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Posted to issues@flink.apache.org by "Leonard Xu (Jira)" <ji...@apache.org> on 2019/11/21 03:18:00 UTC
[jira] [Created] (FLINK-14882) Wrong null order when change flink
default null order from NullCollation.LOW to NullCollation.FIRST
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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