Using REF CURSOR from JDBC?

How do I use a REF CURSOR OUT parameter present in a Stored Procedure from my JDBC program?

here is an example, calling a packaged function. 1st param is delared as IN OUT REF CURSOR.
CallableStatement cs = conn.prepareCall("{? = call myPackage.myFunc(?,?)}");
cs.registerOutParameter (1, OracleTypes.INTEGER);
cs.registerOutParameter (2, OracleTypes.CURSOR);
cs.setInt(3,mInt.intValue());
boolean boolValue = cs.execute();
ResultSet cursor = ((OracleCallableStatement)cs).getCursor (2);
i hope this helps.
null

Similar Messages

Stored procedure call with REF CURSOR from JDBC

How can I call a SP with a REF CURSOR OUT parameter from JDBC?

This is a breeze.
CallableStatement oraCall = oraConn.prepareCall("BEGIN PKG_SOMETHING.RETURNS_A_SP(?);END;");
oraCall.registerOutParameter(1,oracle.jdbc.driver.OracleTypes.CURSOR);
oraCall.execute();
ResultSet rsServList = (ResultSet) oraCall.getObject(1);
... use ResultSet ...
rsServList.close();
oraCall.close();
slag

Problem using REF CURSOR in JDBC

i have several stored procedures and functions that return REF CURSOR object as output. however, i'm noticing that if
no rows are returned within the cursor, the JDBC driver is throwing a "No more data to read from socket" exception.
i'm using the Oracle Thin JDBC driver v8.1.6 for JDK 1.2.
any help is appreciated.
thanks,
gary
null

I am not able to reproduce the problem. Could you post a testcase so that we can follow it up?
Thanks.

Using Ref cursor from Procedure output in BPEL

Hi
Can any body help me ..
The output variable of db adapter is refcursor from stored procedure. in ref cursor i will get xml from a clob variable. how to use it in bpel...can an body help me how to do it....

APEX is based on Oracle Database. Whatever you can do with PL/SQL, the same can be done with APEX also. APEX stores the application definition in the form of metadata.
So if you put all your logic and code in packages, procedures or functions then it will be really good compact and modular approach.
Bottom line is that you can do all of those.
Check the documentation at
http://www.oracle.com/technetwork/developer-tools/apex/documentation/index.html
Thanks,
Mehabub

How return parameter ref Cursor from procedure using dynamic SQL?

I sorry, but i very need help.
I using Oracle 8.0.6
I need to return parameter of type ref Cursor from procedure.
create or replace package PlanExp is
type cursortype is ref cursor;
procedure ShowPlan (cursorparam out
cursortype.............);
end PlanExp;
create or replace package body PlanExp is
procedure ShowPlan (cursorparam out cursortype,
.............) Is
sql_str varchar2(1000);
sql_str_select varchar2(100);
sql_str_from varchar2(100);
sql_str_where varchar2(500);
Return_Code integer;
Num_Rows integer;
cur_id_sel integer;
tSum_Plan DBMS_SQL.NUMBER_TABLE;
tSum_Plan_Ch DBMS_SQL.NUMBER_TABLE;
tSum_Plan_Day DBMS_SQL.NUMBER_TABLE;
begin
/* calculating string variables ........... /*
sql_str := 'select ' || sql_str_select ||
'from ' || sql_str_from ||
'where ' || sql_str_where ||
'group by ' || sql_str_select;
cur_id_sel := dbms_sql.open_cursor;
dbms_sql.parse(cur_id_sel, sql_str, dbms_sql.native);
dbms_sql.define_array(cur_id_sel, 1, tSum_Plan, 20, 1);
dbms_sql.define_array(cur_id_sel, 2, tSum_Plan_Ch, 20, 1);
dbms_sql.define_array(cur_id_sel, 3, tSum_Plan_Day, 20, 1);
Return_Code := dbms_sql.execute(cur_id_sel);
delete from TEMP_SHOWPLAN;
Loop
Num_Rows := dbms_sql.Fetch_Rows(cur_id_sel);
dbms_sql.column_value(cur_id_sel, 1, tSum_Plan);
dbms_sql.column_value(cur_id_sel, 2, tSum_Plan_Ch);
dbms_sql.column_value(cur_id_sel, 3, tSum_Plan_Day);
if Num_Rows = 0 then
exit;
end if;
Exit When Num_Rows < 20;
End Loop;
dbms_sql.close_cursor(cur_id_sel);
end;
end PlanExp;
How return cursor (cursorparam) from 3 dbms_sql.column_value-s ?

