Weird!! &&< Sign Doesn't Work Within DataReader Source Connecting To Mysql Using ADO.NET ODBC Option

my package contains

Two connections ==> one is using OLEDB connecting to SQL server 2005 and the other using ADO.NET's ODBC option to connect to mysql;



Two "Execute SQL Task" ==> one gets maximum ID(bigint) from a SQL server table and the other gets the maximum ID(unsigned) from a mysql's table and bind them to two variables ID1(string) and ID2 (int 64). http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=1902297&SiteID=17&mode=1 ;



And one DataFlow whose data source is DataReader Source which queries mysql "select * from table where ID > cast(@ID1 as signed) and ID <= cast(@ID2 as signed) ". To debug, I put a DataViewer between Data Flow Source and Data Flow Destination.



Run the package, I found no data coming into DataViewer and no error message as well. However if I remove the "<=" sign and change the DataReader Source query to "select * from table where ID > cast(@ID1 as signed)", It works perfectly. Initially I thought it's variable @ID2's issue. But if I replace "<=" sign with ">=" sign in the query ==> "select * from table where ID >= (cast(@ID2 as signed) -100)", there is no problem. After tried many times, I found that query just doesn't work with "<" sign or "between". Plus the result of running package tells it's successful but just no records got inserted into Data Flow Destination.



Anyone could help? Thanks!