role="column_definition">
       <structfield>datname</structfield> <type>name</type>
      </para>
      <para>
       Database name
      </para></entry>
     </row>

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

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>encoding</structfield> <type>int4</type>
      </para>
      <para>
       Character encoding for this database
       (<link linkend="pg-encoding-to-char"><function>pg_encoding_to_char()</function></link> can translate
       this number to the encoding name)
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datlocprovider</structfield> <type>char</type>
      </para>
      <para>
       Locale provider for this database: <literal>b</literal> = builtin,
       <literal>c</literal> = libc, <literal>i</literal> = icu </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datistemplate</structfield> <type>bool</type>
      </para>
      <para>
       If true, then this database can be cloned by
       any user with <literal>CREATEDB</literal> privileges;
       if false, then only superusers or the owner of
       the database can clone it.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datallowconn</structfield> <type>bool</type>
      </para>
      <para>
       If false then no one can connect to this database.  This is
       used to protect the <literal>template0</literal> database from being altered.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>dathasloginevt</structfield> <type>bool</type>
      </para>
      <para>
        Indicates that there are login event triggers defined for this database.
        This flag is used to avoid extra lookups on the
        <structname>pg_event_trigger</structname> table during each backend
        startup.  This flag is used internally by <productname>PostgreSQL</productname>
        and should not be manually altered or read for monitoring purposes.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datconnlimit</structfield> <type>int4</type>
      </para>
      <para>
       Sets maximum number of concurrent connections that can be made
       to this database.  -1 means no limit, -2 indicates the database is
       invalid.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datfrozenxid</structfield> <type>xid</type>
      </para>
      <para>
       All transaction IDs before this one have been replaced with a permanent
       (<quote>frozen</quote>) transaction ID in this database.  This is used to
       track whether the database needs to be vacuumed in order to prevent
       transaction ID wraparound or to allow <literal>pg_xact</literal> to be shrunk.
       It is the minimum of the per-table
       <link linkend="catalog-pg-class"><structname>pg_class</structname></link>.<structfield>relfrozenxid</structfield> values.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>datminmxid</structfield> <type>xid</type>
      </para>
      <para>
       All multixact IDs before this one have been replaced with a
       transaction ID in