TODO item: Have psql show current values for a sequence

Hi all,

These patch implements the TODO item: Have psql show current values
for a sequence.
Comments are welcome.

* Credits

The original patch were developed by Euler Taveira de Oliveira
<euler(at)timbira(dot)com>
but how he is a little busy, he sends it to me and I made some changes
to satisfy
the TODO item above.

* Discussions

http://archives.postgresql.org/pgsql-hackers/2007-12/msg00102.php
http://archives.postgresql.org/pgsql-hackers/2007-12/msg00605.php

* Outputs

# \d foo_bar_seq
Sequence "public.foo_bar_seq"
+---------------+---------+---------------------+
| Column | Type | Value |
+---------------+---------+---------------------+
| sequence_name | name | foo_bar_seq |
| last_value | bigint | 11 |
| start_value | bigint | 1 |
| increment_by | bigint | 1 |
| max_value | bigint | 9223372036854775807 |
| min_value | bigint | 1 |
| cache_value | bigint | 1 |
| log_cnt | bigint | 31 |
| is_cycled | boolean | f |
| is_called | boolean | t |
+---------------+---------+---------------------+

# \d+ foo_bar_seq
Sequence "public.foo_bar_seq"
+---------------+---------+---------------------+-------------+
| Column | Type | Value | Description |
+---------------+---------+---------------------+-------------+
| sequence_name | name | foo_bar_seq | |
| last_value | bigint | 11 | |
| start_value | bigint | 1 | |
| increment_by | bigint | 1 | |
| max_value | bigint | 9223372036854775807 | |
| min_value | bigint | 1 | |
| cache_value | bigint | 1 | |
| log_cnt | bigint | 31 | |
| is_cycled | boolean | f | |
| is_called | boolean | t | |
+---------------+---------+---------------------+-------------+

--
[]s
Dickson S. Guedes
--------------------------------------
Projeto Colmeia - Curitiba - PR
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