On 10.11.2016 09:54, Michael Paquier wrote:
Yes, definitely.
=# create table json_data (a jsonb);
CREATE TABLE
=# INSERT INTO json_data values ('{}'::jsonb), ('[]'::jsonb),
('null'::jsonb), ('true'::jsonb), ('1'::jsonb), ('""'::jsonb);
INSERT 0 6
=# SELECT * FROM json_data ORDER BY 1 DESC;
a
------
{}
true
1
""
null
[]
(6 rows)
So that's object > boolean > integer > string > NULL > array.
And attached is a patch.
Perhaps I did not explain it clearly enough, but only *empty top-level*
arrays are out of the correct order.
See complete example:
=# SELECT * FROM (VALUES
('null'::jsonb), ('0'), ('""'), ('true'), ('[]'), ('{}'),
('[null]'), ('[0]'), ('[""]'), ('[true]'), ('[[]]'), ('[{}]'),
('{"a": null}'), ('{"a": 0}'), ('{"a": ""}'), ('{"a": true}'),
('{"a": []}'), ('{"a": {}}')
) valsORDER BY 1;
column1
-------------
[]
null
""
0
true
[null]
[""]
[0]
[true]
[[]]
[{}]
{}
{"a": null}
{"a": ""}
{"a": 0}
{"a": true}
{"a": []}
{"a": {}}
(18 rows)
--
Nikita Glukhov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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