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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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7
src/backend/nodes/copyfuncs.c
View File

@@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.272 2004/01/04 03:51:52 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.273 2004/01/05 05:07:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1168,8 +1168,9 @@ _copyRestrictInfo(RestrictInfo *from)
RestrictInfo *newnode = makeNode(RestrictInfo);
COPY_NODE_FIELD(clause);
COPY_SCALAR_FIELD(ispusheddown);
COPY_SCALAR_FIELD(canjoin);
COPY_SCALAR_FIELD(is_pushed_down);
COPY_SCALAR_FIELD(valid_everywhere);
COPY_SCALAR_FIELD(can_join);
COPY_BITMAPSET_FIELD(clause_relids);
COPY_BITMAPSET_FIELD(left_relids);
COPY_BITMAPSET_FIELD(right_relids);

5
src/backend/nodes/equalfuncs.c
View File

@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.211 2003/12/30 23:53:14 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.212 2004/01/05 05:07:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -560,7 +560,8 @@ static bool
_equalRestrictInfo(RestrictInfo *a, RestrictInfo *b)
{
COMPARE_NODE_FIELD(clause);
COMPARE_SCALAR_FIELD(ispusheddown);
COMPARE_SCALAR_FIELD(is_pushed_down);
COMPARE_SCALAR_FIELD(valid_everywhere);
/*
* We ignore all the remaining fields, since they may not be set yet,

9
src/backend/nodes/outfuncs.c
View File

@@ -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);