Support for Decimal type (Arbitrary Precision Numbers)

Problem

The representation of Decimals and Floats are fundamentally different. Postgres supports the concept of Arbitrary Precision Numbers via the numeric/decimal type.

It would be useful for Prisma to provide a core data type Decimal to live alongside Float and Int in order to support arbitrary precision numbers.

Suggested solution

Since the javascript Number type does not support arbitrary precision numbers fields with this value could be types as javascript String types.

Alternatives

Arbitrary precision values can be stored in a String field, however this prevents filtering/sorting/aggregation. Values could also be stored as a Float, but this loses the arbitrary precision which is important in many applications. Values could also be stored as Int, with the decimal shift accounted for manually, but this does not support arbitrary levels of precision in the was a postgres decimal value does.

[pantharshit00]

Decimal support was released in the preview of native types: https://www.prisma.io/docs/concepts/components/preview-features/native-types/native-types-mappings#decimal

I think we never posted an update here so here we go.

Client maps any Decimal value to decimal.js object.

[timsuchanek]

As this is implemented, I’ll close this issue.