Hi Mohammed
Internally In hive the processing is done using MapReduce. So like in mapreduce
the splits are calculated on job submission and a mapper is assigned per split.
So a mapper ideally process a split and not a row.
You can store data in various formats as text, sequence files, RC files etc. No
restriction just on text files.
Regards
Bejoy KS
Sent from handheld, please excuse typos.
-----Original Message-----
From: Mohammad Tariq <donta...@gmail.com>
Date: Fri, 29 Jun 2012 00:17:05
To: user<user@hive.apache.org>
Reply-To: user@hive.apache.org
Subject: Hive mapper creation
Hello list,
Since Hive tables are assumed to be of text input format, is
it right to assume that a mapper is created per row of a particular
table??Please correct me if my understanding is wrong. Also let me
know how mappers are created corresponding to a Hive query. Many
thanks.
Regards,
Mohammad Tariq
