xpleaf opened a new pull request #1184: [CALCITE-3027] Support like query in Elasticsearch URL: https://github.com/apache/calcite/pull/1184 In Elasticsearch, fuzzy matching is implemented by wildcard query: ``` GET /company/_search { "query": { "constant_score": { "filter": { "wildcard":{ "name_text":"*Alle_" } } } } } ``` > The symbols % and _ in sql are equivalent to the symbols * and ? in es, respectively. So in this PR, I added a new QueryBuilder called WildcardQueryBuilder to support wildcard queries, then to achieve like query in sql. JIRA: https://issues.apache.org/jira/projects/CALCITE/issues/CALCITE-3027
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