Wrong result for ArithmeticExpr

[kangkaisen]

Describe the bug

mysql> select 3074062.5421333313 * (9562325.0921268463 / 3946 - 97281.800003051758 / 384);
+-----------------------------------------------------------------------------+
| 3074062.5421333313 * (9562325.0921268463 / 3946 - 97281.800003051758 / 384) |
+-----------------------------------------------------------------------------+
|                                     6670585822.007877058-.+/.+(*6640070909 |
+-----------------------------------------------------------------------------+
1 row in set (0.05 sec)

[imay]

It looks like that result string has dirty content

[chenhao7253886]

This bug has been fixed in master, it should be Decimal's bug and new Decimal has fixed it.

[kangkaisen]

@chenhao7253886 Hi, which PR fix this issue?

[imay]

@chenhao7253886 Hi, which PR fix this issue?

#727
this patch change our decimal implementation to another. This precision is lower than current one. And has no problem for this case.

And this bug is in the current implementation, we are trying to fix it.

[kangkaisen]

@imay OK. Thanks you.

[imay]

@kangkaisen

You can try #980 to see if this will fix your problem

[kangkaisen]

#980 has fixed this issue, Thanks!