[jira] [Commented] (JENA-1388) Lucene text search across multiple fields ("AND") yields no results

[Code Ferret (JIRA)]

    [ 
https://issues.apache.org/jira/browse/JENA-1388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240902#comment-16240902
 ] 

Code Ferret commented on JENA-1388:
-----------------------------------

 It seems worth pointing out that AND within the same subject can be 
accomplished:

{noformat}
    select ?s
    where {
        ?s text:query 'idx1:abc' .
        ?s text:query 'idx2:jkl' .
    }
{noformat}

However, using the expanded {{text:query}} results has its oddities:

{noformat}
    select ?s ?lit1 ?lit2
    where {
        (?s ?sc1 ?lit1) text:query 'idx1:abc' .
        (?s ?sc2 ?lit2) text:query 'idx2:jkl' .
    }
{noformat}

Leads to ?s bound as expected but only ?lit1 is bound.

This does not seem to be specifically related whether {{?s}} is bound or free 
when {{text:query}} is invoked, since:

{noformat}
    select ?s ?lit1 ?lit2
    where {
        (?s ?sc1 ?lit1) text:query 'idx1:abc' .
        (?s2 ?sc2 ?lit2) text:query 'idx2:jkl' .
    }
{noformat}

still leads to no binding for {{?lit2}}.

I'm not clear whether {{?lit2}} being unbound is expected or not. I was 
surprised that it does not seem to get bound.


> Lucene text search across multiple fields ("AND") yields no results
> -------------------------------------------------------------------
>
>                 Key: JENA-1388
>                 URL: https://issues.apache.org/jira/browse/JENA-1388
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Text
>    Affects Versions: Jena 3.4.0
>         Environment: CentOS 7.3, OpenJDK 64-Bit, v1.8.0_141-b16
>            Reporter: Vilnis Termanis (Iotic Labs)
>            Assignee: Osma Suominen
>              Labels: index, lucene, search
>         Attachments: config-fields.ttl, multi_field.ttl, multi_index.sparql
>
>
> Searching across two Lucene text indexed fields produces potentially 
> unexpected results. (The following assumes that the string supplied to each 
> field does match and is tied to the same uid/subject.)
> # A query across two fields with *OR* produces two equal rows
> # The same query but with *AND* produces no rows



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