! can be used before a term for NOT, similar to - (minus).
On 6/9/05, Zhang, Lisheng <[EMAIL PROTECTED]> wrote: > Hi, > > Thanks for the info, that solved my problem, may > I ask one question further: what is the reason > why "!" must be escaped? > > I can see why "+ - * ? \ ~ :" must be escaped since > they have some usage in query formulation, is "!" > part of the query syntax? > > Best regards, Lisheng > > > -----Original Message----- > From: Richard Krenek [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 09, 2005 3:18 PM > To: java-user@lucene.apache.org > Subject: Re: Lucene 1.4.3 QueryParser cannot parse "great!" ? > > > Here is a list of special characters that must be excaped in a query. > > + - && || ! ( ) { } [ ] ^ " ~ * ? : \ > > Query q = QueryParser.parse("great\!", "all", new StandardAnalyzer()); > > > > On 6/9/05, Zhang, Lisheng <[EMAIL PROTECTED]> wrote: > > Hi, > > > > We are using lucene 1.4.3, we indexed a string > > > > Company picnic is great! > > > > by IndexWriter created with StandardAnalyzer, into > > a field called "all". I also confirmed StandardAnalyzer > > processed my input string as tokens: > > > > company > > picnic > > great > > > > as I expected. > > > > But when I try to create Query by QueryParser > > > > Query q = QueryParser.parse("great!", "all", new StandardAnalyzer()); > > > > I got the ParseException: > > > > ########################## > > Encountered "<EOF>" at line 1, column 7. > > Was expecting one of: > > "(" ... > > <QUOTED> ... > > <TERM> ... > > <PREFIXTERM> ... > > <WILDTERM> ... > > "[" ... > > "{" ... > > <NUMBER> ... > > ######################### > > > > Surely if I use "great" or some other special symbols > > at the end like "great-" or "great+", QueryParser is OK. > > > > I would expect QueryParser can process "great!" to take > > away "!" so this query is the same as "great"? Is this behavior > > expected or is a bug? > > > > Thanks very much for helps, > > > > Lisheng Zhang, Software engineer > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
