-- Make sure the DSO is loaded.
SELECT jsonschema_is_valid('{"type": "object"}'::json);
 jsonschema_is_valid 
---------------------
 t
(1 row)

-- Should default to 2020
SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V2020
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V2020
(1 row)

-- Set to 2019
SELECT set_config('jsonschema.default_draft', 'V2019', false);
 set_config 
------------
 V2019
(1 row)

SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V2019
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V2019
(1 row)

-- Set to v7
SELECT set_config('jsonschema.default_draft', 'V7', false);
 set_config 
------------
 V7
(1 row)

SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V7
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V7
(1 row)

-- Set to v6
SELECT set_config('jsonschema.default_draft', 'V6', false);
 set_config 
------------
 V6
(1 row)

SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V6
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V6
(1 row)

-- Set to v4
SELECT set_config('jsonschema.default_draft', 'V4', false);
 set_config 
------------
 V4
(1 row)

SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V4
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V4
(1 row)

-- Set to invalid value
SELECT set_config('jsonschema.default_draft', 'Nope', false);
ERROR:  invalid value for parameter "jsonschema.default_draft": "Nope"
HINT:  Available values: V4, V6, V7, V2019, V2020.
SELECT current_setting('jsonschema.default_draft');
 current_setting 
-----------------
 V4
(1 row)

SHOW jsonschema.default_draft;
 jsonschema.default_draft 
--------------------------
 V4
(1 row)