jsonschema

pig build pkg jsonschema;		# build rpm/deb

pig repo add pgsql -u   # add both repo and update cache

pig install jsonschema;		# install via package name, for the active PG version

pig install jsonschema -v 18;   # install for PG 18
pig install jsonschema -v 17;   # install for PG 17
pig install jsonschema -v 16;   # install for PG 16
pig install jsonschema -v 15;   # install for PG 15
pig install jsonschema -v 14;   # install for PG 14

CREATE EXTENSION jsonschema;

CREATE EXTENSION IF NOT EXISTS jsonschema;

SELECT jsonschema_is_valid(
  '{
     "type": "object",
     "required": ["name", "email"],
     "properties": {
       "name":  { "type": "string" },
       "age":   { "type": "number", "minimum": 0 },
       "email": { "type": "string", "format": "email" }
     }
   }'::json
);

SELECT jsonschema_validates(
  '{"name":"Amos Burton","email":"amos@rocinante.ship"}'::json,
  '{
     "type": "object",
     "required": ["name", "email"],
     "properties": {
       "name":  { "type": "string" },
       "email": { "type": "string", "format": "email" }
     }
   }'::json
);

CREATE TABLE customer_profile (
  id       bigserial PRIMARY KEY,
  profile  jsonb NOT NULL,
  CHECK (
    jsonschema_validates(
      profile,
      '{
         "type": "object",
         "required": ["email"],
         "properties": {
           "email": { "type": "string", "format": "email" },
           "tags":  {
             "type": "array",
             "items": { "type": "string", "maxLength": 16 }
           }
         }
       }'::jsonb
    )
  )
);

SELECT jsonschema_validates(
  jsonb_build_object(
    'first_name', 'Naomi',
    'last_name', 'Nagata',
    'shipping_address', jsonb_build_object(
      'street_address', '1 Rocinante Way',
      'city', 'Ceres Station',
      'state', 'The Belt'
    )
  ),
  'https://example.com/schemas/customer',
  '{
     "$id": "https://example.com/schemas/address",
     "type": "object",
     "required": ["street_address", "city", "state"],
     "properties": {
       "street_address": { "type": "string" },
       "city": { "type": "string" },
       "state": { "type": "string" }
     }
   }'::jsonb,
  '{
     "$id": "https://example.com/schemas/customer",
     "type": "object",
     "required": ["first_name", "last_name", "shipping_address"],
     "properties": {
       "first_name": { "type": "string" },
       "last_name": { "type": "string" },
       "shipping_address": { "$ref": "/schemas/address" }
     }
   }'::jsonb
);

SELECT json_matches_schema(
  '{"type":"string","maxLength":4}'::json,
  '"1234"'::json
);

SELECT jsonb_matches_schema(
  '{"type":"object","required":["id"]}'::json,
  '{"id":42}'::jsonb
);

SET jsonschema.default_draft = 'V2020';
SET jsonschema.default_draft = 'V7';