-- Using script https://github.com/array-analytics/plpg_hashids

DROP TABLE fruits;

CREATE TABLE fruits (
	id SERIAL UNIQUE NOT NULL,
	hash_id VARCHAR(16) PRIMARY KEY
			DEFAULT hashids.encode(currval(pg_get_serial_sequence('fruits', 'id')), 'SALT', 16),
	fruit_name VARCHAR
);

INSERT INTO fruits (fruit_name) VALUES ('apple'), ('banana'), ('orange');
-- psql:/scripts/hashid.sql:18: NOTICE:  {1}[1]: 1 for 1
-- psql:/scripts/hashid.sql:18: NOTICE:  {2}[1]: 2 for 1
-- psql:/scripts/hashid.sql:18: NOTICE:  {3}[1]: 3 for 1
-- INSERT 0 3

SELECT * FROM fruits;
-- INSERT 0 3
--  id |     hash_id      | fruit_name
-- ----+------------------+------------
--   1 | AaW52xD2Q3zLPqbo | apple
--   2 | jGQ7MkDaMDXAK0Jx | banana
--   3 | yBZMgjvnmp9zmJO8 | orange


SELECT currval(pg_get_serial_sequence('fruits', 'id'));
--  currval
-- ---------
--        3
-- (1 row)