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https://issues.apache.org/jira/browse/CALCITE-558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14288888#comment-14288888
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Vladimir Sitnikov commented on CALCITE-558:
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[~julianhyde], I am looking into all that stuff and I've a question: does
{{linq4j.AbstractNode.evaluate}} count as an interpreter?
> Add BINDABLE convention and make it the default convention for query root
> -------------------------------------------------------------------------
>
> Key: CALCITE-558
> URL: https://issues.apache.org/jira/browse/CALCITE-558
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> The default convention is currently ENUMERABLE, which means that to execute a
> query, and in particular to use the JDBC driver, RelNodes need to be able to
> convert themselves to code. This introduces a lot of dependencies that make
> CALCITE-466 difficult to solve.
> We propose to add a new convention that can be more easily implemented by a
> RelNode, using an interpreter or otherwise.
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