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Revise sinval code to remove no-longer-used tuple TID from inval messages.

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This requires adjusting the API for syscache callback functions: they now
get a hash value, not a TID, to identify the target tuple.  Most of them
weren't paying any attention to that argument anyway, but plancache did
require a small amount of fixing.

Also, improve performance a trifle by avoiding sending duplicate inval
messages when a heap_update isn't changing the catcache lookup columns.
This commit is contained in:
Tom Lane
2011-08-16 19:27:46 -04:00
parent 632ae6829f
commit b5282aa893
19 changed files with 210 additions and 211 deletions
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6
src/backend/utils/misc/superuser.c
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@@ -36,7 +36,7 @@ static Oid last_roleid = InvalidOid; /* InvalidOid == cache not valid */
static bool last_roleid_is_super = false;
static bool roleid_callback_registered = false;
static void RoleidCallback(Datum arg, int cacheid, ItemPointer tuplePtr);
static void RoleidCallback(Datum arg, int cacheid, uint32 hashvalue);
/*
@@ -96,11 +96,11 @@ superuser_arg(Oid roleid)
}
/*
* UseridCallback
* RoleidCallback
* Syscache inval callback function
*/
static void
RoleidCallback(Datum arg, int cacheid, ItemPointer tuplePtr)
RoleidCallback(Datum arg, int cacheid, uint32 hashvalue)
{
/* Invalidate our local cache in case role's superuserness changed */
last_roleid = InvalidOid;