Re: Snippets? - Mailing list pgsql-general

On 5/24/19 1:27 PM, Adrian Klaver wrote:
> On 5/24/19 11:15 AM, Ken Lacrosse wrote:
>> Is there any way in postgresql to have a "snippet" of SQL code which you 
>> could apply to all tables. Something you could add which would ensure 
>> that every table always has a Created, Changed and Deleted column for 
>> example. Sort of like a C include I suppose.  Of course if I’m building a 
>> DB schema by hand I could just copy and paste those columns but it still 
>> seems a bit too, darn humans!, error prone.
>
> Not that I know of.
>
> Things I have done:
> 1) Template table that I includes those fields that I then add to.
>
> FYI the Sqitch schema management system allows you to do the above:
> https://sqitch.org/docs/manual/sqitch-add/#templates
>
> 2) A script that I run over table definition to add the fields.

What about INHERITS?

test=# create table CCD_template (
test(#  Created timestamptz,
test(#  Changed timestamptz,
test(#  Deleted timestamptz );
CREATE TABLE

test=# create table foobar (
   field1 integer,
   field2 bytea
) inherits (CCD_template);
CREATE TABLE
test=#
test=# \d foobar
              Table "public.foobar"
  Column  |           Type           | Modifiers
---------+--------------------------+-----------
  created | timestamp with time zone |
  changed | timestamp with time zone |
  deleted | timestamp with time zone |
  field1  | integer                  |
  field2  | bytea                    |
Inherits: ccd_template


>
>>
>> Ken LaCrosse
>>
>> Senior IT InfoSec and Infrastructure Monitoring Specialist
>>
>> I.T. | American Recovery Service & Skipbusters
>>
>> Phone: (800)398-6480 x3758
>>
>> Email: KLacrosse@pkwillis.com <mailto:KLacrosse@pkwillis.com>
>>
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