[jira] [Created] (SPARK-27539) Inaccurate aggregate outputRows estimation with null value column

["peng bo (JIRA)" <ji...@apache.org>]

peng bo created SPARK-27539:
-------------------------------

             Summary: Inaccurate aggregate outputRows estimation with null value column
                 Key: SPARK-27539
                 URL: https://issues.apache.org/jira/browse/SPARK-27539
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: peng bo


This issue is follow up of [https://github.com/apache/spark/pull/24286]. As [~smilegator] pointed out that column with null value is inaccurate as well.
{code:java}
> select * from test;
2
NULL
1
spark-sql> desc extended test key;
col_name key
data_type int
comment NULL
min 1
max 2
num_nulls 1
distinct_count 2{code}
The distinct count should be distinct_count + 1 when the column contains null value.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org