SQL Server 2005脚本中的变量声明超出最大数量

Question

An application I am currently working on will generate an SQL script to populate a database. A single transaction in the script looks like this (note I have changed table/variable names ;-)

USE MyDatabase

BEGIN TRANSACTION

SET XACT_ABORT ON
DECLARE @Foo int

SET IDENTITY_INSERT Table1 ON 
INSERT INTO Table1 [...]
SET IDENTITY_INSERT Table1 OFF 

SET IDENTITY_INSERT Table2 ON 
INSERT INTO Table2 [...]
SET IDENTITY_INSERT Table2 OFF 

INSERT INTO Table3 [...]

-- Here I reference @Foo
SET @Foo = dbo.SomeStoredProcedure()
-- Use @Foo in some query

COMMIT TRANSACTION

GO

SET NOCOUNT ON

This script will then generate n of these transactions, which will then be excuted on SQL Server 2005 to populate the database with n records.

The problem I am seeing is with the declaration of the @Foo variable shown above. When running the script, once we have reached 65535 records, I get the following error:

The variable name '@Foo' has already been declared.
Variable names must be unique within a query batch or stored procedure.

I think this is a misleading error message, because everything is fine until I hit 65535, and the significance of this number (2^16-1) leads me to believe I am hitting some sort of script limitation.

I have tried defining the @Foo variable once, at the top of the script, and re-using it within each transaction. But this doesn't work as it appears each transaction has its own scope.

Would creating an extra level of scope (ie an inner transaction) and declaring the variable within the deeper scope help address this issue?

Any other recommendations about the best way to fix this issue?

Answer 1

Looks like you've missed the GO delimiter, since I have scripts with many more lines. Check your scripting solution

Answer 2

Try The Go delimiter and also change the data type for the dynmc. variable. You are going out of its range and an "INT" is a cyclic data type in SQL Servers. It will come to the same address when the cycle of -65536 to 65535 completes.