the <TT
CLASS="COMMAND"
>configure</TT
> option
        <TT
CLASS="OPTION"
>--enable-cassert</TT
>). Note that
        <TT
CLASS="VARNAME"
>debug_assertions</TT
> defaults to <TT
CLASS="LITERAL"
>on</TT
>
        if <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> has been built with
        assertions enabled.
       </P
></DD
><DT
><A
NAME="GUC-IGNORE-SYSTEM-INDEXES"
></A
><TT
CLASS="VARNAME"
>ignore_system_indexes</TT
> (<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
>        Ignore system indexes when readi