database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-29 10:41:53 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

23
src/backend/optimizer/plan/setrefs.c
View File

@ -15,6 +15,7 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/transam.h"
#include "catalog/pg_type.h"
#include "nodes/makefuncs.h"
@ -1751,25 +1752,21 @@ record_plan_function_dependency(PlannerGlobal *glob, Oid funcid)
*/
if (funcid >= (Oid) FirstBootstrapObjectId)
{
HeapTuple func_tuple;
PlanInvalItem *inval_item;
func_tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
if (!HeapTupleIsValid(func_tuple))
elog(ERROR, "cache lookup failed for function %u", funcid);
inval_item = makeNode(PlanInvalItem);
PlanInvalItem *inval_item = makeNode(PlanInvalItem);
/*
* It would work to use any syscache on pg_proc, but plancache.c
* expects us to use PROCOID.
* It would work to use any syscache on pg_proc, but the easiest is
* PROCOID since we already have the function's OID at hand. Note
* that plancache.c knows we use PROCOID. Also, we're perhaps
* assuming more than we should about how CatalogCacheComputeHashValue
* computes hash values...
*/
inval_item->cacheId = PROCOID;
inval_item->tupleId = func_tuple->t_self;
inval_item->hashValue =
DatumGetUInt32(DirectFunctionCall1(hashoid,
ObjectIdGetDatum(funcid)));
glob->invalItems = lappend(glob->invalItems, inval_item);
ReleaseSysCache(func_tuple);
}
}