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From "Chun Chang (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (DRILL-1430) sum(cast(columns[0] as int)) fails if column contains empty value
Date Fri, 17 Feb 2017 22:59:44 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chun Chang closed DRILL-1430.
-----------------------------

> sum(cast(columns[0] as int)) fails if column contains empty value
> -----------------------------------------------------------------
>
>                 Key: DRILL-1430
>                 URL: https://issues.apache.org/jira/browse/DRILL-1430
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Data Types
>    Affects Versions: 0.6.0
>            Reporter: Chun Chang
>             Fix For: 0.6.0
>
>
> code base
> #Fri Sep 12 14:08:02 PDT 2014
> git.commit.id.abbrev=9e16466
> I have a simple tsv file that contains an empty row in one of the columns:
> [root@qa-node120 tmp]# hadoop fs -cat /user/root/mondrian/tmp.tbl
> 1|1
> 2|2
> |3
> 4|4
> 0: jdbc:drill:schema=dfs> select * from `tmp.tbl`;
> +------------+
> |  columns   |
> +------------+
> | ["1","1"]  |
> | ["2","2"]  |
> | ["","3"]   |
> | ["4","4"]  |
> +------------+
> 4 rows selected (0.183 seconds)
> 0: jdbc:drill:schema=dfs> select columns[0], columns[1] from `tmp.tbl`;
> +------------+------------+
> |   EXPR$0   |   EXPR$1   |
> +------------+------------+
> | 1          | 1          |
> | 2          | 2          |
> |            | 3          |
> | 4          | 4          |
> +------------+------------+
> 4 rows selected (0.217 seconds)
> sum over the column that is full works fine, but sum over the column that contains empty
row fails:
> 0: jdbc:drill:schema=dfs> select sum(cast(columns[1] as int)) from `tmp.tbl`;
> +------------+
> |   EXPR$0   |
> +------------+
> | 10         |
> +------------+
> 1 row selected (0.283 seconds)
> 0: jdbc:drill:schema=dfs> select sum(cast(columns[0] as int)) from `tmp.tbl`;
> Query failed: Failure while running fragment.  [a9d8771f-aeb3-4226-9623-fc2b635365f8]
> Error: exception while executing query: Failure while trying to get next result batch.
(state=,code=0)
> 0: jdbc:drill:schema=dfs>
> drillbit.log
> 11:44:19.450 [9d14d90c-128c-4549-b77f-9b0051bc3d5c:frag:0:0] DEBUG o.a.d.e.w.fragment.FragmentExecutor
- Error while initializing or executing fragment
> java.lang.NumberFormatException:
>         at org.apache.drill.exec.test.generated.ProjectorGen18.doEval(ProjectorTemplate.java:40)
~[na:na]
>         at org.apache.drill.exec.test.generated.ProjectorGen18.projectRecords(ProjectorTemplate.java:64)
~[na:na]



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