Zoltan Haindrich created HIVE-23090:
---------------------------------------
Summary: Introduce a model to describe sub-expression's stat state
Key: HIVE-23090
URL: https://issues.apache.org/jira/browse/HIVE-23090
Project: Hive
Issue Type: Improvement
Reporter: Zoltan Haindrich
Assignee: Zoltan Haindrich
In
[StatsRulesProcFactory|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java]
right now the computation is based on functions which return values of
numRows; with the extension that the called method may sometimes alter the
passed Statistics object - this makes the logic a bit trickier here and there -
having a real model for a subexpression could give natural benefits and may
help in fixing issues like: HIVE-22238, HIVE-23082
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
