
><P
>        Enables or disables the query planner's use of hash-join plan
        types. The default is <TT
CLASS="LITERAL"
>on</TT
>.
       </P
></DD
><DT
><A
NAME="GUC-ENABLE-INDEXSCAN"
></A
><TT
CLASS="VARNAME"
>enable_indexscan</TT
> (<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
>        Enables or disables the query planner's use of index-scan plan
        types. The default is <TT
CLASS="LITERAL"
>on</TT
>.
       </P
></DD
><DT
><A
NAME="GUC-ENABLE-INDEXONLYSCAN"
></A
><TT
CLASS="VARNAME"
>enable