Question

I’m trying to return sequence.nextval to my program from a proc stored in a package. I’m pretty green when it comes to PL/SQL and I’m kind of at a loss as to what is happening. The error that is actually being return is

PLS-00306: Wrong number or types of arguments in call to PROCGET_BOOKMARKID line 1, column 7 statement ignored.

Here is my package creation code…

 create or replace package BOOKMARKS AUTHID DEFINER is   type t_Bookmark is ref cursor;    procedure procGet_Bookmarked_Information(bookmarkId in NUMBER, bookmark out t_Bookmark);   procedure procInsert_Bookmark(bookmarkId in NUMBER, currExtent in VARCHAR2, selectedLayers in VARCHAR2);   procedure procGet_Bookmark_Id(bookmarkId out NUMBER);  end BOOKMARKS;  

And the proc for get_bookmark_id looks like this (the other procs work fine so I’m not going to post them)…

   procedure procGet_Bookmark_Id(bookmarkId out NUMBER)   IS   BEGIN     SELECT seq_bookmarks.nextval INTO bookmarkId       FROM dual;    END procGet_Bookmark_Id; 

Now, I’m sure it’s not my sequence. I can get the nextval if I just query the db directly from my code by doing this…

 string sql = string.Format(@'select {0}.seq_bookmarks.nextval from dual', ApplicationSchema); 

Where application schema is just the db I'm connecting to in this case.

So, it appears to me that the problem is completely in my PL/SQL and that would make sense because I've hardly used it. Any ideas?

EDIT Ok, so here is the code that is actually making the call.

 DataOperationResult result = DataAccess.GetBookmarkId(); DataRow currResult = result.DataTableResult.Rows[0]; 

Where DataAccess is a class of just queries and the following is the code there for this specific query.

 string sql = string.Format('{0}.bookmarks.procGet_Bookmark_Id', ApplicationSchema); DataOperation operation = new DataOperation(DataOperationType.ExecuteScalar, ConnectionString, System.Data.CommandType.StoredProcedure, sql); return operation.PerformOperation(); 

Application Schema is just the database we want to query. ExecuteScalar is kind of long-winded and it's code I've not written that should be assumed to work (keyword being assumed). Hopefully this is enough to get an idea of what's happening though.

Answer 1

I’ve just compiled your package, in PL/SQL Developer it works fine.

The problem seems to be with the datatypes in your C# code.

From what I see in description, you don’t bind any parameters. You should bind parameters somewhere in your code, like

OracleParameter bid = new OracleParameter('bookmarkID', OracleDbType.Number); bid.Direction = ParameterDirection.Output; command.Parameters.Add(bid); 

If there are lots of abstractions you need to deal with, you may redefine you procedure as a function:

FUNCTION procGet_Bookmark_Id RETURN INTEGER IS   res INTEGER; BEGIN   SELECT seq_bookmarks.nextval   INTO res   FROM dual;   RETURN res; END procGet_Bookmark_Id; 

and call it in a SELECT query:

SELECT bookmarks.procGet_Bookmark_id FROM dual; 

, which you seem to be able to do.