A view needs at least one column whereas a table doesn't...

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От	Gurjeet Singh
Тема	A view needs at least one column whereas a table doesn't...
Дата	13 февраля 2007 г. 11:59:47
Msg-id	65937bea0702130759g750436bbhb244bc9fd5ec343f@mail.gmail.com обсуждение
Ответы	Re: A view needs at least one column whereas a table doesn't...
Список	pgsql-general

Дерево обсуждения

The first SQL command throws an error whereas the second one runs fine:

edb=# create schema s1 authorization u1
edb-# create table t1() create view v1 as select * from t1;
ERROR: view must have at least one column
edb=#
edb=# create schema s1 authorization u1
edb-# create table t1( c1 int ) create view v1 as select * from t1;
CREATE SCHEMA
edb=#

I know the ERROR seems obvious, but then if we allow zero-column tables, then why not zero-column views?

Or should the question be, why do we allow zero-column tables? (is inheritance the only reason?)

Can someone provide some explanation for this behaviour?

Best regards,

--
gurjeet[.singh]@EnterpriseDB.com
singh.gurjeet@{ gmail | hotmail | yahoo }.com
17°29'34.37"N 78°30'59.76"E

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A view needs at least one column whereas a table doesn't...