HI Jack
Thanks a lot for your explanation.
2013/10/21 Jack Krupansky <j...@basetechnology.com>
> Start with org.apache.solr.handler.**component.QueryComponent#**prepare
> which fetches the fq parameters and indirectly invokes the query parser(s):
>
> String[] fqs = req.getParams().getParams(**CommonParams.FQ);
> if (fqs!=null && fqs.length!=0) {
> List<Query> filters = rb.getFilters();
> // if filters already exists, make a copy instead of modifying the
> original
> filters = filters == null ? new ArrayList<Query>(fqs.length) : new
> ArrayList<Query>(filters);
> for (String fq : fqs) {
> if (fq != null && fq.trim().length()!=0) {
> QParser fqp = QParser.getParser(fq, null, req);
> filters.add(fqp.getQuery());
> }
> }
> // only set the filters if they are not empty otherwise
> // fq=&someotherParam= will trigger all docs filter for every request
> // if filter cache is disabled
> if (!filters.isEmpty()) {
> rb.setFilters( filters );
>
> Note that this line actually invokes the parser:
>
> filters.add(fqp.getQuery());
>
> Then in org.apache.lucene.search.**Query.QParser#getParser:
>
> QParserPlugin qplug = req.getCore().getQueryPlugin(**parserName);
> QParser parser = qplug.createParser(qstr, localParams, req.getParams(),
> req);
>
> And for the common case of the Lucene query parser, org.apache.solr.search.
> **LuceneQParserPlugin#**createParser:
>
> public QParser createParser(String qstr, SolrParams localParams,
> SolrParams params, SolrQueryRequest req) {
> return new LuceneQParser(qstr, localParams, params, req);
> }
>
> And then in org.apache.lucene.search.**Query.QParser#getQuery:
>
> public Query getQuery() throws SyntaxError {
> if (query==null) {
> query=parse();
>
> And then in org.apache.lucene.search.**Query.LuceneQParser#parse:
>
> lparser = new SolrQueryParser(this, defaultField);
>
> lparser.setDefaultOperator
> (QueryParsing.**getQueryParserDefaultOperator(**getReq().getSchema(),
> getParam(QueryParsing.OP)));
>
> return lparser.parse(qstr);
>
> And then in org.apache.solr.parser.**SolrQueryParserBase#parse:
>
> Query res = TopLevelQuery(null); // pass null so we can tell later if an
> explicit field was provided or not
>
> And then in org.apache.solr.parser.**QueryParser#TopLevelQuery, the
> parsing begins.
>
> And org.apache.solr.parser.**QueryParser.jj is the grammar for a basic
> Solr/Lucene query, and org.apache.solr.parser.**QueryParser.java is
> generated by JFlex, and a lot of the logic is in the base class of the
> generated class, org.apache.solr.parser.**SolrQueryParserBase.java.
>
> Good luck! Happy hunting!
>
> -- Jack Krupansky
>
> -----Original Message----- From: YouPeng Yang
> Sent: Monday, October 21, 2013 2:57 AM
> To: solr-user@lucene.apache.org
> Subject: Class name of parsing the fq clause
>
>
> Hi
> I search the solr with fq clause,which is like:
> fq=BEGINTIME:[2013-08-25T16:**00:00Z TO *] AND BUSID:(M30000 OR M90000)
>
>
> I am curious about the parsing process . I want to study it.
> What is the Java file name describes the parsing process of the fq
> clause.
>
>
> Thanks
>
> Regards.
>
