Julian Hyde created CALCITE-1024:
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Summary: When writing planner tests, be explicit that rule has no
effect
Key: CALCITE-1024
URL: https://issues.apache.org/jira/browse/CALCITE-1024
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Add method {{RelOptRulesTestBase.checkPlanUnchanged}} method, and also add a
{{boolean unchanged}} parameter to the underlying {{checkPlanning}} method. If
a planner test is supposed to have no effect, that is, if the before and after
plans are the same, then you must specify that flag.
This makes it easier to notice if a rule that is supposed to work has stopped
working. It also removes redundant plans from the reference file.
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