Filter a string on the basis of a word

问题

I have a pig job where in I need to filter the data by finding a word in it,

Here is the snippet

A = LOAD '/home/user/filename' USING PigStorage(',');
B = FOREACH A GENERATE $27,$38;
C = FILTER B BY ( $1 ==  '*Word*');
STORE C INTO '/home/user/out1' USING PigStorage();

The error is in the 3rd line while finding C, I have also tried using

C = FILTER B BY $1 MATCHES '*WORD*'  

Also

C = FILTER B BY $1 MATCHES '\\w+WORD\\w+'  

回答1:

MATCHES uses regular expressions. You should do ... MATCHES '.*WORD.*' instead.

These is an example here finding the word 'apache'.

来源：https://stackoverflow.com/questions/7445832/filter-a-string-on-the-basis-of-a-word