I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don’t change the columns. If I add a column later, it will give an error saying “invalid column”. Please let me know what I am doing wrong.
IF OBJECT_ID('tempdb..#Results') IS NOT NULL
DROP TABLE #Results
CREATE TABLE #Results
(
Company CHAR(3),
StepId TINYINT,
FieldId TINYINT,
)
select company, stepid, fieldid from #Results
--Works fine to this point
IF OBJECT_ID('tempdb..#Results') IS NOT NULL
DROP TABLE #Results
CREATE TABLE #Results
(
Company CHAR(3),
StepId TINYINT,
FieldId TINYINT,
NewColumn NVARCHAR(50)
)
select company, stepid, fieldid, NewColumn from #Results
--Does not work
16 s
I cannot reproduce the error.
Perhaps I’m not understanding the problem.
The following works fine for me in SQL Server 2005, with the extra “foo” column appearing in the second select result:
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
GO
CREATE TABLE #Results ( Company CHAR(3), StepId TINYINT, FieldId TINYINT )
GO
select company, stepid, fieldid from #Results
GO
ALTER TABLE #Results ADD foo VARCHAR(50) NULL
GO
select company, stepid, fieldid, foo from #Results
GO
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
GO