I am using Oracle 8.1.7, so I don't know if this will work in
8.0.6 or not:
SQL> CREATE TABLE test
2    (col1                    NUMBER,
3     col2                    NUMBER,
4     col3                    NUMBER)
5 /
Table created.
SQL> INSERT INTO test
2 VALUES (1,1,1)
3 /
1 row created.
SQL> INSERT INTO test
2 VALUES (2,2,2)
3 /
1 row created.
SQL> INSERT INTO test
2 VALUES (3,3,3)
3 /
1 row created.
SQL> CREATE TABLE temp_showplan
2    (tSum_Plan               NUMBER,
3     tSum_Plan_Ch            NUMBER,
4     tSum_Plan_Day           NUMBER)
5 /
Table created.
SQL> EDIT planexp
CREATE OR REPLACE PACKAGE PlanExp
IS
TYPE CursorType IS REF CURSOR;
PROCEDURE ShowPlan
    (cursorparam    IN OUT CursorType,
     sql_str_select IN     VARCHAR2,
     sql_str_from   IN     VARCHAR2,
     sql_str_where IN     VARCHAR2);
END PlanExp;
CREATE OR REPLACE PACKAGE BODY PlanExp
IS
PROCEDURE ShowPlan
    (cursorparam    IN OUT CursorType,
     sql_str_select IN     VARCHAR2,
     sql_str_from   IN     VARCHAR2,
     sql_str_where IN     VARCHAR2)
IS
    sql_str                VARCHAR2 (1000);
    cur_id_sel             INTEGER;
    return_code            INTEGER;
BEGIN
    DELETE FROM temp_showplan;
    sql_str := 'INSERT INTO   temp_showplan '
           || ' SELECT '   || sql_str_select
           || ' FROM '     || sql_str_from
           || ' WHERE '    || sql_str_where;
    cur_id_sel := DBMS_SQL.OPEN_CURSOR;
    DBMS_SQL.PARSE (cur_id_sel, sql_str, DBMS_SQL.NATIVE);
    return_code := DBMS_SQL.EXECUTE (cur_id_sel);
    DBMS_SQL.CLOSE_CURSOR (cur_id_sel);
    OPEN cursorparam FOR SELECT * FROM temp_showplan;
END ShowPlan;
END PlanExp;
SQL> START planexp
Package created.
Package body created.
SQL> VARIABLE g_ref REFCURSOR
SQL> EXEC PlanExp.ShowPlan (:g_ref, 'col1, col2,
col3', 'test', ' 1 = 1 ')
PL/SQL procedure successfully completed.
SQL> PRINT g_ref
TSUM_PLAN TSUM_PLAN_CH TSUM_PLAN_DAY
         1            1             1
         2            2             2
         3            3             3

