Log Message: ----------- Fix best_inner_indexscan to return both the cheapest-total-cost and cheapest-startup-cost innerjoin indexscans, and make joinpath.c consider both of these (when different) as the inside of a nestloop join. The original design was based on the assumption that indexscan paths always have negligible startup cost, and so total cost is the only important figure of merit; an assumption that's obviously broken by bitmap indexscans. This oversight could lead to choosing poor plans in cases where fast-start behavior is more important than total cost, such as LIMIT and IN queries. 8.1-vintage brain fade exposed by an example from Chuck D. Tags: ---- REL8_2_STABLE Modified Files: -------------- pgsql/src/backend/nodes: outfuncs.c (r1.285 -> r1.285.2.1) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/outfuncs.c.diff?r1=1.285&r2=1.285.2.1) pgsql/src/backend/optimizer/path: indxpath.c (r1.212.2.1 -> r1.212.2.2) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/indxpath.c.diff?r1=1.212.2.1&r2=1.212.2.2) joinpath.c (r1.107 -> r1.107.2.1) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/joinpath.c.diff?r1=1.107&r2=1.107.2.1) pgsql/src/include/nodes: relation.h (r1.128.2.1 -> r1.128.2.2) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/relation.h.diff?r1=1.128.2.1&r2=1.128.2.2) pgsql/src/include/optimizer: paths.h (r1.93.2.1 -> r1.93.2.2) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/optimizer/paths.h.diff?r1=1.93.2.1&r2=1.93.2.2)
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