Apache pig 使用字符串数组将元组拆分为多个元组

我有一组元组，比如

A = 
(1, ["Football","Baseball"])
(2, ["Swimming","Baseball"])

我想根据字符串数组拆分元组，以便最终结果如下

(1, "Football")
(1, "Baseball")
(2, "Swimming")
(2, "Baseball")

---

如何在pig中执行此操作？

首先使用

REPLACE

功能从输入中删除

'['

和

']

字符，然后将输出包装到

包中

并将其展平

输入

1,["Football","Baseball"]
2,["Swimming","Baseball"]

PigScript:

A = LOAD 'input' USING PigStorage(',') AS (f1:int,f2:chararray,f3:chararray);
B = FOREACH A GENERATE f1,FLATTEN(TOBAG(REPLACE(f2,'[\\[\\]]',''),REPLACE(f3,'[\\[\\]]','')));
DUMP B;

(1,"Football")
(1,"Baseball")
(2,"Swimming")
(2,"Baseball")

输出：

A = LOAD 'input' USING PigStorage(',') AS (f1:int,f2:chararray,f3:chararray);
B = FOREACH A GENERATE f1,FLATTEN(TOBAG(REPLACE(f2,'[\\[\\]]',''),REPLACE(f3,'[\\[\\]]','')));
DUMP B;

(1,"Football")
(1,"Baseball")
(2,"Swimming")
(2,"Baseball")

---

@西瓦萨吉。实际上，没有3列，有2列，第一列是id，第二列是具有给定id的人喜欢的游戏数组。它不是字符串而是字符串数组。@user12331，Pig不支持数组类型的数据类型，上述输入将被视为简单字符串而不是字符串数组（Pig没有任何智能知道它是字符串数组）。当您应用“，”作为分隔符时，pig将把您的输入分隔为（col1=1，col2=[“Football”和col3=“ballball”]）。