Bugs item #2806488, was opened at 2009-06-15 11:37
Message generated for change (Tracker Item Submitted) made by johnvanschie
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Category: XML
Group: XML
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: John van Schie (johnvanschie)
Assigned to: Nobody/Anonymous (nobody)
Summary: Some XML attributes not selectable.
Initial Comment:
MonetDB/XQuery Feb2009-SP2, Fedora Core 10 x86_64, 64 bit OID's, RPM install.
We have a MonetDB server that contains a fairly large (678 docs) collection of
small documents. When selecting attributes from elements within the documents,
some strange behaviour is noticed. It can be explained best with an query.
----
let $tasks := pf:collection('c2_log.xml')//success/ta...@duration]
for $task in $tasks
(: tasks should always have a xid and duration attribute when successful :)
where count($task/@*) != 2
return element {$task/name()} {$task/@*, $task}
----
<task duration="49506"><task duration="49506" xid="3"/></task>,
<task duration="24503"><task duration="24503" xid="799"/></task>,
<task duration="1531"><task duration="1531" xid="822"/></task>,
<task duration="5724"><task duration="5724" xid="7971"/></task>,
<task duration="439"><task duration="439" xid="8591"/></task>,
<task duration="510"><task duration="510" xid="8592"/></task>,
<task duration="1351"><task duration="1351" xid="8600"/></task>,
<task duration="749"><task duration="749" xid="8602"/></task>,
<task duration="2100"><task duration="2100" xid="22742"/></task>,
----
Thus we select all tasks that do not have two attributes and we see tasks
elements that have their xid attribute missing. But if we print the whole task
element, the missing xid attribute magically re-appears.
When we run the same query on a single document of the collection, we see the
same strange behaviour. We are not able to reproduce this behaviour by
exporting a problematic document and shredding it.
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