[jira] [Assigned] (DRILL-6291) Wrong result for COUNT function and empty file (schemaless table)

["Hanumath Rao Maduri (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-6291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hanumath Rao Maduri reassigned DRILL-6291:
------------------------------------------

    Assignee: Hanumath Rao Maduri

> Wrong result for COUNT function and empty file (schemaless table)
> -----------------------------------------------------------------
>
>                 Key: DRILL-6291
>                 URL: https://issues.apache.org/jira/browse/DRILL-6291
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Drill
>    Affects Versions: 1.13.0
>            Reporter: Vitalii Diravka
>            Assignee: Hanumath Rao Maduri
>            Priority: Major
>             Fix For: Future
>
>
> The count function shouldn't return null result. For the 0 rows case it should always return 0.
> {code}
> 0: jdbc:drill:zk=local> select count(`last_name`) from dfs.`/tmp/empty_file.json`;
> +---------+
> | EXPR$0  |
> +---------+
> +---------+
> No rows selected (0.3 seconds)
> {code}
> The result should be the similar to:
> {code}
> 0: jdbc:drill:zk=local> select count(`non_existent_column`) from cp.`employee.json`;
> +---------+
> | EXPR$0  |
> +---------+
> | 0       |
> +---------+
> 1 row selected (0.274 seconds)
> {code}
> Note: empty_file.json is an empty file.



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