Report regions - use of the Ref Cursor?

Similar Questions

• How to start the view off of the ref cursor Oracle as input/output param

  Hello world

  We use JDev 11.1.2.3 WL 10.3.6 and Java 7.

  We are at the beginning of our transition from Oracle Forms to ADF.  We have a very large forms that uses many store procedures that have IN/OUT ref Cursor parameters and tables plsql.  I tried to find information on best practices to achieve, but only seemed to find tutorials on SEO of the Oracle ref Cursor return functions.  I hope we don't have to rewrite our code of database to work with ADF.

  This is an example of a proc currently a block on a form based on directly

  The ref cursor parameter is input/output to satisfy the way the form handles this type of paradigm.

  ADF we want I hope to reuse these procs existing (without the need to wrap/overload them) on the basis of the display objects.

  Example:

  / * my record type which houses the information I want to go back * /.

  TYPE rec_hist_vacpac_status IS RECORD)

  rec_order NUMBER (5),

  rec_rownum NUMBER (5),

  return_column SAM_VACPAC.vacpac_status%TYPE,

  rec_login_id SAM_VACPAC.ins_user%TYPE,

  status_date SAM_VACPAC.status_date%TYPE

  );

  / * Sets the ref cursor type * /.

  TYPE lcur_hist_vacpac_status IS REF CURSOR;

  / * This is a procedure that would take some info link go / return

  Return the ref cursor of this information as an in / out * /.

  PROCEDURE prc_myinfo_refcur)

  pnum_identify_seq_id in NUMBERS

  pcur_myinfo IN OUT lcur_hist_vacpac_status);

  Can anyone point me in the right direction on documentation on this?

  Thank you!

  Hi Cemerson:

  See this example:

  1. 1. create a TYPE as an object

  CREATE OR REPLACE

  TYPE GOTYOB_EQUI

  AS AN OBJECT

  (

  CDELEM VARCHAR2 (50).

  TIELEM VARCHAR2 (2)

  );

  1. 2. create a TABLE TYPE AS

  CREATE OR REPLACE

  TYPE GOTYTA_EQUI

  AS THE GOTYOB_EQUI TABLE;

  1. 3 create a function, it returns the TYPE of the TABLE

  FUNCTION fn_equiposarriba)

  pa_cdelem IN VARCHAR2,

  pa_nucomp in NUMBERS

  pa_anperi in NUMBERS

  pa_meperi in NUMBERS

  )

  Gotyta_equi RETURN PIPELINED IS

  CURSOR trae_equimani (va_cdelem VARCHAR2) IS

  SELECT cdelem, tielem, cdelempadr,

  (SELECT cdequi

  Of evm_alim

  WHERE anperi = eq.anperi

  AND meperi = eq.meperi

  AND nucomp = eq.nucomp

  AND cdalim = eq.cdalim) cdalim

  Of evm_equimani eq

  WHERE anperi = pa_anperi

  AND meperi = pa_meperi

  AND nucomp = pa_nucomp

  AND cdelem = va_cdelem

  AND cdelempadr <> cdelem

  AND tielem <> 'A ';

  equimani trae_equimani % ROWTYPE;

  va_cdalim VARCHAR2 (100);

  BEGIN

  -Loading los equipos aguas arriba

  WHILE equimani.cdelempadr IS NOT NULL LOOP

  OPEN trae_equimani (equimani.cdelempadr);

  equimani: = NULL;

  SEEK trae_equimani INTO equimani;

  CLOSE Trae_equimani;

  IF equimani.cdelem IS NOT NULL THEN

  PIPE ROW (gotyob_equi (equimani.cdelem, equimani.tielem));

  END IF;

  END LOOP;

  RETURN;

  END;

  1. 4 SQL Query with the help of the function... you can use this SQL in a display object

  SELECT

  *

  Of

  TABLE (gopq_eventos.fn_equiposarriba (' F-SCZ-043-103', '))

  1,

  2013,

  6

  )

  )

  Best regards, Marcelo

• Return of the ref cursor of procedure where the cursor is defined in the specification

  Hello
  
  Here's pseudo-code
  
  create or replace package test
  as
  cursor c_emp (number cv_emp_id)
  is
  Select emp_name emp where emp_id = cv_emp_id;
  
  type ref_c is ref cursor;
  
  function get_emp_name (number p_emp_id) return ref_c;
  end test;
  /
  
  
  create or replace the test physics package
  as
  ref_c function get_emp_name (number p_emp_id)
  is
  ret_val ref_c;
  Start
  Open c_emp (p_emp_id);
  ret_val: = c_emp;
  return ret_val;
  
  end get_emp_name;
  end test;
  /
  
  Returns me "PLS-00382: expression is of the wrong type. I tried to use a strongly typed Ref cursor based on the cursor, but nothing helped.
  
