but if you have to do for many tables, this method still works but not a good idea. I then specify a trigger to run on the staging table table that after an insert succeeds, the record is transferred into the actual table with the index. I would personally follow my both the comments above and will not use identity columns for any display purpose or will not depend on sequence of it. Download 'sp_identity' Download sp_identity from here. have a peek at this web-site
What "identity gaps" look like To illustrate the problems related to identity gaps, lets assume the following simplified database design for storing invoice data: create table invoices (invoice_nr numeric(10,0) identity, customer_nr So what about the two-table design technique described in the original magazine article above ? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I'm not able to give you a solution fir this, but this is the behavior. imp source
There are several others and some depend on version. DBAs should be aware of this, and be prepared to perform recovery procedures. Identity gaps are large, sudden jumps in the value of an identity column, which often cause problems for applications. Note that dropping the table will implicitly switch off the identity_insert option.
object_atts:get:return value=1 0207E20C: 0001c6bf 52634001 00000000 00000000 [email protected] 0207E21C: . Also, identity gaps can still occur in this design, with the same consequences for the application as before. Sci-Fi movie, about binary code, aliens, and headaches When referring to weekdays Can I switch between two users in a single click? Identity Burning Set Factor Miscellaneous tools Blog @ sap.com Old Stuff sp_license Query filter New features in 22.214.171.124 ASE Replicator ASIQ QuickRef(free) RepServer QuickRef(free) Hist.
If values must be consecutive then the transaction should use an exclusive lock on the table or use the SERIALIZABLE isolation level.Consecutive values after server restart or other failures –SQL Server Can an umlaut be written as line (when writing by hand)? Fixing "identity gaps" the slow, classical way Lets assume that, once an identity gap has occurred, it should be repaired as soon as possible. http://www.sypron.nl/idfix.html In case an identity gap is found, the DBA just needs to execute this procedure and the problem will be fixed automatically.
share|improve this answer answered Mar 30 '15 at 23:45 Jeyara 1112 add a comment| Not the answer you're looking for? Sql Server Identity Fill Gaps This article presents a database design technique that allows identity gaps to be fixed easily and quickly, taking no more than a few seconds. Identity Gap = 500000000000000 ("identity burning set factor" = 5000 = 0.05%) Reading identity value from OAM page... If a particular insert statement fails or if the insert statement is rolled back then the consumed identity values are lost and will not be generated again.
If records are deleted SQL Server won't go back and populate using those values. Exactly at which higher value the server picks up, is determined by the configuration parameter "identity burning set factor", which, to a certain extent, can be used to limit the maximum Sql Server 2012 Auto Identity Column Value Jump Issue There are many scenarios that can leave gaps. Sql Server 2014 Auto Identity Column Value Jump Issue It should be noted here that it is always possible that some individual identity column values are missing.
To create a new table with a maximum identity gap of 10: create table tab_1 (column datatype,...) with identity_gap = 10 or: select ... When a new invoice is created, the customer number and the amount payable are inserted into the invoices table. SQL-Server 2012 is known to have these 1000 or bigger gaps: Connect item: Failover or Restart Results in Reseed of Identity –ypercubeᵀᴹ Mar 31 '14 at 13:00 3 Related connect Source you wanna be a DBA?
You can do that like this -- Cleanup DECLARE @ID INT SELECT @ID = MAX(ID) FROM #Sample DBCC CHECKIDENT(#Sample, RESEED, @ID) DROP TABLE #Sample, #Aux, #Trans Remember to put this piece Identity_burn_max However, once this happens, this new approach offers a much better way to repair the identity gap. Most identity columns I see are specified as IDENTITY(1,1) but I used IDENTITY(7,2) so the difference would be clear.
Setting the seed or increment to a value other than 1 results in the following error: The use of seed and increment values other than 1 is not supported with memory Drop and re-create invoices_keytable . Ultimately, use a bigint instead of int if you're really concerned. –Remus Rusanu Feb 1 '13 at 8:17 2 @user2024475: no it's not: sqlfiddle.com/#!2/040fb/1 –a_horse_with_no_name Feb 1 '13 at 8:18 Sp_chgattribute There might be some other reasons for this id gaps, it may be due to automatic server restart after installing an update.
Note that this check will cause one invoice number value to be missing from invoices , in case no identity gap exists. But, when I insert a new row, this new id is not consecutive. If those answers do not fully address your question, please ask a new question. 1 If you care about the numerical values assigned to an identity column, you're doing something Tips & Tricks Sproc results in a table User-defined SQL functions Identity gaps CIS & XP tricks Granting SA-commands to non-SA users Tricks with 'sqsh' Simulating dynamic SQL(1) Simulating dynamic SQL(2)
Proactive reparation of identity gaps Designing a database to allow quick reparation of identity gaps is a major improvement compared to the "classical" situation. For control manager shutdown, we have a fix for next verion (with another TF). In the above example, 5000002 and 5000003 should be changed to 10032 and 10033, respectively. But that might break schemas and you also may need to rewrite a number of stored procedures and rebuilding indexes.
Quick Intro to ASE What is Sybase ASE ? share|improve this answer edited Jul 26 at 15:43 answered Jul 11 '13 at 10:55 bonitzenator 1851114 Just in case anyone else is reading this, the Microsoft page (linked in more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed