<entry role="catalog_table_entry"><para role="column_definition">
       Column Type
      </para>
      <para>
       Description
      </para></entry>
     </row>
    </thead>

    <tbody>
     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>table_catalog</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the database containing the table (always the current database)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>table_schema</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the schema containing the table
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>table_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the table
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>column_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the column
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>ordinal_position</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Ordinal position of the column within the table (count starts at 1)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>column_default</structfield> <type>character_data</type>
      </para>
      <para>
       Default expression of the column
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>is_nullable</structfield> <type>yes_or_no</type>
      </para>
      <para>
       <literal>YES</literal> if the column is possibly nullable,
       <literal>NO</literal> if it is known not nullable.  A not-null
       constraint is one way a column can be known not nullable, but
       there can be others.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>data_type</structfield> <type>character_data</type>
      </para>
      <para>
       Data type of the column, if it is a built-in type, or
       <literal>ARRAY</literal> if it is some array (in that case, see
       the view <literal>element_types</literal>), else
       <literal>USER-DEFINED</literal> (in that case, the type is
       identified in <literal>udt_name</literal> and associated
       columns).  If the column is based on a domain, this column
       refers to the type underlying the domain (and the domain is
       identified in <literal>domain_name</literal> and associated
       columns).
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_maximum_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies a character or bit
       string type, the declared maximum length; null for all other
       data types or if no maximum length was declared.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_octet_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies a character type,
       the maximum possible length in octets (bytes) of a datum; null
       for all other data types.  The maximum octet length depends on
       the declared character maximum length (see above) and the
       server encoding.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para