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Replace functional-index facility with expressional indexes. Any column

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of an index can now be a computed expression instead of a simple variable.
Restrictions on expressions are the same as for predicates (only immutable
functions, no sub-selects).  This fixes problems recently introduced with
inlining SQL functions, because the inlining transformation is applied to
both expression trees so the planner can still match them up.  Along the
way, improve efficiency of handling index predicates (both predicates and
index expressions are now cached by the relcache) and fix 7.3 oversight
that didn't record dependencies of predicate expressions.
This commit is contained in:
Tom Lane
2003-05-28 16:04:02 +00:00
parent e5f19598e0
commit fc8d970cbc
50 changed files with 1351 additions and 1283 deletions
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13
src/backend/executor/execUtils.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.99 2003/05/05 17:57:47 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.100 2003/05/28 16:03:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -706,10 +706,8 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo)
if (!indexDesc->rd_am->amconcurrent)
LockRelation(indexDesc, AccessExclusiveLock);
/*
* extract index key information from the index's pg_index tuple
*/
ii = BuildIndexInfo(indexDesc->rd_index);
/* extract index key information from the index's pg_index info */
ii = BuildIndexInfo(indexDesc);
relationDescs[i] = indexDesc;
indexInfoArray[i] = ii;
@ -797,7 +795,7 @@ ExecInsertIndexTuples(TupleTableSlot *slot,
/*
* We will use the EState's per-tuple context for evaluating
* predicates and functional-index functions (creating it if it's not
* predicates and index expressions (creating it if it's not
* already there).
*/
econtext = GetPerTupleExprContext(estate);
@ -844,11 +842,12 @@ ExecInsertIndexTuples(TupleTableSlot *slot,
/*
* FormIndexDatum fills in its datum and null parameters with
* attribute information taken from the given heap tuple.
* It also computes any expressions needed.
*/
FormIndexDatum(indexInfo,
heapTuple,
heapDescriptor,
econtext->ecxt_per_tuple_memory,
estate,
datum,
nullv);