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https://issues.apache.org/jira/browse/SOLR-8812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220618#comment-15220618
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Jan Høydahl commented on SOLR-8812:
-----------------------------------
bq. I can make this not a blocker since we have a work-around
Isn't it premature to proclaim a generic workaround, at least without more test
coverage to prove so?
The majority of edismax users have not upgraded to 5.5.0 yet, and for many of
them, existing applications and existing queries will start producing wrong
results. If there is a generic workaround to add {{mm=0}} in solrconfig.xml to
get back the correct behavior, we can declare a workaround. But we cannot
assume it is acceptable for people to write custom logic to conditionally
change the request depending on how the user-entered query looks like.
> ExtendedDismaxQParser (edismax) ignores Boolean OR when q.op=AND
> ----------------------------------------------------------------
>
> Key: SOLR-8812
> URL: https://issues.apache.org/jira/browse/SOLR-8812
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 5.5
> Reporter: Ryan Steinberg
> Assignee: Erick Erickson
> Priority: Blocker
> Fix For: 6.0, 5.5.1
>
> Attachments: SOLR-8812.patch
>
>
> The edismax parser ignores Boolean OR in queries when q.op=AND. This behavior
> is new to Solr 5.5.0 and an unexpected major change.
> Example:
> "q": "id:12345 OR zzzzzzzzzz",
> "defType": "edismax",
> "q.op": "AND",
> where "12345" is a known document ID and "zzzzzzzzzz" is a string NOT present
> in my data
> Version 5.5.0 produces zero results:
> "rawquerystring": "id:12345 OR zzzzzzzzzz",
> "querystring": "id:12345 OR zzzzzzzzzz",
> "parsedquery": "(+((id:12345
> DisjunctionMaxQuery((text:zzzzzzzzzz)))~2))/no_coord",
> "parsedquery_toString": "+((id:12345 (text:zzzzzzzzzz))~2)",
> "explain": {},
> "QParser": "ExtendedDismaxQParser"
> Version 5.4.0 produces one result as expected
> "rawquerystring": "id:12345 OR zzzzzzzzzz",
> "querystring": "id:12345 OR zzzzzzzzzz",
> "parsedquery": "(+(id:12345
> DisjunctionMaxQuery((text:zzzzzzzzzz))))/no_coord",
> "parsedquery_toString": "+(id:12345 (text:zzzzzzzzzz))"
> "explain": {},
> "QParser": "ExtendedDismaxQParser"
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