Declaring a variable and schema in PIG

Question

how to declare a variable in PIG? suppose i want to have a integer to have values as 10 how can i declare it in script? and how schema can be reused ?

score 11 · Accepted Answer · edited May 14 '14 at 21:57

11

I think you can use the 'Declare' command. It is used to describe one parameter and is used within the PIG script.

    %declare DESC 'Database'
    A = load 'data' as (name, desc);
    B = FILTER A by desc eq '$DESC';
    .....

You can get more about it here. Pig Parameter

edited May 14 '14 at 21:57

kubi

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answered Jan 31 '12 at 08:24

Debaditya

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There shouldn't have been a '$' before the DESC declaration. I fixed it, should work now. – kubi May 14 '14 at 21:58
It should start working in Pig version 0.14.0 according to https://issues.apache.org/jira/browse/PIG-2122 – Ankit Dhingra Aug 07 '15 at 18:33

Declaring a variable and schema in PIG

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