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 vote186 views2 answers
Disallowed function mysql to_date()
SQL
0 vote179 views1 answer
How to start my sql server on mac
SQL
0 vote204 views1 answer
Sql query to return field name of a table
SQL
0 vote202 views1 answer
No suitable driver found for sqlite
SQL
0 vote240 views1 answer
Postgresql create table default value timestamp
SQL
0 vote290 views1 answer
Mysql grant access to one database
SQL
5 votes190 views3 answers
Oracle first day of last year
SQL
0 vote207 views1 answer
Format the money fied with comma in international system using sql
SQL
0 vote192 views1 answer
How to create a new shema using query languaage
SQL
0 vote160 views1 answer
Oracle sql replace string in clob
SQL