我是apachepig的新用户，我有以下数据

order=0012,1,23  
order=0013,2,34,0015,1,45  
order=0011,1,456
...

我试图从下面的记录中提取信息

0012,1,23
0013,2,34
0015,1,45
0011,1,456
...

下面是我尝试过的代码

a = LOAD 'a.txt' Using TextLoader() AS (line:chararray);  
b = FOREACH a GENERATE FLATTEN(REGEX_EXTRACT_ALL(line, 'order=((\\d+),(\\d+),(\\d+))+')) AS
(
    order_item:chararray,
    order_pid: chararray,
    order_qty: chararray,
    order_price: chararray
);

它不起作用。
另一种方法是“保存到包中”：

a = LOAD 'a.txt' Using TextLoader() AS (line:chararray);  
b = FOREACH a GENERATE FLATTEN(REGEX_EXTRACT_ALL(line, 'order=((\\d+),(\\d+),(\\d+))+')) AS
(
    B: bag { T: tuple(
    order_pid: chararray,
    order_qty: chararray,
    order_price: char array
    )}
);

还是不行。