Thread: pgsql: Improve psql's tab completion to handle completing attribute

Log Message:
-----------
Improve psql's tab completion to handle completing attribute names in cases
where the relation name was schema-qualified, for example
    UPDATE foo.bar SET <tab>
Also support cases where the relation name was quoted unnecessarily,
for example
    UPDATE "foo" SET <tab>

Greg Sabino Mullane, slightly simplified by myself.

Modified Files:
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    pgsql/src/bin/psql:
        tab-complete.c (r1.169 -> r1.170)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/tab-complete.c?r1=1.169&r2=1.170)