Round error when casting float to decimal

[andygrove]

Describe the bug

Spark

scala> spark.sql("select cast(0.06+0.01 as decimal(18,2))").show
+------------------------------------+
|CAST((0.06 + 0.01) AS DECIMAL(18,2))|
+------------------------------------+
|                                0.07|
+------------------------------------+

DataFusion

❯ select cast(0.06+0.01 as decimal(18,2));
+-------------------------------+
| Float64(0.06) + Float64(0.01) |
+-------------------------------+
| 0.06                          |
+-------------------------------+

To Reproduce
See above

Expected behavior

Additional context
Discovered as part of #4024

[andygrove]

filed related issue in arrow-rs: apache/arrow-rs#2997

[tustvold]

Fixed by #4199

❯ select cast(0.06+0.01 as decimal(18,2));
+-------------------------------+
| Float64(0.06) + Float64(0.01) |
+-------------------------------+
| 0.07                          |
+-------------------------------+
1 row in set. Query took 0.008 seconds.