_release_fetch(Relation relation,
bool valid;
/*
* get the buffer from the relation descriptor. Note that this does a
* buffer pin, and releases the old *userbuf if not InvalidBuffer.
* Fetch and pin the appropriate page of the relation.
*/
buffer = ReleaseAndReadBuffer(*userbuf, relation,
ItemPointerGetBlockNumber(tid));
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
/*
* Need share lock on buffer to examine tuple commit status.