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Restructure indexscan API (index_beginscan, index_getnext) per

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yesterday's proposal to pghackers.  Also remove unnecessary parameters
to heap_beginscan, heap_rescan.  I modified pg_proc.h to reflect the
new numbers of parameters for the AM interface routines, but did not
force an initdb because nothing actually looks at those fields.
This commit is contained in:
Tom Lane
2002-05-20 23:51:44 +00:00
parent c961474c96
commit 44fbe20d62
59 changed files with 834 additions and 1283 deletions
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10
src/backend/executor/nodeSeqscan.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.34 2002/02/19 20:11:14 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.35 2002/05/20 23:51:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -93,7 +93,7 @@ SeqNext(SeqScan *node)
/*
* get the next tuple from the access methods
*/
tuple = heap_getnext(scandesc, ScanDirectionIsBackward(direction));
tuple = heap_getnext(scandesc, direction);
/*
* save the tuple and the buffer returned to us by the access methods
@ -148,7 +148,6 @@ InitScanRelation(SeqScan *node, EState *estate,
List *rangeTable;
RangeTblEntry *rtentry;
Oid reloid;
ScanDirection direction;
Relation currentRelation;
HeapScanDesc currentScanDesc;
@ -162,12 +161,10 @@ InitScanRelation(SeqScan *node, EState *estate,
rangeTable = estate->es_range_table;
rtentry = rt_fetch(relid, rangeTable);
reloid = rtentry->relid;
direction = estate->es_direction;
currentRelation = heap_open(reloid, AccessShareLock);
currentScanDesc = heap_beginscan(currentRelation,
ScanDirectionIsBackward(direction),
estate->es_snapshot,
0,
NULL);
@ -316,7 +313,6 @@ ExecSeqReScan(SeqScan *node, ExprContext *exprCtxt, Plan *parent)
CommonScanState *scanstate;
EState *estate;
HeapScanDesc scan;
ScanDirection direction;
scanstate = node->scanstate;
estate = node->plan.state;
@ -330,10 +326,8 @@ ExecSeqReScan(SeqScan *node, ExprContext *exprCtxt, Plan *parent)
}
scan = scanstate->css_currentScanDesc;
direction = estate->es_direction;
heap_rescan(scan, /* scan desc */
ScanDirectionIsBackward(direction), /* backward flag */
NULL); /* new scan keys */
}