Computed columns in temp tables

I am having a problem with using UDF as part of a temp table computed
column. Here's the sample code:
IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
'fn_test')
DROP FUNCTION dbo.fn_test
GO
CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
RETURNS INT AS
BEGIN
DECLARE @.z INT
SET @.z = @.x + @.y
RETURN @.z
END
GO
CREATE TABLE #X
(
x INT,
y INT,
z AS (dbo.fn_test(x,y))
)
I receive the following error:
Server: Msg 208, Level 16, State 1, Line 2
Invalid object name 'dbo.fn_test'.
I do not get this error if I use a regular table.
HELP!
Looks like the UDF is being looked up in the tempdb database. If you created
the UDF in tempdb, your table creation will succeed. I am not sure if this
is the expected behavior. I'll post again, if I find out more.
HTH,
Vyas, MVP (SQL Server)
http://vyaskn.tripod.com/
Is .NET important for a database professional?
http://vyaskn.tripod.com/poll.htm
"Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
news:eZChvYqWEHA.2804@.TK2MSFTNGP10.phx.gbl...
I am having a problem with using UDF as part of a temp table computed
column. Here's the sample code:
IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
'fn_test')
DROP FUNCTION dbo.fn_test
GO
CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
RETURNS INT AS
BEGIN
DECLARE @.z INT
SET @.z = @.x + @.y
RETURN @.z
END
GO
CREATE TABLE #X
(
x INT,
y INT,
z AS (dbo.fn_test(x,y))
)
I receive the following error:
Server: Msg 208, Level 16, State 1, Line 2
Invalid object name 'dbo.fn_test'.
I do not get this error if I use a regular table.
HELP!
|||Hi,
As far as I know, You cannot use a UDF inside the table creation. It should
be
create table #x(i int,j int,k as i+j)
insert into #x(i,j) values(1,10)
select * from #x
output will be:-
i j k
-- -- --
1 10 11
(1 row(s) affected)
Thanks
Hari
MCDBA
"Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
news:eZChvYqWEHA.2804@.TK2MSFTNGP10.phx.gbl...
> I am having a problem with using UDF as part of a temp table computed
> column. Here's the sample code:
> IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
> 'fn_test')
> DROP FUNCTION dbo.fn_test
> GO
> CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
> RETURNS INT AS
> BEGIN
> DECLARE @.z INT
> SET @.z = @.x + @.y
> RETURN @.z
> END
> GO
> CREATE TABLE #X
> (
> x INT,
> y INT,
> z AS (dbo.fn_test(x,y))
> )
> I receive the following error:
> Server: Msg 208, Level 16, State 1, Line 2
> Invalid object name 'dbo.fn_test'.
> I do not get this error if I use a regular table.
> HELP!
>
|||Sorry for the wrong information.
Thanks Vyas. I have never tried this option.
Thanks
Hari
MCDBA
"Hari" <hari_prasad_k@.hotmail.com> wrote in message
news:OLTxVgqWEHA.716@.TK2MSFTNGP11.phx.gbl...
> Hi,
> As far as I know, You cannot use a UDF inside the table creation. It
should[vbcol=seagreen]
> be
> create table #x(i int,j int,k as i+j)
> insert into #x(i,j) values(1,10)
> select * from #x
> output will be:-
> i j k
> -- -- --
> 1 10 11
> (1 row(s) affected)
>
> --
> Thanks
> Hari
> MCDBA
> "Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
> news:eZChvYqWEHA.2804@.TK2MSFTNGP10.phx.gbl...
=
>
|||I have thought that was the case but no luck! I modified the code to
explicitly call the function in the database where it was created and still
got the same error. Here's modified code:
use master
GO
IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
'fn_test')
DROP FUNCTION dbo.fn_test
GO
CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
RETURNS INT AS
BEGIN
RETURN @.x + @.y
END
GO
CREATE TABLE #X
(
x INT,
y INT,
z AS (master.dbo.fn_test(x,y))
)
"Narayana Vyas Kondreddi" <answer_me@.hotmail.com> wrote in message
news:O52L6fqWEHA.2544@.TK2MSFTNGP10.phx.gbl...
> Looks like the UDF is being looked up in the tempdb database. If you
created
> the UDF in tempdb, your table creation will succeed. I am not sure if this
> is the expected behavior. I'll post again, if I find out more.
> --
> HTH,
> Vyas, MVP (SQL Server)
> http://vyaskn.tripod.com/
> Is .NET important for a database professional?
> http://vyaskn.tripod.com/poll.htm
>
> "Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
> news:eZChvYqWEHA.2804@.TK2MSFTNGP10.phx.gbl...
> I am having a problem with using UDF as part of a temp table computed
> column. Here's the sample code:
> IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
> 'fn_test')
> DROP FUNCTION dbo.fn_test
> GO
> CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
> RETURNS INT AS
> BEGIN
> DECLARE @.z INT
> SET @.z = @.x + @.y
> RETURN @.z
> END
> GO
> CREATE TABLE #X
> (
> x INT,
> y INT,
> z AS (dbo.fn_test(x,y))
> )
> I receive the following error:
> Server: Msg 208, Level 16, State 1, Line 2
> Invalid object name 'dbo.fn_test'.
