Yeah, it's a surprise, isn't it? I'm afraid there isn't a good answer. http://wiki.apache.org/lucene-java/BooleanQuerySyntax
The "best practice" appears to be to require parens everywhere to force the evaluation order. Not very satisfying, but it does work 100%. -----Original Message----- From: Sonu SR [mailto:[EMAIL PROTECTED] Sent: Monday, July 30, 2007 8:49 AM To: java-user@lucene.apache.org Subject: Question regarding boolean query Hi, I am getting different results for the following queries. 1. ABST:"spring-elastic"^3 AND SPEC:"internal combustion"^2 OR ABST:"cylinder"^3 2. SPEC:"internal combustion"^2 AND ABST:"spring-elastic"^3 OR ABST:"cylinder"^3 I think the above two queries are similar and will give the same results. I want to know the order of boolean operators. Is there any grouping is applied when fields repeats in the query? By applying the queries to lucene QueryParser, I got the results as 1. +ABST:"spring elastic"^3.0 SPEC:"internal combustion"^2.0ABST:cylinder^ 3.0 2. +SPEC:"internal combustion"^2.0 ABST:"spring elastic"^3.0ABST:cylinder^ 3.0 I have set the QueryParser operator as 'AND'. I was confused by looking on the QueryParser output. Please give me a good explanation, how lucene handling the boolean queries. Thanks, Sonu --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