Report using ref cursor or dynamic Sql

Hi,
I never create a report using a ref cursor or a dynamic sql. Could any one help me to solve the below issue.
I have 2 tables.
1. Student_Record
2. Student_csv_help
Student_Record the main table where the data is stored.
Student_csv_help will contain the all the column names of the Student_record.
CREATE TABLE Student_CSV_HELP
ENTRY_ID NUMBER,
RAW_NAME VARCHAR2(40 BYTE),
DESC_NAME VARCHAR2(1000 BYTE),
IN_OUTPUT_LIST VARCHAR2(1 BYTE)
SET DEFINE OFF;
Insert into TOA_CSV_HELP
(ENTRY_ID, RAW_NAME, DESC_NAME, IN_OUTPUT_LIST)
Values
(1, 'S_ID', 'Student ID', 'Y');
Insert into TOA_CSV_HELP
(ENTRY_ID, RAW_NAME, DESC_NAME, IN_OUTPUT_LIST)
Values
(2, 'S_Name', 'Student Name', 'Y');
Insert into TOA_CSV_HELP
(ENTRY_ID, RAW_NAME, DESC_NAME, IN_OUTPUT_LIST)
Values
(3, 'S_Join_date', 'Joining Date', 'Y');
Insert into TOA_CSV_HELP
(ENTRY_ID, RAW_NAME, DESC_NAME, IN_OUTPUT_LIST)
Values
(4, 'S_Address', 'Address', 'Y');
Insert into TOA_CSV_HELP
(ENTRY_ID, RAW_NAME, DESC_NAME, IN_OUTPUT_LIST)
Values
(5, 'S_Fee', 'Tution Fee', 'N');
commit;
CREATE TABLE Student_record
S_ID NUMBER,
S_Name VARCHAR2(100 BYTE),
S_Join_date date,
S_Address VARCHAR2(360 BYTE),
S_Fee Number
Insert into Student_record
(S_ID, S_Name, S_Join_date, S_Address,S_Fee)
Values
(101, 'john', TO_DATE('12/17/2009 08:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'CA-94777', 2000);
Insert into Student_record
(S_ID, S_Name, S_Join_date, S_Address,S_Fee)
Values
(102, 'arif', TO_DATE('12/18/2009 08:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'CA-94444', 3000);
Insert into Student_record
(S_ID, S_Name, S_Join_date, S_Address,S_Fee)
Values
(103, 'raj', TO_DATE('12/19/2009 08:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'CA-94555', 2500);
Insert into Student_record
(S_ID, S_Name, S_Join_date, S_Address,S_Fee)
Values
(104, 'singh', TO_DATE('12/20/2009 08:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'CA-94666', 2000);
Commit;
Now my requirement is:
I have a form with Student_record data block. When i Click on print Button on this form. It will open another window which has Student_CSV_HELP.DESC_NAME and a check box before this.
The window look like as below:
check_box       DESC_NAME+
X                   S_ID+
--                   S_Name+
X                   S_Join_date+
X                   S_Address+
--                  S_Fee+
X means check box checked.+
-- means check box Unchecked.+
After i selected these check boxes i will send 2 parameters to the report server
1. a string parameter to the report server which has the value 'S_ID,S_Join_date,S_Address' (p_column_name := 'S_ID,S_Join_date,S_Address');
2. the s_id value from the student_record block (p_S_id := '101');
Now my requirement is when i click on run. I need a report like as below:
Student ID : 101+
Joining Date : 12/17/2009 08:00:00+
Address : CA-94777+
This is nothing but the ref cursor should run like as below:
Select S_id from student_record block S_id = :p_S_id;
Select S_Join_date from student_record block S_id = :p_S_id;
Select S_Address from student_record block S_id = :p_S_id;
So, according to my understanding i have to select the columns at the run time. I dont have much knowledge in creating reports using ref cursor or dynamic sql.
So please help me to solve this issue.
Thanks in advance.

Plain sql should satisfy your need. Try ....
Select S_id, S_Join_date, S_Address
from student_record
where S_id = :p_S_id

Cursors are not closed when using Ref Cursor Query in a report ORA-01000

Dear Experts
Oracel database 11g,
developer suite 10.1.2.0.2,
application server 10.1.2.0.2,
Windows xp platform
For a long time, I'm hitting ORA-01000
I have a 2 group report (master and detail) using Ref Cusor query, when this report is run, I found that it opens several cursors (should be only one cursor) for the detail query although it should not, I found that the number of these cursors is equal to the number of master records.
Moreover, after the report is finished, these cursors are not closed, and they are increasing cumulatively each time I run the report, and finally the maximum number of open cursors is exceeded, and thus I get ORA-01000.
I increased the open cursors parameter for the database to an unbeleivable value 30000, but of course it will be exceeded during the session because the cursors are increasing cumulatively.
I Found that this problem is solved when using only one master Ref Cursor Query and create a breake group, the problem is solved also if we use SQL Query instead of Ref Query for the master and detail queries, but for some considerations, I should not use neither breake group nor SQL Query, I have to use REF Cursor queries.
Is this an oracle bug , and how can I overcome ?
Thanks
Edited by: Mostafa Abolaynain on May 6, 2012 9:58 AM

