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https://issues.apache.org/jira/browse/SOLR-8812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220908#comment-15220908
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Jan Høydahl commented on SOLR-8812:
-----------------------------------
[~gpendleb] looks like you have a good command on the logic and interactions
here, so feel free to throw up a patch...
bq. IF (the query contains a boolean operator) AND (mm has not been explicitly
set) THEN (mm = 0%)
In my experience some users may set mm=100% while others achieved the same with
q.op=AND. Advising users to favor the use of only q.op to get boolean operators
working makes the distinction hard to explain.
I'm positive to applying a fix that focuses on getting the pure AND/OR 0%/100%
case fixed (if that could be achieved with your proposed method), and then
worry about other mm's combined with explicit operators later.
> 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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