蜂巢计算统计HDP 2.6

Question

Trying to see statistics on a particular column. I executed the ANALYZE command first and then tried to see the stats by DESCRIBE FORMATTED <table_name> <col_name> .

I cant see any values in this. Any idea why its not showing any values?

I tried MSCK and analyzed the table again and checked for stats. No luck so far.

hive> desc extended testdb.table order_dispatch_diff;
OK
order_dispatch_diff     int                     from deserializer
Time taken: 0.041 seconds, Fetched: 1 row(s)

Answer 1

Try to do it with FOR COLUMNS parameter:

ANALYZE TABLE testdb.table COMPUTE STATISTICS FOR COLUMNS;

Then use DESCRIBE FORMATTED testdb.table order_dispatch_diff; to display statistics.

See Column Statistics docs for more details.

Answer 2

Below Statement worked for me finally .

hive> desc formatted testdb.table col_name partition (data_dt='20180715');