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[Qexo-general] Problem with Aggregate Functions
From: |
Sascha Opletal |
Subject: |
[Qexo-general] Problem with Aggregate Functions |
Date: |
Thu, 27 Nov 2003 15:07:56 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 |
Hi!
I hope somebody can help me with this problem:
The data is:
<a>
<b c="1">1</b>
<b c="2">2</b>
<b c="1">1</b>
</a>
I want to sum up the text fields AND/OR the values of the "c"-Attributes.
I tried with kawa 1.7:
sum(for $a in doc("data2.xml")/a/b
return $a/text())
and
sum(for $a in doc("data2.xml")/a/b
return $a/@c)
They dont work and give me:
Invalid parameter, was: null
java.lang.ClassCastException
at gnu.kawa.functions.AddOp.apply2(AddOp.java:32)
at gnu.kawa.functions.AddOp.applyN(AddOp.java:73)
at gnu.kawa.functions.AddOp.applyN(AddOp.java:88)
at gnu.mapping.ProcedureN.apply2(ProcedureN.java:37)
at gnu.xquery.util.Reduce.combine(Reduce.java:26)
at gnu.xquery.util.Reduce.apply1(Reduce.java:42)
at gnu.mapping.Procedure.apply(Procedure.java:111)
at gnu.mapping.CallContext.runUntilDone(CallContext.java:258)
at gnu.expr.ModuleExp.evalModule(ModuleExp.java:188)
at kawa.Shell.run(Shell.java:232)
at kawa.standard.load.loadSource(load.java:162)
at kawa.standard.load.apply(load.java:275)
at kawa.Shell.runFile(Shell.java:295)
at kawa.repl.processArgs(repl.java:231)
at kawa.repl.main(repl.java:593)
What am i doing wrong?
- [Qexo-general] Problem with Aggregate Functions,
Sascha Opletal <=