Continue statement in while loop in TSQL?

Question

Hi, In Sql Server 2000 and 2005 I am running a select statement in a while loop. JFYI, this select statement is connecting to many linked servers and getting some values.

IF there is any error, i want it should still execute next statement in the loop (similar to continue statement in c#)

Example:-

while @rowcount < 10
begin
 set @sql = 'select * from <Remotemachine>.db1.dbo.table1'
 exec sp_executesql @sql
 set @rowcount = @rowcount +1
End

Answer 1

Start here: http://www.sommarskog.se/error_handling_2005.html

Keep in mind that some errors are session and even batch terminators and you can't trap those

The link I gave you(and the 2 links on that page) should give you enough information on how to handle this

BTW, unless it is a non trapable error it will continue executing

run this

declare @rowcount int, @sql nvarchar(100)
set @rowcount = 1
while @rowcount < 10
begin
 set @sql = 'select * from <Remotemachine>.db1.dbo.table1'
 exec sp_executesql @sql
 print @rowcount
 set @rowcount = @rowcount +1
End

Here is the output

Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
1
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
2
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
3
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
4
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
5
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
6
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
7
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
8
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '<'.
9

Here is how you can use TRY CATCH to trap this

declare @rowcount int, @sql nvarchar(100)
set @rowcount = 1
while @rowcount < 10
begin
 set @sql = 'select * from <Remotemachine>.db1.dbo.table1'

 begin try 
      exec sp_executesql @sql
 end try 
 begin catch
      select ERROR_MESSAGE() -- or do something
 end catch
 print @rowcount
 set @rowcount = @rowcount +1
End

Answer 2

In 2005 you can put in a try/catch.