qlca</TT
> is not defined in the SQL
    standard, but is implemented in several other SQL database
    systems.  The definitions are similar at the core, but if you want
    to write portable applications, then you should investigate the
    different implementations carefully.
   </P
><P
>    Here is one example that combines the use of <TT
CLASS="LITERAL"
>WHENEVER</TT
>
    and <TT
CLASS="VARNAME"
>sqlca</TT
>, printing out the contents
    of <TT
CLASS="VARNAME"
>sqlca</TT
> when an error occurs.  This