Details
Minor Description
When the embedded driver raises an SQLException, its stack trace always
says it is created in SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA().
This is not correct.
At some point, SQLExceptionFactory40.getSQLException() set the stack trace
of the SQLException to the stack trace of the non-SQLException that caused
it, if there were one. This was probably done to mimic the behaviour of
EmbedSQLException, which overrides printStackTrace() to achieve the
same. Later, code was added to ferry arguments over DRDA. This code created
a dummy exception which the old code interpreted as a non-SQLException
whose stack trace should be used for the main exception. Therefore, all
exceptions now have the same stack trace as the dummy exception created in
wrapArgsForTransportAcrossDRDA().
I think the best solution is not to set the stack trace explicitly, not
even when the SQLException is caused by a non-SQLException.
EmbedSQLException overrides printStackTrace() because throwables in Java
1.3 didn't have initCause()/getCause(), so it was the only way to preserve
the original stack trace. Since the SQLExceptions in JDBC 4.0 have
initCause()/getCause(), there is no reason why the JDBC4 driver should
mimic EmbedSQLException's workaround for not having these methods.