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><A
NAME="CATALOG-PG-POLICY"
>50.37. <TT
CLASS="STRUCTNAME"
>pg_policy</TT
></A
></H1
><P
>   The catalog <TT
CLASS="STRUCTNAME"
>pg_policy</TT
> stores row level
   security policies for tables.  A policy includes the kind of
   command that it applies to (possibly all commands), the roles that it
   applies to, the expression to be added as a security-barrier
   qualification to queries that include the table, and the expression
   to be added as a <TT
CLASS="LITERAL"
>WITH CHECK</TT
> option for queries that attempt to
   add new records to the table.
  </P
><DIV
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><P
><B
>Table 50-37. <TT
CLASS="STRUCTNAME"
>pg_policy</TT
> Columns</B
></P
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><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>References</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polname</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
>&nbsp;</TD
><TD
>The name of the policy</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polrelid</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-class.html"
><TT
CLASS="STRUCTNAME"
>pg_class</TT
></A
>.oid</TT
></TD
><TD
>The table to which the policy applies</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polcmd</TT
></TD
><TD
><TT
CLASS="TYPE"
>char</TT
></TD
><TD
>&nbsp;</TD
><TD
>The command type to which the policy is applied:
       <TT
CLASS="LITERAL"
>r</TT
> for <TT
CLASS="COMMAND"
>SELECT</TT
>,
       <TT
CLASS="LITERAL"
>a</TT
> for <TT
CLASS="COMMAND"
>INSERT</TT
>,
       <TT
CLASS="LITERAL"
>w</TT
> for <TT
CLASS="COMMAND"
>UPDATE</TT
>,
       <TT
CLASS="LITERAL"
>d</TT
> for <TT
CLASS="COMMAND"
>DELETE</TT
>,
       or <TT
CLASS="LITERAL"
>*</TT
> for all</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polroles</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid[]</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-authid.html"
><TT
CLASS="STRUCTNAME"
>pg_authid</TT
></A
>.oid</TT
></TD
><TD
>The roles to which the policy is applied</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polqual</TT
></TD
><TD
><TT
CLASS="TYPE"
>pg_node_tree</TT
></TD
><TD
>&nbsp;</TD
><TD
>The expression tree to be added to the security barrier qualifications for queries that use the table</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>polwithcheck</TT
></TD
><TD
><TT
CLASS="TYPE"
>pg_node_tree</TT
></TD
><TD
>&nbsp;</TD
><TD
>The expression tree to be added to the WITH CHECK qualifications for queries that attempt to add rows to the table</TD
></TR
></TBODY
></TABLE
></DIV
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>    Policies stored in <TT
CLASS="STRUCTNAME"
>pg_policy</TT
> are applied only when
    <TT
CLASS="STRUCTNAME"
>pg_class</TT
>.<TT
CLASS="STRUCTFIELD"
>relrowsecurity</TT
> is set for
    their table.
   </P
></BLOCKQUOTE
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