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Nab some low-hanging fruit: replace the planner's base_rel_list and

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other_rel_list with a single array indexed by rangetable index.
This reduces find_base_rel from O(N) to O(1) without any real penalty.
While find_base_rel isn't one of the major bottlenecks in any profile
I've seen so far, it was starting to creep up on the radar screen
for complex queries --- so might as well fix it.
This commit is contained in:
Tom Lane
2005-06-06 04:13:36 +00:00
parent 9ab4d98168
commit 9a586fe0c5
5 changed files with 143 additions and 110 deletions
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5
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.253 2005/06/05 22:32:54 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.254 2005/06/06 04:13:35 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -1150,9 +1150,8 @@ _outPlannerInfo(StringInfo str, PlannerInfo *node)
{
WRITE_NODE_TYPE("PLANNERINFO");
/* NB: this isn't a complete set of fields */
WRITE_NODE_FIELD(parse);
WRITE_NODE_FIELD(base_rel_list);
WRITE_NODE_FIELD(other_rel_list);
WRITE_NODE_FIELD(join_rel_list);
WRITE_NODE_FIELD(equi_key_list);
WRITE_NODE_FIELD(in_info_list);