  Clearly, I understand something... and if I can't assign as ' ret_val: = c_emp "and if there is another key way it so please let me know.
  
  Thank you
  
  Ralph
  
  Published by: user13024707 on May 5, 2010 04:43

  user13024707 wrote:
  Clearly the point of my question is being missed.

  Or maybe the question is not been clearly asked. ;)

  I want to set the cursor in the PACKAGE SPECIFICATION, and not in the package body. The issue of the bind variable and the string is neither here nor there because I pass parameters to the cursor.

  What you ask is to use a PL/SQL cursor (defined in the specifications of the package or elsewhere) and that convert a Ref Cursor. N ° cannot be done.
  PL/SQL cursors should be used in the PL/SQL code. REF CURSOR is primary used to pass back a reference to a cursor (and all queries are cursors) to a layer of application outside of PL/SQL for example .net, java, etc.. Once you start using the ref Cursor only really, you have the choice of opening it based on a (dynamic) or a fixed query string as in the examples given. You cannot open a cursor of a PL/SQL cursor definition Ref.

  The difference is that when you do:

    CURSOR cur_mycursor IS
      SELECT ...
  

  you declare a cursor in pl/sql definition, not actually a slider itself. The cursor itself is created when you issue an OPENING or a statement FOR etc. So a Ref Cursor (reference to a slider) cannot refer to the definition of the cursor because it is only a definition, not a cursor (i.e. it has not been sent engine sql and instantiated at that time here). Instead the Ref Cursor must reference a cursor (query), itself, and that may be presented as a string or as the query itself that is issued against the sql engine and then the ref cursor points

  Thus, slider ref and PL/SQL cursors are different concepts, both designed to manage cursors in a slightly different way of programming. You cannot mix them.

• help how to extract the ref cursor in the table field

  Hello.
  
  
  I have a query similar to the following:

  select department_id, cursor (select employee_id from employees where department_id = d.department_id)
    from departments d

  Expecting to get several lines, I want this select this option to be in bulk sampled in a table variable nested (of another type of nested table) which is copied to an out parameter in a procedure. I have some doubts:
  1 should. what I create the column in the inner nested table that will keep the result of the ref cursor? Ref cursor colunm? A sort of column Adrien?
  2. If the column in the nested table inside that will keep the result of the ref cursor is another array, how can I write the result of the entire query in a single volume?
  
  (I want to bulk collect everything in a single query, I know how to do with pl/sql do not inflate but using two nested for loops, that's what I try to avoid).
  
  
  Thanks in advance.

  It would be simpler:

  declare
      type dep_emp_list_tbl_type
        is table of sys.OdciVarchar2List;
      v_dep_emp_list_tbl dep_emp_list_tbl_type;
      v_dep_id_tbl sys.OdciNumberList;
  begin
      select  department_id, cast(multiset(select employee_id from hr.employees where department_id = d.department_id) as sys.OdciVarchar2List)
        bulk collect into v_dep_id_tbl,v_dep_emp_list_tbl
        from hr.departments d;
  end;
  /
  

  SY.

• Fetch the Ref Cursor several times

  create or replace 
  PROCEDURE refcursor1
  AS
  TYPE r_cursor IS REF CURSOR;
  rcv_emp r_cursor;
  TYPE rec_emp IS record
  (
  empno NUMBER,
  ename VARCHAR2(20 CHAR),
  deptno number
  );
  recv_emp rec_emp;
  recv_emp2 rec_emp;
  -------------------------------------------------------
  PROCEDURE printemployeedetails AS
  BEGIN
    loop
    fetch rcv_emp INTO recv_emp;
    exit WHEN rcv_emp%notfound;
      dbms_output.put_line(recv_emp.empno||'-'||recv_emp.ename||'-'||recv_emp.deptno);
    END loop;
  END;
  -------------------------------------------------------
  PROCEDURE printemployeedetails2(p_emp r_cursor) IS
  BEGIN
    loop
    fetch p_emp INTO recv_emp2;
    exit WHEN p_emp%notfound;
      dbms_output.put_line(recv_emp2.empno||'-'||recv_emp2.ename||'-'||recv_emp2.deptno);
    end loop;
  END;
  -------------------------------------------------------
  BEGIN
    FOR i IN (SELECT deptno FROM dept order by deptno)
    loop
      OPEN rcv_emp FOR SELECT empno,ename,deptno FROM emp WHERE deptno=i.deptno;
      dbms_output.put_line(i.deptno);
      dbms_output.put_line('--------------------');
      dbms_output.put_line('calling printemployeedetails');
      printemployeedetails;
      dbms_output.put_line('                    ');
      dbms_output.put_line('calling printemployeedetails2');
      dbms_output.put_line('                    ');
      printemployeedetails2(rcv_emp);
      CLOSE rcv_emp;
    END loop;
  end;
  

