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Teach planner and executor to handle ScalarArrayOpExpr as an indexable

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qualification when the underlying operator is indexable and useOr is true.
That is, indexkey op ANY (ARRAY[...]) is effectively translated into an
OR combination of one indexscan for each array element.  This only works
for bitmap index scans, of course, since regular indexscans no longer
support OR'ing of scans.  There are still some loose ends to clean up
before changing 'x IN (list)' to translate as a ScalarArrayOpExpr;
for instance predtest.c ought to be taught about it.  But this gets the
basic functionality in place.
This commit is contained in:
Tom Lane
2005-11-25 19:47:50 +00:00
parent dab52ab13d
commit 290166f934
12 changed files with 958 additions and 334 deletions
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16
src/include/executor/nodeIndexscan.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/executor/nodeIndexscan.h,v 1.24 2005/10/15 02:49:44 momjian Exp $
* $PostgreSQL: pgsql/src/include/executor/nodeIndexscan.h,v 1.25 2005/11/25 19:47:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -25,13 +25,15 @@ extern void ExecIndexRestrPos(IndexScanState *node);
extern void ExecIndexReScan(IndexScanState *node, ExprContext *exprCtxt);
/* routines exported to share code with nodeBitmapIndexscan.c */
extern bool ExecIndexBuildScanKeys(PlanState *planstate, List *quals,
extern void ExecIndexBuildScanKeys(PlanState *planstate, List *quals,
List *strategies, List *subtypes,
ExprState ***runtimeKeyInfo,
ScanKey *scanKeys, int *numScanKeys);
ScanKey *scanKeys, int *numScanKeys,
IndexRuntimeKeyInfo **runtimeKeys, int *numRuntimeKeys,
IndexArrayKeyInfo **arrayKeys, int *numArrayKeys);
extern void ExecIndexEvalRuntimeKeys(ExprContext *econtext,
ExprState **run_keys,
ScanKey scan_keys,
int n_keys);
IndexRuntimeKeyInfo *runtimeKeys, int numRuntimeKeys);
extern bool ExecIndexEvalArrayKeys(ExprContext *econtext,
IndexArrayKeyInfo *arrayKeys, int numArrayKeys);
extern bool ExecIndexAdvanceArrayKeys(IndexArrayKeyInfo *arrayKeys, int numArrayKeys);
#endif /* NODEINDEXSCAN_H */