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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2020/03/02 01:44:00 UTC
[jira] [Updated] (SPARK-29701) Different answers when empty input
given in GROUPING SETS
[ https://issues.apache.org/jira/browse/SPARK-29701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon updated SPARK-29701:
---------------------------------
Priority: Critical (was: Blocker)
> Different answers when empty input given in GROUPING SETS
> ---------------------------------------------------------
>
> Key: SPARK-29701
> URL: https://issues.apache.org/jira/browse/SPARK-29701
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 3.0.0
> Reporter: Takeshi Yamamuro
> Priority: Critical
> Labels: correctness
>
> A query below with an empty input seems to have different answers between PgSQL and Spark;
> {code:java}
> postgres=# create table gstest_empty (a integer, b integer, v integer);
> CREATE TABLE
> postgres=# select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),());
> a | b | sum | count
> ---+---+-----+-------
> | | | 0
> (1 row)
> {code}
> {code:java}
> scala> sql("""select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),())""").show
> +---+---+------+--------+
> | a| b|sum(v)|count(1)|
> +---+---+------+--------+
> +---+---+------+--------+
> {code}
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