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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2006-02-28 04:10:28 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2006-02-28 04:10:28 +0000 |
| commit | 2c0ef9777cce8f97dd01073d962e6aa31722b5ad (patch) | |
| tree | bcfa428f69e6013002a79ab29e053bd6c6cbcfa7 /src/backend/executor/nodeBitmapHeapscan.c | |
| parent | 7f4f42fa100872507ca10d8e0f7d923acc266ee8 (diff) | |
| download | postgresql-2c0ef9777cce8f97dd01073d962e6aa31722b5ad.tar.gz postgresql-2c0ef9777cce8f97dd01073d962e6aa31722b5ad.zip | |
Extend the ExecInitNode API so that plan nodes receive a set of flag
bits indicating which optional capabilities can actually be exercised
at runtime. This will allow Sort and Material nodes, and perhaps later
other nodes, to avoid unnecessary overhead in common cases.
This commit just adds the infrastructure and arranges to pass the correct
flag values down to plan nodes; none of the actual optimizations are here
yet. I'm committing this separately in case anyone wants to measure the
added overhead. (It should be negligible.)
Simon Riggs and Tom Lane
Diffstat (limited to 'src/backend/executor/nodeBitmapHeapscan.c')
| -rw-r--r-- | src/backend/executor/nodeBitmapHeapscan.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c index 959b559d1b0..df276b87b1f 100644 --- a/src/backend/executor/nodeBitmapHeapscan.c +++ b/src/backend/executor/nodeBitmapHeapscan.c @@ -21,7 +21,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/nodeBitmapHeapscan.c,v 1.8 2005/12/02 20:03:40 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/nodeBitmapHeapscan.c,v 1.9 2006/02/28 04:10:27 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -459,11 +459,14 @@ ExecEndBitmapHeapScan(BitmapHeapScanState *node) * ---------------------------------------------------------------- */ BitmapHeapScanState * -ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate) +ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags) { BitmapHeapScanState *scanstate; Relation currentRelation; + /* check for unsupported flags */ + Assert(!(eflags & (EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK))); + /* * Assert caller didn't ask for an unsafe snapshot --- see comments * at head of file. @@ -552,7 +555,7 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate) * relation's indexes, and we want to be sure we have acquired a lock * on the relation first. */ - outerPlanState(scanstate) = ExecInitNode(outerPlan(node), estate); + outerPlanState(scanstate) = ExecInitNode(outerPlan(node), estate, eflags); /* * all done. |