Zero-trailing issue with domains (Numeric value does not fit in a System.Decimal)

I have a domain: CREATE DOMAIN amount_type AS numeric(34,18) It’s used in model like: [Column(TypeName = "amount_type")] decimal ; I have two problems:

1. inserting “0.1” gives back “0.100000000000000000” when reading
2. selecting, lets say, x=>new {mul = x.a * x.b} - gives “Numeric value does not fit in a System.Decimal” even if numbers are 0.1 (as an examples) because of number of trailing zeros

Recently it wasn’t the case (everything worked well) Can it be considered as a bug? Is there any workaround?

[YohDeadfall]

@alexk8 Sorry, I completely forgot about the issue. @roji Thanks for reminding me.

There is no bug, and the numeric handler behaves as expected. The problem hides in the type specified for columns. It’s numeric(34,18). What does this mean? This means that PostgreSQL will convert any value to the numeric with 18 digits after the dot. Therefore, you have 0.200000000000000000 in the database instead of 0.2.

I’m going to close the issue, but don’t hesitate to ask further questions.

[roji]

@YohDeadfall a reminder to try to look into this when you have some time…