A SQL-420 error can occur during Action processing when executing a Database Analyzer for Db2 for z/OS (PDA) Extract Procedure.
DSNT408I SQLCODE = -420, ERROR: THE VALUE OF A STRING ARGUMENT WAS NOT
ACCEPTABLE TO THE DECFLOAT FUNCTION
The failing SELECT statement is displayed immediately after the error message. The SELECT statement is a valid statement.
Db2 version 11 or 12.
IBM APAR PH10882: SQLCODE420 OCCURRED WHEN A QUERY HAS A PREDICATE COMPARING A DOUBLE COLUMN WITH A DECIMAL VALUE
This is a DB2 problem as reported in IBM APAR PH10882. Please refer to this APAR for further details and appropriate fixes for Db2 11 and Db2 12.