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Pig >> mail # user >> Does pig support in clause?

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Re: Does pig support in clause?
This type of in is really a semi-join.  So you could rewrite this as:

B1 = join A by A1, C by A1;
B2 = filter B1 by SIZE(C) > 0;
B = foreach B2 flatten(A);


On Jun 25, 2012, at 2:50 AM, yonghu wrote:

> Dear all,
> in the sql, there is a in clause  which is used to check if the value
> is in a set or not? Does pig also have the same in clause? Such as:
> B = filter A by A1 in C;
> A,B,C are relation names and A1 is a column_name of A.
> Thanks!
> Yong