s-aggregate.html#FUNCTIONS-AGGREGATE-TABLE"
><CODE
CLASS="FUNCTION"
>string_agg()</CODE
></A
>
        to process <TT
CLASS="TYPE"
>bytea</TT
> values (Pavel Stehule)
       </P
></LI
><LI
><P
>        Fix regular expressions in which a back-reference occurs within
        a larger quantified subexpression (Tom Lane)
       </P
><P
>        For example, <TT
CLASS="LITERAL"
>^(\w+)( \1)+$</TT
>.  Previous releases did not
        check that the back-reference actually matched the first occurrence.
       </P