Thank you Inol for your answer, However
Ref Cursor give me felxibility to control the query, for example see the following query :
function QR_1RefCurDS return DEF_CURSORS.JOURHEAD_REFCUR is
temp_JOURHEAD DEF_CURSORS.JOURHEAD_refcur;
          v_from_date DATE;
          v_to_date DATE;
          V_SERIAL_TYPE number;
begin
SELECT SERIAL_TYPE INTO V_SERIAL_TYPE
FROM ACC_VOUCHER_TYPES
where voucher_type='J'
and IDENT_NO=:IDENT
AND COMP_NO=TO_NUMBER(:COMPANY_NO);
     IF :no_date=1 then
               IF V_SERIAL_TYPE =1 THEN
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT
          AND ((TO_NUMBER(VOCH_NO)=:FROM_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NULL)
          OR (TO_NUMBER(VOCH_NO) BETWEEN :FROM_NO AND :TO_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NOT NULL )
          OR (TO_NUMBER(VOCH_NO)<=:TO_NO and :FROM_NO IS NULL AND :TO_NO IS NOT NULL )
          OR (:FROM_NO IS NULL AND :TO_NO IS NULL ))
               ORDER BY TO_NUMBER(VOCH_NO);
               ELSE
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT
          AND ((VOCH_NO=:FROM_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NULL)
          OR (VOCH_NO BETWEEN :FROM_NO AND :TO_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NOT NULL )
          OR (VOCH_NO<=:TO_NO and :FROM_NO IS NULL AND :TO_NO IS NOT NULL )
          OR (:FROM_NO IS NULL AND :TO_NO IS NULL ))
               ORDER BY VOCH_NO;
               END IF;
     ELSE
               v_from_date:=to_DATE(:from_date);
               v_to_date:=to_DATE(:to_date);
          IF V_SERIAL_TYPE =1 THEN
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
          AND IDENT=:IDENT
               AND ((voch_date between v_from_date and v_to_date and :from_date is not null and :to_date is not null)
               OR (voch_date <= v_to_date and :from_date is null and :to_date is not null)
               OR (voch_date = v_from_date and :from_date is not null and :to_date is null)
               OR (:from_date is null and :to_date is null ))
               ORDER BY VOCH_DATE,TO_NUMBER(VOCH_NO);
          ELSE
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT
          AND ((voch_date between v_from_date and v_to_date and :from_date is not null and :to_date is not null)
               OR (voch_date <= v_to_date and :from_date is null and :to_date is not null)
               OR (voch_date = v_from_date and :from_date is not null and :to_date is null)
               OR (:from_date is null and :to_date is null ))
               ORDER BY VOCH_DATE,VOCH_NO;
          END IF;
     END IF;
     return temp_JOURHEAD;
end;

