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Avoid O(N^2) overhead in repeated nocachegetattr calls when columns of

author Tom Lane <tgl@sss.pgh.pa.us>

2005年3月14日 04:41:13 +0000 (04:41 +0000)

committer Tom Lane <tgl@sss.pgh.pa.us>

2005年3月14日 04:41:13 +0000 (04:41 +0000)

commit a9b05bdc8330b378cd2df7910ca0beaa500223fa

tree 18be88094b6d17df65925023582e84c34bf152db tree

parent d1022ce3a1a8b61798028a8fae46e7e458d77cff commit | diff

Avoid O(N^2) overhead in repeated nocachegetattr calls when columns of
a tuple are being accessed via ExecEvalVar and the attcacheoff shortcut
isn't usable (due to nulls and/or varlena columns). To do this, cache
Datums extracted from a tuple in the associated TupleTableSlot.
Also some code cleanup in and around the TupleTable handling.
Atsushi Ogawa with some kibitzing by Tom Lane.

src/backend/access/common/heaptuple.c diff | blob | blame | history

src/backend/access/heap/tuptoaster.c diff | blob | blame | history

src/backend/executor/execJunk.c diff | blob | blame | history

src/backend/executor/execQual.c diff | blob | blame | history

src/backend/executor/execTuples.c diff | blob | blame | history

src/include/access/heapam.h diff | blob | blame | history

src/include/executor/executor.h diff | blob | blame | history

src/include/executor/tuptable.h diff | blob | blame | history

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