Need help about ref cursor using like table

Hi Guys...
I am devloping package function And i need help about cursor
One of my function return sys_refcursor. And the return cursor need to be
join another table in database . I don't have to fetch all rows in cursor
All i need to join ref cursor and another table in sql clause
like below
select a.aa , b.cc form ( ref_cursor ) A, table B
where A.dd = B.dd
I appeciate it in advance

My understanding is that you have a function that returns a refcursor and is called by a java app.
Because this is a commonly used bit of code, you also want to reuse this cursor in other bits of sql and so you want to include it like table in a bit of sql and join that refcursor to other tables.
It's not as easy as you might hope but you can probably achieve this with pipelined functions.
Is it a direction that code should be going down? yes, eventually. I like the idea of pulling commonly used bits of code into a SQL statement especially into the WITH section, provided it could be used efficiently by the CBO.
Is it worth the effort given what you have to do currently to implement it? possibly not.
what else could you do? construct the sql statement independently of the thing that used it and reuse that sql statement rather than the refcursor it returns?
Message was edited by:
dombrooks

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Need help with Ref Cursor

Dear All,
Version : '11.2.0.2.0'
I have a procedure which gets called from a screen ( on .Net) if use pushes a particular button.
The procedure takes 15 minutes to complete.
My requirement is to intimate the front end(.Net) as soon as the procedures gets called successfully without waiting for its completion as it is going to take 15 mins.
The reason being, the front end will popup a message saying that " The process is going to take long time, A mail will be sent to u after its completion" once it has been intimated that the procedure has been called successfully.
Could you please suggest can i return a cursor to front end without even manipulating the data.
i hope my question is understandable.

9876564 wrote:
Dear All,
Version : '11.2.0.2.0'
I have a procedure which gets called from a screen ( on .Net) if use pushes a particular button.
The procedure takes 15 minutes to complete.
My requirement is to intimate the front end(.Net) as soon as the procedures gets called successfully without waiting for its completion as it is going to take 15 mins.
The reason being, the front end will popup a message saying that " The process is going to take long time, A mail will be sent to u after its completion" once it has been intimated that the procedure has been called successfully.
Could you please suggest can i return a cursor to front end without even manipulating the data.
i hope my question is understandable.
It seems to me that your problem is not an Oracle one, but a user interface one.
I'm assuming the slowness of the procedure is due to how long it's taking to query the data, and if you can't speed that up then, to have the procedure return a ref cursor, the connection between the front end and the procedure must be maintained (the process on Oracle must belong to a session, and the front end needs to be connected to that session).
So, you can't have Oracle go off and start a seperate process and then pass back the ref cursor when it's finished, because even though you can spawn off seperate processes such as using DBMS_JOB or DBMS_SCHEDULER, they will run in their own 'session' and the calling code won't keep a hold on any of those sessions... they're effectively stand-alone and seperate.
What you'll have to do is likely get your .net application to spawn off a child process to the main app, that presents the message saying it'll take some time, does the call to Oracle and waits for Oracle to return the resultant ref cursor, which it can then pass back to the main application etc. Due to .net allowing for multi-tasking, that is where the split processing should take place.

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Joining a ref cursor to a table

Dear all;
Can you please show me a simple example on how to join a ref cursor to a table because I have a function that returns a ref cursor and I would like to call that function in another function(function B) and then join it to a table in that function(function B)

user13328581 wrote:
well, I personnally know it is a bad idea but my fellow senior keeps advicing me to do it. Their reason is based on the code reusability aspect of things. I had a function 1 already created which returned a ref cursor and basically within that function is a complex select statement. Now I have function 2 which is making use of a similar select statement, the only different between the two select statment is based on the fact, the function 2 select statement is joining to another table at the very end, so based on their argument they want me to call that select statement from function 1 and join it to that table instead...Then your "+seniors+" need to extract their heads from whatever dark orifice they have it stuck in, as this is not how '"+code reusability+" works in the Oracle environment.
In the SQL language, views are used to create re-usable SQL source code.
In Oracle, the Shared Pool is used to create and store cursors for reuse (assuming the SQL source allows reusability and uses bind variables).
Joining a ref cursor (code) with a table (data) is just plain stupid - and no amount of "code reusability" arguing will change this fact.

How to retrieve data from a REF CURSOR using OCI 8.0?

I found an example in Oracle docs (shown below) that discusses how to bind a REF CURSOR for later data retrieval, but it does not explain actually how to do the later data retrieval.
I hope someone can explain it to me. Thanks
The OCI provides the ability to bind and define PL/SQL REF CURSORs and nested tables. An application can use a statement handle to bind and define these types of variables. As an example, consider this PL/SQL block:
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In this code, stm1p is the statement handle for the PL/SQL block, while stm2p is the statement handle which is bound as a REF CURSOR for later data retrieval. A value of SQLT_RSET is passed for the dty parameter.

( sorry, i forgot the Link where i get this html fiLes, so i just copy-paste here )
( maybe it can heLp you a bit. -- it's heLp me, for sure )
And the following is thanks to Brett Rosen :
I noticed that you didn't have an OCI entry
on http://osi.oracle.com/~tkyte/ResultSets/index.html .
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char* pUsernameChar = "scott";
char* pPasswordChar = "tiger";
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char ename[40];
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OCIServer* g_pOciServer = NULL;
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OCISvcCtx* g_pOciServiceContext = NULL;
sb2* pIndicator=0;
sb2* pIndicator2=0;
sb2* pIndicator3=0;
OCIDefine* pOciDefine;
OCIDefine* pOciDefine2;
OCIBind* pBind;
OCIStmt* cursor;
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answer = OCIHandleAlloc(g_pOciEnvironment, (void **)&g_pOciSession, OCI_HTYPE_SESSION, 0, NULL);
answer = OCIHandleAlloc(g_pOciEnvironment, (void **)&g_pOciServer, OCI_HTYPE_SERVER, 0, NULL);
answer = OCIHandleAlloc(g_pOciEnvironment, (void **)&g_pOciServiceContext, OCI_HTYPE_SVCCTX, 0, NULL);
answer = OCIServerAttach(g_pOciServer, pOciError, (unsigned char *)pConnectChar, strlen(pConnectChar),
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answer = OCIDefineByPos(cursor,&pOciDefine2, pOciError,1,ename,40,
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if (answer == 0)
while ((answer = OCIStmtFetch(cursor,pOciError, 1,OCI_FETCH_NEXT,OCI_DEFAULT)) == 0)
printf("fetched id %d and name %s\n",id,ename);
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return 0;
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Dear all,
Can we create the cursor using the table which is created dynamically using "Execute immediate" within the same procedure,
or is there any way to call the table created dynamically ..
please Do Help me in this
thanks alot
Edited by: khaja on Jan 18, 2009 10:57 AM

Well, I don't think this approach is bad in any possible circumstances. It depends on the requirements we don't know. Yes, usually applications should not be designed in this way. But 'usually' does not mean 'never'. One possible case is described in Oracle's example Referencing Database Objects that Do Not Exist at Compilation. It's possible to assume that tables inv_01_2003, inv_04_2003, etc from the referenced topic What Is Dynamic SQL? are generated automatically by some job using dynamic create table stmt. If the OP has similar requirements tnen this approach is not bad. It may not be the best one but it at least is not so bad as you said.
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Message was edited by:
DimaCit

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Need help about ref cursor using like table

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