USE database, but how can it check that database exists before using it

  • Hello Guys,

    I was just wondering if someone can help here, I have the code below which runs as part of a batch, but I need to make sure that the IF statement doesn’t get executed if the database does not exists.

    I know one possible solution is to wrap this around T-SQL and make it dynamic, but I was wondering if there are other ways of doing this.

    Thanks in advance.

    IF EXISTS(SELECT * FROM sysdatabases where name = 'PersonProfile')

    EXEC sp_executesql N'USE PersonProfile'

    IF db_id('PersonProfile') is not NULL

    BEGIN

    USE PersonProfile

    IF NOT EXISTS(SELECT * FROM sysusers where name = 'loginname')

    exec sp_grantdbaccess N'loginname',N'loginname'

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    GRANT EXECUTE ON XXX TO loginname

    update table set BillCode = 0 where ID <= 2000 END
    [/code]

  • Any ideas guys ?

  • select from sys.databases?

  • Steve Jones - Editor (9/15/2009)


    select from sys.databases?

    That doesnt work, even beforeit checks the sys.databases the compiler already attempts to connect to a database that might not exists, thats where the problem is.

  • Put your code into system procedure on master database and execute it like this:

    IF EXISTS(SELECT * FROM sysdatabases where name = 'PersonProfile')

    EXEC PersonProfile.dbo.sp_MyGrantPermissionProc

    If it does not work like this make it dynamic.

    _____________
    Code for TallyGenerator

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