postgrep创建存储过程例子

Posted 2021-03-07 hxlasky

 

1.创建数据库
psql

create database db_hxl encoding = ‘utf8‘;
#c db_hxl

2.创建表
create table tb_test01
(
id bigserial primary key not null,
name varchar(32),
createtime timestamp default current_timestamp,
modifytime  timestamp default current_timestamp
);

 

3.创建存储过程

CREATE OR REPLACE FUNCTION "public"."sp_insert_data"()
  RETURNS "pg_catalog"."int4" AS $BODY$  
declare  
    total integer;
        i integer := 1;
BEGIN  
 
  while i <= 1000 loop
   insert into tb_test01(name) values(‘name‘||i);
     update tb_test01
       set name=‘更新‘ ,modifytime=now()
      where id=ceil(random()*(10000-1)+1);
     i=i+1;
  end loop;

   RETURN 1;  
END;  
$BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100

 

4.创建crontab 调度
[postgres@localhost scripts]$ crontab -l
##pg生成测试数据
*/30 * * * * /home/postgres/scripts/insert_data.sh 1>/dev/null 2>&1

[postgres@localhost scripts]$ more insert_data.sh
#!/bin/bash
. /etc/profile
. ~/.bash_profile
echo a>>/tmp/a.txt
psql -U postgres -h localhost -d db_hxl << EOF
select sp_insert_data();
EOF