-Re: External table for hourly log files
Ian 2013-03-28, 18:26
Thanks, but it seems it relates only to inserts. How can I use dynamic partition on the query?
So if I changed the log path to use the Hive's directory naming convention (e.g., dt=2013-03-08/hr=01), I still need to Add Partition multiple times. How can dynamic partitions help in this case?
CREATE EXTERNAL TABLE testpart (logline string) PARTITIONED BY(dt string, hr string);
ALTER TABLE testpart ADD PARTITION(dt='2013-03-08', hr='01);
From: Sanjay Subramanian <[EMAIL PROTECTED]>
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>; Ian <[EMAIL PROTECTED]>
Sent: Thursday, March 28, 2013 10:41 AM
Subject: Re: External table for hourly log files
You may want to look at Dynamic partitions
From: Ian <[EMAIL PROTECTED]>
Reply-To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>, Ian <[EMAIL PROTECTED]>
Date: Thursday, March 28, 2013 10:29 AM
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Subject: External table for hourly log files
We use Hive "Insert Overwrite Directory" to copy the hourly logs to hdfs. So there are lots of directories like these:
Now we want to create external table to query the log data. So we use the "Add Partition".
CREATE EXTERNAL TABLE testpart (logline string) PARTITIONED BY(dt string);
ALTER TABLE testpart ADD PARTITION(dt='2013-03-08-01') LOCATION '/my/logs/2013-03-08/01';
This works fine. However if we want say one week worth of logs, then we need to repeat "Add Partition" 24*7 times. I'm wondering if there is other way to avoid specifying Partition statements so many times, maybe something like wildcard "2013-03-08/*"? If not, what's the general practice to handle these hourly logs?
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