<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 role="column_definition">
       <structfield>numeric_precision</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies a numeric type, this
       column contains the (declared or implicit) precision of the
       type for this column.  The precision indicates the number of
       significant digits.  It can be expressed in decimal (base 10)
       or binary (base 2) terms, as specified in the column
       <literal>numeric_precision_radix</literal>.  For all other data
       types, this column is null.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>numeric_precision_radix</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies a numeric type, this
       column indicates in which base the values in the columns
       <literal>numeric_precision</literal> and
       <literal>numeric_scale</literal> are expressed.  The value is
       either 2 or 10.  For all other data types, this column is null.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>numeric_scale</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies an exact numeric
       type, this column contains the (declared or implicit) scale of
       the type for this column.  The scale indicates the number of
       significant digits to the right of the decimal point.  It can
       be expressed in decimal (base 10) or binary (base 2) terms, as
       specified in the column
       <literal>numeric_precision_radix</literal>.  For all other data
       types, this column is null.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datetime_precision</structfield> <type>cardinal_number</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies a date, time,
       timestamp, or interval type, this column contains the (declared
       or implicit) fractional seconds precision of the type for this
       column, that is, the number of decimal digits maintained
       following the decimal point in the seconds value.  For all
       other data types, this column is null.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>interval_type</structfield> <type>character_data</type>
      </para>
      <para>
       If <literal>data_type</literal> identifies an interval type,
       this column contains the specification which fields the
       intervals include for this column, e.g., <literal>YEAR TO
       MONTH</literal>, <literal>DAY TO SECOND</literal>, etc.  If no
       field restrictions were specified (that is, the interval
       accepts