Re: Can the default graph be defined as the union of all named graphs?

Wed, 29 Apr 2015 03:13:38 -0700 

On 28/04/15 22:34, Daniel Hernández wrote:

hi all,

I have a dataset that have millions of named graph and I want to
query a property path against the union of all. It is not practical
to list all named graphs with FROM clauses, because they are millions.
Thus, I wan't to know if it is possible to set fuseki to assume
that the default graph is the union of all named graphs.

Thanks,
Daniel


Yes (if TDB backed).
Either in the assembler for the TDB dataset, or "--set tdb:unionDefaultGraph=true" what starting Fuseki. 

https://jena.apache.org/documentation/tdb/configuration.html#query-of-the-union-of-named-graphs

Or query graph <urn:x-arq:UnionGraph>

        Andy

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