hive-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ryan Harris <Ryan.Har...@zionsbancorp.com>
Subject RE: how to get counts as a byproduct of a query
Date Wed, 02 Dec 2015 20:41:08 GMT
https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-MULTITABLEINSERT

From: Frank Luo [mailto:jluo@merkleinc.com]
Sent: Wednesday, December 02, 2015 1:26 PM
To: user@hive.apache.org
Subject: RE: how to get counts as a byproduct of a query

Didn’t get any response, so trying one more time. I cannot believe I am the only one facing
the problem.

From: Frank Luo
Sent: Tuesday, December 01, 2015 10:40 PM
To: user@hive.apache.org
Subject: how to get counts as a byproduct of a query

Very often I need to run a query against a table(s), then collect some counts. I am wondering
if there is a way to kill two birds by scanning the table once. (I don’t mind to save the
counts as a separate file or something like that)

For example, I got a table A and B. I need to do an inner join to get some result. In the
meaning time, I need to know the table counts for both A and B. Is there a smart way to get
join result as well as the counts by reading the tables once?

Thanks in advance.

This email and any attachments transmitted with it are intended for use by the intended recipient(s)
only. If you have received this email in error, please notify the sender immediately and then
delete it. If you are not the intended recipient, you must not keep, use, disclose, copy or
distribute this email without the author’s prior permission. We take precautions to minimize
the risk of transmitting software viruses, but we advise you to perform your own virus checks
on any attachment to this message. We cannot accept liability for any loss or damage caused
by software viruses. The information contained in this communication may be confidential and
may be subject to the attorney-client privilege.

======================================================================
THIS ELECTRONIC MESSAGE, INCLUDING ANY ACCOMPANYING DOCUMENTS, IS CONFIDENTIAL and may contain
information that is privileged and exempt from disclosure under applicable law. If you are
neither the intended recipient nor responsible for delivering the message to the intended
recipient, please note that any dissemination, distribution, copying or the taking of any
action in reliance upon the message is strictly prohibited. If you have received this communication
in error, please notify the sender immediately.  Thank you.
Mime
View raw message