<type>text</type> )
        <returnvalue>text</returnvalue>
       </para>
       <para>
        Computes the MD5 <link linkend="functions-hash-note">hash</link> of
        the argument, with the result written in hexadecimal.
       </para>
       <para>
        <literal>md5('abc')</literal>
        <returnvalue>900150983cd24fb0&zwsp;d6963f7d28e17f72</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>parse_ident</primary>
        </indexterm>
        <function>parse_ident</function> ( <parameter>qualified_identifier</parameter> <type>text</type>
        <optional>, <parameter>strict_mode</parameter> <type>boolean</type> <literal>DEFAULT</literal> <literal>true</literal> </optional> )
        <returnvalue>text[]</returnvalue>
       </para>
       <para>
        Splits <parameter>qualified_identifier</parameter> into an array of
        identifiers, removing any quoting of individual identifiers.  By
        default, extra characters after the last identifier are considered an
        error; but if the second parameter is <literal>false</literal>, then such
        extra characters are ignored. (This behavior is useful for parsing
        names for objects like functions.) Note that this function does not
        truncate over-length identifiers. If you want truncation you can cast
        the result to <type>name[]</type>.
       </para>
       <para>
        <literal>parse_ident('"SomeSchema".someTable')</literal>
        <returnvalue>{SomeSchema,sometable}</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>pg_client_encoding</primary>
        </indexterm>
        <function>pg_client_encoding</function> ( )
        <returnvalue>name</returnvalue>
       </para>
       <para>
        Returns current client encoding name.
       </para>
       <para>
        <literal>pg_client_encoding()</literal>
        <returnvalue>UTF8</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>quote_ident</primary>
        </indexterm>
        <function>quote_ident</function> ( <type>text</type> )
        <returnvalue>text</returnvalue>
       </para>
       <para>
        Returns the given string suitably quoted to be used as an identifier
        in an <acronym>SQL</acronym> statement string.
        Quotes are added only if necessary (i.e., if the string contains
        non-identifier characters or would be case-folded).
        Embedded quotes are properly doubled.
        See also <xref linkend="plpgsql-quote-literal-example"/>.
       </para>
       <para>
        <literal>quote_ident('Foo bar')</literal>
        <returnvalue>"Foo bar"</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>quote_literal</primary>
        </indexterm>
        <function>quote_literal</function> ( <type>text</type> )
        <returnvalue>text</returnvalue>
       </para>
       <para>
        Returns the given string suitably quoted to be used as a string literal
        in an <acronym>SQL</acronym> statement string.
        Embedded single-quotes and backslashes are properly doubled.
        Note that <function>quote_literal</function> returns null on null
        input; if the argument might be null,
        <function>quote_nullable</function> is often more suitable.
        See also <xref linkend="plpgsql-quote-literal-example"/>.
       </para>
       <para>
        <literal>quote_literal(E'O\'Reilly')</literal>
        <returnvalue>'O''Reilly'</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <function>quote_literal</function>