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Posted to issues@hive.apache.org by "Miklos Gergely (JIRA)" <ji...@apache.org> on 2019/03/01 09:03:00 UTC
[jira] [Comment Edited] (HIVE-21231) HiveJoinAddNotNullRule support
for range predicates
[ https://issues.apache.org/jira/browse/HIVE-21231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781476#comment-16781476 ]
Miklos Gergely edited comment on HIVE-21231 at 3/1/19 9:02 AM:
---------------------------------------------------------------
[~vgarg] sure, this is far from the final version just a first draft. Wanted to see which q tests are failing :) Thanks for the advices, I'll write test for them.
was (Author: mgergely):
[~vgarg] sure, this is far from the final version just a first draft. Wanted to see which` q tests are failing :)
> HiveJoinAddNotNullRule support for range predicates
> ---------------------------------------------------
>
> Key: HIVE-21231
> URL: https://issues.apache.org/jira/browse/HIVE-21231
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Miklos Gergely
> Priority: Major
> Labels: newbie
> Attachments: HIVE-21231.01.patch
>
>
> For instance, given the following query:
> {code:sql}
> SELECT t0.col0, t0.col1
> FROM
> (
> SELECT col0, col1 FROM tab
> ) AS t0
> INNER JOIN
> (
> SELECT col0, col1 FROM tab
> ) AS t1
> ON t0.col0 < t1.col0 AND t0.col1 > t1.col1
> {code}
> we could still infer that col0 and col1 cannot be null for any of the inputs. Currently we do not.
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