Обсуждение: pgsql: Add new SQL:2008 error codes for invalid LIMIT and OFFSET values.

Log Message:
-----------
Add new SQL:2008 error codes for invalid LIMIT and OFFSET values.  Remove
unused nonstandard error code that was perhaps intended for this but never
used.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        errcodes.sgml (r1.26 -> r1.27)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/errcodes.sgml?r1=1.26&r2=1.27)
    pgsql/src/backend/executor:
        nodeLimit.c (r1.35 -> r1.36)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeLimit.c?r1=1.35&r2=1.36)
    pgsql/src/include/utils:
        errcodes.h (r1.28 -> r1.29)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/errcodes.h?r1=1.28&r2=1.29)
    pgsql/src/pl/plpgsql/src:
        plerrcodes.h (r1.17 -> r1.18)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/plerrcodes.h?r1=1.17&r2=1.18)