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https://issues.apache.org/jira/browse/CALCITE-6068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17778660#comment-17778660
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Benchao Li commented on CALCITE-6068:
-------------------------------------
FYI, it seems this is introduced in CALCITE-4173, and there is a discussion in
the PR at that time:
https://github.com/apache/calcite/pull/2124#discussion_r479918788
> Whitespaces are removed from filter values
> ------------------------------------------
>
> Key: CALCITE-6068
> URL: https://issues.apache.org/jira/browse/CALCITE-6068
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.35.0
> Reporter: Petr Masopust
> Priority: Major
>
> SqlImplementor.java has hardcoded "true" for trimming whitespaces in
> Context.toIn method
> ([https://github.com/apache/calcite/blob/c83ac69111fd9e75af5e3615af29a72284667a4a/core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java#L908]).
>
> This makes troubles for our customer who use values like "Value 1 " etc.
> (don't ask me why).
> E.g.
> val filter = relBuilder.`in`(
> opportunityId,
> relBuilder.literal("value 1 "),
> relBuilder.literal("value 2 ")
> )
> is translated to "id" IN ('value 1', 'value 2') WITHOUT spaces at the end.
>
> I don't know why is such trimming implemented but calcite should not touch
> user inputs. Please make this at least configurable because I don't know any
> workaround. Obvious one with OR and equalities is optimized to IN and trimmed
> too.
> Test reproducer is in [https://github.com/pmsgd/calcite5888] repo in AppTest
> as testCalcite6068.
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