what version of solr? what query parser are you using? what do all of your request params (including defaults) look like?
it's possible you are seeing the effects of edismax's "lowercaseOperators" param, which _should_ default to "false" in modern solr, but in very old versions it defaulted to "true" (inspite of what the docs at the time said)... https://lucene.apache.org/solr/guide/8_1/the-extended-dismax-query-parser.html https://issues.apache.org/jira/browse/SOLR-4646 : Date: Wed, 7 Aug 2019 19:32:02 -0400 : From: Steven White <swhite4...@gmail.com> : Reply-To: solr-user@lucene.apache.org : To: solr-user@lucene.apache.org : Subject: Lower case "or" is being treated as operator OR? : : Hi everyone, : : My schema is setup to index all words (no stop-words such as "or", "and", : etc.) are removed. My default operator is AND. But when I search for "one : or two" (without the quotes as this is not a phrase search) I'm getting : hits on documents that have either "one" or "two". It has the same effect : as if I searched for "one OR two". Any idea why? : : Where should I look to see what's causing this issue? What part of my : schema or request handler do you need to see? : : In case this helps. Searching for just "or" or "OR" (with or without : quests) gives me the same set of hits and ranking. The same is also true : for "and" or "AND". : : Thanks. : : Steven : -Hoss http://www.lucidworks.com/
