Postgres row expiration

CREATE TABLE expire_table (
    timestamp timestamp NOT NULL DEFAULT NOW(),
    name TEXT NOT NULL
);

INSERT INTO expire_table (name) VALUES ('a');
INSERT INTO expire_table (name) VALUES ('b');
INSERT INTO expire_table (name) VALUES ('c');

select * from expire_table;
         timestamp          | name 
----------------------------+------
 2014-09-26 15:33:43.243356 | a
 2014-09-26 15:33:45.222202 | b
 2014-09-26 15:33:47.347131 | c
(3 rows)

CREATE FUNCTION expire_table_delete_old_rows() RETURNS trigger
    LANGUAGE plpgsql
    AS $$
BEGIN
  DELETE FROM expire_table WHERE timestamp < NOW() - INTERVAL '1 minute';
  RETURN NEW;
END;
$$;

CREATE TRIGGER expire_table_delete_old_rows_trigger
    AFTER INSERT ON expire_table
    EXECUTE PROCEDURE expire_table_delete_old_rows();

INSERT INTO expire_table (name) VALUES ('d');

select * from expire_table;
         timestamp          | name 
----------------------------+------
 2014-09-26 15:36:56.132596 | d
(1 row)

Source: stackoverflow.com

Similar codes

2 votes286 views3 answers
Access denied for user 'root'@'localhost' mariadb
SQL
1 vote297 views1 answer
Sql week commencing date
SQL
1 vote379 views1 answer
Postgresql Insufficient privilege: 7 ERROR: permission denied for table
SQL
15 votes323 views1 answer
Mysql int range
SQL
0 vote318 views1 answer
Function sum(text) does not exist postgres
SQL
1 vote308 views1 answer
Sql server 2016 reseed identity
SQL
1 vote326 views4 answers
Aggregate function in sql
SQL
11 votes342 views5 answers
Laravel db facade
SQL
6 votes317 views1 answer
Phpmyadmin password root
SQL
0 vote310 views1 answer
Postgresql print variable
SQL