Oracle Number : Precision and scale

Oracle allows the scale to be negative.

If you specify a negative scale, Oracle Database rounds the actual data to the specified number of places to the left of the decimal point. For example, specifying (7,-2) means Oracle Database rounds to the nearest hundredths

The `java.math.BigDecimal` scale must be between 0 and the precision 18 (both inclusive).

It gives the following exception：

cause: org.apache.kafka.connect.errors.DataException: BigDecimal has mismatching scale value for given Decimal schema
    at org.apache.kafka.connect.data.Decimal.fromLogical(Decimal.java:68)
    at org.apache.kafka.connect.json.JsonConverter$1.toJson(JsonConverter.java:157)
    at org.apache.kafka.connect.json.JsonConverter.convertToJson(JsonConverter.java:575)
    at org.apache.kafka.connect.json.JsonConverter.convertToJson(JsonConverter.java:662)
    at org.apache.kafka.connect.json.JsonConverter.convertToJson(JsonConverter.java:662)
    at org.apache.kafka.connect.json.JsonConverter.convertToJsonWithEnvelope(JsonConverter.java:550)
    at org.apache.kafka.connect.json.JsonConverter.fromConnectData(JsonConverter.java:304)