Add support for Postgresql JSON and JSONB data types (#831)

Author: nene

src/languages/postgresql/postgresql.keywords.ts

@@ -139,6 +139,8 @@ export const dataTypes: string[] = [
   'INTERVAL', // (cannot be function or type)
   'NCHAR', // (cannot be function or type)
   'NUMERIC', // (cannot be function or type)
+  'JSON',
+  'JSONB',
   'PRECISION', // (cannot be function or type), requires AS
   'REAL', // (cannot be function or type)
   'SMALLINT', // (cannot be function or type)

test/postgresql.test.ts

@@ -390,4 +390,12 @@ describe('PostgreSqlFormatter', () => {
       CREATE OR REPLACE FUNCTION foo ();
     `);
   });
+
+  it('formats JSON and JSONB data types', () => {
+    expect(
+      format(`CREATE TABLE foo (bar json, baz jsonb);`, {
+        dataTypeCase: 'upper',
+      })
+    ).toBe('CREATE TABLE foo (bar JSON, baz JSONB);');
+  });
 });