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https://issues.apache.org/jira/browse/FLINK-14092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932074#comment-16932074
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Kurt Young commented on FLINK-14092:
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I think we should stick to FLINK-13656, I will close this one.
> Upgrade Calcite version to 1.21 for Flink SQL
> ---------------------------------------------
>
> Key: FLINK-14092
> URL: https://issues.apache.org/jira/browse/FLINK-14092
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Affects Versions: 1.9.0
> Reporter: Danny Chan
> Priority: Major
> Fix For: 1.10.0
>
>
> Calcite 1.21 has been released recently, we need to upgrade to version 1.21
> for these reasons:
> # Previously we have made some temp code to support full data types in sql
> parser, since CALCITE-3213 has been resolved, we can do some refactoring for
> these codes;
> # We also fixed some important bug for Join which bring in from Calcite 1.20
> join like expression promotion, such as CALCITE-3170, CALCITE-3171.
> # CALCITE-2302 has been resolved, there is possibility we support implicit
> type coercion for Flink now.
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