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help / color / mirror / Atom feedFrom: Celia McInnis <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: adding a generated column to a table?
Date: Mon, 22 Apr 2024 12:05:39 -0400
Message-ID: <CAGD6t7L3W=ftbvkrWRHwAAT0SAwdC0AWiw7oek7hRWMrBU9dUQ@mail.gmail.com> (raw)
If I have a table containing a date field, say:
create temporary table tmp1 as select now()::date as evtdate;
SELECT 1
select DATE_PART('year', evtdate)::integer as year from tmp1;
year
------
2024
(1 row)
Is there some way of doing something like the following?:
alter table tmp1 add column year integer generated always as
DATE_PART('year', evtdate)::integer STORED;
ERROR: syntax error at or near "DATE_PART"
LINE 1: ... tmp1 add column year integer generated always as DATE_PART(...
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Subject: Re: adding a generated column to a table?
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