SYBASE ASE Identity column
Identity column in SYBASE .
We have identity column in production database tables and identity precision value is set to 9 . ( So I believe , identity value assignment by ASE can go till 999999999 ( 9 times 9 ) )
Can anyone explain about "Length" from the sp_help output ( What it means/says )
From below outputs while i am declaring precision as 9 for identity column it says length is "5" and for precision value "1" it says length value as 2 from "sp_help " output
Thanks in advance
1> create table john4 (john_id numeric(9,0) identity,
2> name char(10) not null)
3> go
1> sp_help john4
2> go
Name Owner Object_type Create_date
----- ----- ----------- -------------------
john4 dbo user table Jul 28 2016 7:14PM
(1 row affected)
Column_name Type Length Prec Scale Nulls Default_name Rule_name Access_Rule_name Computed_Column_object Identity
----------- ------- ------ ---- ----- ----- ------------ --------- ---------------- ---------------------- ----------
john_id numeric 5 9 0 0 NULL NULL NULL NULL 1
name char 10 NULL NULL 0 NULL NULL NULL NULL 0
Object does not have any indexes.
No defined keys for this object.
name type partition_type partitions partition_keys
----- ---------- -------------- ---------- --------------
john4 base table roundrobin 1 NULL
partition_name partition_id pages row_count segment create_date
--------------- ------------ ----- --------- ------- -------------------
john4_960003420 960003420 1 0 default Jul 28 2016 7:14PM
Partition_Conditions
--------------------
NULL
Avg_pages Max_pages Min_pages Ratio(Max/Avg) Ratio(Min/Avg)
----------- ----------- ----------- --------------------------- ---------------------------
1 1 1 1.000000 1.000000
Lock scheme Datarows
The 'ascinserts' attribute is not applicable to tables with datarow or datapage lock schemes.
exp_row_size reservepagegap fillfactor max_rows_per_page identity_gap ascinserts
------------ -------------- ---------- ----------------- ------------ -----------
1 0 0 0 0 0
(1 row affected)
concurrency_opt_threshold optimistic_index_lock dealloc_first_txtpg
------------------------- --------------------- -------------------
15 0 0
(return status = 0)
1> create table john5 (john_id numeric(1,0) identity,
2> name char(10) not null)
3> go
1> sp_help john5
2> go
Name Owner Object_type Create_date
----- ----- ----------- -------------------
john5 dbo user table Jul 28 2016 7:15PM
(1 row affected)
Column_name Type Length Prec Scale Nulls Default_name Rule_name Access_Rule_name Computed_Column_object Identity
----------- ------- ------ ---- ----- ----- ------------ --------- ---------------- ---------------------- ----------
john_id numeric 2 1 0 0 NULL NULL NULL NULL 1
name char 10 NULL NULL 0 NULL NULL NULL NULL 0
Object does not have any indexes.
No defined keys for this object.
name type partition_type partitions partition_keys
----- ---------- -------------- ---------- --------------
john5 base table roundrobin 1 NULL
partition_name partition_id pages row_count segment create_date
--------------- ------------ ----- --------- ------- -------------------
john5_992003534 992003534 1 0 default Jul 28 2016 7:15PM
Partition_Conditions
--------------------
NULL
Avg_pages Max_pages Min_pages Ratio(Max/Avg) Ratio(Min/Avg)
----------- ----------- ----------- --------------------------- ---------------------------
1 1 1 1.000000 1.000000
Lock scheme Datarows
The 'ascinserts' attribute is not applicable to tables with datarow or datapage lock schemes.
exp_row_size reservepagegap fillfactor max_rows_per_page identity_gap ascinserts
------------ -------------- ---------- ----------------- ------------ -----------
1 0 0 0 0 0
(1 row affected)
concurrency_opt_threshold optimistic_index_lock dealloc_first_txtpg
------------------------- --------------------- -------------------
15 0 0
(return status = 0)
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