teledb=# \d+ t_range
                                            Table "public.t_range"
 Column |            Type             | Collation | Nullable | Default | Storage | Stats target | Description 
--------+-----------------------------+-----------+----------+---------+---------+--------------+-------------
 f1     | bigint                      |           |          |         | plain   |              | 
 f2     | timestamp without time zone |           |          | now()   | plain   |              | 
 f3     | integer                     |           |          |         | plain   |              | 
Distribute By: SHARD(f1)
Location Nodes: ALL DATANODES
Partition By: RANGE(f3)
	 # Of Partitions: 3
	 Start With: 1
	 Interval Of Partition: 50

teledb=# alter table t_range add partitions 2;
ALTER TABLE
teledb=# \d+ t_range
                                            Table "public.t_range"
 Column |            Type             | Collation | Nullable | Default | Storage | Stats target | Description 
--------+-----------------------------+-----------+----------+---------+---------+--------------+-------------
 f1     | bigint                      |           |          |         | plain   |              | 
 f2     | timestamp without time zone |           |          | now()   | plain   |              | 
 f3     | integer                     |           |          |         | plain   |              | 
Distribute By: SHARD(f1)
Location Nodes: ALL DATANODES
Partition By: RANGE(f3)
	 # Of Partitions: 5
	 Start With: 1
	 Interval Of Partition: 50