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Optimizer can now estimate selectivity of IS NULL, IS NOT NULL,

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

2001年6月25日 21:11:45 +0000 (21:11 +0000)

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

2001年6月25日 21:11:45 +0000 (21:11 +0000)

commit 4d58a7ca878bbb0a252e1d8175a7ea3a385c1d9e

tree e4e6dae9e84149ea8ffe2e6d7c35cf101b6b10ab tree

parent c31545af2720591b21ad0039b3160225acd328b9 commit | diff

Optimizer can now estimate selectivity of IS NULL, IS NOT NULL,
IS TRUE, etc, with some degree of verisimilitude. Split out
selectivity support functions from builtins.h into a new header
file selfuncs.h, so as to reduce the number of header files builtins.h
must depend on. Fix a few missing inclusions exposed thereby.
From Joe Conway, with some kibitzing from Tom Lane.

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

src/backend/commands/comment.c diff | blob | blame | history

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

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

src/backend/parser/analyze.c diff | blob | blame | history

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

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

src/include/utils/builtins.h diff | blob | blame | history

src/include/utils/selfuncs.h [new file with mode: 0644] blob

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