psql: Update \d sequence display
For \d sequencename, the psql code just did SELECT * FROM sequencename
to get the information to display, but this does not contain much
interesting information anymore in PostgreSQL 10, because the metadata
has been moved to a separate system catalog.
This patch creates a newly designed sequence display that is not merely
an extension of the general relation/table display as it was previously.
Example:
PostgreSQL 9.6:
=> \d foobar
Sequence "public.foobar"
Column | Type | Value
---------------+---------+---------------------
sequence_name | name | foobar
last_value | bigint | 1
start_value | bigint | 1
increment_by | bigint | 1
max_value | bigint |
9223372036854775807
min_value | bigint | 1
cache_value | bigint | 1
log_cnt | bigint | 0
is_cycled | boolean | f
is_called | boolean | f
PostgreSQL 10 before this change:
=> \d foobar
Sequence "public.foobar"
Column | Type | Value
------------+---------+-------
last_value | bigint | 1
log_cnt | bigint | 0
is_called | boolean | f
New:
=> \d foobar
Sequence "public.foobar"
Type | Start | Minimum | Maximum | Increment | Cycles? | Cache
--------+-------+---------+---------------------+-----------+---------+-------
bigint | 1 | 1 |
9223372036854775807 | 1 | no | 1
Reviewed-by: Fabien COELHO <coelho@cri.ensmp.fr>