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https://issues.apache.org/jira/browse/CALCITE-6416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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xiong duan resolved CALCITE-6416.
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Resolution: Fixed
> Remove unnecessary SUBSTRING rewrite in SparkSqlDialect
> -------------------------------------------------------
>
> Key: CALCITE-6416
> URL: https://issues.apache.org/jira/browse/CALCITE-6416
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.37.0
> Reporter: xiong duan
> Assignee: xiong duan
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.38.0
>
>
> SparkSqlDialect have a unnecessary rewrite about SUBSTRING func.
> In CALCITE-3247, We handle the SUBSTRING rewrite in HiveSqlDialect.
> In CALCITE-3072, We handle the SUBSTRING rewrite in SparkSqlDialect.
> In CALCITE-5677, We refactor the SUBSTRING as the default behaviour and
> remove the SUBSTRING rewrite in HiveSqlDialect. This PR will remove the Spark.
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