[SOLR-8812] ExtendedDismaxQParser (edismax) ignores Boolean OR when q.op=AND and mm is not explicitly set

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.5
• Fix Version/s: 5.5.2, 5.6, 6.0.2, 6.1, 7.0
• Component/s: query parsers
• Assignee: Steven Rowe
• Reporter: Ryan Steinberg
• Created: 09/Mar/16 18:30
• Updated: 30/Mar/18 00:47
• Resolved: 10/Jun/16 07:17

Description

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"

Issue Links

• is duplicated by: SOLR-8853 edismax - Ignores OR in between terms.
• is duplicated by: SOLR-8796 edixmax ignores OR operator with q.op=AND
• is related to: SOLR-12165 Ref Guide: DisMax default mm param value is improperly documented as 100%
• is related to: SOLR-2649 MM ignored in edismax queries with operators
• relates to: SOLR-9174 After Solr 5.5, mm parameter doesn't work properly