Explicit repetition of blank node in input does not work with "add:execute-snapshot:remove:execute"

[MJRinne]

It looks like a specific RDF operation mode prevents the input from having the same blank node explicitly in the input.

Steps to repeat:

1) Query (issue20.rq):

PREFIX : http://instans.org/

SELECT * WHERE { ?event a :EventObject ; :hasEventObjectSamplingTime ?time }

2) Data (issue20.ttl):

@prefix : http://instans.org/ . :1 a :EventObject . :1 :hasEventObjectSamplingTime "2012-03-05T13:32:28"^^xsd:dateTime .

3) Command line: $ instans -r issue20.rq --rdf-operations=add:execute-snapshot:remove:execute --input-blocks=issue20.ttl

What happens:

No output is generated.

What was expected to happen:

The ?event and ?time were expected to be matched like this: event,time _:1,2012-03-05T13:32:28

If the operation mode parameter: "--rdf-operations=add:execute-snapshot:remove:execute" is removed, i.e. using command line: $ instans -r issue20.rq --input-blocks=issue20.ttl

..the expected output is generated.

[eskonuutila]

The problem is in that the ttl input has two separate blocks each having one triple. These blocks are processed using --rdf-operations=add:execute-snapshot:remove:execute. This causes the two input triples never to be in RETE at the same time.