A fix is available
APAR status
Closed as program error.
Error description
If a subselect is used in a set operation, the select-list of the subselect includes an inlined SQL function reference, and an argument to the SQL function is an OLAP specification, then query compilation may fail with SQLCODE -421. For example: CREATE OR REPLACE FUNCTION MYFUNCTION (i INT) RETURNS INT LANGUAGE SQL RETURN i; select * from t1 union all select myfunction(row_number() over ())) from t2; SQL0421N The operands of a set operator or a VALUES clause do not have the same number of columns. SQLSTATE=42826
Local fix
There are three workarounds: 1. Change the order of the UNION/EXCEPT/INTERSECT oprands 2. Change the inlined SQL UDF to compiled by specifying BEGIN without ATOMIC, e.g.: CREATE OR REPLACE FUNCTION MYFUNCTION (i INT) RETURNS INT LANGUAGE SQL BEGIN RETURN i; -- END; 3. Change the subquery to a fullselect by surrounding it with parentheses, e.g.: select * from t1 union all ( select myfunction(row_number() over ())) from t2 );
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 version 11.1.4.7 * ****************************************************************
Problem conclusion
First fixed in Db2 version 11.1.4.7
Temporary fix
Comments
APAR Information
APAR number
IT32967
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-05-25
Closed date
2022-04-17
Last modified date
2022-04-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 FOR LUW
Fixed component ID
DB2FORLUW
Applicable component levels
RB10 PSN
UP
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Document Information
Modified date:
04 May 2022