This could be a cool rewrite feature like CUBE/SAMPLE. Russell Jurney http://datasyndrome.com
On Jun 25, 2012, at 9:39 AM, Alan Gates <[email protected]> wrote: > 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); > > Alan. > > 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 >
