Log Message: ----------- Fix a bug in 8.2.x that was exposed while investigating Kevin Grittner's report of poor planning in 8.3: it's unsafe to push a constant across an outer join when the outer-join condition is delayed by lower outer joins, unless we recheck the outer-join condition at the upper outer join. 8.2.x doesn't really have the ability to tell whether this is the case or not, but fortunately it doesn't matter --- it seems most desirable to keep the join condition whether it's entirely redundant or not. However, it's usually mostly redundant, so force its selectivity to 1.0. It might be a good idea to back-patch this into 8.1 as well, but I'll refrain until/unless there's evidence that 8.1 actually fails on any cases that this would fix. Tags: ---- REL8_2_STABLE Modified Files: -------------- pgsql/src/backend/optimizer/path: pathkeys.c (r1.79 -> r1.79.2.1) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/pathkeys.c?r1=1.79&r2=1.79.2.1) pgsql/src/test/regress/expected: join.out (r1.28.2.4 -> r1.28.2.5) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/join.out?r1=1.28.2.4&r2=1.28.2.5) join_1.out (r1.10.2.4 -> r1.10.2.5) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/join_1.out?r1=1.10.2.4&r2=1.10.2.5) pgsql/src/test/regress/sql: join.sql (r1.19.2.4 -> r1.19.2.5) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/join.sql?r1=1.19.2.4&r2=1.19.2.5)
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