Re: psql's describe command (for sequences) output improvement - Mailing list pgsql-hackers

From Aftab Hussain
Subject Re: psql's describe command (for sequences) output improvement
Date
Msg-id 1fe1c5a10712050031q660ffd72u951e8fced66042ad@mail.gmail.com
Whole thread Raw
In response to Re: psql's describe command (for sequences) output improvement  ("Peter Childs" <peterachilds@gmail.com>)
Responses Re: psql's describe command (for sequences) output improvement  (Bruce Momjian <bruce@momjian.us>)
List pgsql-hackers


On Dec 4, 2007 7:47 PM, Peter Childs <peterachilds@gmail.com> wrote:


On 04/12/2007, Aftab Hussain <aftab.hussain@enterprisedb.com> wrote:

Hi all,

I have a patch which tries to improve the '\d some_sequence_name' command output in psql utility. Before sending the patch to pgsql-patches I just want to know your opinion whether the new output of the command is OK or it needs to be modified before sending it to pgsql-patches.

For comparison purpose, here is the output of the '\d some_sequence_name' command:

-- Say we have created a sequence named 'test_seq' already as CREATE SEQUENCE test_seq.

--
-- Output: before applying the patch.
--
testdb=# \d test_seq;
Sequence "public.test_seq"
    Column     |  Type  
---------------+---------
 sequence_name | name
 last_value    | bigint
 increment_by  | bigint
 max_value     | bigint
 min_value     | bigint
 cache_value   | bigint
 log_cnt       | bigint
 is_cycled     | boolean
 is_called     | boolean

--
-- Output: after applying the patch.
--
testdb=# \d test_seq;
                                  Sequence "public.test_seq"
 last_value | increment_by |      max_value      | min_value | cache_value | log_cnt | is_cycled | is_called
------------+--------------+---------------------+-----------+-------------+---------+-----------+-----------
 1          | 1            | 9223372036854775807 | 1         | 1           | 1       | f         | f



Thanks in advance for your feedback(s).

--
Aftab.

Why?

is that not what

select * from test_seq;

does already.


\d command return meta data not data.

Peter Childs

In general, \d command is working perfectly for database objects.

For sequences, I think the current \d some_sequence command's output is displaying information which does not help the end user very much. Also isn't the newly display information (same as information provided by 'select * from test_seq;' statement) is/can-be-considered the metadata information about the sequences queried about (since for the returning sequences data we have nextval('...'), currval('...') functions)?

Please correct me if I am wrong or have missed something.

Aftab Hussain.
EnterpriseDB.   www.enterprisedb.com

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