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https://issues.apache.org/jira/browse/CALCITE-6335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17944821#comment-17944821
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Mihai Budiu commented on CALCITE-6335:
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yes, plan comparisons will fail. but looking at plans is not a robust test
anyway, that should be done sparingly, and perhaps left for RelOptRulesTest.
but all optimization rules are supposed to preserve semantics
ideally we would run *all* optimization rules with *all* quidem tests and
compare the outputs
I will make you a bet that we will find hundreds of bugs this way
We can start with one rule, for "constant folding" PROJECT_REDUCE_EXPRESSIONS
> Quidem tests should allow specifying optimization passes to apply to programs
> -----------------------------------------------------------------------------
>
> Key: CALCITE-6335
> URL: https://issues.apache.org/jira/browse/CALCITE-6335
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.36.0
> Reporter: Mihai Budiu
> Assignee: Zhen Chen
> Priority: Minor
> Labels: pull-request-available
>
> This facility would make it much easier to test various optimization passes.
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