When I call a stored procedure I get the following error msg, indicating the explain facility is attempting to run. Does anyone know what maybe occurring here to cause explain to run by itself?

C:\>db2 call liq.sp_igis_ost_por_alloc('ZONE1')
SQL0727N An error occurred during implicit system action type "5".
Information returned for the error includes SQLCODE "-219", SQLSTATE "42704"
and message tokens "LIQREP.EXPLAIN_INSTANCE". SQLSTATE=56098

C:\>db2 ? SQL0219


SQL0219N The required Explain table "<name>" does not exist.

Explanation:

The Explain facility has been invoked but was unable to find the
required Explain table "<name>". The Explain tables must be
created prior to invoking Explain.

User Response:

Create the required Explain tables. The SQL Data Definition
Language statements needed to create the Explain tables are
available in the file called EXPLAIN.DDL in the misc directory
under sqllib.

EXPLAIN tables must be in default instance schema.

DB2 Universal Database

My question is why is explain being run at all? We're invoking a stored procedure. We don't want an explain plan.

See body of procedure.