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Revise sinval code to remove no-longer-used tuple TID from inval messages.
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.
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@ -845,9 +845,7 @@ _outPlanInvalItem(StringInfo str, PlanInvalItem *node)
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WRITE_NODE_TYPE("PLANINVALITEM");
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WRITE_INT_FIELD(cacheId);
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appendStringInfo(str, " :tupleId (%u,%u)",
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ItemPointerGetBlockNumber(&node->tupleId),
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ItemPointerGetOffsetNumber(&node->tupleId));
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WRITE_UINT_FIELD(hashValue);
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}
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/*****************************************************************************
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