Adding New Columns With Check Constraints Using Same Batch

I'm using a stored procedure to add fields to an existing table.

These fields must have check constraints and I need to use one T-SQL batch.

In Sql2000 Ok. In Sql2005, if table exists, I get error "invalid column xxxxx" in Add Constraint statement before new column creation.

the code is

Declare @Setup bit

Set @Setup = 1

if @Setup = 1 Begin

--Alter Table MyTable Add MyField Numeric(1, 0) Not Null Default 3

Exec mySp_Add_Column 'MyTable', 'MyField', 'Numeric (1, 0) Not Null', '3'

If IsNull(ObjectProperty(Object_Id('xCK_MyTable_MyField'), 'IsConstraint'), 0) = 0

Alter Table MyTable Add Constraint xCK_MyTable_MyField Check (MyField >= 1 And MyField <= 3)

End Else Begin

-- drop column

End

GO

If MyTable does not exist and, naturally, I add it before of check constraints (using another Sp which add tables) ok.

If I add FK to new fields, ok.

Now I have to split batch in two parts as workaround...

Can anyone tell me if this is a bug or a "fix" for previous versions?

Many thanks,

Giulio