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https://issues.apache.org/jira/browse/CALCITE-2970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17095599#comment-17095599
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Xiening Dai commented on CALCITE-2970:
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Hi [~zabetak], besides what [~julianhyde] mentioned previously, I can add two
points -
# Current transformRelBuilder() would support sub-classing, while
getRelFactory() would not.
# You can transform a RelBuilder in the process of building rel tree so you
could have nodes with different conventions - such as CassandraTableScan +
EnumerableFilter.
> 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: 17h 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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