pgsql/src/backend/optimizer/path costsize.c

pgsql/src/backend/optimizer/path costsize.c

Post by Tom La » Sun, 03 Mar 2002 05:57:38



CVSROOT:        /cvsroot
Module name:    pgsql

Modified files:
        src/backend/optimizer/path: costsize.c

Log message:
        Fix thinko: cost_mergejoin must pay attention to which side of the
        mergeclause is which when extracting selectivity info.

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1. pgsql/src/backend/optimizer/path costsize.c

CVSROOT:        /home/projects/pgsql/cvsroot
Module name:    pgsql

Modified files:
        src/backend/optimizer/path: costsize.c

Log message:
        Fix thinko in hash cost estimation: average frequency
        should be computed from total number of distinct values in whole
        relation, not # distinct values we expect to have after restriction
        clauses are applied.

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