Option 1. Prepare parts from from table with Engine=File defined in metadata, read from an arbitrary path
1	2020-01-01	String
2	2020-02-02	Another string
3	2020-03-03	One more string
4	2020-01-02	String for first partition
Option 2. Prepare parts from from table with Engine=File defined in metadata, read from stdin (pipe)
11	2020-01-01	String
12	2020-02-02	Another string
13	2020-03-03	One more string
14	2020-01-02	String for first partition
Option 3. Prepare parts from from table with Engine=File defined via command line, read from stdin (pipe)
21	2020-01-01	String
22	2020-02-02	Another string
23	2020-03-03	One more string
24	2020-01-02	String for first partition
Possibility to run optimize on prepared parts before sending parts to server
202001	1
202002	1
202003	1