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10.06.2008 at 11:30AM PDT, ID: 23791394
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8.0

UDF in MQT definition

Asked by volking in DB2 Database, AS / 400

Can an MQT definition include a UDF value.
Like this ...
-----------------------------------------
CREATE TABLE MyLIB.MyMQT
(fldA, fldB, fldC)
AS
(
    SELECT
        T1.X as fldA,
        MyLib.MyUDF(T1.Y) as fldB,
        T1.Z as fldC
    FROM MyLib.Table01 T1
)
DATA INITIALLY IMMEDIATE
REFRESH DEFERRED
MAINTAINED BY USER
ENABLE QUERY OPTIMIZATION;
-----------------
    I get error ...
    SQL State: 428EC
    Vendor Code: -20058
    Message: [SQ20058] Subselect for materialized query table SALINDMQ0 not valid for reason code 6. Cause . . . . . :
        6 -- Refers to a function that has an external action or that is not deterministic
-----------------
Here's the function definition ....
-----------------
CREATE FUNCTION MyLIB.MyUDF (
     PARAM1 VARCHAR(12) )
     RETURNS NUMERIC(10, 2)  
     LANGUAGE SQL
     SPECIFIC MyLIB.MyUDF
     DETERMINISTIC
     MODIFIES SQL DATA
     CALLED ON NULL INPUT
     DISALLOW PARALLEL
     BEGIN
     DECLARE RET NUMERIC ( 10 , 2 ) ;
     SELECT SUM ( TQ . MyVal )
          INTO RET
          FROM MyLib.TablQQQQ TQ
          WHERE TQ.LookUp = PARAM1 ;
     RETURN RET ;
END  ;
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[+][-]10.06.2008 at 11:44PM PDT, ID: 22656949

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[+][-]10.07.2008 at 06:08AM PDT, ID: 22658953

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[+][-]10.07.2008 at 03:38PM PDT, ID: 22664603

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About this solution

Zones: DB2 Database, AS / 400
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Solution Provided By: tliotta
Participating Experts: 2
Solution Grade: A
 
 
 
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