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From Navdeep Agrawal <>
Subject Hive Stats
Date Tue, 22 Jul 2014 17:14:16 GMT
i am trying to compute statistics on ORC File but i am unable see any changes in PART_COL_STATS
as well on using

set hive.compute.query.using.stats=true;
set hive.stats.reliable=true;
set hive.stats.fetch.column.stats=true;
set hive.stats.fetch.partition.stats=true;
set hive.cbo.enable=true;

to get max value of a column it is running full Map reduce on column ..
what i want to use is max value stored in meta store ,but i am unable to catch these statistics

my table desc is
load_inst_id int
src_filename string
server_date date

my analyze query is
analyze table mytable partition(server_date=’2013-11-30′) compute statistics for columns

i am always getting 0 as loadinstant id ,i have to turn off my hive.compute.query.using.stats
to get correct result(through map reduce max(load_inst_id))

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