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Revise cost_qual_eval() to compute both startup (one-time) and per-tuple

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

2003年1月12日 22:35:29 +0000 (22:35 +0000)

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

2003年1月12日 22:35:29 +0000 (22:35 +0000)

commit d4ce5a4f4c3516e88fa34c53bcc7313db90a3c08

tree 4c6b53e1c1e0989a9f45fe42ab6f29ffac019c03 tree

parent d51260aa9d36653f4d63e6df133ddff8380f61b2 commit | diff

Revise cost_qual_eval() to compute both startup (one-time) and per-tuple
costs for expression evaluation, not only per-tuple cost as before.
This extension is needed in order to deal realistically with hashed or
materialized sub-selects.

doc/src/sgml/indexcost.sgml diff | blob | blame | history

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

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

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

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

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

src/include/nodes/relation.h diff | blob | blame | history

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

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