无法将Flatten（TOBAG（*））转换为chararray

Question

当我尝试将以下数据拆分为两个分隔符，即|和:时，我遇到了一个问题，

数据：

1   | c1:11:33 | c2:12

234 | c1:21    | c2:22

33  | c1:31    | c2:32

345 | c1:41    | c2:42

猪脚本：

inpt = load '/home/hduser/test1' as (line:chararray);

splt = foreach inpt generate FLATTEN(STRSPLIT($0, '\\|')) ;

id_vals = foreach splt generate $0 as id, FLATTEN(TOBAG(*)) as value;

id_vals3 = foreach id_vals generate id, INDEXOF(value,':') as p, (tuple(chararray,int))STRSPLIT(value,':',2) as vals; 

错误：

2015-03-26 18:54:45,724 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1045:

<line 4, column 87> Could not infer the matching function for org.apache.pig.builtin.STRSPLIT as multiple or none of them fit. Please use an explicit cast.

问题在于 - STRSPLIT(value...，它需要一个chararray，但是会得到一个NULL类型。

请提出建议或替代方法来解决此问题。