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Merge restrictlist_selectivity into clauselist_selectivity by

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teaching the latter to accept either RestrictInfo nodes or bare
clause expressions; and cache the selectivity result in the RestrictInfo
node when possible.  This extends the caching behavior of approx_selectivity
to many more contexts, and should reduce duplicate selectivity
calculations.
This commit is contained in:
Tom Lane
2004-01-04 03:51:52 +00:00
parent 21a1202281
commit 82b4dd394f
12 changed files with 196 additions and 200 deletions
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3
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.224 2004/01/04 00:07:32 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.225 2004/01/04 03:51:52 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -1075,6 +1075,7 @@ _outRestrictInfo(StringInfo str, RestrictInfo *node)
WRITE_NODE_FIELD(clause);
WRITE_BOOL_FIELD(ispusheddown);
WRITE_BOOL_FIELD(canjoin);
WRITE_BITMAPSET_FIELD(clause_relids);
WRITE_BITMAPSET_FIELD(left_relids);
WRITE_BITMAPSET_FIELD(right_relids);
WRITE_NODE_FIELD(orclause);