linkend="catalog-pg-namespace"><structname>pg_namespace</structname></link>.<structfield>nspname</structfield>)
      </para>
      <para>
       Name of schema containing extended statistics object
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>statistics_name</structfield> <type>name</type>
       (references <link linkend="catalog-pg-statistic-ext"><structname>pg_statistic_ext</structname></link>.<structfield>stxname</structfield>)
      </para>
      <para>
       Name of extended statistics object
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>statistics_owner</structfield> <type>name</type>
       (references <link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.<structfield>rolname</structfield>)
      </para>
      <para>
       Owner of the extended statistics object
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>expr</structfield> <type>text</type>
      </para>
      <para>
       Expression included in the extended statistics object
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>inherited</structfield> <type>bool</type>
       (references <link linkend="catalog-pg-statistic-ext-data"><structname>pg_statistic_ext_data</structname></link>.<structfield>stxdinherit</structfield>)
      </para>
      <para>
       If true, the stats include values from child tables, not just the
       values in the specified relation
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>null_frac</structfield> <type>float4</type>
      </para>
      <para>
       Fraction of expression entries that are null
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>avg_width</structfield> <type>int4</type>
      </para>
      <para>
       Average width in bytes of expression's entries
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>n_distinct</structfield> <type>float4</type>
      </para>
      <para>
       If greater than zero, the estimated number of distinct values in the
       expression.  If less than zero, the negative of the number of distinct
       values divided by the number of rows.  (The negated form is used when
       <command>ANALYZE</command> believes that the number of distinct values is
       likely to increase as the table grows; the positive form is used when
       the expression seems to have a fixed number of possible values.)  For
       example, -1 indicates a unique expression in which the number of distinct
       values is the same as the number of rows.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>most_common_vals</structfield> <type>anyarray</type>
      </para>
      <para>
       A list of the most common values in the expression. (Null if
       no values seem to be more common than any others.)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>most_common_freqs</structfield> <type>float4[]</type>
      </para>
      <para>
       A list of the frequencies of the most common values,
       i.e., number of occurrences of each divided by total number of rows.
       (Null when <structfield>most_common_vals</structfield> is.)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>histogram_bounds</structfield> <type>anyarray</type>