DynamoDB only supports precision up to 38 digits

[tekener]

When trying to persist an BigDecimal with more then 38 digits after the "." dynamodb is throwing an error. I also thought who is doing something like that but in our existing test code was a BigDecimal initialisation not with a string but with an double new BigDecimal(13.2) what causes the the more the 38 digits.

I would suggest to round in that case the decimal value like this:

  private static AttributeValue toAttributeValue(NumericNode numericNode) {
    if (numericNode.decimalValue() != null && numericNode.decimalValue().precision() > 38) {
      return AttributeValue.builder().n(numericNode.decimalValue().round(new MathContext(38, RoundingMode.CEILING)).toString()).build();
    }
    return AttributeValue.builder().n(numericNode.asText()).build();
  }