</para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-goto">
      <term><literal>GOTO <replaceable>label</replaceable></literal></term>
      <term><literal>GO TO <replaceable>label</replaceable></literal></term>
      <listitem>
       <para>
        Jump to the specified label (using a C <literal>goto</literal>
        statement).
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-sqlprint">
      <term><literal>SQLPRINT</literal></term>
      <listitem>
       <para>
        Print a message to standard error.  This is useful for simple
        programs or during prototyping.  The details of the message
        cannot be configured.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-stop">
      <term><literal>STOP</literal></term>
      <listitem>
       <para>
        Call <literal>exit(1)</literal>, which will terminate the
        program.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-do-break">
      <term><literal>DO BREAK</literal></term>
      <listitem>
       <para>
        Execute the C statement <literal>break</literal>.  This should
        only be used in loops or <literal>switch</literal> statements.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-do-continue">
      <term><literal>DO CONTINUE</literal></term>
      <listitem>
       <para>
        Execute the C statement <literal>continue</literal>.  This should
        only be used in loops statements.  if executed, will cause the flow
        of control to return to the top of the loop.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="ecpg-whenever-call">
      <term><literal>CALL <replaceable>name</replaceable> (<replaceable>args</replaceable>)</literal></term>
      <term><literal>DO <replaceable>name</replaceable> (<replaceable>args</replaceable>)</literal></term>
      <listitem>
       <para>
        Call the specified C functions with the specified arguments.  (This
        use is different from the meaning of <literal>CALL</literal>
        and <literal>DO</literal> in the normal PostgreSQL grammar.)
       </para>
      </listitem>
     </varlistentry>
    </variablelist>

    The SQL standard only provides for the actions
    <literal>CONTINUE</literal> and <literal>GOTO</literal> (and
    <literal>GO TO</literal>).
   </para>

   <para>
    Here is an example that you might want to use in a simple program.
    It prints a simple message when a warning occurs and aborts the
    program when an error happens:
<programlisting>
EXEC SQL WHENEVER SQLWARNING SQLPRINT;
EXEC SQL WHENEVER SQLERROR STOP;
</programlisting>
   </para>

   <para>
    The statement <literal>EXEC SQL WHENEVER</literal> is a directive
    of the SQL preprocessor, not a C statement.  The error or warning
    actions that it sets apply to all embedded SQL statements that
    appear below the point where the handler is set, unless a
    different action was set for the same condition between the first
    <literal>EXEC SQL WHENEVER</literal> and the SQL statement causing
    the condition, regardless of the flow of control in the C program.
    So neither of the two following C program excerpts will have the
    desired effect:
<programlisting>
/*
 * WRONG
 */
int main(int argc, char *argv[])
{
    ...
    if (verbose) {
        EXEC SQL WHENEVER SQLWARNING SQLPRINT;
    }
    ...
    EXEC SQL SELECT ...;
    ...
}
</programlisting>

<programlisting>
/*
 * WRONG
 */
int main(int argc, char *argv[])
{
    ...
    set_error_handler();
    ...
    EXEC SQL SELECT ...;
    ...
}

static void set_error_handler(void)
{
    EXEC SQL WHENEVER SQLERROR STOP;
}
</programlisting>
   </para>
  </sect2>

  <sect2 id="ecpg-sqlca">
   <title>sqlca</title>

   <para>
    For more powerful error handling, the embedded SQL interface
    provides a global variable with the