SQLWARNING Keyword
If you use the SQLWARNING keyword, any SQL statement
that generates a warning is handled as the WHENEVER SQLWARNING statement
directs. If a warning occurs, the first field (sqlca.sqlwarn.sqlwarn0)
of the warning structure in SQLCA is set to W, and
the SQLSTATE variable is set to a class code of 01.
Besides the first field of the warning structure, a warning
also sets an additional field to W. The field that
is set indicates what type of warning occurred.
WHENEVER SQLWARNING STOP
If you do not use any WHENEVER SQLWARNING statements in a program, the default action for WHENEVER SQLWARNING is CONTINUE.