UDB scalar functions and parameter markers

Question

Hello,
While using Prepared Statements in combination with UDB scalar functions (translate UDB function, for example), I get a Parameter marker error. The SQL statement works fine as an independent query.
SQL Query example from UDB manual used as is:
UPDATE EMPLOYEE
SET LASTNAME = TRANSLATE(CAST(? AS VARCHAR(12)))
WHERE EMPNO = ? When the above query is used as a Java prepared statement, an invalid parameter marker error occurs.
Any ideas?
Thanks.

Answer 1

Personally, I'd try that SQL as:
UPDATE EMPLOYEE
SET LASTNAME =  CAST (UPPER(?) AS VARCHAR(12) )
WHERE EMPNO = ? not least because it makes the action of the translation explicit, but mostly because other DBs that have a TRANSLATE function don't support the "1 parameter implicitly means upper case" form you're using (at first, I thought you were getting a bogus message for a mangled function call, but then I dug out the old DB2 docs and saw what the hell the TRANSLATE was intended to do here..)
Also, my (old) reference doesn't list a CAST function, although it's certainly not up to date; instead it shows casting done in this style:
UPDATE EMPLOYEE
SET LASTNAME =  VARCHAR (UPPER(?) , 12)
WHERE EMPNO = ? It doesn't show a VARCHAR2 function either, but I'd guess they're type-compatible in this application... hope this gives you something else to try...