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https://issues.apache.org/jira/browse/KYLIN-5279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17632023#comment-17632023
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ASF subversion and git services commented on KYLIN-5279:
--------------------------------------------------------
Commit 1fa73daee7fff8e912bcff9aaf859b66f5ebf94a in kylin's branch
refs/heads/kylin5 from zznlime
[ https://gitbox.apache.org/repos/asf?p=kylin.git;h=1fa73daee7 ]
KYLIN-5279 Add default null collation configuration with
CalciteExtrasProperties for Kylin5.0 (#2001)
* KYLIN-5279 Default null collation for Kylin5.0 sqls should be null-last for
ASC order and null-first for DESC order.
* KYLIN-5279 add a config for default null collation for Kylin5.0.
* reuse KylinConfigBase#getCalciteExtrasProperties for get default null
collation.
> Default null collation for Kylin5.0 sqls should be null-last for ASC order
> and null-first for DESC order.
> ---------------------------------------------------------------------------------------------------------
>
> Key: KYLIN-5279
> URL: https://issues.apache.org/jira/browse/KYLIN-5279
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Reporter: Zhenning Zhang
> Assignee: Zhenning Zhang
> Priority: Major
> Fix For: 5.0-alpha
>
> Attachments: image-2022-10-20-15-12-12-967.png
>
>
> according to pgsql:
> [https://www.postgresql.org/docs/current/queries-order.html]
> "By default, null values sort as if larger than any non-null value; that is,
> {{NULLS FIRST}} is the default for {{DESC}} order, and {{NULLS LAST}}
> otherwise."
> currently, the result is:
> !image-2022-10-20-15-12-12-967.png|width=1320,height=743!
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