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From "Mamta A. Satoor (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-479) Passing the return of a RETURN NULL ON NULL INPUT function to another function call throws linkage error.
Date Thu, 16 Feb 2006 18:59:10 GMT
     [ http://issues.apache.org/jira/browse/DERBY-479?page=all ]

Mamta A. Satoor updated DERBY-479:

    Attachment: Derby479LinkageErrorReturnNullIfNulldiff021606.txt

I have attached a patch (Derby479LinkageErrorReturnNullIfNulldiff021606.txt) which solves
the problem by leaving SQLToJavaValueNode wrapper on top of JavaToSQLValueNode in case of
a SQL function defined as RETURN NULL ON NULL INPUT. This is because, such a function requires
access to both SQL domain value and Java domain value. This is not required for SQL function
defined as CALLED ON NULL INPUT and hence we will continue to do the optimization for such
functions by removing the wrapper classes SQLToJavaValueNode
and JavaToSQLValueNode and going directly to java domain value. This happens in StaticMethodCallNode.bindExpression()

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\engine\org\apache\derby\impl\sql\compile\StaticMethodCallNode.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:
>     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)
> 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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