Primary key id reaching limit of bigint data type

Question

I have a table that is exposed to large inserts and deletes on a regular basis (and because of this there are large gaps in the number sequence of the primary id column). It

Answer 1

maybe it's bit too late, but you can add trigger in DELETE,

here is sample code in SQL SERVER

CREATE TRIGGER resetidentity
    ON dbo.[table_name]
    FOR DELETE
AS
    DECLARE @MaxID INT
    SELECT @MaxID = ISNULL(MAX(ID),0)
    FROM dbo.[table_name]
    DBCC CHECKIDENT('table_name', RESEED, @MaxID)
GO

In a nutshell, this will reset you ID (in case it is auto increment and primary). Ex: if you have 800 rows and deleted last 400 of them, next time you insert, it will start at 401 instead of 801.

But the down is it will not rearrange your ID if you delete it on the middle record.EX if you have 800 rows and deleted ID 200-400, ID still count at 801 next time you write new row(s)