Import to PostgreSQL from partly csv, partly JSON - json

Question

I'm running PostgreSQL 9.6, and I've got a table consisting of lots of columns.
I've got a csv-file containing the following format:
id, insert_time, JSON-object
The JSON-object has the following format:
{ column_nameY: valueX, column_nameY: valueY, ... }
The column_names in the JSON-object matches the columns in my PostgreSQL-table.
Is there a dynamic way to import such file, so I'll get the id, insert_time, and the remaining column values from the JSON object?
The order of columns in the JSON object might not match the order of the columns in the PostgreSQL table.

Answer 1

I am assuming you know how to get that csv file imported into postgresql and that you know the fields inside that json object field.
first we create a table to store the contents of the csv file. Notice the datatype of that JSON field is jsonb.
create table test11 (id int, insert_time timestamp, json_object jsonb )
Know you import the csv file. but for illustration purposes, i will insert sample data into this Table.
insert into test11 (id, insert_time, json_object) values (1, '2017-11-14'::timestamp, '{ "column_nameX": "3", "column_nameY": "4" }'::jsonb);
insert into test11 (id, insert_time, json_object) values (1, '2017-11-14'::timestamp, '{ "column_nameX": "13", "column_nameY": "14" }'::jsonb);
we now select from that table;
Select id, insert_time, json_object->>'column_nameY' as Column_NameY, json_object->>'column_nameX' as Column_NameX from test11
your results should look like this...
id |insert_time |column_namey |column_namex
1 |11/14/2017 |4 |3
1 |11/14/2017 |14 |13
-HTH