Indexing on attribute issue

Question

Hi:
I have a container with large documents containing several documents with the following elements:
<g:Value concept="J_DEBTOR" value="AL"/>
I have an xquey with the following where clause:
where ($series/generic:SeriesKey/generic:Value[@concept=xs:string('J_DEBTOR') and @value=xs:string('PA')])
Without indexes defined, the query runs fine.
If I add the following index on the "concept" attribute:
addIndex "" concept edge-attribute-equality-string
all goes well and the query performs as expected.
However, as soon as I add a second index on the "value" attribute:
addIndex "" value edge-attribute-equality-string
the query no longer returns any results.
This works:
where generic:Value[@concept=xs:string('J_DEBTOR')])
and this works as well
where generic:Value[@concept=xs:string('J_DEBTOR') and @value=xs:string('PA')])
If I 'and' both attributes, the query no longer returns results. It works as soon as I drop one of the two indexes.
I'm running DBXML 2.3.8. Any suggestion?
thanks
Pascal

Answer 1

After further testing, rewriting the condition as:
where ($series/generic:SeriesKey/generic:Value/@concept='J_DEBTOR')
and ($series/generic:SeriesKey/generic:Value/@value='PA')
gets the query to work with both indexes.