hiveql - In Hive, How to select only values of one of the dynamic partitions (when there are one or more partitions available) -


now have table has structure follows,

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)

now want partitions of table.

hive> show partitions clicks_fact; ok day=2016-09-02/file_date=20160902 .. day=2017-06-30/file_date=20170629 time taken: 0.144 seconds, fetched: 27 row(s)

i partitions combination of both day & file_date. now, there way values of file_date

hive offers limited options metadata retrieval.
query metastore directly.

demo

hive

create table clicks_fact (i int) partitioned (day date,file_date int) ;  alter table clicks_fact add     partition (day=date '2016-09-02',file_date=20160901)     partition (day=date '2016-09-02',file_date=20160902)     partition (day=date '2016-09-03',file_date=20160901)     partition (day=date '2016-09-03',file_date=20160902)     partition (day=date '2016-09-03',file_date=20160903) ;

metastore (mysql)

use metastore;   select  distinct         pkv.part_key_val             dbs                 d          join    tbls                t          on      t.db_id =                 d.db_id          join    partition_keys      pk          on      pk.tbl_id =                 t.tbl_id          join    partitions          p          on      p.tbl_id =                 t.tbl_id                 join    partition_key_vals  pkv          on      pkv.part_id =                 p.part_id              , pkv.integer_idx =                 pk.integer_idx           d.name       = 'local_db'     , t.tbl_name   = 'clicks_fact'     , pk.pkey_name = 'file_date' ; 
+--------------+ | part_key_val | +--------------+ |     20160901 | |     20160902 | |     20160903 | +--------------+

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