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https://issues.apache.org/jira/browse/FLINK-20509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245177#comment-17245177
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godfrey he commented on FLINK-20509:
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if we verify all plan with {{verifyPlan}} method, we must add parameter to
distinguish what plan we want to verify. If that, there is also a lot of tests
will be changed.
> Refactor verifyPlan method in TableTestBase
> -------------------------------------------
>
> Key: FLINK-20509
> URL: https://issues.apache.org/jira/browse/FLINK-20509
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: godfrey he
> Priority: Major
>
> Currently, we use {{verifyPlan}} method to verify the plan result for both
> {{RelNode}} plan and {{ExecNode}} plan, because their instances are the same.
> But once the implementation of {{RelNode}} and {{ExecNode}} are separated, we
> can't get {{ESTIMATED_COST}} and {{CHANGELOG_MODE}} on {{ExecNode}} plan. So
> in order to make those methods more clear, the {{verifyPlan}} method will be
> separated into two methods, {{verifyRelPlan}} for verifying the {{RelNode}}
> plan, and {{verifyExecPlan}} for verifying the {{ExecNode}} plan.
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