[jira] [Commented] (LUCENE-9367) Using a queryText which results in zero tokens causes a query to be built as null

["Alan Woodward (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-9367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101786#comment-17101786 ] 

Alan Woodward commented on LUCENE-9367:
---------------------------------------

`null` does seem like the wrong thing to do here - maybe we should be returning a MatchNoDocsQuery instead?

> Using a queryText which results in zero tokens causes a query to be built as null
> ---------------------------------------------------------------------------------
>
>                 Key: LUCENE-9367
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9367
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/search
>    Affects Versions: 7.2.1
>            Reporter: Tim Brier
>            Priority: Major
>
> If a queryText produces zero tokens after being processed by an Analyzer, when you try to build a Query with it the result is null.
>  
> The following code reproduces this bug:
> {code:java}
> public class LuceneBug {
>     public Query buildQuery() throws IOException {
>         Analyzer analyzer = CustomAnalyzer.builder()
>                 .withTokenizer(StandardTokenizerFactory.class)
>                 .addTokenFilter(StopFilterFactory.class)
>                 .build();
>         QueryBuilder queryBuilder = new QueryBuilder(analyzer);
>         String onlyStopWords = "the and it";
>         return queryBuilder.createPhraseQuery("AnyField", onlyStopWords);
>     }
> }
> {code}
>  



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