pgsql: Fix oversight in 8.0 modification of RestrictInfo data

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От tgl@svr1.postgresql.org (Tom Lane)
Тема pgsql: Fix oversight in 8.0 modification of RestrictInfo data
Дата
Msg-id 20051011164440.85603D70F5@svr1.postgresql.org
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Log Message:
-----------
Fix oversight in 8.0 modification of RestrictInfo data structures.
A RestrictInfo representing an OR clause now contains two versions of
the contained expression, one with sub-RestrictInfos and one without.
clause_selectivity() should descend to the version with sub-RestrictInfos
so that it has a chance of caching its results for the OR's sub-clauses.
Failing to do so resulted in redundant planner effort.

Modified Files:
--------------
    pgsql/src/backend/optimizer/path:
        clausesel.c (r1.73 -> r1.74)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/clausesel.c.diff?r1=1.73&r2=1.74)

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