Обсуждение: Error in sample on doc page

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/13/functions-event-triggers.html
Description:

https://www.postgresql.org/docs/13/functions-event-triggers.html

Two issues here: 
1) The CREATE EVENT TRIGGER command in the sample code does not execute (see
output below)
2) When executed in an anonymous do block, there is no error. The CREATE
EVENT TRIGGER executed outside the do block should have given an error
saying already exists. Instead it gives the error: "ERROR: syntax error at
end of input".

ae_lake.cdc> do $docbug$
             BEGIN
               RAISE INFO 'Executing sample from PG docs:
https://www.postgresql.org/docs/13/functions-event-triggers.html...';
               
               CREATE FUNCTION test_event_trigger_table_rewrite_oid()
                RETURNS event_trigger
                LANGUAGE plpgsql AS
               $$
               BEGIN
                 RAISE NOTICE 'rewriting table % for reason %',

pg_event_trigger_table_rewrite_oid()::regclass,
                               pg_event_trigger_table_rewrite_reason();
               END;
               $$;
               
               CREATE EVENT TRIGGER test_table_rewrite_oid
                               ON table_rewrite
                EXECUTE FUNCTION test_event_trigger_table_rewrite_oid();
             
             END;
             $docbug$
[2021-11-14 22:47:49] [00000] Executing sample from PG docs:
https://www.postgresql.org/docs/13/functions-event-triggers.html...
[2021-11-14 22:47:49] completed in 109 ms
ae_lake.cdc> CREATE EVENT TRIGGER test_table_rewrite_oid
                               ON table_rewrite
[2021-11-14 22:48:09] [42601] ERROR: syntax error at end of input
[2021-11-14 22:48:09] Position: 79

Disregard. This was an IDE issue.

On 11/14/21 10:52 PM, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/13/functions-event-triggers.html
> Description:
>
> https://www.postgresql.org/docs/13/functions-event-triggers.html
>
> Two issues here:
> 1) The CREATE EVENT TRIGGER command in the sample code does not execute (see
> output below)
> 2) When executed in an anonymous do block, there is no error. The CREATE
> EVENT TRIGGER executed outside the do block should have given an error
> saying already exists. Instead it gives the error: "ERROR: syntax error at
> end of input".
>
> ae_lake.cdc> do $docbug$
>               BEGIN
>                 RAISE INFO 'Executing sample from PG docs:
> https://www.postgresql.org/docs/13/functions-event-triggers.html...';
>                 
>                 CREATE FUNCTION test_event_trigger_table_rewrite_oid()
>                  RETURNS event_trigger
>                  LANGUAGE plpgsql AS
>                 $$
>                 BEGIN
>                   RAISE NOTICE 'rewriting table % for reason %',
>                                
> pg_event_trigger_table_rewrite_oid()::regclass,
>                                 pg_event_trigger_table_rewrite_reason();
>                 END;
>                 $$;
>                 
>                 CREATE EVENT TRIGGER test_table_rewrite_oid
>                                 ON table_rewrite
>                  EXECUTE FUNCTION test_event_trigger_table_rewrite_oid();
>               
>               END;
>               $docbug$
> [2021-11-14 22:47:49] [00000] Executing sample from PG docs:
> https://www.postgresql.org/docs/13/functions-event-triggers.html...
> [2021-11-14 22:47:49] completed in 109 ms
> ae_lake.cdc> CREATE EVENT TRIGGER test_table_rewrite_oid
>                                 ON table_rewrite
> [2021-11-14 22:48:09] [42601] ERROR: syntax error at end of input
> [2021-11-14 22:48:09] Position: 79

On Mon, 2021-11-15 at 05:52 +0000, PG Doc comments form wrote:
> Two issues here: 
> 1) The CREATE EVENT TRIGGER command in the sample code does not execute (see
> output below)

It works just fine for me.

> 2) When executed in an anonymous do block, there is no error. The CREATE
> EVENT TRIGGER executed outside the do block should have given an error
> saying already exists. Instead it gives the error: "ERROR: syntax error at
> end of input".
> 
> ae_lake.cdc> do $docbug$
>              BEGIN
>                RAISE INFO 'Executing sample from PG docs:
> https://www.postgresql.org/docs/13/functions-event-triggers.html...';
>                
>                CREATE FUNCTION test_event_trigger_table_rewrite_oid()
>                 RETURNS event_trigger
>                 LANGUAGE plpgsql AS
>                $$
>                BEGIN
>                  RAISE NOTICE 'rewriting table % for reason %',
>                               
> pg_event_trigger_table_rewrite_oid()::regclass,
>                                pg_event_trigger_table_rewrite_reason();
>                END;
>                $$;
>                
>                CREATE EVENT TRIGGER test_table_rewrite_oid
>                                ON table_rewrite
>                 EXECUTE FUNCTION test_event_trigger_table_rewrite_oid();
>              
>              END;
>              $docbug$
> [2021-11-14 22:47:49] [00000] Executing sample from PG docs:
> https://www.postgresql.org/docs/13/functions-event-triggers.html...
> [2021-11-14 22:47:49] completed in 109 ms
> ae_lake.cdc> CREATE EVENT TRIGGER test_table_rewrite_oid
>                                ON table_rewrite
> [2021-11-14 22:48:09] [42601] ERROR: syntax error at end of input
> [2021-11-14 22:48:09] Position: 79

I don't get that error.

Perhaps you inadvertently were on a continuation line in psql.

Yours,
Laurenz Albe