我想在元组中搜索字符串“15200”（不带引号）。因此，对于以下输入：

15200
15200,4000
4000,15200
4000,15200,4025
152000
152000,4000
4000,152000
4000,152000,4025
115200
115200,4000
4000,115200
4000,115200,4025

输出应为：

15200,15200
15200,4000,15200
4000,15200,15200
4000,15200,4025,15200
152000,-1
152000,4000,-1
4000,152000,-1
4000,152000,4025,-1
115200,-1
115200,4000,-1
4000,115200,-1
4000,115200,4025,-1

我的Pig代码如下：

A = LOAD '/user/test'  USING PigStorage()  AS (logic:chararray);
B = FOREACH A GENERATE
logic,
((logic matches '(^|,)15200($|,)')? '15200' :'-1') AS expt;

但当我甩了b，我得到：

(15200,15200)
(15200,4000,-1)
(4000,15200,-1)
(4000,15200,4025,-1)
(152000,-1)
(152000,4000,-1)
(4000,152000,-1)
(4000,152000,4025,-1)
(115200,-1)
(115200,4000,-1)
(4000,115200,-1)
(4000,115200,4025,-1)