[
https://issues.apache.org/jira/browse/HIVE-8592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xuefu Zhang resolved HIVE-8592.
-------------------------------
Resolution: Duplicate
Dupe of HIVE-8559.
> 0 values convert to null if casting to or inserting to Hive DECIMAL where
> precision and scale are the same
> ----------------------------------------------------------------------------------------------------------
>
> Key: HIVE-8592
> URL: https://issues.apache.org/jira/browse/HIVE-8592
> Project: Hive
> Issue Type: Bug
> Components: Database/Schema, SQL
> Affects Versions: 0.13.0
> Environment: Running Apache Hive version 0.13.0 using HortonWorks
> 2.1.2.1 with hadoop version 2.4.0.2.1.2.1-471, on Linux operating system
> centos5 (also occurs on centos6)
> Reporter: Aidan Semple
> Fix For: 0.13.0
>
>
> I am trying to load zero values into Hive Decimal fields into a Hive table
> where the precision and scale are defined as the same e.g. DECIMAL(1,1) or
> DECIMAL(3,3) etc...
> However every time I run a hive ql insert statement to do this containing
> zero values or run a LOAD DATA command to load a text file of data containing
> zero values to these columns / fields, on performing a query on the table,
> these zero values are displayed and treated as NULL values.
> On further investigation, I was able to narrow the problem down to doing
> simple selects with casts. See example and output from Hive below. So
> attempting to do a cast for 0 or 0.0 or '.0' to DECIMAL(1,1) NULL is returned
> instead of 0. This is the same for precisions 1-38 where the scale is also
> the same
> If there is a work around for this then please let me know. Thanks!
> hive> select cast('.0' as DECIMAL(1,1)), cast('0.0' as DECIMAL(1,1)),
> cast('0' as DECIMAL(1,1)), cast(0 as DECIMAL(1,1)), cast(0.0 as DECIMAL(1,1));
> Query ID = xxxxxxx_20141024140000_e4dfdcc1-e4ad-4f84-bd48-198e29fd3757
> Total jobs = 1
> Launching Job 1 out of 1
> Number of reduce tasks is set to 0 since there's no reduce operator
> Starting Job = job_1413470329106_0052, Tracking URL =
> http://hdp8:8088/proxy/application_1413470329106_0052/
> Kill Command = /usr/lib/hadoop/bin/hadoop job -kill job_1413470329106_0052
> Hadoop job information for Stage-1: number of mappers: 1; number of reducers: > 0
> 2014-10-24 14:01:10,256 Stage-1 map = 0%, reduce = 0%
> 2014-10-24 14:01:27,644 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 6.51
> sec
> MapReduce Total cumulative CPU time: 6 seconds 510 msec
> Ended Job = job_1413470329106_0052
> MapReduce Jobs Launched:
> Job 0: Map: 1 Cumulative CPU: 6.51 sec HDFS Read: 269 HDFS Write: 15
> SUCCESS
> Total MapReduce CPU Time Spent: 6 seconds 510 msec
> OK
> NULL NULL NULL NULL NULL
> Time taken: 36.281 seconds, Fetched: 1 row(s)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
