regex - How to filter out alphanumeric values using regular expression in pig -


pig code

relation2 =  filter relation1 column1 not matches '.*[a-z0-9.*].*'

hive logic

column1 not '%[a-z0-9]%'.

i want implement same logic in pig.

i think don't need alpha numeric records.

you records have either alphabets or numbers.

could try :

input :

(123aet) (123) (aet) (236met)

so expected output 

 (123)  (aet)

pig script : script generic script can keep alphabets alone or number alone or alphanumeric alone or both further processing 

records = load '/home/dir/alphanumeric.txt' using pigstorage(',') as(c1:chararray);  records_each = foreach records generate c1,  (regex_extract(c1,'(^[a-za-z]+$)',1) not null ? 'alphabets' : (regex_extract(c1,'(^[0-9]+$)',1) not null ? 'numbers' : 'alphanumerics')) c1_type;  records_filter = filter records_each c1_type in( 'alphabets','numbers');  records_output = foreach records_filter generate c1;  dump records_output;

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