database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-02 09:02:37 +03:00
Code Activity

heap_fetch requires buffer pointer, must be released; heap_getnext

Browse Source 
no longer returns buffer pointer, can be gotten from scan;
	descriptor; bootstrap can create multi-key indexes;
pg_procname index now is multi-key index; oidint2, oidint4, oidname
are gone (must be removed from regression tests); use System Cache
rather than sequential scan in many places; heap_modifytuple no
longer takes buffer parameter; remove unused buffer parameter in
a few other functions; oid8 is not index-able; remove some use of
single-character variable names; cleanup Buffer variables usage
and scan descriptor looping; cleaned up allocation and freeing of
tuples; 18k lines of diff;
This commit is contained in:
Bruce Momjian
1998-08-19 02:04:17 +00:00
parent 31de2c9461
commit 7971539020
123 changed files with 2139 additions and 3134 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/backend/executor/nodeSeqscan.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.11 1998/07/27 19:37:57 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeSeqscan.c,v 1.12 1998/08/19 02:02:05 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -55,7 +55,6 @@ SeqNext(SeqScan *node)
EState *estate;
ScanDirection direction;
TupleTableSlot *slot;
Buffer buffer;
/* ----------------
* get information from the estate and scan state
@ -70,9 +69,7 @@ SeqNext(SeqScan *node)
* get the next tuple from the access methods
* ----------------
*/
tuple = heap_getnext(scandesc, /* scan desc */
ScanDirectionIsBackward(direction), /* backward flag */
&buffer); /* return: buffer */
tuple = heap_getnext(scandesc, ScanDirectionIsBackward(direction));
/* ----------------
* save the tuple and the buffer returned to us by the access methods
@ -86,8 +83,7 @@ SeqNext(SeqScan *node)
slot = ExecStoreTuple(tuple,/* tuple to store */
slot, /* slot to store in */
buffer, /* buffer associated with this
* tuple */
scandesc->rs_cbuf,/* buffer associated with this tuple */
false); /* don't pfree this pointer */
/* ----------------
@ -364,8 +360,8 @@ ExecSeqReScan(SeqScan *node, ExprContext *exprCtxt, Plan *parent)
CommonScanState *scanstate;
EState *estate;
Plan *outerPlan;
Relation rdesc;
HeapScanDesc sdesc;
Relation rel;
HeapScanDesc scan;
ScanDirection direction;
scanstate = node->scanstate;
@ -380,11 +376,11 @@ ExecSeqReScan(SeqScan *node, ExprContext *exprCtxt, Plan *parent)
else
{
/* otherwise, we are scanning a relation */
rdesc = scanstate->css_currentRelation;
sdesc = scanstate->css_currentScanDesc;
rel = scanstate->css_currentRelation;
scan = scanstate->css_currentScanDesc;
direction = estate->es_direction;
sdesc = ExecReScanR(rdesc, sdesc, direction, 0, NULL);
scanstate->css_currentScanDesc = sdesc;
scan = ExecReScanR(rel, scan, direction, 0, NULL);
scanstate->css_currentScanDesc = scan;
}
}
@ -399,7 +395,7 @@ ExecSeqMarkPos(SeqScan *node)
{
CommonScanState *scanstate;
Plan *outerPlan;
HeapScanDesc sdesc;
HeapScanDesc scan;
scanstate = node->scanstate;
@ -421,8 +417,8 @@ ExecSeqMarkPos(SeqScan *node)
*
* ----------------
*/
sdesc = scanstate->css_currentScanDesc;
heap_markpos(sdesc);
scan = scanstate->css_currentScanDesc;
heap_markpos(scan);
return;
}
@ -438,7 +434,7 @@ ExecSeqRestrPos(SeqScan *node)
{
CommonScanState *scanstate;
Plan *outerPlan;
HeapScanDesc sdesc;
HeapScanDesc scan;
scanstate = node->scanstate;
@ -459,6 +455,6 @@ ExecSeqRestrPos(SeqScan *node)
* position using the access methods..
* ----------------
*/
sdesc = scanstate->css_currentScanDesc;
heap_restrpos(sdesc);
scan = scanstate->css_currentScanDesc;
heap_restrpos(scan);
}