[ http://issues.apache.org/jira/browse/DERBY-479?page=all ]
Mamta A. Satoor updated DERBY-479:
----------------------------------
Attachment: Derby479LinkageErrorReturnNullIfNulldiff021406.txt
The reason for this exception lies in the parsing phase where
MethodCallNode.addParams(Vector) tries to do some optimization. Rather than
putting SQLToJavaValueNode on top of JavaToSQLValueNode, it directly gets the
JavaValueNode. The comment for this shortcircuit in
MethodCallNode.addParams(Vector) says "In general, we want to avoid converting
the same value back and forth between the SQL and Java domains," But going
directly to java domain value causes type mismatch for a SQL function defined
with return null on null input and when that SQL function is used as an
argument to another SQL function. In order to generate the correct code for
such a SQL function, we need access to both SQL domain value and Java domain
value. In my patch, I have removed the optimization code from
MethodCallNode.addParams(Vector) so that now, we do create a SQLToJavaValueNode
on top of JavaToSQLValueNode. This change fixes the problem. I have attached
the patch for it to JIRA. Please send any comments you might have after the
review.
I have run derbyall suite on Windows XP with Sun jdk14 and there were no
problems.
svn stat
M java\engine\org\apache\derby\impl\sql\compile\ActivationClassBuilder.java
M java\engine\org\apache\derby\impl\sql\compile\MethodCallNode.java
M java\engine\org\apache\derby\impl\sql\compile\CursorNode.java
M
java\testing\org\apache\derbyTesting\functionTests\tests\lang\functions.sql
M java\testing\org\apache\derbyTesting\functionTests\master\functions.out
> Passing the return of a RETURN NULL ON NULL INPUT function to another
> function call throws linkage error.
> ----------------------------------------------------------------------------------------------------------
>
> Key: DERBY-479
> URL: http://issues.apache.org/jira/browse/DERBY-479
> Project: Derby
> Type: Bug
> Components: SQL
> Versions: 10.2.0.0
> Reporter: Daniel John Debrunner
> Assignee: Mamta A. Satoor
> Attachments: Derby479LinkageErrorReturnNullIfNulldiff021306.txt,
> Derby479LinkageErrorReturnNullIfNulldiff021406.txt
>
> Error in ij (RN_RADIANS is a function declared as returns null on null input)
> ij> VALUES CAST( CALL_COS(RN_RADIANS(90.0)) AS DECIMAL(3,2));
> ERROR XBCM1: Java linkage error thrown during load of generated class
> org.apache.derby.exe.ace5214067x0105x5e41x7a46xffff855452e375.
> ERROR XJ001: Java exception: '(class:
> org/apache/derby/exe/ace5214067x0105x5e41x
> 7a46xffff855452e375, method: e0 signature: ()Ljava/lang/Object;) Expecting to
> find double on stack: java.lang.VerifyError'.
> extract from derby.log
> 2005-07-28 16:23:43.836 GMT Thread[main,5,main] Wrote class
> org.apache.derby.exe
> .ace5214067x0105x5e41x7a46xffff855452e375 to file
> C:\_work\svn_pb\trunk\systest\
> out\functions\ace5214067x0105x5e41x7a46xffff855452e375.class. Please provide
> sup
> port with the file and the following exception information:
> java.lang.VerifyErro
> r: (class: org/apache/derby/exe/ace5214067x0105x5e41x7a46xffff855452e375,
> method
> : e0 signature: ()Ljava/lang/Object;) Expecting to find double on stack
> I will add a test case to lang/functions.sql commented with this bug number.
> Test cases
> that fail will be commented out.
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