Schema in Pig after Flattening the String - schema

Question

I am having the problem in implementing the field object ( schema) after flatting the string in pig. I have the following code:
Data = load 'data/*.txt' using PigStorage( ) AS(...., date:chararray, .....);
B = foreach Data FLATTEN(REGEX_EXTRACT_ALL(date, '"(.)/(.)/(.*)
(.):(.):(.*)"')) AS (month:int, day:int, year:int, hour:int, min:int, second:int);
--B = filter B by year==2015;
--B = filter B by month ==1 OR month ==2;
C = foreach B generate speed, month, day, year, hour, min;
store C into 'data/out_files' using PigStorage(',');
Where date is in the form ( '2/23/2015 23:56:49')
This works perfectly fine. But when I use filter in B ( year ==2015 or month ==1 OR month ==2), this code does not work. Do you have a good idea how to use any field after flattening String?. Thank you for your help.

Answer 1

Can you try this?
input:
2/23/2015 23:56:49
1/23/2014 23:56:49
9/23/2014 23:56:49
8/23/2014 23:56:49
PigScript:
A = LOAD 'input' AS (date:chararray);
B = FOREACH A GENERATE FLATTEN(REGEX_EXTRACT_ALL(date, '([0-9]+)/([0-9]+)/([0-9]+)\\s+([0-9]+):([0-9]+):([0-9]+)')) AS (month,day,year,hour,min,second);
C = FILTER B BY (month==1) OR (month==2) OR (year==2015);
D = FOREACH C GENERATE month,day,year,hour,min,second;
DUMP D;
Output:
(2,23,2015,23,56,49)
(1,23,2014,23,56,49)
The below Regex also works.
B = FOREACH A GENERATE FLATTEN(REGEX_EXTRACT_ALL(date, '(\\d+)/(\\d+)/(\\d+)\\s+(\\d+):(\\d+):(\\d+)')) AS (month,day,year,hour,min,second);