将带有字符串数组的元组拆分为多个元组

Question

我有像

这样的元组

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

我想基于字符串数组拆分元组，以便最终结果是这样的

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

我怎样才能在猪身上做到这一点？

Answer 1

首先使用'['函数从输入中删除']'和REPLACE字符，然后将输出包装到bag和flatten中。

<强>输入

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

<强> 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;

<强>输出：

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