Unable to use ref cursor as a input parameter at the time of inserting reco

Hi
i am unable to use ref cursor when inserting the data to oracle 11g from visual studio 2008. please help me as early as possible my code is bellows
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Web.Configuration;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;
public partial class App_frmTest : System.Web.UI.Page
protected void Page_Load(object sender, EventArgs e)
protected void btnClick_Click(object sender, EventArgs e)
OracleCommand cmd=new OracleCommand();
Data objdata = new Data();
int i = 0;
string constr = "Data Source=Cwc;User Id=scott; Password=tiger;";// enlist=false; pooling=false;
OracleConnection con = new OracleConnection(constr);
/*Connection Open*/
con.Open();
cmd.Connection = con;
/*Connection Open End*/
/*Select Through Ref Cursor*/
cmd.CommandText = "scott.TEST_USER.getUSER";
cmd.CommandType = CommandType.StoredProcedure;
OracleParameter p_rc = cmd.Parameters.Add("p_rc", OracleDbType.RefCursor, DBNull.Value, ParameterDirection.Output);
OracleParameter p_rc1;
if (TextBox1.Text == "")
p_rc1 = cmd.Parameters.Add("p_rc", OracleDbType.Int16, DBNull.Value, ParameterDirection.Input);
else
p_rc1 = cmd.Parameters.Add("p_rc", OracleDbType.Int16, Convert.ToInt16(TextBox1.Text), ParameterDirection.Input);
// OracleParameter p_rc1 = cmd.Parameters.Add("p_rc", OracleDbType.Int16, 2, ParameterDirection.Input);
OracleDataReader reader = cmd.ExecuteReader();
DataSet ds = new DataSet();
DataTable dt1 = new DataTable();
dt1.Load(reader);
ds.Tables.Add(dt1);
GridView1.DataSource = ds;
GridView1.DataBind();
cmd.Parameters.Clear();
con.Close();
con.Dispose();
OracleCommand cmd1 = new OracleCommand();
OracleConnection con1 = new OracleConnection(constr);
con1.Open();
cmd1.Connection = con1;
cmd1.CommandText = "scott.TEST_USER.ADDUSER";
cmd1.CommandType = CommandType.StoredProcedure;
OracleParameter P_ADDUSER = cmd1.Parameters.Add("P_ADDUSER", OracleDbType.RefCursor, DBNull.Value, ParameterDirection.Input);
cmd1.ExecuteNonQuery(); // i am getting error when executing this line
Server Error in '/CWC' Application.
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source Error:
Line 77: OracleParameter P_ADDUSER = cmd1.Parameters.Add("P_ADDUSER", OracleDbType.RefCursor, DBNull.Value, ParameterDirection.Input);
Line 78: //OracleParameter P_MSG = cmd.Parameters.Add("P_MSG", OracleDbType.Varchar2, DBNull.Value, ParameterDirection.Output);
Line 79: cmd1.ExecuteNonQuery();
Line 80:
Line 81: DataTable dt = new DataTable();
Source File: d:\CWC\App\frmTest.aspx.cs Line: 79
Stack Trace:
[AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.]
Oracle.DataAccess.Client.OpsSql.ExecuteNonQuery(IntPtr opsConCtx, IntPtr& opsErrCtx, IntPtr& opsSqlCtx, IntPtr& opsDacCtx, IntPtr opsSubscrCtx, Int32& isSubscrRegistered, Int32 bchgNTFNExcludeRowidInfo, Int32 bQueryBasedNTFNRegistration, Int64& query_id, OpoSqlValCtx*& pOpoSqlValCtx, String pCommandText, IntPtr& pUTF8CommandText, IntPtr[] pOpoPrmValCtx, String[] ppOpoPrmRefCtx, OpoMetValCtx*& pOpoMetValCtx, Int32 prmCnt, Int32 bFromPool) +0
Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery() +4731
App_frmTest.btnClick_Click(Object sender, EventArgs e) in d:\CWC\App\frmTest.aspx.cs:79
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

Hi;
Its better to ask it at visual studio forum site:http://social.msdn.microsoft.com/Forums/en-US/category/visualstudio
Regard
Helios

How to get an UPDATABLE REF CURSOR from the STORED PROCEDURE

using C# with
ORACLE OLE DB version: 9.0.0.1
ADO version: 2.7
I returns a REF CURSOR from a stored procedure seems like:
type TCursor is ref cursor;
procedure test_out_cursor(p_Dummy in varchar, p_Cur out TCursor) is
begin
open p_Cur for select * from DUAL;
end;
I create an ADO Command object and set
cmd.Properties["IRowsetChange"].Value = true;
cmd.Properties["Updatability"].Value = 7;
cmd.Properties["PLSQLRSet"].Value = 1;
cmd.CommandText = "{CALL OXSYS.TEST.TEST_OUT_CURSOR(?)}";
and I use a Recordset object to open it:
rs.Open(cmd, Missing.Value,
ADODB.CursorTypeEnum.adOpenStatic,
ADODB.LockTypeEnum.adLockBatchOptimistic,
(int) ADODB.CommandTypeEnum.adCmdText +
(int) ADODB.ExecuteOptionEnum.adOptionUnspecified);
The rs can be opened but can NOT be updated!
I saved the recordset into a XML file and there's no
rs:baseschema/rs:basetable/rs:basecolumn
attributes for "s:AttributeType" element.
Any one have idea about this?
thanks very much

It is not possible through ADO/OLEDB.
Try ODP.NET currently in Beta, it is possible to update DataSet created with refcursors. You need to specify your custom SQL or SP to send update/insert/delete.
As I remember there is a sample with ODP.NET Beta 1 just doing this.

