java - Pig: Regular Expression syntax -


i using string comparison using regular expression in pig script.

i know regular expression in pig same java.

the problem facing is: need remove character contain white space @ trailing end ?

my regular expression this: (name matches '!\\s+$')

sample script-----

raw_data = load '$input' using pigstorage(',') (fname:chararray); filter_data = filter raw_data (fname matches '!\\s+$'); dump filter_data;

sample input-----

abcd    ,123 pqrs,234 xyz ,234 lmn,2345

it not writing on stdout, should have written "pqrs" , "lmn".

i don't know pig, in java 1 syntactically-correct regex match pqrs,234 , lmn,2345 , be:

^\s+$

assuming in multiline mode.

  • in java escape backslashes, turns ^\\s+$
  • in java can turn on multiline (?m) regex (?m)^\\s+$

see demo.


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