Re: Windowing Function Patch Review -> Standard Conformance
От | David Rowley |
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Тема | Re: Windowing Function Patch Review -> Standard Conformance |
Дата | |
Msg-id | E1304A0E35F34CB080A83F60AD9B71EF@amd64 обсуждение исходный текст |
Ответ на | Re: Windowing Function Patch Review -> Standard Conformance ("Hitoshi Harada" <umi.tanuki@gmail.com>) |
Ответы |
Re: Windowing Function Patch Review -> Standard Conformance
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Список | pgsql-hackers |
Using one of my original test tables I'm testing windowing functions with a GROUP BY. The following query works as I would expect. -- Works SELECT department, SUM(Salary), ROW_NUMBER() OVER (ORDER BY department), SUM(SUM(salary)) OVER (ORDER BY department) FROM employees GROUP BY department; The following one fails with the message. ERROR: variable not found in subplan target list -- Does not work. SELECT department, SUM(Salary), ROW_NUMBER() OVER (ORDER BY department), SUM(SUM(salary)) OVER (ORDER BY departmentDESC) FROM employees GROUP BY department; I just added the DESC to force it into creating 2 separate windows. I can re-write the non working query to work using the following: SELECT department, salary, ROW_NUMBER() OVER (ORDER BY department), SUM(salary) OVER (ORDER BY departmentDESC) FROM (SELECT department, SUM(salary) AS salary FROM employees GROUP BY department ) t; Testing with: create table employees ( id INT primary key, name varchar(30) not null, department varchar(30) not null, salary int not null,check (salary >= 0) ); insert into employees values(1,'Jeff','IT',10000); insert into employees values(2,'Sam','IT',12000); insert into employees values(3,'Richard','Manager',30000); insert into employees values(4,'Ian','Manager',20000); insert into employees values(5,'John','IT',60000); insert into employees values(6,'Matthew','Director',60000);
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