[infinispan-issues] [JBoss JIRA] (ISPN-7982) Ickle purely negative fulltext subqueries cause empty results

[Gustavo Fernandes (JIRA)]

Gustavo Fernandes created ISPN-7982:
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             Summary: Ickle purely negative fulltext subqueries cause empty results
                 Key: ISPN-7982
                 URL: https://issues.jboss.org/browse/ISPN-7982
             Project: Infinispan
          Issue Type: Bug
          Components: Embedded Querying
    Affects Versions: 9.0.0.Final
            Reporter: Gustavo Fernandes


When using parethesis in an Ickle full text predicates, it can generate subqueries that are pure negative, e.g.

{{from IspnEvent where (tags : ('tagA' and (not 'a0')))}}

In Lucene, the query 
{{+tags:taga +(-tags:a0)}}

is different from 
{{+tags:taga -tags:a0}}

The latter works as expected, but the former brings empty results since Lucene does no support purely negative subqueries. In order for the former query to work, it needs to add all documents as another term to the subquery, for e.g. {{+tags:taga +(*:* -tags:a0)}}.





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