CREATE TABLE t (i int PRIMARY KEY);
INSERT INTO t SELECT generate_series(1, 5);
SELECT pgivm.create_immv('mv', 'SELECT * FROM t');
NOTICE:  created index "mv_index" on immv "mv"
 create_immv 
-------------
           5
(1 row)

SELECT immvrelid, ispopulated FROM pgivm.pg_ivm_immv ORDER BY 1;
 immvrelid | ispopulated 
-----------+-------------
 mv        | t
(1 row)

-- Refresh IMMV with data
SELECT pgivm.refresh_immv('mv', true);
 refresh_immv 
--------------
            5
(1 row)

SELECT immvrelid, ispopulated FROM pgivm.pg_ivm_immv ORDER BY 1;
 immvrelid | ispopulated 
-----------+-------------
 mv        | t
(1 row)

INSERT INTO t VALUES(6);
SELECT i FROM mv ORDER BY 1;
 i 
---
 1
 2
 3
 4
 5
 6
(6 rows)

-- Make IMMV unpopulated
SELECT pgivm.refresh_immv('mv', false);
 refresh_immv 
--------------
            0
(1 row)

SELECT immvrelid, ispopulated FROM pgivm.pg_ivm_immv ORDER BY 1;
 immvrelid | ispopulated 
-----------+-------------
 mv        | f
(1 row)

SELECT i FROM mv ORDER BY 1;
 i 
---
(0 rows)

-- Immediate maintenance is disabled. IMMV can be scannable and is empty.
INSERT INTO t VALUES(7);
SELECT i FROM mv ORDER BY 1;
 i 
---
(0 rows)

-- Refresh the IMMV and make it populated.
SELECT pgivm.refresh_immv('mv', true);
 refresh_immv 
--------------
            7
(1 row)

SELECT immvrelid, ispopulated FROM pgivm.pg_ivm_immv ORDER BY 1;
 immvrelid | ispopulated 
-----------+-------------
 mv        | t
(1 row)

SELECT i FROM mv ORDER BY 1;
 i 
---
 1
 2
 3
 4
 5
 6
 7
(7 rows)

-- Immediate maintenance is enabled.
INSERT INTO t VALUES(8);
SELECT i FROM mv ORDER BY 1;
 i 
---
 1
 2
 3
 4
 5
 6
 7
 8
(8 rows)

-- Use qualified name
SELECT pgivm.refresh_immv('public.mv', true);
 refresh_immv 
--------------
            8
(1 row)

-- Use not existing IMMV
SELECT pgivm.refresh_immv('mv_not_existing', true);
ERROR:  relation "mv_not_existing" does not exist
-- Try to refresh a normal table -- error
SELECT pgivm.refresh_immv('t', true);
ERROR:  "t" is not an IMMV