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Suppress subquery pullup/pushdown when a subquery contains volatile

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

2006年8月19日 02:48:53 +0000 (02:48 +0000)

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

2006年8月19日 02:48:53 +0000 (02:48 +0000)

commit fb9e56eea11a970e574260b82d6b05b4fe5a4308

tree 7121fa2a8dc512d9679f4ac3a029f06618f203c5 tree

parent 9bf760f7dec703aa34d9bd68aaa982943d24411e commit | diff

Suppress subquery pullup/pushdown when a subquery contains volatile
functions in its targetlist, to avoid introducing multiple evaluations
of volatile functions that textually appear only once. This is a
slightly tighter version of Jaime Casanova's recent patch.

src/backend/optimizer/path/allpaths.c diff | blob | blame | history

src/backend/optimizer/prep/prepjointree.c diff | blob | blame | history

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