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Another round of planner/optimizer work. This is just restructuring and

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code cleanup; no major improvements yet.  However, EXPLAIN does produce
more intuitive outputs for nested loops with indexscans now...
This commit is contained in:
Tom Lane
2000-01-09 00:26:47 +00:00
parent 69d4299e3e
commit 166b5c1def
35 changed files with 1239 additions and 1448 deletions
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19
src/backend/nodes/equalfuncs.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.54 1999/12/24 06:43:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.55 2000/01/09 00:26:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -302,6 +302,17 @@ _equalRelOptInfo(RelOptInfo *a, RelOptInfo *b)
return equali(a->relids, b->relids);
}
static bool
_equalIndexOptInfo(IndexOptInfo *a, IndexOptInfo *b)
{
/* We treat IndexOptInfos as equal if they refer to the same index.
* Is this sufficient?
*/
if (a->indexoid != b->indexoid)
return false;
return true;
}
static bool
_equalPathKeyItem(PathKeyItem *a, PathKeyItem *b)
{
@@ -358,8 +369,6 @@ _equalJoinPath(JoinPath *a, JoinPath *b)
{
if (!_equalPath((Path *) a, (Path *) b))
return false;
if (!equal(a->pathinfo, b->pathinfo))
return false;
if (!equal(a->outerjoinpath, b->outerjoinpath))
return false;
if (!equal(a->innerjoinpath, b->innerjoinpath))
@@ -469,7 +478,6 @@ _equalRestrictInfo(RestrictInfo *a, RestrictInfo *b)
{
if (!equal(a->clause, b->clause))
return false;
/* do not check selectivity because of roundoff error worries */
if (!equal(a->subclauseindices, b->subclauseindices))
return false;
if (a->mergejoinoperator != b->mergejoinoperator)
@@ -792,6 +800,9 @@ equal(void *a, void *b)
case T_RelOptInfo:
retval = _equalRelOptInfo(a, b);
break;
case T_IndexOptInfo:
retval = _equalIndexOptInfo(a, b);
break;
case T_PathKeyItem:
retval = _equalPathKeyItem(a, b);
break;