On 12/9/2011 4:57 PM, David Johnston wrote:
Functions are evaluated once for each row that it generated by the
surrounding query. This is particularly useful if the function in question
takes an aggregate as an input:
SELECT col1, array_processing_function( ARRAY_AGG( col2 ) )
FROM table
CREATE TABLE people(
id serial PRIMARY KEY,
name varchar NOT NULL
);
INSERT INTO people(name) VALUES('Adam'), ('Adam'), ('Adam'), ('Bill'),
('Sam'), ('Joe'), ('Joe');
SELECT name, count(*), random()
FROM people
GROUP BY name;
I would expect this query to cause an error because of
On Fri, Dec 9, 2011 at 5:48 PM, Jack Christensen ja...@hylesanderson.eduwrote:
CREATE TABLE people(
id serial PRIMARY KEY,
name varchar NOT NULL
);
INSERT INTO people(name) VALUES('Adam'), ('Adam'), ('Adam'), ('Bill'),
('Sam'), ('Joe'), ('Joe');
SELECT name, count(*), random()
FROM
-Original Message-
From: pgsql-general-ow...@postgresql.org
[mailto:pgsql-general-ow...@postgresql.org] On Behalf Of Jack Christensen
Sent: Friday, December 09, 2011 5:48 PM
To: pgsql-general@postgresql.org
Subject: [GENERAL] Why does aggregate query allow select of non-group
On 12/09/2011 02:48 PM, Jack Christensen wrote:
CREATE TABLE people(
id serial PRIMARY KEY,
name varchar NOT NULL
);
INSERT INTO people(name) VALUES('Adam'), ('Adam'), ('Adam'), ('Bill'),
('Sam'), ('Joe'), ('Joe');
SELECT name, count(*), random()
FROM people
GROUP BY name;
I would expect
