It works when I specify the UnionGraph in the query, but when using sdbquery it 
is not clear how to set SDB.unionDefaultGraph to true.

I tried the following approaches, but they did not work:
sdbquery --query=query1.rq --set SDB.unionDefaultGraph=true
(got no result)

sdbquery --query=query1.rq --set unionDefaultGraph=true
(got no result)

sdbquery --query=query1.rq --base=<urn:x-arq:UnionGraph>
(got syntax error)



On Feb 10, 2013, at 5:11 PM, Andy Seaborne wrote:

> or set the context symbol to enable the query patterns on the default
> graph match against the union of the named graphs.
> 
> http://jena.apache.org/documentation/sdb/configuration.html#current-options
> 
>       Andy

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