Reports 3.0, Ref Cursor from stored procedure

I have a problem trying to use Ref Cursor as datasource (i.e.
Ref Cursor Query) in Reports 3.0
I have created a stored package with a function which returns
Ref Cursor.
That function just opens the cursor and returns it to the
calling module.
Reports recognizes returned cursor - it creates a group for that
query, with all columns, than I built
a layout model - everything is OK on that stage.
During the execution of that report (from previewer or using
Reports Runtime) I got an error message like that:
REP-0065 Virtual Memory System Error
REP-0200 Cannot allocate enough memory cavaa22
Error's description does not correspond the reality :) - there
is enough virtual & physical memory according to
Task Manager information.
So, that does not work when this package is stored one.
When I create the package on the client side - in Reports -
everything works just fine.
Cursor is opened with a very simple query, selecting records
from the very simple table having only one record.
There is no code written which closes that cursor or fetches the
records.
Client platform: WinNT 4.0 SP3
Oracle Reports: 3.0.5.8.0
Oracle Server: Oracle8 8.0.5.0.0 (and I tried also on Oracle7
7.3.4.3.0)
Thanx.
null

Sara,
GTT (Global Temporary Tables) in Oracle work a different way compared to SQL Server and Informix. There you can create temporary tables on the fly and drop them on the fly.
Here you should (note, you don't have to, but, best practice says that you should) create the table using the syntax...
create global temporary table.....
Once you create it, even though it looks like persistent table, it's not. It will have it's own individual data PER SESSION . You have two types of GTTs:
ON COMMIT PRESERVE ROWS and ON COMMIT DELETE ROWS (they work in slightly different way).
Look up GTTs here:
http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14231/tables.htm#sthref2213
HTH,
Rahul

Need Help: Using Ref Cursor in ProC to call a function within a Package

I'm calling a function within a package that is returning a REF CURSOR.
As per the Oracle Pro*C Programmer's Guide, I did the following:
1) declared my cursor with a: EXEC SQL BEGIN DECLARE SECTION and declared the cursor as: SQL_CURSOR my_cursor;
2) I allocated the cursor as: EXEC SQL ALLOCATE :my_cursor;
3) Via a EXEC SQL.....END-EXEC begin block
I called the package function and assign the return value to my cursor
e.g. my_cursor := package.function(:host1, :host2);
Now, the only difference between my code and the example given in the Pro*C Programmer's Guide is that the example calls a PROCEDURE within a package that passes back the REF CURSOR as an OUT host variable.
Whereas, since I am calling a function, the function ASSIGNS the return REF CURSOR in the return value.
If I say my_cursor := package.function(:host1, :host2); I get a message stating, "PLS-00201: identifier MY_CURSOR" must be declared"
If I say :my_cursor := package.function(:host1, :host2); I get a message stating, "ORA-01480: trailing null missing from STR bind value"
I just want to call a package function and assign the return value to a REF CURSOR variable. There must be a way of doing this. I can do this easily in standard PL/SQL. How can this be done in Pro*C ???
Thanks for any help.

Folks, I figured it out. For those who may face this problem in the future you may want to take note for future reference.
Oracle does not allow you to assign the return value of a REF CURSOR from a FUNCTION ( not Procedure - - there is a difference) directly to a host variable. This is the case even if that host variable is declared a CURSOR variable.
The trick is as follows: Declare the REF CURSOR within the PL/SQL BEGIN Block, using the TYPE statement, that will contain the call to the package function. On the call, you then assign the return REF CURSOR value that the function is returning to your REF CURSOR variable declared in the DECLARE section of the EXEC SQL .... END-EXEC PL/SQL Block.
THEN, assign the REF CURSOR variable that was populated from the function call to your HOST cursor varaible. Then fetch this HOST Cursor variable into your Host record structure variable. Then you can deference individual fields as need be within your C or C++ code.
I hope this will help someone facing a deadline crunch. Happy computing !

Populate a REF CURSOR from regular cursor...

Hi all,
I apologize if the answer to this is somewhere...I've been looking on the web for sometime and can't find an answer to the following problem. I have a Significant Events database that contains network based issues and problems. As problems are detected on the network an SE is issued and published. As the SE records are updated, NEW records are entered into the table and "linked" back to the original. Each update results in a new row. Thus, an SE with two updates would have a total of 3 lines. When the SE gets closed (set the column CLOSED to SYSDATE), only the "original" SE is closed, any updates are left open...aka, the CLOSED column is left null.
That said, I need a way to get the original and/or latest updated SE rows from the table. Thus, I am trying to use a PL/SQL package. The PL/SQL "must" return a REF CURSOR as the results are being passed to a client process.
My initial approach was within a PL/SQL procedure, I have an SQL statement that returns the SE originals. Once in that cursor I need to do the following:
- Attempt to fetch any linked SE rows.
- if no rows then
- add the original to the REF CURSOR.
- else
- find latest SE update
- add latest SE update to REF CURSOR.
- end if
My Question is : How do I manually "add" a row to a REF CURSOR?
If this is not possible, is there a way to populate a REF CURSOR from maybe another construct like:
TYPE ian_se_record is RECORD (
se_id number
,linked_se_id number
,submitted date
,updated date
,closed date
,segroup varchar2(150)
,incident_start_time varchar2(150)
,business_units_affected varchar2(150)
,officenum varchar2(1500)
,sedetails varchar2(4000)
TYPE ian_se_table is table of ian_se_record index by binary_integer;
With the above construct I could:
- Fill ian_se_table with the process described above.
- And finally select off ian_se_table into the REF CURSOR?
Any help would be greatly appreciated,
adym

