Question

I have a stored procedure which retrieves multiple rows of 3 column items. I am retrieving in the format of DataTable. When I debug it it gives me error

Must Declare Scalar variable @Ticket.

But I have already declared that.

Stored procedure :

BEGIN

Declare @Ticket Numeric(28,0)
Declare @SQL VarChar(Max)
Declare @SQLUpdate VarChar(Max)

 Set @SQL='Select @Ticket=Ticket,VendorTicket[Vendor Ticket],Comments From dbo.VendorTickets Where NotifyOn <= GetDate() And IsNull(NotifyOn,0)<>0 '
 Exec(@SQL)

 Set @SQLUpdate='Update dbo.VendorTicket Set NotifyOn=0 Where Ticket=@Ticket'
 Exec(@SQLUpdate)

END

Code which calls stored procedure

SqlConnection oConn = null;
DataTable dtReturn = null;
try
{
getConnection(ref oConn, 1);
using (SqlStoredProcedure sspObj = new SqlStoredProcedure("dbo.usp_checkNotification", oConn, CommandType.StoredProcedure))
{
dtReturn = sspObj.ExecuteDataTable();
sspObj.Dispose();
}
closeConnection(ref oConn);
}

Answer 1

Why are you using dynamic SQL?

Just do this

 Update dbo.VendorTickets
 Set NotifyOn=0 
 Where NotifyOn <= GetDate() 
 And NotifyOn IS NOT NULL

Note that setting a datetime (NotifyOn) to 0 will set it to 1900-01-01.