Hi,

I recently upgraded to BaseX 6.1. I now receive an error when running a query that run without complications in BaseX 6.0

The offending query has this prolog:

declare namespace libx='http://libx.org/xml/libx2';
declare namespace atom='http://www.w3.org/2005/Atom';
declare variable $metadata as xs:anyAtomicType := doc('libx2_meta')/metadata;
declare variable $feed     as xs:anyAtomicType := doc('libx2_feed')/feed;

which results in

declare variable $metadata as xs:anyAtomicType := doc('libx2_meta')/metadata;

^

javax.xml.xquery.XQQueryException: Stopped at line 3, column 48:

[XQST0049] Duplicate definition of $metadata as xs:anyAtomicType.

at org.basex.api.xqj.BXQDynamicContext.execute(BXQDynamicContext.java:251)

at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54)

at org.libx.libappdatabase.Query.main(Query.java:100)

Simply exchanging BaseX61.jar with BaseX6.jar makes this query work as expected. I note that if I switch lines 3 and 4 (so that the 'declare variable $feed' appears first), the error is flagged on this line.

The query runs fine using the command-client in both BaseX 6 and 6.1

I'm using org.basex.api.xqj.BXQDataSource, following by prepareExpression, followed by executeQuery. This query has no external variables.

Another point of information: out of curiosity, I printed information about the prepared expression after prepareExpression like so:

System.out.println("external vars: " + Arrays.asList(pe.getAllExternalVariables()));

System.out.println("unbound vars: " + Arrays.asList(pe.getAllUnboundExternalVariables()));

this shows 'metadata' and 'feed' as external variables:

external vars: [metadata, feed]

unbound vars: []

Why are 'metadata' listed as external, even though they are not declared as such?

I would appreciate any insight. If the problem is mysterious, I can prepare a self-contained test case or aid in debugging.

Thanks.

- Godmar

[*] http://top.cs.vt.edu/~gback/bx/get_connected_tree.xq