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

0 vote199 views1 answer
Sql server update top n records
SQL
3 votes210 views2 answers
Sqlite show table structure
SQL
0 vote220 views1 answer
In query in sql
SQL
0 vote295 views1 answer
Add user mysql wordpress
SQL
1 vote202 views2 answers
Sql drop multiple columns if exists
SQL
0 vote190 views1 answer
Group_concat only returns one row
SQL
59 votes7.7K views6 answers
Alter table sql
SQL
0 vote211 views1 answer
SQLSTATE[42000]: Syntax error or access violation: 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause
SQL
0 vote181 views1 answer
Get records in sql according to month name and count
SQL
11 votes192 views2 answers
Oracle source code
SQL