<literal>r</literal> = ready (normal replication)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>srsublsn</structfield> <type>pg_lsn</type>
      </para>
      <para>
       Remote LSN of the state change used for synchronization coordination
       when in <literal>s</literal> or <literal>r</literal> states,
       otherwise null
      </para></entry>
     </row>
    </tbody>
   </tgroup>
  </table>
 </sect1>

 <sect1 id="catalog-pg-tablespace">
  <title><structname>pg_tablespace</structname></title>

  <indexterm zone="catalog-pg-tablespace">
   <primary>pg_tablespace</primary>
  </indexterm>

  <para>
   The catalog <structname>pg_tablespace</structname> stores information
   about the available tablespaces.  Tables can be placed in particular
   tablespaces to aid administration of disk layout.
  </para>

  <para>
   Unlike most system catalogs, <structname>pg_tablespace</structname>
   is shared across all databases of a cluster: there is only one
   copy of <structname>pg_tablespace</structname> per cluster, not
   one per database.
  </para>

  <table>
   <title><structname>pg_tablespace</structname> Columns</title>
   <tgroup cols="1">
    <thead>
     <row>
      <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>oid</structfield> <type>oid</type>
      </para>
      <para>
       Row identifier
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>spcname</structfield> <type>name</type>
      </para>
      <para>
       Tablespace name
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>spcowner</structfield> <type>oid</type>
       (references <link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.<structfield>oid</structfield>)
      </para>
      <para>
       Owner of the tablespace, usually the user who created it
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>spcacl</structfield> <type>aclitem[]</type>
      </para>
      <para>
       Access privileges; see <xref linkend="ddl-priv"/> for details
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>spcoptions</structfield> <type>text[]</type>
      </para>
      <para>
       Tablespace-level options, as <quote>keyword=value</quote> strings
      </para></entry>
     </row>
    </tbody>
   </tgroup>
  </table>
 </sect1>


 <sect1 id="catalog-pg-transform">
  <title><structname>pg_transform</structname></title>

  <indexterm zone="catalog-pg-transform">
   <primary>pg_transform</primary>
  </indexterm>

  <para>
   The catalog <structname>pg_transform</structname> stores information about
   transforms, which are a mechanism to adapt data types to procedural
   languages.  See <xref linkend="sql-createtransform"/> for more information.
  </para>

  <table>
   <title><structname>pg_transform</structname> Columns</title>
   <tgroup cols="1">
    <thead>
     <row>
      <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>oid</structfield> <type>oid</type>
      </para>
      <para>
       Row identifier
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>trftype</structfield>