Hive: how to show all partitions of a table?

Question

I have a table with 1000+ partitions.

\"Show partitions\" command only lists a small number of partitions.

How can i show all partitions?

U

Answer 1

Okay, I'm writing this answer by extending wmky's answer above & also, assuming that you've configured mysql for your metastore instead of derby.

select PART_NAME FROM PARTITIONS WHERE TBL_ID=(SELECT TBL_ID FROM TBLS WHERE TBL_NAME='');

The above query gives you all possible values of the partition columns.

Example:

hive> desc clicks_fact;
OK
time                    timestamp                                   
..                              
day                     date                                        
file_date               varchar(8)                                  

# Partition Information      
# col_name              data_type               comment             

day                     date                                        
file_date               varchar(8)                                  
Time taken: 1.075 seconds, Fetched: 28 row(s)

I'm going to fetch the values of partition columns.

mysql> select PART_NAME FROM PARTITIONS WHERE TBL_ID=(SELECT TBL_ID FROM TBLS WHERE TBL_NAME='clicks_fact');
+-----------------------------------+
| PART_NAME                         |
+-----------------------------------+
| day=2016-08-16/file_date=20160816 |
| day=2016-08-17/file_date=20160816 |
....
....
| day=2017-09-09/file_date=20170909 |
| day=2017-09-08/file_date=20170909 |
| day=2017-09-09/file_date=20170910 |
| day=2017-09-10/file_date=20170910 |
+-----------------------------------+

1216 rows in set (0.00 sec)

Returns all partition columns.

Note: JOIN table DBS ON DB_ID when there is a DB involved (i.e, when, multiple DB's have same table_name)