这看起来像是一个可以使用cross的用例。裁判：http://pig.apache.org/docs/r0.7.0/piglatin_ref2.html#cross
这可能不是一个最佳的解决方案，共享一个可行的方法。
输入：
信息：

hi there
He said "Hi, how are you doing ?"
HI there
Hello there

钥匙：

hi

Pig脚本：

messages = LOAD 'messages.csv' USING PigStorage('\t') AS (message:chararray);
keys = LOAD 'keys.csv' USING PigStorage('\t') AS (key:chararray);

crossed_data = CROSS messages, keys ;

filt_required_data = FILTER crossed_data BY LOWER(messages::message) MATCHES CONCAT('.*', LOWER(keys::key), '.*');

required_data =  FOREACH filt_required_data GENERATE messages::message AS message;

DUMP required_data;

输出：

(hi there)
(He said "Hi, how are you doing ?")
(HI there)