Thank you Holger and David, the error was the missing clausule STORED
The timecreated data type is Int8
King regards
Mauricio Fernández
El mié, 3 sept 2025 a las 13:46, Holger Jakobs (<holger@xxxxxxxxxx>) escribió:
Am 03.09.25 um 17:50 schrieb Mauricio Fernandez:
> Hi admins, greetings.
>
> I'm trying to add a timestamp column in an existent table.
>
> This query works fine:
>
> select timecreated, timezone('America/Santiago'::text,
> to_timestamp(timecreated::double precision)) datecreated
> from MDL_LOGSTORE_STANDARD_LOG;
>
> But, when I want to alter the table I get a syntax error
>
> alter table MDL_LOGSTORE_STANDARD_LOG
> add column datecreated timestamp
> generated always as ( timezone ('America/Santiago'::text,
> to_timestamp(timecreated::double precision)));
>
> SQL Error [42601]: ERROR: syntax error at end of input
> Position: 185
>
> I would appreciate some tips
>
> Thanks in advanced
>
> kind regards
>
> Mauricio Fernández
Instead of
alter table MDL_LOGSTORE_STANDARD_LOG
add column datecreated timestamp
generated always as ( timezone ('America/Santiago'::text,
to_timestamp(timecreated::double precision)));
I would suggest
ALTER TABLE MDL_LOGSTORE_STANDARD_LOG
ADD COLUMN datecreated TIMESTAMP
GENERATED ALWAYS AS (timecreated AT TIME ZONE 'America/Santiago') STORED;
You didn't tell us the data type of the column timecreated. It should be
'TIMESTAMPTZ DEFAULT current_timestamp' for it to work properly.
As of Version 18 you can leave out STORED, creating a virtual generated
column.
Kind Regards,
Holger
--
Holger Jakobs, Bergisch Gladbach
