PostgreSQL定时清理旧数据的实现方法

pgadmin: 
    container_name: pgadmin4_container 
    image: dpage/pgadmin4 
    restart: always 
    environment: 
        PGADMIN_DEFAULT_EMAIL: <admin@admin.com> PGADMIN_DEFAULT_PASSWORD: root 
    ports: - "5050:80"

docker-compose up -d

CREATE OR REPLACE FUNCTION delete_old_data() RETURNS void AS $$
DECLARE
tbl_name record;
table_date date;
BEGIN
FOR tbl_name IN SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' AND table_name LIKE 'position_record_%' AND table_name ~ '\d{8}' LOOP
table_date := to_date(substring(tbl_name.table_name from '\d{8}'), 'YYYYMMDD');
IF table_date < current_date - 30 THEN
EXECUTE format('DROP TABLE IF EXISTS public.%I', tbl_name.table_name);
END IF;
END LOOP;
END;
$$ LANGUAGE plpgsql;

docker-compose exec pgsql bash # 进入容器
apt-get update # 更新源
apt install vim # 安装vim工具
vim /etc/apt/sources.list # 进入系统源配置文件把原来的注释了添加

deb <http://mirrors.aliyun.com/debian/> bullseye main deb 
<http://mirrors.aliyun.com/debian-security> bullseye-security main deb 
<http://mirrors.aliyun.com/debian> bullseye-updates main
# 修改成国内源

apt-get update
apt install pgagent # 安装pgagent
psql -U postgres -h localhost # 创建db扩展
CREATE EXTENSION pgagent; 
\q 
exit
# 在postgres数据库上启用pgagent:
pgagent hostaddr=127.0.0.1 dbname=postgres user=postgres password=***** 
# 和你的docker-conpose保持一致就好

SELECT delete_old_data();