> I do not get this error if I use a regular table.
> HELP!
>
>
|||As Vyas pointed out, the issue is that you have to create the function in
tempdb. I think he is right in suggesting that you can't use UDFs that
reside in a different database in the definition of a table.
Jacco Schalkwijk
SQL Server MVP
"Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
news:%23siqQFrWEHA.3512@.TK2MSFTNGP12.phx.gbl...
> I have thought that was the case but no luck! I modified the code to
> explicitly call the function in the database where it was created and
still[vbcol=seagreen]
> got the same error. Here's modified code:
> use master
> GO
> IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
> 'fn_test')
> DROP FUNCTION dbo.fn_test
> GO
> CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
> RETURNS INT AS
> BEGIN
> RETURN @.x + @.y
> END
> GO
> CREATE TABLE #X
> (
> x INT,
> y INT,
> z AS (master.dbo.fn_test(x,y))
> )
>
> "Narayana Vyas Kondreddi" <answer_me@.hotmail.com> wrote in message
> news:O52L6fqWEHA.2544@.TK2MSFTNGP10.phx.gbl...
> created
this[vbcol=seagreen]
=
>
|||Hi,
temporary tables are always made in tempdb (and only tempdb for your solution)
change
use master
on
use tempdb
Regards,
Pablo
"Steven Yampolsky" wrote:

> I have thought that was the case but no luck! I modified the code to
> explicitly call the function in the database where it was created and still
> got the same error. Here's modified code:
> use master
> GO
> IF EXISTS( SELECT 1 FROM information_schema.routines WHERE routine_name =
> 'fn_test')
> DROP FUNCTION dbo.fn_test
> GO
> CREATE FUNCTION dbo.fn_test( @.x int, @.y int)
> RETURNS INT AS
> BEGIN
> RETURN @.x + @.y
> END
> GO
> CREATE TABLE #X
> (
> x INT,
> y INT,
> z AS (master.dbo.fn_test(x,y))
> )
>
> "Narayana Vyas Kondreddi" <answer_me@.hotmail.com> wrote in message
> news:O52L6fqWEHA.2544@.TK2MSFTNGP10.phx.gbl...
> created
>
>
|||How can I create a function in tempdb while inside a stored procedure? I
don't think I can do that.
Lets assume I can use sp_executesql to create the function inside a SP. What
will be a lifespan of it? Will it get dropped once the session is closed?
will it be accessible from other sessions? Will there be a name conflict
when two sessions will try and execute the same SP?
The more I get into it, the more questions I get. Hopefully I'll come out
with good knowledge!
Steve
"Jacco Schalkwijk" <jacco.please.reply@.to.newsgroups.mvps.org.invalid > wrote
in message news:uCXtqSrWEHA.2520@.TK2MSFTNGP12.phx.gbl...
> As Vyas pointed out, the issue is that you have to create the function in
> tempdb. I think he is right in suggesting that you can't use UDFs that
> reside in a different database in the definition of a table.
>
|||How can I create a function in tempdb while inside a stored procedure? I
don't think I can do that.
Lets assume I can use sp_executesql to create the function inside a SP. What
will be a lifespan of it? Will it get dropped once the session is closed?
will it be accessible from other sessions? Will there be a name conflict
when two sessions will try and execute the same SP?
The more I get into it, the more questions I get. Hopefully I'll come out
with good knowledge!
Steve
"Jacco Schalkwijk" <jacco.please.reply@.to.newsgroups.mvps.org.invalid > wrote
in message news:uCXtqSrWEHA.2520@.TK2MSFTNGP12.phx.gbl...
> As Vyas pointed out, the issue is that you have to create the function in
> tempdb. I think he is right in suggesting that you can't use UDFs that
> reside in a different database in the definition of a table.
>
|||Create a permanent function in tempdb, like
USE tempdb
GO
CREATE FUNCTION dbo.fnTest
(@.x int, @.y int)
RETURNS int
AS
BEGIN
RETURN (@.x+@.y)
END
GO
Now using another database u can call this function during temp table
creation
eg.
USE Pubs
CREATE TABLE #temp(x int,y int, z as dbo.fnTest(x,y))
INSERT INTO #temp VALUES(1,2)
INSERT INTO #temp VALUES(3,2)
SELECT * FROM #temp
Roji. P. Thomas
SQL Server Programmer
"Steven Yampolsky" <syampolsky@.eagleinvsys.com> wrote in message
news:eLwmCwRXEHA.2940@.TK2MSFTNGP09.phx.gbl...
> How can I create a function in tempdb while inside a stored procedure? I
> don't think I can do that.
> Lets assume I can use sp_executesql to create the function inside a SP.
What
> will be a lifespan of it? Will it get dropped once the session is closed?
> will it be accessible from other sessions? Will there be a name conflict
> when two sessions will try and execute the same SP?
> The more I get into it, the more questions I get. Hopefully I'll come out
> with good knowledge!
> Steve
> "Jacco Schalkwijk" <jacco.please.reply@.to.newsgroups.mvps.org.invalid >
wrote[vbcol=seagreen]
> in message news:uCXtqSrWEHA.2520@.TK2MSFTNGP12.phx.gbl...
in
>