Problems with Sequence involving a Union

[laurachiticariu]

The issue can be reproduced with this flow:
tutorial_flow.json.txt

There are several issues.

1. Running just Amount, or just RevenueOfDivision (the union) sometimes shows results from the previous run.
2. Running the RevenueByDivision sequence shows an exception. I think this is again something related to attribute names.

[laurachiticariu]

@JesusGuerrero Trying to reproduce with v 0.5.0.

I imported the flow in the description, and now get this error when running:

Recreating the extractor from scratch, here is the flow:
gh_68.json.txt

All nodes work fine with the exception of the final sequence RevDivAmount, which results in an exception:

[laurachiticariu]

@JesusGuerrero The problem is due to attribute names. Attribute names do not seem to propagate correctly.

In RevOfDiv1, the attribute name is Sequence_1 (even though the Node was renamed from Sequence_1 to RevOfDiv1):

RevOfDiv which is a union, also has the attribute Sequence_1, as can be seen from the results:

Now in RevDivAmount, the pattern uses <RevByDiv1.RevByDiv1> instead of <RevByDiv1.Sequence_1>. The correct behavior would be for the generated pattern to use <RevByDiv1.Sequence_1> instead.

This explains the AQL compiler error.

But, even if I change the attribute name in the sequence:

(<RevOfDiv.Sequence_1>)<Token>{0,15}(<Amount.Amount>)

The error persists:

op-dir/biadmin_elyraNLPCanvas__Export/RevDivAmount.aql' line 17, column 9: R (RevOfDiv) has no output column called 'RevOfDiv' (columns are [Sequence_1])\nIn '/app/Seer-Core/watson_nlp_demos/demos/SystemT/java/systemt-java-api-example/op-dir/biadmin_elyraNLPCanvas__Export/RevDivAmount.aql

There seems to be a problem with the semantic of the renamed attribute - I do not see Sequence_1 in line 634: