Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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3.6.1, 4.0-BETA
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None
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None
Description
For a query such as "cat dog OR (fox bat fish)" with &q.op=AND, the default query operator remains "OR" for the entire query. This is not documented behavior and rather surprising.
This happens because edismax only simulates the default operator by forcing "mm" (minMatch) to 100% for the top-level BooleanQuery alone, but only if there are NO explicit operators present.
One solution is for edismax to always set the default query operator when calling the classic Lucene query parser, or at least when q.op=AND.