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https://issues.apache.org/jira/browse/CALCITE-7244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18032850#comment-18032850
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Mihai Budiu commented on CALCITE-7244:
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That code has been there since 2012, and it was authored by [~julianhyde].
There seems to be no way to use strict = false.
Perhaps a solution is to run the query through a visitor and wrap every
RexLiteral of type CHAR into a CAST(x as VARCHAR).
> Support for VARCHAR RexLiteral
> ------------------------------
>
> Key: CALCITE-7244
> URL: https://issues.apache.org/jira/browse/CALCITE-7244
> Project: Calcite
> Issue Type: Wish
> Reporter: Steve Carlin
> Priority: Major
>
> Oh, the powers that be:
> I would be oh so happy if we can remove this line of code:
> [https://github.com/apache/calcite/blob/main/core/src/main/java/org/apache/calcite/rex/RexLiteral.java#L381|https://github.com/apache/calcite/blob/main/core/src/main/java/org/apache/calcite/rex/RexLiteral.java#L374]
> ...or at least allow a character RexLiteral to be created with type VARCHAR
> You see, when I do a CTAS statement with a "select 'hello'", it creates a
> STRING datatype, not a CHAR datatype in my database. Since I currently can't
> create a RexLiteral VARCHAR, I have to introduce a CAST around the literal,
> and I can't do this until RelNode/RexNode time. Even worse, when I have a
> Values RelNode, I have to create a Project on top of the Values with a cast.
> Please, oh please, take this into consideration and allow this. It would
> make my code a lot simpler.
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