这篇文章主要介绍了sql脚本函数编写postgresql数据库实现解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
postgresql创建Long自增函数
CREATE SEQUENCE global_id_sequence;
CREATE OR REPLACE FUNCTION seq_id(OUT result bigint) AS $$
DECLARE
our_epoch bigint := 1314220021721;
seq_id bigint;
now_millis bigint;
-- the id of this DB shard, must be set for each
-- schema shard you have - you could pass this as a parameter too
shard_id int := 1;
BEGIN
SELECT nextval('global_id_sequence') % 1024 INTO seq_id;
SELECT FLOOR(EXTRACT(EPOCH FROM clock_timestamp()) * 1000) INTO now_millis;
result := (now_millis - our_epoch) << 23;
result := result | (shard_id << 10);
result := result | (seq_id);
END;
$$ LANGUAGE PLPGSQL;
<!--alter function seq_id(out bigint) owner to postgres;-->
创建sql脚本postgresql
do language plpgsql $$ begin update grade set grade = 90 where sno = '20161003'; end $$
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
