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https://issues.apache.org/jira/browse/CALCITE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14194048#comment-14194048
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Julian Hyde commented on CALCITE-451:
-------------------------------------
Work in progress in
https://github.com/julianhyde/incubator-calcite/tree/calcite-451. Will probably
commit after package reorg CALCITE-296 is complete.
> Implement theta join, inner and outer, in enumerable convention
> ---------------------------------------------------------------
>
> Key: CALCITE-451
> URL: https://issues.apache.org/jira/browse/CALCITE-451
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> Implement theta join in enumerable convention. It must handle not just equi-,
> or equi-plus-theta (see CALCITE-371) but any join condition. It must also
> handle inner and all types of outer join.
> Performance may not be that good. Other join algorithms (e.g. hash join,
> nested loops doing range scans into a sorted map, or merge joins) can offer
> better alternatives for particular operators (e.g. {{BETWEEN}}).
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