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

[Shang Yuanchun (Jira)]

Leonard Xu created FLINK-14882:
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             Summary: 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


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] 



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