Question
why should we use ‘filters’ in pig scripts?
Answers
Filters are similar to where clause in SQL.filter which contain predicate.If that predicate evaluates to true for a given record, that record will be passed down the pipeline. Otherwise, it will not.predicate contain different operators like ==,>=,<=,!=.so,== and != can be applied to maps and tuples.
A= load ‘inputs’ as(name,address.
B=filter A by symbol matches ‘CM.*';   Your Comment




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