ORA-01008 but all variables are bound and working in Oracle SQL Developer

Question

Command.CommandText = "SELECT SUM(REQHOURS), SUM(REQQUANTITY) / COUNT(*) 
    FROM ORDERS WHERE ORDERNUMBER = :OrderNumber AND 
    OPERATION = (SELECT MIN(OPERATION) FROM ORDERS 
    WHERE ORDERNUMBER = :OrderNumber AND OPERATION > :Operation)";
Command.Parameters.Add("OrderNumber", order.OrderNumber);
Command.Parameters.Add("Operation", order.Operation);

The query above is working fine in the Oracle SQL Developer (OSQLD for further reference) application but when I run it in C# I get the following error:

ORA-01008: not all variables bound

When I debugged parts of the query in C# I found out that if I remove AND OPERATION > :Operation the query executes but the DataReader is Null . If I than run it in OSQLD I do get values back.

For people wondering, order.OrderNumber and order.Operation are certainly not Null .

I have multiple queries in my application and all of them work fine. It's only this one that gives me problems.

Answer 1

I found the solution after some thinking basically...

The code I started with was as follow:

Command.CommandText = "SELECT SUM(REQHOURS), SUM(REQQUANTITY) / COUNT(*) 
    FROM ORDERS WHERE ORDERNUMBER = :OrderNumber AND 
    OPERATION = (SELECT MIN(OPERATION) FROM ORDERS 
    WHERE ORDERNUMBER = :OrderNumber AND OPERATION > :Operation)";
Command.Parameters.Add("OrderNumber", order.OrderNumber);
Command.Parameters.Add("Operation", order.Operation);

In the query are 3 parameters :OrderNumber twice and :Operation once so I added both to the parameter list. After all, you only have to assign a variable to a parameter once in the Oracle SQL Developer application.

Here's the tricky part. The reason why I got error ORA-01008 was justified. I got 3 parameters and I only added 2 to the parameter list hence the error.

The piece of code below is not a working version of the query:

Command.CommandText = "SELECT SUM(REQHOURS), SUM(REQQUANTITY) / COUNT(*) 
    FROM ORDERS WHERE ORDERNUMBER = :OrderNumber AND 
    OPERATION = (SELECT MIN(OPERATION) FROM ORDERS 
    WHERE ORDERNUMBER = :OrderNumber AND OPERATION > :Operation)";
Command.Parameters.Add("OrderNumber", order.OrderNumber);
Command.Parameters.Add("OrderNumber", order.OrderNumber);
Command.Parameters.Add("Operation", order.Operation);

Answer 2

You need to specify parameter name with : . I thing you just missed that because you mentioned you have already working queries :). So in your case:

Command.Parameters.Add(":OrderNumber", order.OrderNumber);
Command.Parameters.Add(":Operation", order.Operation);