<type>bigint</type>
      </para>
      <para>
       Total number of heap blocks that will be sampled.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>sample_blks_scanned</structfield> <type>bigint</type>
      </para>
      <para>
       Number of heap blocks scanned.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>ext_stats_total</structfield> <type>bigint</type>
      </para>
      <para>
       Number of extended statistics.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>ext_stats_computed</structfield> <type>bigint</type>
      </para>
      <para>
       Number of extended statistics computed. This counter only advances
       when the phase is <literal>computing extended statistics</literal>.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>child_tables_total</structfield> <type>bigint</type>
      </para>
      <para>
       Number of child tables.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>child_tables_done</structfield> <type>bigint</type>
      </para>
      <para>
       Number of child tables scanned. This counter only advances when the
       phase is <literal>acquiring inherited sample rows</literal>.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>current_child_table_relid</structfield> <type>oid</type>
      </para>
      <para>
       OID of the child table currently being scanned. This field is
       only valid when the phase is
       <literal>acquiring inherited sample rows</literal>.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>delay_time</structfield> <type>double precision</type>
      </para>
      <para>
       Total time spent sleeping due to cost-based delay (see
       <xref linkend="runtime-config-resource-vacuum-cost"/>, in milliseconds
       (if <xref linkend="guc-track-cost-delay-timing"/> is enabled, otherwise
       zero).
      </para></entry>
     </row>
    </tbody>
   </tgroup>
  </table>

  <table id="analyze-phases">
   <title>ANALYZE Phases</title>
   <tgroup cols="2">
    <colspec colname="col1" colwidth="1*"/>
    <colspec colname="col2" colwidth="2*"/>
    <thead>
     <row>
      <entry>Phase</entry>
      <entry>Description</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry><literal>initializing</literal></entry>
      <entry>
       The command is preparing to begin scanning the heap.  This phase is
       expected to be very brief.
      </entry>
     </row>
     <row>
      <entry><literal>acquiring sample rows</literal></entry>
      <entry>
       The command is currently scanning the table given by
       <structfield>relid</structfield> to obtain sample rows.
      </entry>
     </row>
     <row>
      <entry><literal>acquiring inherited sample rows</literal></entry>
      <entry>
       The command is currently scanning child tables to obtain sample rows.
       Columns <structfield>child_tables_total</structfield>,
       <structfield>child_tables_done</structfield>, and
       <structfield>current_child_table_relid</structfield> contain the
       progress information for this phase.
      </entry>
     </row>
     <row>
      <entry><literal>computing statistics</literal></entry>
      <entry>
       The command is computing statistics from the sample rows obtained
       during the table scan.
      </entry>
     </row>
     <row>
      <entry><literal>computing extended statistics</literal></entry>
      <entry>
       The