如何在SELECT语句中以列名作为参数调用用户定义的函数？

Question

SQL Server 2005

I want to call UDF that returns table in SELECT statement as below.

select *, GetIptoCountry(IP_address) as country from tblInfo

but I am getting following error

'GetIptoCountry' is not a recognized built-in function name.

IP_address is the column in tblInfo .

How can I call UDF like this?

Answer 1

You have to use the fully qualified name of the function including the schema name :

For example (if the scema is dbo ), you can call the function with dbo.GetIptoCountry() :

select *, dbo.GetIptoCountry(IP_address) as country from tblInfo

UPDATE:

According your last comment, you seems to have a table-valued function (wich returns table rows), not a scalar-valued function (wich returns a value), so the call can be done like this:

Select * from dbo.GetIptoCountry('your_ip_adress');

Your final query can looks like:

select * 
from tblInfo 
cross apply dbo.GetIptoCountry(IP_address)  tblCountry

Answer 2

My problem was much more simple. I had reconnected to the database. SSMS still had me as using the Master Database.

I just click the drop down or run a "USE MyDatabase" statement and voila.