在我的脚本中，我从多个文件中读取数据，并使用一个regex及其补码将记录划分为两个组/类。我期待两个相互排斥的类，但我没有发现当我数记录。。。因此，我添加了一个分割部分，以查找我的约束及其补码未涵盖的“其余”记录。结果（再次）不是预期的结果。。。我的剧本怎么了？谢谢你的帮助！
期望的“数学”：

input: 1464 records
 ouputs: 264 + 870 + ???_330__??

剧本：

A = load 'input/*' using PigStorage('\t','-tagPath') as (src:chararray, content:chararray);
Ac = foreach (GROUP A all) generate COUNT(A);

B = filter A by content MATCHES '(^\\b[BCDFMSTX].*\\b\\:\\s{1}.*)';
Bc = foreach (GROUP B all) generate COUNT(B);

Bnot = filter A by NOT content MATCHES '(^\\b[BCDFMSTX].*\\b\\:\\s{1}.*)';
Bcnot = foreach (GROUP Bnot all) generate COUNT(Bnot);

SPLIT A INTO SET1 IF (content MATCHES '(^\\b[BCDFMSTX].*\\b\\:\\s{1}.*)')
              , SET2 IF (NOT content MATCHES '(^\\b[BCDFMSTX].*\\b\\:\\s{1}.*)')
              , SETn OTHERWISE;

STORE SET1 into 'output/set1';
STORE SET2 into 'output/set2';
STORE SETn into 'output/setn';

结果是：

Input(s):
 Successfully read 1464 records (49024 bytes) from: "hdfs://localhost:9000/user/dag/input/*"

 Output(s):
 Successfully stored 264 records (25276 bytes) in: "hdfs://localhost:9000/user/dag/output/set1"
 Successfully stored 870 records (84190 bytes) in: "hdfs://localhost:9000/user/dag/output/set2"
 Successfully stored 0 records in: "hdfs://localhost:9000/user/dag/output/setn"