Feng Yuan created SPARK-19035:
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Summary: nested functions in case when statement will failed
Key: SPARK-19035
URL: https://issues.apache.org/jira/browse/SPARK-19035
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.2, 2.0.1, 2.0.0
Reporter: Feng Yuan
in this case:
select case when a=1 then 1 else concat(a,cast(rand() as string)) end
b,count(1) from yuanfeng1_a group by case when a=1 then 1 else
concat(a,cast(rand() as string)) end;
throw error:
Error in query: expression 'yuanfeng1_a.`a`' is neither present in the group
by, nor is it an aggregate function. Add to group by or wrap in first() (or
first_value) if you don't care which value you get.;;
Aggregate [CASE WHEN (a#2075 = 1) THEN cast(1 as string) ELSE
concat(cast(a#2075 as string), cast(rand(519367429988179997) as string)) END],
[CASE WHEN (a#2075 = 1) THEN cast(1 as string) ELSE concat(cast(a#2075 as
string), cast(rand(8090243936131101651) as string)) END AS b#2074]
+- MetastoreRelation default, yuanfeng1_a
spark-sql> select case when a=1 then 1 else concat(a,cast(rand() as string))
end b,count(1) from yuanfeng1_a group by case when a=1 then 1 else
concat(a,cast(rand() as string)) end;
16/12/30 15:05:55 INFO execution.SparkSqlParser: Parsing command: select case
when a=1 then 1 else concat(a,cast(rand() as string)) end b,count(1) from
yuanfeng1_a group by case when a=1 then 1 else concat(a,cast(rand() as string))
end
16/12/30 15:05:55 INFO parser.CatalystSqlParser: Parsing command: int
Error in query: expression 'yuanfeng1_a.`a`' is neither present in the group
by, nor is it an aggregate function. Add to group by or wrap in first() (or
first_value) if you don't care which value you get.;;
Aggregate [CASE WHEN (a#2077 = 1) THEN cast(1 as string) ELSE
concat(cast(a#2077 as string), cast(rand(-8113865568189974672) as string))
END], [CASE WHEN (a#2077 = 1) THEN cast(1 as string) ELSE concat(cast(a#2077 as
string), cast(rand(-824889479508647173) as string)) END AS b#2076, count(1) AS
count(1)#2079L]
+- MetastoreRelation default, yuanfeng1_a
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