Обсуждение: BUG #2849: Erroronous UPDATE syntax in documentation

The following bug has been logged online:

Bug reference:      2849
Logged by:          Gurjeet Singh
Email address:      singh.gurjeet@gmail.com
PostgreSQL version: 8.2.0
Operating system:   Windows
Description:        Erroronous UPDATE syntax  in documentation
Details:

The documentation at

http://www.postgresql.org/docs/8.2/interactive/rules-views.html#AEN38727

illustrates the examples using wrong syntax of UPDATE command. The FROM
clause is missing; if the FROM clause and the appropriate table is added to
the query, it works fine.

Sample session:

postgres=# create table t1( a int, b int );
CREATE TABLE
postgres=# create table t2( a int, b int );
CREATE TABLE
postgres=# update t1 set b = t2.b where t1.a = t2.a;
ERROR:  missing FROM-clause entry for table "t2"
LINE 1: update t1 set b = t2.b where t1.a = t2.a;
                          ^
postgres=# update t1 set b = t2.b from t2 where t1.a = t2.a;
UPDATE 0
postgres=#

On 12/21/06, Gurjeet Singh <singh.gurjeet@gmail.com> wrote:
>
>
> The following bug has been logged online:
>
> Bug reference:      2849
> Logged by:          Gurjeet Singh
> Email address:      singh.gurjeet@gmail.com
> PostgreSQL version: 8.2.0
> Operating system:   Windows
> Description:        Erroronous UPDATE syntax  in documentation


*** Erroneous  ***



--
gurjeet[.singh]@EnterpriseDB.com
singh.gurjeet@{ gmail | hotmail | yahoo }.com

"Gurjeet Singh" <singh.gurjeet@gmail.com> writes:
> http://www.postgresql.org/docs/8.2/interactive/rules-views.html#AEN38727
> illustrates the examples using wrong syntax of UPDATE command. The FROM
> clause is missing; if the FROM clause and the appropriate table is added to
> the query, it works fine.

Well, it used to be right ;-) ... but yeah, now that add_missing_from
defaults to off we should adjust the examples.  Done, thanks for the
report.

            regards, tom lane