presto-hive/src/main/java/io/prestosql/plugin/hive/HiveRecordCursor.java/HiveRecordCursor/getDouble
class HiveRecordCursor:    @Override
    public double getDouble(int field)
    {
        ColumnMapping columnMapping = columnMappings.get(field);
        if (columnMapping.getKind() == REGULAR) {
            return delegate.getDouble(columnMapping.getIndex());
        }
        return doubles[field];
    }