Chun Chang created DRILL-793:
--------------------------------
Summary: decimal arithmetic behavior
Key: DRILL-793
URL: https://issues.apache.org/jira/browse/DRILL-793
Project: Apache Drill
Issue Type: Bug
Components: Functions - Drill
Reporter: Chun Chang
Assignee: Mehant Baid
How do we decide what significant digits to use when mix different decimals in
arithmetic calculations? Current implementation is to use numerator as
reference, this might not be optimal. Here is an example:
drill:
0: jdbc:drill:schema=dfs> select cast('123456789' as decimal(9,0)) /
cast('12345678901234.56789123456789' as decimal(28,14)) from data limit 1;
+------------+
| EXPR$0 |
+------------+
| 0 |
+------------+
postgres:
foodmart=# select cast('123456789' as decimal(9,0)) /
cast('12345678901234.56789123456789' as decimal(28,14)) from data limit 1;
?column?
----------------------------
0.000009999999998999999999
(1 row)
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