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https://issues.apache.org/jira/browse/CALCITE-2970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17089171#comment-17089171
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Xiening Dai commented on CALCITE-2970:
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Hi [~julianhyde], I am not sure I understand. Do you mean
getRelBuilderTransform() is a lambda provided by conventions? How can we have
multiple ones co-existed? Also sub-classing RelBuilder may not be a good idea,
but it's been there for some time. MaxCompute, Flink and other adapters are
already doing that...
> Performance issue when enabling abstract converter for EnumerableConvention
> ---------------------------------------------------------------------------
>
> Key: CALCITE-2970
> URL: https://issues.apache.org/jira/browse/CALCITE-2970
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 13h 10m
> Remaining Estimate: 0h
>
> If we enable the use of abstract converter for {{EnumerableConvention}}, by
> making {{useAbstractConvertersForConversion}} return true,
> {{JDBCTest.testJoinManyWay}} will not complete.
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