(references <link linkend="catalog-pg-proc"><structname>pg_proc</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Deserialization function (zero if none)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggmtransfn</structfield> <type>regproc</type>
       (references <link linkend="catalog-pg-proc"><structname>pg_proc</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Forward transition function for moving-aggregate mode (zero if none)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggminvtransfn</structfield> <type>regproc</type>
       (references <link linkend="catalog-pg-proc"><structname>pg_proc</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Inverse transition function for moving-aggregate mode (zero if none)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggmfinalfn</structfield> <type>regproc</type>
       (references <link linkend="catalog-pg-proc"><structname>pg_proc</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Final function for moving-aggregate mode (zero if none)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggfinalextra</structfield> <type>bool</type>
      </para>
      <para>
       True to pass extra dummy arguments to <structfield>aggfinalfn</structfield>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggmfinalextra</structfield> <type>bool</type>
      </para>
      <para>
       True to pass extra dummy arguments to <structfield>aggmfinalfn</structfield>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggfinalmodify</structfield> <type>char</type>
      </para>
      <para>
       Whether <structfield>aggfinalfn</structfield> modifies the
       transition state value:
       <literal>r</literal> if it is read-only,
       <literal>s</literal> if the <structfield>aggtransfn</structfield>
       cannot be applied after the <structfield>aggfinalfn</structfield>, or
       <literal>w</literal> if it writes on the value
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggmfinalmodify</structfield> <type>char</type>
      </para>
      <para>
       Like <structfield>aggfinalmodify</structfield>, but for
       the <structfield>aggmfinalfn</structfield>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggsortop</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-operator"><structname>pg_operator</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Associated sort operator (zero if none)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggtranstype</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-type"><structname>pg_type</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Data type of the aggregate function's internal transition (state) data
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>aggtransspace</structfield> <type>int4</type>
      </para>
      <para>
       Approximate average size (in bytes) of the transition state
       data, or zero to use a default