Question

I am trying to grow a database using the following the code below. However I get the following error. How do I check for size (3600MB) and grow it if necessary?

USING MyDatabase  ALTER DATABASE MyDatabase MODIFY FILE (NAME =  MyDatabase_data, SIZE = 3600MB) 

Error: MODIFY FILE failed. Specified size is less than or equal to current size.

UPDATE: I am not using Auto Grow due to the heavy traffic. Due to the setup I have here (long unrelated story) I need to make the change using code. However, if this code runs more than once I get the error described above. I need to check the size first before attempting the change again.

Answer 1

The size of the DB will be shown by

USE MyDatabase EXEC sp_spaceused 

looking at the code for sp_spaceused (I happen to be looking at a SQL 2000 server, but same/similar would be true for SQL2005 / SQL2008)

USE master EXEC sp_helptext 'sp_spaceused' 

and the relevant code is:

declare @dbsize dec(15,0) declare @logsize dec(15) declare @bytesperpage   dec(15,0) declare @pagesperMB     dec(15,0)      select @dbsize = sum(convert(dec(15),size))         from dbo.sysfiles         where (status & 64 = 0)      select @logsize = sum(convert(dec(15),size))         from dbo.sysfiles         where (status & 64 <> 0)      select @bytesperpage = low         from master.dbo.spt_values         where number = 1             and type = 'E'     select @pagesperMB = 1048576 / @bytesperpage      select  database_name = db_name(),         database_size =             ltrim(str((@dbsize + @logsize) / @pagesperMB,15,2) + ' MB') 

so from that you could save the size to a variable and compare again the size you were trying to set:

DECLARE @database_size bigint SELECT  @database_size = (@dbsize + @logsize) / @pagesperMB IF @database_size < 3600 BEGIN     PRINT 'Expanding MyDatabase ...'     ALTER DATABASE MyDatabase     MODIFY FILE (NAME =  MyDatabase_data, SIZE = 3600MB)     PRINT 'Expanding MyDatabase DONE' END ELSE BEGIN     PRINT 'No expansion of MyDatabase required' END