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

CVSROOT:    /cvsroot
Module name:    pgsql
Changes by:    tgl@postgresql.org    01/11/11 15:33:53

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

Log message:
    In find_mergeclauses_for_pathkeys, it's okay to return multiple merge
    clauses per path key.  Indeed, we *must* do so or we will be unable to
    form a valid plan for FULL JOIN with overlapping join conditions, eg
    select * from a full join b on
    a.v1 = b.v1 and a.v2 = b.v2 and a.v1 = b.v2.