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https://issues.apache.org/jira/browse/FLINK-15944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther closed FLINK-15944.
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Resolution: Won't Fix
Since the old planner has been removed, I will close this issue now.
> Resolve the potential class conflict proplem when depend both planners
> ----------------------------------------------------------------------
>
> Key: FLINK-15944
> URL: https://issues.apache.org/jira/browse/FLINK-15944
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Legacy Planner, Table SQL / Planner
> Reporter: Jark Wu
> Priority: Minor
> Labels: auto-deprioritized-major
>
> FLINK-15935 raised the potential class conflict problem when the
> project/application depend old planner and blink planner at the same time.
> Currently, Calcite classes (fix Calcite bugs) and
> {{PlannerExpressionParserImpl}} have the same classpath and may lead to
> problems when they are different.
> Currently, we keep these classes in sync in both planners manually. However,
> it's not safe and error-prone. We should figure out a solution for this (we
> can't remove old planner in the near future).
> A viable solution is having a {{flink-table-planner-common}} module to keep
> the commonly used classes in both planner.
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