CODEWITHSUNDEEP
javalucene
dom
dom

Reputation: 763

Lucene 6.4.1 special character equal sign "=" not escaped by QueryParser.escape(...)

I'm working with lucene 6.4.1 and get an exception with an input which is containing an equals sign "=":

Caused by: INVALID_SYNTAX_CANNOT_PARSE: Syntax Error, cannot parse =:  
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.generateParseException(StandardSyntaxParser.java:1030)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.jj_consume_token(StandardSyntaxParser.java:912)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.Clause(StandardSyntaxParser.java:462)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.ModClause(StandardSyntaxParser.java:279)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.ConjQuery(StandardSyntaxParser.java:210)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.DisjQuery(StandardSyntaxParser.java:180)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.Query(StandardSyntaxParser.java:133)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.TopLevelQuery(StandardSyntaxParser.java:114)
at org.apache.lucene.queryparser.flexible.standard.parser.StandardSyntaxParser.parse(StandardSyntaxParser.java:62)
at org.apache.lucene.queryparser.flexible.core.QueryParserHelper.parse(QueryParserHelper.java:245)
at org.apache.lucene.queryparser.flexible.standard.StandardQueryParser.parse(StandardQueryParser.java:159)

I know there is a was to escape lucene special characters with

QueryParser.escape(...)

but why not the equal sign? I'm looking for a flexible way to not escape it by any self written code.

Upvotes: 2

Views: 1030

Answers (1)

femtoRgon
femtoRgon

Reputation: 33351

You are using the flexible StandardQueryParser (org.apache.lucene.queryparser.flexible.standard.StandardQueryParser), but are escaping using the classic QueryParser (org.apache.lucene.queryparser.classic.QueryParser). The equal sign is not part of the classic QueryParser syntax, and so is not escaped by QueryParser.escape

Upvotes: 2

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