Question

All, I have the following query

IF NOT EXISTS (SELECT name 
               FROM sys.databases 
               WHERE name = N'Report')
    BEGIN
        DECLARE @DatabasePath NVARCHAR(1000);
        SET @DatabasePath = (SELECT ResultMessage + '\' 
                             FROM [Admin]..[Process]);
        EXEC ispCREATEDB N'Report', @DatabasePath, N'10MB', N'20%'
    END
ELSE
    BEGIN 
        IF EXISTS (SELECT *  
                   FROM Report.sys.objects 
                   WHERE name = N'FatalErrSumm' AND type = N'U')
        BEGIN 
            DROP TABLE [Report]..[FatalErrSumm];
            CREATE TABLE [Report]..[FatalErrSumm]
            (
                [MDF] NVARCHAR(255) NULL,
                [Error] INT NULL,
            );
        END
    END

This checks if Report exists from a different databse; if it does not exist it creates it, if it does, it checks if table FatalErrSumm exists and if it does it drops and recreates it.

The problems is that it seems to be executing both possiblities of the IF NOT EXISTS block and giving the error

Msg 2702, Level 16, State 2, Line 24
Database 'Report' does not exist.

when the database Report does not exist. So it should never be entering the ELSE block, however it seems to be. This is very basic stuff, but I cannot for the life of me spot the error, What am I doing wrong here?

Thanks for your time.

Answer 1

You should bypass it using a dynamic sql

 IF NOT EXISTS (SELECT name  
               FROM sys.databases  
               WHERE name = N'Report') 
    BEGIN 
        DECLARE @DatabasePath NVARCHAR(1000); 
        SET @DatabasePath = (SELECT ResultMessage + '\'  
                             FROM [Admin]..[Process]); 
        EXEC ispCREATEDB N'Report', @DatabasePath, N'10MB', N'20%' 
    END 
ELSE IF DB_ID('Report') IS NOT NULL
    EXEC
    (
        'BEGIN  
        IF EXISTS (SELECT *   
                   FROM Report.sys.objects  
                   WHERE name = N''FatalErrSumm'' AND type = N''U'') 
        BEGIN  
            DROP TABLE [Report]..[FatalErrSumm]; 
            CREATE TABLE [Report]..[FatalErrSumm] 
            ( 
                [MDF] NVARCHAR(255) NULL, 
                [Error] INT NULL, 
            ); 
        END 
        END'
        );