diff --git a/src/languages/postgresql/postgresql.formatter.ts b/src/languages/postgresql/postgresql.formatter.ts
index e46fddce8..27bdfe5ea 100644
--- a/src/languages/postgresql/postgresql.formatter.ts
+++ b/src/languages/postgresql/postgresql.formatter.ts
@@ -116,10 +116,10 @@ const tabularOnelineClauses = expandPhrases([
   'COMMIT PREPARED',
   'COPY',
   'CREATE ACCESS METHOD',
-  'CREATE AGGREGATE',
+  'CREATE [OR REPLACE] AGGREGATE',
   'CREATE CAST',
   'CREATE COLLATION',
-  'CREATE CONVERSION',
+  'CREATE [DEFAULT] CONVERSION',
   'CREATE DATABASE',
   'CREATE DOMAIN',
   'CREATE EVENT TRIGGER',
@@ -128,18 +128,18 @@ const tabularOnelineClauses = expandPhrases([
   'CREATE FOREIGN TABLE',
   'CREATE [OR REPLACE] FUNCTION',
   'CREATE GROUP',
-  'CREATE INDEX',
-  'CREATE LANGUAGE',
+  'CREATE [UNIQUE] INDEX',
+  'CREATE [OR REPLACE] [TRUSTED] [PROCEDURAL] LANGUAGE',
   'CREATE OPERATOR',
   'CREATE OPERATOR CLASS',
   'CREATE OPERATOR FAMILY',
   'CREATE POLICY',
-  'CREATE PROCEDURE',
+  'CREATE [OR REPLACE] PROCEDURE',
   'CREATE PUBLICATION',
   'CREATE ROLE',
-  'CREATE RULE',
-  'CREATE SCHEMA',
-  'CREATE SEQUENCE',
+  'CREATE [OR REPLACE] RULE',
+  'CREATE SCHEMA [AUTHORIZATION]',
+  'CREATE {TEMPORARY | TEMP | UNLOGGED} SEQUENCE',
   'CREATE SERVER',
   'CREATE STATISTICS',
   'CREATE SUBSCRIPTION',
@@ -148,8 +148,8 @@ const tabularOnelineClauses = expandPhrases([
   'CREATE TEXT SEARCH DICTIONARY',
   'CREATE TEXT SEARCH PARSER',
   'CREATE TEXT SEARCH TEMPLATE',
-  'CREATE TRANSFORM',
-  'CREATE TRIGGER',
+  'CREATE [OR REPLACE] TRANSFORM',
+  'CREATE [OR REPLACE] [CONSTRAINT] TRIGGER',
   'CREATE TYPE',
   'CREATE USER',
   'CREATE USER MAPPING',
diff --git a/test/postgresql.test.ts b/test/postgresql.test.ts
index cd4f9a9e5..c725b57bc 100644
--- a/test/postgresql.test.ts
+++ b/test/postgresql.test.ts
@@ -398,4 +398,11 @@ describe('PostgreSqlFormatter', () => {
       })
     ).toBe('CREATE TABLE foo (bar JSON, baz JSONB);');
   });
+
+  // Issue #850
+  it('supports OR REPLACE in CREATE PROCEDURE', () => {
+    expect(format(`CREATE OR REPLACE PROCEDURE foo () LANGUAGE sql AS $$ BEGIN END $$;`)).toBe(
+      dedent`CREATE OR REPLACE PROCEDURE foo () LANGUAGE sql AS $$ BEGIN END $$;`
+    );
+  });
 });