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Posted to dev@lucene.apache.org by "Jack Conradson (JIRA)" <ji...@apache.org> on 2013/11/09 00:10:17 UTC
[jira] [Updated] (LUCENE-5336) Add a simple QueryParser to parse
human-entered queries.
[ https://issues.apache.org/jira/browse/LUCENE-5336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jack Conradson updated LUCENE-5336:
-----------------------------------
Attachment: LUCENE-5336.patch
I have attached a patch for this JIRA.
> Add a simple QueryParser to parse human-entered queries.
> --------------------------------------------------------
>
> Key: LUCENE-5336
> URL: https://issues.apache.org/jira/browse/LUCENE-5336
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Jack Conradson
> Attachments: LUCENE-5336.patch
>
>
> I would like to add a new simple QueryParser to Lucene that is designed to parse human-entered queries. This parser will operate on an entire entered query using a specified single field or a set of weighted fields (using term boost).
> All features/operations in this parser can be enabled or disabled depending on what is necessary for the user. A default operator may be specified as either 'MUST' representing 'and' or 'SHOULD' representing 'or.' The features/operations that this parser will include are the following:
> * AND specified as '+'
> * OR specified as '|'
> * NOT specified as '-'
> * PHRASE surrounded by double quotes
> * PREFIX specified as '*'
> * PRECEDENCE surrounded by '(' and ')'
> * WHITESPACE specified as ' ' '\n' '\r' and '\t' will cause the default operator to be used
> * ESCAPE specified as '\' will allow operators to be used in terms
> The key differences between this parser and other existing parsers will be the following:
> * No exceptions will be thrown, and errors in syntax will be ignored. The parser will do a best-effort interpretation of any query entered.
> * It uses minimal syntax to express queries. All available operators are single characters or pairs of single characters.
> * The parser is hand-written and in a single Java file making it easy to modify.
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