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Allow extracting and parsing of reloptions from a bare pg_class tuple, and

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refactor the relcache code that used to do that.  This allows other callers
(particularly autovacuum) to do the same without necessarily having to open
and lock a table.
This commit is contained in:
Alvaro Herrera
2009-01-26 19:41:06 +00:00
parent 39ab3c1c61
commit c0f92b57dc
3 changed files with 57 additions and 30 deletions
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33
src/backend/utils/cache/relcache.c vendored
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.282 2009/01/22 20:16:06 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.283 2009/01/26 19:41:06 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -351,8 +351,6 @@ AllocateRelationDesc(Relation relation, Form_pg_class relp)
static void
RelationParseRelOptions(Relation relation, HeapTuple tuple)
{
Datum datum;
bool isnull;
bytea *options;
relation->rd_options = NULL;
@ -374,31 +372,10 @@ RelationParseRelOptions(Relation relation, HeapTuple tuple)
* we might not have any other for pg_class yet (consider executing this
* code for pg_class itself)
*/
datum = fastgetattr(tuple,
Anum_pg_class_reloptions,
GetPgClassDescriptor(),
&isnull);
if (isnull)
return;
/* Parse into appropriate format; don't error out here */
switch (relation->rd_rel->relkind)
{
case RELKIND_RELATION:
case RELKIND_TOASTVALUE:
case RELKIND_UNCATALOGED:
options = heap_reloptions(relation->rd_rel->relkind, datum,
false);
break;
case RELKIND_INDEX:
options = index_reloptions(relation->rd_am->amoptions, datum,
false);
break;
default:
Assert(false); /* can't get here */
options = NULL; /* keep compiler quiet */
break;
}
options = extractRelOptions(tuple,
GetPgClassDescriptor(),
relation->rd_rel->relkind == RELKIND_INDEX ?
relation->rd_am->amoptions : InvalidOid);
/* Copy parsed data into CacheMemoryContext */
if (options)