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Fix estimate_num_groups() to not fail on PlaceHolderVars, per report from

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

2009年4月19日 19:46:33 +0000 (19:46 +0000)

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

2009年4月19日 19:46:33 +0000 (19:46 +0000)

commit 1d97c19a0f748e94b9582dcbaec33ad74be062f9

tree dc701c3e1de608b76284d5ac34e7566c4b7a8b56 tree

parent 3a624e9200bbd8b88d7724e1448fe530f32e2c3c commit | diff

Fix estimate_num_groups() to not fail on PlaceHolderVars, per report from
Stefan Kaltenbrunner. The most reasonable behavior (at least for the near
term) seems to be to ignore the PlaceHolderVar and examine its argument
instead. In support of this, change the API of pull_var_clause() to allow
callers to request recursion into PlaceHolderVars. Currently
estimate_num_groups() is the only customer for that behavior, but where
there's one there may be others.

12 files changed:

src/backend/catalog/heap.c diff | blob | blame | history

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

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

src/backend/optimizer/plan/createplan.c diff | blob | blame | history

src/backend/optimizer/plan/initsplan.c diff | blob | blame | history

src/backend/optimizer/plan/planner.c diff | blob | blame | history

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

src/backend/optimizer/util/placeholder.c diff | blob | blame | history

src/backend/optimizer/util/tlist.c diff | blob | blame | history

src/backend/optimizer/util/var.c diff | blob | blame | history

src/backend/utils/adt/selfuncs.c diff | blob | blame | history

src/include/optimizer/var.h diff | blob | blame | history

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