@Override
  public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
    if (!(x instanceof BigDecimal)) {
      setObject(parameterIndex, x, targetSqlType, 0);
    } else {
      setObject(parameterIndex, x, targetSqlType, ((BigDecimal) x).scale());
    }
  }
save the SQL parameters as (paramLoc,paramValue) pairs.
iotdb-client/jdbc/src/main/java/org/apache/iotdb/jdbc/IoTDBPreparedStatement.java