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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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3
src/backend/nodes/copyfuncs.c
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@ -964,8 +964,7 @@ _copyPlanInvalItem(PlanInvalItem *from)
PlanInvalItem *newnode = makeNode(PlanInvalItem);
COPY_SCALAR_FIELD(cacheId);
/* tupleId isn't really a "scalar", but this works anyway */
COPY_SCALAR_FIELD(tupleId);
COPY_SCALAR_FIELD(hashValue);
return newnode;
}