[jira] [Commented] (CALCITE-3285) EnumerableMergeJoin should support non-equi join conditions

["Vladimir Sitnikov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17006383#comment-17006383 ] 

Vladimir Sitnikov commented on CALCITE-3285:
--------------------------------------------

[~jinxing6042@126.com], [~hyuan] it looks like MergeJoin implementation is not symmetrical.

In other words, the resultset depends on the order of the inputs.

For instance, org.apache.calcite.runtime.EnumerablesTest#testMergeJoin4. If I swap join inputs, then the join suddenly produces 2 rows instead of 4.
I have not verified which one is better, but merge join should be symmetrical.

Can you please check that?

> EnumerableMergeJoin should support non-equi join conditions
> -----------------------------------------------------------
>
>                 Key: CALCITE-3285
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3285
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: Haisheng Yuan
>            Assignee: Jin Xing
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.22.0
>
>          Time Spent: 2h 50m
>  Remaining Estimate: 0h
>
> Calcite should be able to generate EnumerableMergeJoin with non-equi join conditions, as long as there are equi-join conditions.



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