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Rework join-removal logic as per recent discussion. In particular this

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fixes things so that it works for cases where nested removals are possible.
The overhead of the optimization should be significantly less, as well.
This commit is contained in:
Tom Lane
2010-03-28 22:59:34 +00:00
parent a760893dbd
commit b78f6264eb
17 changed files with 585 additions and 317 deletions
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15
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.383 2010/02/16 22:34:43 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.384 2010/03/28 22:59:32 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -1478,16 +1478,6 @@ _outUniquePath(StringInfo str, UniquePath *node)
WRITE_FLOAT_FIELD(rows, "%.0f");
}
static void
_outNoOpPath(StringInfo str, NoOpPath *node)
{
WRITE_NODE_TYPE("NOOPPATH");
_outPathInfo(str, (Path *) node);
WRITE_NODE_FIELD(subpath);
}
static void
_outNestPath(StringInfo str, NestPath *node)
{
@ -2740,9 +2730,6 @@ _outNode(StringInfo str, void *obj)
case T_UniquePath:
_outUniquePath(str, obj);
break;
case T_NoOpPath:
_outNoOpPath(str, obj);
break;
case T_NestPath:
_outNestPath(str, obj);
break;