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https://issues.apache.org/jira/browse/CALCITE-7673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18099600#comment-18099600
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Yu Xu commented on CALCITE-7673:
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Apologies, I may have phrased that unclearly.
My initial plan was indeed to "push down" execution to the MongoDB engine—for
instance, mapping `LIKE` to the `$regex` expression and `=` to `$eq`. Can refer
to this documentation for the corresponding operations:
[https://www.mongodb.com/docs/manual/reference/operator/query/regex/#mongodb-query-op.-regex]
This is similar to how we currently support other operators in the MongoDB
adapter—such as the support for `LESS_THAN` and `IS_NULL` in `MongoFilter`.
> MongoDB Adapter can not support LIKE operator
> ---------------------------------------------
>
> Key: CALCITE-7673
> URL: https://issues.apache.org/jira/browse/CALCITE-7673
> Project: Calcite
> Issue Type: Improvement
> Components: mongodb-adapter
> Affects Versions: 1.42.0
> Reporter: Yu Xu
> Assignee: Yu Xu
> Priority: Major
> Fix For: 1.43.0
>
>
> Currently MongoDB Adapter not support LIKE operator.
> sql:
> {code:java}
> select state, city from zips where state like 'A%' order by state;{code}
> would error out:
> {code:java}
> java.lang.AssertionError: cannot translate LIKE(CAST(ITEM($0,
> 'city')):VARCHAR(20), 'A%') {code}
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