Bug #2365: Unexpected result when executing an XQuery update - Saxon - Saxonica Developer Community

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Bug #2365

closed

Unexpected result when executing an XQuery update

Added by Radu Pisoi about 9 years ago. Updated over 8 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Michael Kay

Category:

XQuery Update

Sprint/Milestone:

9.6.0.6

Start date:

2015-04-28

Due date:

% Done:

100%

Estimated time:

Legacy ID:

Applies to branch:

9.6

Fix Committed on Branch:

9.6

Fixed in Maintenance Release:

9.6.0.6

Platforms:

Description

I think that the result of the next XQuery Update transformation is wrong.

test.xq

xquery version "3.0";

declare variable $toInsert as node()+ := 
  <container>TO-INSERT<to-insert/></container>;

insert nodes $toInsert//node()
  as first into doc('insert.xml')//a

insert.xml

<?xml version="1.0" encoding="UTF-8"?>
<a>text</a>

I suppose the correct result should be:

<a>TO-INSERT<to-insert/>text</a>

but is:

<?xml version="1.0" encoding="UTF-8"?>
<a>TO-INSERTtext<to-insert/>
</a>

However, if the input XML document is:

<?xml version="1.0" encoding="UTF-8"?>
<a><child>text</child></a>

then the result is the expected one:


<?xml version="1.0" encoding="UTF-8"?>
<a>TO-INSERT<to-insert/><child>text</child></a>

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Updated by Michael Kay about 9 years ago

Category set to XQuery Update
Assignee set to Michael Kay
Priority changed from Low to Normal

Not doing well on this so far. My first attempt to reproduce it under 9.6 fails

java.lang.ClassCastException: net.sf.saxon.s9api.XdmEmptySequence cannot be cast to net.sf.saxon.s9api.XdmItem

at net.sf.saxon.s9api.XQueryEvaluator.getContextItem(XQueryEvaluator.java:157)

at net.sf.saxon.Query.runUpdate(Query.java:944)

at net.sf.saxon.Query.doQuery(Query.java:437)

at net.sf.saxon.Query.main(Query.java:111)

and under 9.7 I get

Error on line 7 of test.xq:

XUDY0027: An empty sequence is not allowed as the value of second operand of insert expression

Havne't actually done much with XQuery Update for a while now...

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Updated by Michael Kay about 9 years ago

Status changed from New to Resolved

The primary bug is exactly this test case: when doing "insert first", and the existing content is a single text node, and the new content is a sequence of more than one node STARTING with a text node, the existing text is merged with that first text node to be inserted. The test should be that the sequence to be inserted ENDS with a text node. The converse case, for "insert last" is also wrong in the other direction.

While running this I hit a couple of secondary problems trying to run an XQuery Update from the command line when there is no context item (that is, no -s option). I'm patching these at the same time.

Fixed in the 9.6 and 9.7 branches.

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