According to SQLCODE, we can know that this exception is to put a non-null field into a null value
- First query the specific error table
select * from syscat.tables where tbspaceid='3' and tableid='514'
- Then query specific fields according to the query results
select * from syscat.columns where tabschema='APSADMIN' and tabname='T_APS_USER' and colno='29'
Reference: https://www.jianshu.com/p/c8d8adfb151c