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Posted to issues@flink.apache.org by "Leonard Xu (Jira)" <ji...@apache.org> on 2019/11/21 03:54:00 UTC

[jira] [Updated] (FLINK-14882) Wrong null order when change flink default null order from NullCollation.LOW to NullCollation.FIRST

     [ https://issues.apache.org/jira/browse/FLINK-14882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Leonard Xu updated FLINK-14882:
-------------------------------
    Description: 
Flink's default null collation keeps Nulls last for DESC, nulls first for ASC which named

NullCollation.LOW.  But when I  change flink default null order from NullCollation.LOW to NullCollation.FIRST, the null order in SQL result do not change which not meet expected.

change file: org.apache.flink.table.planner.calcite.FlinkPlannerImpl.scala

 

cc [~danny0405] 

  was:
Flink's default null collation keeps Nulls last for DESC, nulls first for ASC which named

NullCollation.LOW.  But when I  change flink default null order from NullCollation.LOW to NullCollation.FIRST, the null order in SQL result do not which not meet expected.

change file: org.apache.flink.table.planner.calcite.FlinkPlannerImpl.scala

 

cc [~danny0405] 


> Wrong null order when change flink default null order from NullCollation.LOW to NullCollation.FIRST
> ---------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-14882
>                 URL: https://issues.apache.org/jira/browse/FLINK-14882
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.9.1
>            Reporter: Leonard Xu
>            Priority: Major
>
> Flink's default null collation keeps Nulls last for DESC, nulls first for ASC which named
> NullCollation.LOW.  But when I  change flink default null order from NullCollation.LOW to NullCollation.FIRST, the null order in SQL result do not change which not meet expected.
> change file: org.apache.flink.table.planner.calcite.FlinkPlannerImpl.scala
>  
> cc [~danny0405] 



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