Hello,
I've a script which group lot of alias and is doing some operation on it.
But it can happen that I don't need one of this alias. To don't change my
code, I would like to create an empty alias. How can I do that ?
Actually my code is like that :
A = LOAD A AS (id, a1, a2);
B = LOAD A AS (id, b1, b2);
C = LOAD A AS (id, c1, c2);
GROUP = COGROUP A BY id, B BY id, C BY id;
GROUP2 = FOREACH GROUP GENERATE TOTUPLE(A, B, C) AS ALL;
OPERATION = FOREACH GROUP2 GENERATE MyUDF(ALL);
And I would like to do something like that :
A = LOAD A AS (id, a1, a2);
B = LOAD A AS (id, b1, b2);
*C = LOAD NULL AS (id, c1, c2); <- Generate an empty alias with column id,
c1, c2;*
GROUP = COGROUP A BY id, B BY id, C BY id;
GROUP2 = FOREACH GROUP GENERATE TOTUPLE(A, B, C) AS ALL;
OPERATION = FOREACH GROUP2 GENERATE MyUDF(ALL);
Thanks,
--
*Kevin Lion**
* [image: logo]
* Contact info *
[email protected] <[email protected]>
www.capptain.com
* Rennes Office *
Office: +33 2 99 65 69 13
10 rue Duhamel
35000 Rennes
* Paris Office *
Office: +33 1 34 43 28 89
18 rue Tronchet
75008 Paris
IMPORTANT NOTICE – UBIKOD and CAPPTAIN are registered trademarks of
UBIKOD S.A.R.L., all copyrights are reserved. The contents of this email
and attachments are confidential and may be subject to legal privilege
and/or protected by copyright. Copying or communicating any part of it to
others is prohibited and may be unlawful. If you are not the intended
recipient you must not use, copy, distribute or rely on this email and
should please return it immediately or notify us by telephone. At present
the integrity of email across the Internet cannot be guaranteed. Therefore
UBIKOD S.A.R.L. will not accept liability for any claims arising as a
result of the use of this medium for transmissions by or to UBIKOD
S.A.R.L.. UBIKOD S.A.R.L. may exercise any of its rights under relevant
law, to monitor the content of all electronic communications. You should
therefore be aware that this communication and any responses might have
been monitored, and may be accessed by UBIKOD S.A.R.L. The views expressed
in this document are that of the individual and may not necessarily
constitute or imply its endorsement or recommendation by UBIKOD S.A.R.L.
The content of this electronic mail may be subject to the confidentiality
terms of a "Non-Disclosure Agreement" (NDA).
