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Add the ability to extract OR indexscan conditions from OR-of-AND

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join conditions in which each OR subclause includes a constraint on
the same relation.  This implements the other useful side-effect of
conversion to CNF format, without its unpleasant side-effects.  As
per pghackers discussion of a few weeks ago.
This commit is contained in:
Tom Lane
2004-01-05 05:07:36 +00:00
parent bf488a6842
commit 9091e8d1b2
16 changed files with 438 additions and 295 deletions
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9
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.225 2004/01/04 03:51:52 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.226 2004/01/05 05:07:35 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -971,7 +971,7 @@ _outIndexPath(StringInfo str, IndexPath *node)
WRITE_NODE_FIELD(indexqual);
WRITE_NODE_FIELD(indexjoinclauses);
WRITE_ENUM_FIELD(indexscandir, ScanDirection);
WRITE_FLOAT_FIELD(rows, "%.2f");
WRITE_FLOAT_FIELD(rows, "%.0f");
}
static void
@ -1073,8 +1073,9 @@ _outRestrictInfo(StringInfo str, RestrictInfo *node)
/* NB: this isn't a complete set of fields */
WRITE_NODE_FIELD(clause);
WRITE_BOOL_FIELD(ispusheddown);
WRITE_BOOL_FIELD(canjoin);
WRITE_BOOL_FIELD(is_pushed_down);
WRITE_BOOL_FIELD(valid_everywhere);
WRITE_BOOL_FIELD(can_join);
WRITE_BITMAPSET_FIELD(clause_relids);
WRITE_BITMAPSET_FIELD(left_relids);
WRITE_BITMAPSET_FIELD(right_relids);