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https://issues.apache.org/jira/browse/DRILL-2338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14340725#comment-14340725
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Ramana Inukonda Nagaraj commented on DRILL-2338:
------------------------------------------------
Happens for dec28 as well.
0: jdbc:drill:> create table decimal28_bug as select cast('1.2' as
decimal(28,2)) from cp.`employee.json` limit 1;
+------------+---------------------------+
| Fragment | Number of records written |
+------------+---------------------------+
| 0_0 | 1 |
+------------+---------------------------+
1 row selected (0.271 seconds)
0: jdbc:drill:> select * from decimal28_bug;
+------------+
| EXPR$0 |
+------------+
| 12000000.00 |
+------------+
1 row selected (0.063 seconds)
> DECIMAL 38 when stored as a required datatype results in wrong data
> -------------------------------------------------------------------
>
> Key: DRILL-2338
> URL: https://issues.apache.org/jira/browse/DRILL-2338
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Parquet
> Affects Versions: 0.8.0
> Reporter: Ramana Inukonda Nagaraj
> Assignee: Mehant Baid
>
> Writing out a decimal 38 column by casting a literal results in a different
> value being written out.
> {code}
> 0: jdbc:drill:> create table mehant_bug as select cast('1.2' as
> decimal(38,2)) from cp.`employee.json` limit 1;
> 0: jdbc:drill:> select * from mehant_bug;
> +------------+
> | EXPR$0 |
> +------------+
> | 12000000.00 |
> +------------+
> 1 row selected (0.08 seconds)
> {code}
> [root@perfnode167 impala_parquet]#
> parquet-tools-1.5.1-SNAPSHOT/parquet-schema ../mehant_bug/0_0_0.parquet
> message root {
> required fixed_len_byte_array(16) EXPR$0 (DECIMAL(38,2));
> }
> If the column is stored as optional we do not have this issue.
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