Check schema type for bigint object

Author: JessieYee

database-commons/src/main/java/io/cdap/plugin/db/DBRecord.java

@@ -152,13 +152,10 @@ protected void setField(ResultSet resultSet, StructuredRecord.Builder recordBuil
     } else if (o instanceof BigDecimal) {
       recordBuilder.setDecimal(field.getName(), (BigDecimal) o);
     } else if (o instanceof BigInteger) {
-      if (sqlType == Types.BIGINT && (resultSet.getMetaData().isSigned(columnIndex) ||
-          resultSet.getMetaData().getPrecision(columnIndex) < 19)) {
-        //SQL BIGINT type is 64-bit long thus signed should be able to convert to long without losing precisions
-        // or UNSIGNED type is within the scope of signed long
+      Schema schema = field.getSchema();
+      if (schema.getType() == Schema.Type.LONG) {
         recordBuilder.set(field.getName(), ((BigInteger) o).longValueExact());
       } else {
-        // BigInteger won't have any fraction part and scale is 0
         recordBuilder.setDecimal(field.getName(), new BigDecimal((BigInteger) o, 0));
       }
     } else {