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
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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
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do language plpgsql$$beginupdate grade set grade = 90 where sno = '20161003';end$$ |
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原文链接：https://www.cnblogs.com/ltspring/p/11508636.html
