pgsql-server/src backend/optimizer/plan/create ...

CVSROOT:    /cvsroot
Module name:    pgsql-server
Changes by:    tgl@svr1.postgresql.org    03/08/07 16:20:24

Modified files:
    src/backend/optimizer/plan: createplan.c
    src/backend/parser: parse_clause.c
    src/include/parser: parse_clause.h
    src/test/regress/expected: join.out
    src/test/regress/sql: join.sql

Log message:
    create_unique_plan() should not discard existing output columns of the
    subplan it starts with, as they may be needed at upper join levels.
    See comments added to code for the non-obvious reason why.  Per bug report
    from Robert Creager.