-- SETUP
CREATE EXTENSION hypopg;
CREATE TABLE hypo (id integer, val text);
INSERT INTO hypo SELECT i, 'line ' || i
FROM generate_series(1,100000) f(i);
ANALYZE hypo;
-- TESTS
SELECT COUNT(*) AS nb
FROM public.hypopg_create_index('SELECT 1;CREATE INDEX ON hypo(id); SELECT 2');
WARNING:  hypopg: SQL order #1 is not a CREATE INDEX statement
WARNING:  hypopg: SQL order #3 is not a CREATE INDEX statement
 nb 
----
  1
(1 row)

SELECT nspname, relname, amname FROM public.hypopg_list_indexes();
 nspname | relname | amname 
---------+---------+--------
 public  | hypo    | btree
(1 row)