Hello everyone, I'm testing the use of proximity search operator (~) in Lucene. I noticed a strange behaviour when the terms in the text are not in the same order of the query. Here are some examples:
text: AA BB query: "AA BB"~0 result: true text: AA ZZ BB query: "AA BB"~0 result: false text: AA ZZ BB query: "AA BB"~1 result: true text: BB AA query: "AA BB"~0 why the result is false? Aren't BB AA contigous? result: false text: BB AA query: "AA BB"~1 result: false text: BB AA query: "AA BB"~2 why with proximity=2 the result is true?? result: true text: BB ZZ AA query: "AA BB"~2 result: false text: BB ZZ AA query: "A B"~3 why with proximity=3 the result is true?? result: true text: AA ZZ BB CC query; "AA BB CC"~0 result: false text: AA ZZ BB CC query; "AA BB CC"~1 result: true text: CC BB AA query; "AA BB CC"~3 result: false text: CC BB AA query; "AA BB CC"~4 result: true text: CC AA BB query; "AA BB CC"~2 result: false text: CC AA BB query; "AA BB CC"~3 result: true Does anyone know why Lucene behaves in that way?? Thanks, Eng. Stefano Coppi Information Systems Consultant IC Technology s.r.l. - Gruppo InfoCamere SCpA Via Bertolini, 37/C 70125 - Bari - Italy
