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Posted to issues@spark.apache.org by "Furcy Pin (JIRA)" <ji...@apache.org> on 2016/09/19 09:35:20 UTC
[jira] [Created] (SPARK-17592) SQL: CAST string as INT inconsistent
with Hive
Furcy Pin created SPARK-17592:
---------------------------------
Summary: SQL: CAST string as INT inconsistent with Hive
Key: SPARK-17592
URL: https://issues.apache.org/jira/browse/SPARK-17592
Project: Spark
Issue Type: Bug
Affects Versions: 2.0.0
Reporter: Furcy Pin
Hello,
there seem to be an inconsistency between Spark and Hive when casting a string into an Int.
With Hive:
{code}
select cast("0.4" as INT) ;
> 0
select cast("0.5" as INT) ;
> 0
select cast("0.6" as INT) ;
> 0
{code}
With Spark-SQL:
{code}
select cast("0.4" as INT) ;
> 0
select cast("0.5" as INT) ;
> 1
select cast("0.6" as INT) ;
> 1
{code}
Hive seems to perform a floor(string.toDouble), while Spark seems to perform a round(string.toDouble)
I'm not sure there is any ISO standard for this, mysql has the same behavior than Hive, while postgresql performs a string.toInt and throws an NumberFormatException
Personnally I think Hive is right, hence my posting this here.
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