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https://issues.apache.org/jira/browse/CALCITE-7934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18143941#comment-18143941
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Etienne Pelissier commented on CALCITE-7934:
--------------------------------------------

Hey [~asolimando], you're welcome!

The problem is indeed reproducible beyond VALUES. I'll provide an example in 
the PR.
Yes, it's an indexing problem, I have linked the tickets you mentioned.

I will open a PR today.

Thanks for your guidance!

> Aggregate uniqueness metadata uses incorrect column ordinals
> ------------------------------------------------------------
>
>                 Key: CALCITE-7934
>                 URL: https://issues.apache.org/jira/browse/CALCITE-7934
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Etienne Pelissier
>            Priority: Major
>
> Broken quidem test:
> {code:java}
> !set hep-rules "
> +CoreRules.AGGREGATE_PROJECT_MERGE,
> +CoreRules.AGGREGATE_REMOVE"
> select distinct count(*) filter (where col1) as s
> from (values
>     (true, 1),
>     (true, 2)) as t(col1, col2)
> group by col2;
> +---+
> | S |
> +---+
> | 1 |
> +---+
> (1 row){code}
> The result produced by Calcite contains two rows instead of one.



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