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Posted to issues@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/02/05 07:21:34 UTC
[jira] [Commented] (DRILL-2015) Casting numeric value that does not
fit in integer data type produces incorrect result
[ https://issues.apache.org/jira/browse/DRILL-2015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14306722#comment-14306722 ]
Victoria Markman commented on DRILL-2015:
-----------------------------------------
Example with the simple function:
{code}
0: jdbc:drill:schema=dfs> select * from tab;
+------------+
| a1 |
+------------+
| -3477884857818808320 |
| 0 |
| 0 |
| 4465148082249531392 |
| 4465148082249531392 |
+------------+
5 rows selected (0.057 seconds)
0: jdbc:drill:schema=dfs> select round(a1/13) from tab;
+------------+
| EXPR$0 |
+------------+
| -2147483648 |
| 0 |
| 0 |
| 2147483647 |
| 2147483647 |
+------------+
{code}
> Casting numeric value that does not fit in integer data type produces incorrect result
> --------------------------------------------------------------------------------------
>
> Key: DRILL-2015
> URL: https://issues.apache.org/jira/browse/DRILL-2015
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Data Types
> Affects Versions: 0.8.0
> Reporter: Victoria Markman
> Assignee: Daniel Barclay (Drill/MapR)
> Fix For: Future
>
>
> t1.json
> {code}
> { "a1": 1 , "b1" : 1}
> { "a1": 2 , "b1" : 1}
> { "a1": 2 , "b1" : 2}
> { "a1": 3 , "b1" : 2}
> { "a1": 5000147483647 , "b1" : 3}
> {code}
> We should throw an error, this is technically data corruption.
> {code}
> 0: jdbc:drill:schema=dfs> select cast(a1 as integer) from `t1.json`;
> +------------+
> | EXPR$0 |
> +------------+
> | 1 |
> | 2 |
> | 2 |
> | 3 |
> | 805551103 |
> +------------+
> 5 rows selected (0.074 seconds)
> {code}
> {code}
> 0: jdbc:drill:schema=dfs> select cast(2147483648 as integer) from `t1.json`;
> +------------+
> | EXPR$0 |
> +------------+
> | -2147483648 |
> | -2147483648 |
> | -2147483648 |
> | -2147483648 |
> | -2147483648 |
> +------------+
> 5 rows selected (0.076 seconds)
> {code}
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