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https://issues.apache.org/jira/browse/FLINK-41381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18141249#comment-18141249
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Sergey Nuyanzin commented on FLINK-41381:
-----------------------------------------

Merged as 
[ab1cb0b55fb6b0baa7a4896f71861c2d72239923|https://github.com/apache/flink/commit/ab1cb0b55fb6b0baa7a4896f71861c2d72239923]

> Use indexed seq for generation the digest of a Calc
> ---------------------------------------------------
>
>                 Key: FLINK-41381
>                 URL: https://issues.apache.org/jira/browse/FLINK-41381
>             Project: Flink
>          Issue Type: Technical Debt
>          Components: Table SQL / Planner
>            Reporter: Sergey Nuyanzin
>            Assignee: Sergey Nuyanzin
>            Priority: Major
>              Labels: pull-request-available
>
> This is a follow up for FLINK-41380
> the problem is that currently there is used scala's toList which is a 
> linkedlist however in digest there is position required which leads to 
> quadratic copmlexity



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