GitHub user heary-cao opened a pull request:
https://github.com/apache/spark/pull/18069
Improve division and multiplication mixing process the data
## What changes were proposed in this pull request?
spark-sql> select (1234567890123456789012 / 12345678901234567890120) *
12345678901234567890120;
NULL
spark-sql> select (12345678901234567890 / 123) * 123;
NULL
when the length of the getText is greater than 19, The result is not what
we expected.
but mysql handle the value is ok.
mysql> select (1234567890123456789012 / 12345678901234567890120) *
12345678901234567890120;
+------------------------------------------------------------------------------+
| (1234567890123456789012 / 12345678901234567890120) *
12345678901234567890120 |
+------------------------------------------------------------------------------+
|
1234567890123456789012.0000 |
+------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql>
mysql> select (12345678901234567890 / 123) * 123;
+------------------------------------+
| (12345678901234567890 / 123) * 123 |
+------------------------------------+
| 12345678901234567890.0000 |
+------------------------------------+
1 row in set (0.00 sec)
## How was this patch tested?
Supplement the unit test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/heary-cao/spark slash_handle
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18069.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18069
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