创建序列
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7
8
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CREATE SEQUENCE if not exists test_mergetable_id_seq
INCREMENT 1
MINVALUE 1
MAXVALUE 999999999
START 1
CACHE 1;
//或者:
create sequence if not exists test_mergetable_id_seq increment by 1 minvalue 1 no maxvalue start with 1;
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指定序列(给表的主键指定创建好的序列)
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alter table test_mergetable alter column "i_id" set default nextval( 'test_mergetable_id_seq' );
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设置序列自增长从当前最大值开始
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SELECT setval( 'test_mergetable_id_seq' , ( SELECT MAX (i_id) FROM test_mergetable));
alter sequence test_mergetable_id_seq start with 12;
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删除序列
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drop sequence IF EXISTS test_mergetable_id_seq
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查看序列
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SELECT nextval( 'test_mergetable_id_seq' )
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补充:pgsql的schema对用户授权,单个用户跨schema增删改查操作
--创建用户
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create user user1;
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--修改密码
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alter user report with password 'password' ;
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--授权查询权限
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grant usage on schema schema1 to user1;
grant usage on schema schema2 to user1;
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修改search_path可跨schema操作
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set search_path = "$user" ,user1,user2
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--授权schema:schema1给user1权限 这个权限太大需要慎用
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grant all on schema schema1 to user1;
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--授权schema的表权限给user1 用户权限太多需慎用
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grant all on all tables in schema schema1 to user1;
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--授权schema的表权限给user1 用户权限太多需慎用
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grant all on all tables in schema schema1 to user1;
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--授权某个schema的单个表查权限
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grant select on schema2.table1 to user1;
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--收回所有授权
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revoke all on all tables in schema schema1 from user1;
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--为某个特定用户设置search_path
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alter user user1 set search_path= "$user" ,user1,user2;
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以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。如有错误或未考虑完全的地方,望不吝赐教。
原文链接:https://blog.csdn.net/fangyu723/article/details/105297255