我想在
postgresql中创建一个更新函数(存储过程),我在google上搜索了很多次,但没有找到更新函数(存储过程)的正确示例.如何在
Postgresql中编写更新函数并更改表中的现有数据?
提前致谢.
- Example of Function
- CREATE OR REPLACE FUNCTION updateuser_login(userloginidp integer,usercategoryidf integer,usertypeidf integer,usertypereferenceidf integer,loginname text,loginpassword text,menutypeidf integer,username text,dashboardconfig text,careprovideridf integer,isactive boolean)
- RETURNS void AS
- $BODY$BEGIN
- UPDATE tbuserlogin
- SET usercategoryidf="@usercategoryidf",usetypeidf="@usertypeidf",usertypereferenceidf="@usertypereferenceidf",loginname="@loginname",loginpassword="@loginpassword",menutypeidf="@menutypeidf",username="@username",dashboardconfig="@dashboardconfig",careprovideridf="@careprovideridf",isactive="@isactive"
- WHERE userloginidp = "@userloginidp";
- END$BODY$
- LANGUAGE plpgsql VOLATILE
- COST 100;
- ALTER FUNCTION updateuser_login(integer,integer,text,boolean)
- OWNER TO postgres;
您可以在PGXN网站的源代码中找到这类内容的优秀示例:
https://github.com/pgxn/pgxn-manager/tree/master/sql
- CREATE OR REPLACE FUNCTION update_user(
- nickname LABEL,full_name TEXT DEFAULT NULL,email EMAIL DEFAULT NULL,uri URI DEFAULT NULL,twitter CITEXT DEFAULT NULL
- ) RETURNS BOOLEAN LANGUAGE plpgsql SECURITY DEFINER AS $$
- /*
- % SELECT update_user(
- nickname := 'theory',full_name := 'David E. Wheeler',email := 'justatheory@pgxn.org',uri := 'http://www.justatheory.com/',twitter :- 'theory'
- );
- update_user
- ─────────────
- t
- Update the specified user. The user must be active. The nickname cannot be
- changed. The password can only be changed via `change_password()` or
- `reset_password()`. Pass other attributes as:
- full_name
- : The full name of the user.
- : The email address of the user. Must be a valid email address as verified by
- [Email::Valid](http://search.cpan.org/perldoc?Email::Valid).
- uri
- : Optional URI for the user. Should be a valid URI as verified by
- [Data::Validate::URI](http://search.cpan.org/perldoc?Data::Validate::URI).
- : Optional Twitter username. A leading "@" wil be removed.
- Returns true if the user was updated,and false if not.
- */
- BEGIN
- UPDATE users
- SET full_name = COALESCE(update_user.full_name,users.full_name),email = COALESCE(update_user.email,users.email),uri = COALESCE(update_user.uri,users.uri),twitter = COALESCE(trim(leading '@' FROM update_user.twitter),users.twitter),updated_at = NOW()
- WHERE users.nickname = update_user.nickname
- AND users.status = 'active';
- RETURN FOUND;
- END;
- $$;