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https://issues.apache.org/jira/browse/DRILL-961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033272#comment-14033272
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Chun Chang commented on DRILL-961:
----------------------------------
yes, it works now.
#Thu Jun 12 10:01:47 PDT 2014
git.commit.id.abbrev=4198a17
0: jdbc:drill:schema=dfs> select c_row, c_float8, cast(c_decimal18 as
decimal(18,9)), c_float8 / cast(c_decimal18 as decimal(18,9)) from data where
c_row = 7;
+------------+------------+------------+------------+
| c_row | c_float8 | EXPR$2 | EXPR$3 |
+------------+------------+------------+------------+
| 7 | 0.0 | -1.0E-8 | -0.0 |
+------------+------------+------------+------------+
> 0.0 divided by a very small number should be zero
> -------------------------------------------------
>
> Key: DRILL-961
> URL: https://issues.apache.org/jira/browse/DRILL-961
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Reporter: Chun Chang
> Assignee: Mehant Baid
>
> #Wed Jun 11 10:19:21 PDT 2014
> git.commit.id.abbrev=27a9c98
> In handling non-precise division, the following should be handled well:
> double / decimal18(18,9)
> 0 / -0.000000010
> This yields as -0 in postgres:
> foodmart=# select c_row, c_float8, cast(c_decimal18 as decimal(18,9)),
> c_float8 / cast(c_decimal18 as decimal(18,9)) from data where c_row = 7;
> c_row | c_float8 | c_decimal18 | ?column?
> -------+----------+--------------+----------
> 7 | 0 | -0.000000010 | -0
> Drill yields NaN:
> 0: jdbc:drill:schema=dfs> select c_row, c_float8, cast(c_decimal18 as
> decimal(18,9)), c_float8 / cast(c_decimal18 as decimal(18,9)) from data
> where c_row = 7;
> +------------+------------+------------+------------+
> | c_row | c_float8 | EXPR$2 | EXPR$3 |
> +------------+------------+------------+------------+
> | 7 | 0.0 | -1.0E-8 | NaN |
> +------------+------------+------------+------------+
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