[jira] [Commented] (CALCITE-3128) Joining two tables producing only NULLs will return 0 rows

["Danny Chan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16888558#comment-16888558 ] 

Danny Chan commented on CALCITE-3128:
-------------------------------------

[~julianhyde] Because you seem to have objections for this PR, can you take a look for this issue again ?

> Joining two tables producing only NULLs will return 0 rows
> ----------------------------------------------------------
>
>                 Key: CALCITE-3128
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3128
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.20.0
>            Reporter: Muhammad Gelbana
>            Assignee: Danny Chan
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> The following queries will return 0 rows while they're expected to ruturn rows with NULLs in them.
> {code:sql}
> SELECT *
> FROM (SELECT NULLIF(5, 5)) a, (SELECT NULLIF(5, 5)) b
> {code}
> {code:sql}
> SELECT *
> FROM (VALUES (NULLIF(5, 5)), (NULLIF(5, 5))) a, (VALUES (NULLIF(5, 5)), (NULLIF(5, 5))) b
> {code}



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