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https://issues.apache.org/jira/browse/SOLR-17959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Webb updated SOLR-17959:
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Description:
We were surprised by edismax's behaviour for pure-stopword queries, having
expected that these would return zero results. Its 'If a query consists of all
stopwords, such as "to be or not to be", then all words are required.'
behaviour is the opposite to what we want as we're using query-time stopwords
to prevent particular query terms matching, but there's no way to disable the
behaviour other than using dismax instead, which may have other impacts.
https://github.com/apache/solr/pull/3802 adds an alwaysStopwords option that
disables the default behaviour, enabling stopwords to be always ignored.
was:
We were surprised by edismax's behaviour for pure-stopword queries, having
expected that these would return zero results. Its 'If a query consists of all
stopwords, such as "to be or not to be", then all words are required.'
behaviour is the opposite to what we want as we're using query-time stopwords
to prevent particular query terms matching, but there's no way to disable the
behaviour other than using dismax instead, which may have other impacts.
https://github.com/apache/solr/pull/2488 adds an alwaysStopwords option that
disables the default behaviour, enabling stopwords to be always ignored.
> Add alwaysStopwords option to edismax
> -------------------------------------
>
> Key: SOLR-17959
> URL: https://issues.apache.org/jira/browse/SOLR-17959
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Reporter: Andy Webb
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We were surprised by edismax's behaviour for pure-stopword queries, having
> expected that these would return zero results. Its 'If a query consists of
> all stopwords, such as "to be or not to be", then all words are required.'
> behaviour is the opposite to what we want as we're using query-time stopwords
> to prevent particular query terms matching, but there's no way to disable the
> behaviour other than using dismax instead, which may have other impacts.
> https://github.com/apache/solr/pull/3802 adds an alwaysStopwords option that
> disables the default behaviour, enabling stopwords to be always ignored.
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