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https://issues.apache.org/jira/browse/CALCITE-7673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18100981#comment-18100981
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Julian Hyde commented on CALCITE-7673:
--------------------------------------

It would help if you clarified the summary. The current summary, "MongoDB 
Adapter can not support LIKE operator", is a negative. I was inferring that the 
"MongoDB adapter currently can not support LIKE operator but MongoDB can 
support LIKE, therefore we should push it down". The phrase "can not" is 
especially unhelpful.

> 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
>              Labels: pull-request-available
>             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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