Hi michaels,
I've put your solution in place, but can't seem to get it to run. The two types were moved out of the package and into real types as you said. Here's the function, for brevity, I've remove some of the less important code:
function ian_se_fetch return sys_refcursor
is
    p_csr_events            sys_refcursor;
    cursor csr_items is
        select
             se_id
    ...removed for brevity...
    /* END : csr_items */
    ian_se_row     ian_se_record;
    ian_se_tbl     ian_se_table;
    l_lng_index    number;
    l_lng_linked   number;
    l_lng_id       number;
begin
     * OPEN : Open the main cursor of originals...
    for the_item in csr_items loop
         * CHECK : Check for any updates to the original...
        l_lng_linked := 0;
        select count(*)
        into l_lng_linked
        from sig_se_t src
        where src.linked_se_id = the_item.se_id;
        l_lng_id := 0;    /* reset the se-id    */
        /* SE original...no linked records yet.    */
        if ( l_lng_linked = 0 ) then
            l_lng_id := the_item.se_id;
        /* SE updates...one or more updates are present.    */
        else
            begin
                select
                     se_id
                into l_lng_id
                from sig_se_t src
                where src.linked_se_id = the_item.se_id
                  and rownum = 1
                order by updated desc; /* latest update    */
            exception
                when too_many_rows then
                    l_lng_id := the_item.se_id;
                when others then
                    l_lng_id := 0;
            end;
        end if;
        if ( l_lng_id != 0 ) then
            select
                 se_id
                ,linked_se_id
                ,submitted
                ,updated
                ,closed
                ,segroup
                ,incident_start_time
                ,business_units_affected
                ,officenum || decode( nvl(impact,'1')
                                  ,'1',''
                                  ,decode(impact
                                      ,'NA', ''
                                      ,':' || impact
                              )                           impact
                ,sedetails
            into ian_se_row.se_id
                ,ian_se_row.linked_se_id
                ,ian_se_row.submitted
                ,ian_se_row.updated
                ,ian_se_row.closed
                ,ian_se_row.segroup
                ,ian_se_row.incident_start_time
                ,ian_se_row.business_units_affected
                ,ian_se_row.officenum
                ,ian_se_row.sedetails
            from sig_se_t src
            where src.se_id = l_lng_id;
            l_lng_index := nvl(ian_se_tbl.last,0)+1;
            ian_se_tbl(l_lng_index).se_id                   := ian_se_row.se_id;
            ian_se_tbl(l_lng_index).linked_se_id            := ian_se_row.linked_se_id;
            ian_se_tbl(l_lng_index).submitted               := ian_se_row.submitted;
            ian_se_tbl(l_lng_index).updated                 := ian_se_row.updated;
            ian_se_tbl(l_lng_index).closed                  := ian_se_row.closed;
            ian_se_tbl(l_lng_index).segroup                 := ian_se_row.segroup;
            ian_se_tbl(l_lng_index).incident_start_time     := ian_se_row.incident_start_time;
            ian_se_tbl(l_lng_index).business_units_affected := ian_se_row.business_units_affected;
            ian_se_tbl(l_lng_index).officenum               := ian_se_row.officenum;
            ian_se_tbl(l_lng_index).sedetails               := ian_se_row.sedetails;
        end if;
    end loop;
     * REF CURSOR : Open the ref cursor on the dataset...
    if ( nvl(ian_se_tbl.last,0) = 0 ) then
        p_csr_events := null;
    else
        open p_csr_events for
        select *
        from table (cast ( ian_se_tbl as ian_se_table ));
    end if;
    return p_csr_events;
end;Here's the test. I keep getting the same error ORA-06530:
SQL> variable v refcursor;
SQL> exec :v:=pkg_ian.ian_se_fetch;
BEGIN :v:=pkg_ian.ian_se_fetch; END;
ERROR at line 1:
ORA-06530: Reference to uninitialized composite
ORA-06512: at "N0002501.PKG_IAN", line 131
ORA-06512: at line 1
SQL> print v
ERROR:
ORA-24338: statement handle not executedOther things I tried:
- The ian_se_fetch() function was a procedure using an in out parameter...same error.
- Wrote a small anonymous block and tried to LOOP/FETCH. Same ORA-06530 error.
P.S. Line 131 of pkg_ian is the SELECT ... INTO ian_se_row.se_id, ...
Any help would be greatly appreciated,
tia,
adym
Message was edited by:
alink

