我想为select和changed me数据创建一个函数
CREATE OR REPLACE FUNCTION PublicatedTask( argument ) RETURNS SETOF task AS $$DECLARE
f task%ROWTYPE;
BEGIN
FOR f IN SELECT * FROM Task where layer IN $1 and publicationin<>0 ORDER BY id LOOP
if (f.publicationIN = 1) then
f.description='';
end if;
RETURN NEXT f;
END LOOP;
RETURN;
END;
$$
LANGUAGE 'plpgsql';
但我不知道什么样的论点?
我想做
SELECT * FROM PublicatedTask((1,2,3));
谢谢你的帮助
最佳答案
或使用VARIADIC
:
CREATE OR REPLACE FUNCTION PublicatedTask( VARIADIC argument int[]) RETURNS SETOF task AS $$DECLARE
f task%ROWTYPE;
BEGIN
FOR f IN SELECT * FROM Task where layer = ANY($1) and publicationin<>0 ORDER BY id LOOP
if (f.publicationIN = 1) then
f.description='';
end if;
RETURN NEXT f;
END LOOP;
RETURN;
END;
$$
LANGUAGE 'plpgsql';
用这种方式:
SELECT * FROM PublicatedTask(1,2,3);
VARIADIC
从8.4版起提供:http://www.postgresql.org/docs/8.4/interactive/xfunc-sql.html#XFUNC-SQL-VARIADIC-FUNCTIONS