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Arrange to cache FdwRoutine structs in foreign tables' relcache entries.

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This saves several catalog lookups per reference.  It's not all that
exciting right now, because we'd managed to minimize the number of places
that need to fetch the data; but the upcoming writable-foreign-tables patch
needs this info in a lot more places.
This commit is contained in:
Tom Lane
2013-03-06 23:47:38 -05:00
parent 9795113916
commit 1908abc4a3
8 changed files with 72 additions and 6 deletions
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5
src/backend/utils/cache/relcache.c vendored
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@ -1846,6 +1846,8 @@ RelationDestroyRelation(Relation relation)
MemoryContextDelete(relation->rd_indexcxt);
if (relation->rd_rulescxt)
MemoryContextDelete(relation->rd_rulescxt);
if (relation->rd_fdwroutine)
pfree(relation->rd_fdwroutine);
pfree(relation);
}
@ -4410,7 +4412,7 @@ load_relcache_init_file(bool shared)
* format is complex and subject to change). They must be rebuilt if
* needed by RelationCacheInitializePhase3. This is not expected to
* be a big performance hit since few system catalogs have such. Ditto
* for index expressions, predicates, and exclusion info.
* for index expressions, predicates, exclusion info, and FDW info.
*/
rel->rd_rules = NULL;
rel->rd_rulescxt = NULL;
@ -4420,6 +4422,7 @@ load_relcache_init_file(bool shared)
rel->rd_exclops = NULL;
rel->rd_exclprocs = NULL;
rel->rd_exclstrats = NULL;
rel->rd_fdwroutine = NULL;
/*
* Reset transient-state fields in the relcache entry