fixed error ranges and add trigger tests

sample/definitions/function/syntax_error_trigger_column_does_not_exist.pgsql

@@ -0,0 +1,36 @@
+CREATE TABLE users_1 (
+  id integer not null PRIMARY KEY,
+  updated_at timestamp with time zone not null DEFAULT now()
+);
+CREATE TABLE users_2 (
+  id integer not null PRIMARY KEY
+);
+CREATE TABLE users_3 (
+  id integer not null PRIMARY KEY
+);
+
+DROP trigger IF EXISTS update_users_1_modtime on user_1;
+DROP trigger IF EXISTS update_users_2_modtime on user_2;
+DROP trigger IF EXISTS update_users_3_modtime on user_3;
+
+create or replace function update_updated_at_column ()
+  returns trigger
+  language plpgsql
+  as $function$
+begin
+  new.updated_at = NOW();
+  return new;
+end;
+$function$;
+
+create trigger update_users_3_modtime -- should raise error
+  before update on users_3 for each row
+  execute function update_updated_at_column ();
+
+create trigger update_users_1_modtime
+  before update on users_1 for each row
+  execute function update_updated_at_column ();
+
+create trigger update_users_2_modtime -- should raise error
+  before update on users_2 for each row
+  execute function update_updated_at_column ();