"user procedure processing of logical standby apply DDL"
*Cause: A user provided stored procedure has been called to inspect
a DDL statement prior to it being processed.
*Action: No action necessary, this informational statement is provided
to record user involvement in the processing of a statement.
Additional information can be found in the DBA_LOGSTDBY_EVENTS
and the DBA_LOGSTDBY_SKIP views.