How to out Dynamic ref cursor from Procedure to Forms

Hi
I am trying to out Dynamic ref cursor from Procedure to Forms, But I am unable to do so. however cursor return the value within procedure but I am failed to capture the same in Forms
Pl advice suggestion if any, Here I am attaching full procedure for reference
CREATE PACKAGE winepkg
IS
TYPE wine IS RECORD ( mynumber number);
/* Define the REF CURSOR type. */
TYPE wine_type IS REF CURSOR RETURN wine;
END winepkg;
CREATE procedure find_wine
(col1_in in number,
c1 out winepkg.wine_type) as
vsql varchar2(1000);
cur sys_refcursor;
x number;
BEGIN
vsql:='select bo_id from bo_details where bo_details.bo_id = '||col1_in ;
open cur for vsql;
c1:=cur;
--fetch c1 into x;
--dbms_output.put_line(x);
END find_wine;
In front end forms
Declare
TYPE F is REF CURSOR;
CUR_F F;
rec number;
Begin
break;
find_wine( 1601480000011078,cur_f ) ;
Loop
fetch cur_f into rec ;
Message(rec ) ;pause;
exit when cur_f%notfound ;
End loop ;
exception
when others then
Message(sqlerrm) ;pause;
End ;

yo can use
declare
c_cursor EXEC_SQL.CursType;
v_stmt varchar2(2000) = 'select a, b, c from mytab where cond1'; -- you can create this value dynamically
begin
c_cursor := Exec_SQL.Open_cursor;
EXEC_SQL.PARSE(c_articulos, v_stmt);
EXEC_SQL.DEFINE_COLUMN(c_articulos,1, v_colchar1, 30);
EXEC_SQL.DEFINE_COLUMN(c_articulos,2, v_colchar2, 15);
EXEC_SQL.DEFINE_COLUMN(c_articulos,3, v_colchar3, 30);
v_exec := EXEC_SQL.EXECUTE(c_cursor);
WHILE EXEC_SQL.FETCH_ROWS(c_cursor) > 0 LOOP
EXEC_SQL.COLUMN_VALUE(c_cursor,1,v_colchar1);
EXEC_SQL.COLUMN_VALUE(c_c_cursor,2,v_colchar2);
EXEC_SQL.COLUMN_VALUE(c_c_cursor,3,v_colchar3);
assign_values_to_block;
END LOOP;
EXEC_SQL.CLOSE_CURSOR(c_cursor);
end;
and WORKS IN FORMS 6

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hi everyone,
I have problem in usage of ref cursor in after parameter form. My actual requirement is I have user parameter :p_minval, :p_maxval. The values into these user parameters will be coming dynamically using sql_statement as shown below
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function afterPform return boolean is
type rc is ref cursor;
l_rc rc;
sqlstmt varchar2(512);
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open l_rc for
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return(true);
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thanks & regards
venkat

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Using Ref cursor in Bpel

Hi,
I need to use ref cursors in bpel.
Basically calling a stored proc using DB Adapter , which returns a Ref cursor.
Not able to get it work, any suggestion help is greatly appreciated.
Also followed: http://download.oracle.com/docs/cd/B31017_01/integrate.1013/b28994/adptr_db.htm#CHDDDDJI
But its quite abstract.
Thanks !!

Hi Raj,
I am able to use the REF cursor with BPEL.
I am able to pass the resultset from Database using a REF cursor to a BPEL variable .
When you create a BPEL variable , create it with message type as the output message type of the REF Cursor.
Regards
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