Wrong unconvert for Decimal

[DontStopMeNow]

There is a problem with unconverting Decimal. str(value) makes a float-like string that is cause of No operation equals between Decimal(19, 2) and Float64 error.

@staticmethod
    def unconvert(value: Decimal) -> bytes:
        return str(value).encode()

So, we made a monkey patch.

from aiochclient.types import Decimal, PY_TYPES_MAPPING

def unconvert_patch(value: Decimal) -> bytes:
    return f"toDecimal64('{value}', {abs(value.as_tuple().exponent)})".encode()

PY_TYPES_MAPPING[Decimal] = unconvert_patch

It had been working until the cython implementation was used inside docker =(
We are not good at cython, therefore there are no monkey patch for it or a pull request for the whole problem.

[maximdanilchenko]

@DontStopMeNow hi! Sorry for such late response.
Can you please give more detailed example? Table structure and how you insert and fetch this data. Because I can't reproduce it by myself.