The issue occurs when the subquery_cache is enabled.
When there is a cache miss the division was leading to a value with scale 9.
In the case of cache hit the value returned was of scale 9 and due to the different
values for the scales the where condition evaluated to FALSE, hence the output
was incomplete.

To fix this problem we need to round up the decimal to the limit mentioned in
Item::decimals. This would make sure the values are compared with the same
scale.