COALESCE with NULL parameter problem
------------------------------------
Key: DERBY-1904
URL: http://issues.apache.org/jira/browse/DERBY-1904
Project: Derby
Issue Type: Bug
Components: JDBC, SQL
Affects Versions: 10.1.3.1
Environment: Windows 2000 SP4
JSTL 1.0.6 on J2EE 1.3
Tomcat 5.0.28 using a SUN JVM 1.4.2_03
Reporter: Cédric Gérard
Priority: Blocker
Hi,
My initial objective was to execute this query with the JSTL sql tag library
:
SELECT ID_ITM, ITM_NAME, ITM_CODE
FROM ITEMS
WHERE ITM_CODE = COALESCE(?,ITM_CODE)
ITM_CODE is a NUMERIC column, here's the DDL script of the ITEMS table :
CREATE TABLE ITEMS (
ID_ITM BIGINT NOT NULL GENERATED ALWAYS AS IDENTITY,
ITM_CODE NUMERIC (22) NOT NULL
);
When ITM_CODE is not set in my application, JSTL bind the parameter as null.
When ITM_CODE is set, it works.
I got this message error :
: Invalid data conversion: Parameter object type is invalid for requested
conversion. (Apache
Derby release 10.1.3.1 client driver)
=> We try to use CAST(? AS NUMERIC) in place of ?. We obtain the same error
when NULL is passed.
: The exception 'java.lang.ArrayIndexOutOfBoundsException: -1' was thrown
while evaluating
an expression. SQLSTATE: XJ001: Java exception: '-1:
java.lang.ArrayIndexOutOfBoundsException'.
(Apache Derby snapshot-10.2.0.4 client driver)
With ij, we have the same problem (but not the same message)
ij> SELECT ID_ITM, ITM_NAME, ITM_CODE
FROM ITEMS
WHERE ITM_CODE = COALESCE(NULL,ITM_CODE );
ERROR 42X01: Syntax error: Encountered "NULL" at line 3, column 31.
ij> SELECT ID_ITM, ITM_NAME, ITM_CODE
FROM ITEMS
WHERE ITM_CODE = COALESCE(NULLIF(1,1),ITM_CODE );
ID_ITM |ITM_NAME |ITM_CODE
------------------------------------------------------------------------------------------------
ERROR 38000: The exception 'java.lang.NullPointerException' was thrown while
evaluating an expression. SQLSTATE: XJ001: Java exception: ':
java.lang.NullPointerException'.
ij> SELECT ID_ITM, ITM_NAME, ITM_CODE
FROM ITEMS
WHERE ITM_CODE = COALESCE(CAST(NULLIF(1,1) AS BIGINT), ITM_CODE);
ID_ITM |ITM_NAME |ITM_CODE
------------------------------------------------------------------------------------------------
ERROR 38000: The exception 'java.lang.NullPointerException' was thrown while
evaluating an expression. SQLSTATE: XJ001: Java exception: ':
java.lang.NullPointerException'.
We have the same errors using 10.2.0.4 snapshot.
The coalesce function should accept NULL parameter.
Of course, My sample is very simple and I have n search criteria; so I don't
want to create 2^n SQL queries to deal with null or not null criterion.
I try to replace the coalesce function with a CASE statement but I encountered
the same problems...
So I don't actually have any workaround.
Regards,
Cédric
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