PostgreSQL Import JSON that structured array -> array? - postgresql

Question

As I googled and some read SO posts like sql - How can I import a JSON file into PostgreSQL? - Stack Overflow, I found a way to parse/import JSON that structured array -> object, such as following(a), using json_populate_recordset, or line by line object, like (b), but I want to import JSON that structured array -> array, like following(c).
(a)
'[
{
"id": 23635,
"name": "Jerry Green",
"comment": "Imported from facebook."
},
{
"id": 23636,
"name": "John Wayne",
"comment": "Imported from facebook."
}
]
(b)
{"id": 23635,"name": "Jerry Green","comment": "Imported from facebook."}
{"id": 23636,"name": "John Wayne","comment": "Imported from facebook."}
(c) ←← wanna parse (actually hundreds of lines not just two)
[
[
1621900800000,
38642.4422973396
],
[
1621932800000,
38192.49969227624
]
]

Answer 1

Here is an idea how you could do this.
insert into my_table (my_bigint_column, my_numeric_column)
select (ja ->> 0)::bigint, (ja ->> 1)::numeric -- mapping expressions here
from jsonb_array_elements
(
$JSONTEXT$
[
[
1621900800000,
38642.4422973396
],
[
1621932800000,
38192.49969227624
]
]
$JSONTEXT$::jsonb) ja;
or, as a parameterized query
insert into my_table (my_bigint_column, my_numeric_column)
select (ja ->> 0)::bigint, (ja ->> 1)::numeric -- mapping expressions here
from jsonb_array_elements (:jsontext::jsonb) ja;
Hundreds of lines would not be an issue.