  Output:

  10
  --------------------
  calling printemployeedetails
  7839-KING-10
  7782-CLARK-10
  7934-MILLER-10
                      
  calling printemployeedetails2
                      
  20
  --------------------
  calling printemployeedetails
  7566-JONES-20
  7788-SCOTT-20
  7902-FORD-20
  7369-SMITH-20
  7876-ADAMS-20
                      
  calling printemployeedetails2
                      
  30
  --------------------
  calling printemployeedetails
  7698-BLAKE-30
  7499-ALLEN-30
  7521-WARD-30
  7654-MARTIN-30
  7844-TURNER-30
  7900-JAMES-30
                      
  calling printemployeedetails2
                      
  40
  --------------------
  calling printemployeedetails
                      
  calling printemployeedetails2
                      
  
  

  Hi all

  If I open a cursor once can I collect the elements of a cursor n times as above? I see one of these procedures to print the details, but not both.

  Wonder why that I'm passing same ref cursor to a second procedure.

  It doesn't throw me an error indicating that the elements of the ref cursor is already read.

  Thank you.

  Your condition is not clear. Cursor is a pointer. He points to the result set of your query. At the time wherever you collect once, it advances the pointer to the next line and so on. I wonder if the pointer can return to the previous line once you recovered.

• Initialize the Ref Cursor to avoid ORA-01001: Invalid cursor

  Hello
  
  I write a stored procedure that returns a REF CURSOR. However, there are times when the cursor is not open if certain conditions are not met, so I wonder if there is a way to initialize the REF CURSOR so that the appellant does not receive the "ORA-01001: Invalid cursor" error when you try to work with the cursor, if it has not been opened.
  
  Any help is greatly appreciated...
  
  Thank you
  Christine

  cad0227 wrote:
  Hello

  I write a stored procedure that returns a REF CURSOR. However, there are times when the cursor is not open if certain conditions are not met, so I wonder if there is a way to initialize the REF CURSOR so that the appellant does not receive the "ORA-01001: Invalid cursor" error when you try to work with the cursor, if it has not been opened.

  Any help is greatly appreciated...

  Thank you
  Christine

  The most appropriate way would be the caller to handle the situation. The caller must capture the exception of INVALID_CURSOR and do what is necessary.

  Other suggestions like having a separate Pavilion or a model select all will lead the appellant to act to the particular situation, that slider is not being opened. What is the case with the exception of INVALID_CURSOR raised by oracle.

  All the need for the appellant to do is manage the exception of INVALID_CURSOR and you should be good. And also INVALID_CURSOR is not a mistake, it's an exception that has a special meaning for her. In the case you sense it takes the condition when not together to return a cursor.

• What is the difference between the ref cursor and the sys_refcursor.

  create or replace procedure GetEmployeesInDept (c sys_refcursor)
  
  Hello
  
  
  I have a query related to the above stored procedures.
  When you set the cursor, we mentioned as sys_refcursor and in some US sites I saw him as a REF CURSOR as shown
  
  create or replace procedure GetEmployeesInDept (Ref Cursor c)
  
  
  Please tell me what is the difference between the ref cursor and the sys_refcursor.

  http://download.Oracle.com/docs/CD/B19306_01/AppDev.102/b14261/tuning.htm#sthref2376

  Concerning

  Etbin

• How print/store in the ref cursor block pl/sql folder?

  How print/store in the ref cursor block pl/sql folder?

  return to the SQL * the method I showed above:

  SQL> create or replace procedure test (p_refcur out sys_refcursor)
    2  is
    3  begin
    4    open p_refcur for select * from dual union all select * from dual;
    5  end test;
    6  /
  
  Procedure created.
  
  SQL> var r refcursor;
  SQL> begin
    2    test(:r);
    3  end;
    4  /
  
  PL/SQL procedure successfully completed.
  
  SQL> print r;
  
  D
  -
  X
  X
  
  2 rows selected.
  

• Is it possible to combine dynamic &amp; static queries in the ref cursor?

  Hi all
  
  I was wondering if it is possible to combine dynamic & static queries in the ref-cursor?
  

  CREATE OR REPLACE FUNCTION dynamic_static_kk
     RETURN sys_refcursor
  AS
     o_cursor   sys_refcursor;
  BEGIN
    open 'select 1 fom dual'
         union
         select 2 from dual;
  
     RETURN o_cursor;
  END;

  In the existing code, the two parts of the query are static, but I need to improve & replacement of part would do the trick.
  
  So, I was wondering if it is possible to keep the static part 2. Of course, do both dynamic parts seems the only possible treatment for me.

  So, I was wondering if it is possible to keep the static part 2.

  No, you can't.

  Of course, do both dynamic parts seems the only possible treatment for me.

  Yes, it's the only way.

• Recovery of the records by using the Ref Cursor or indexes per Table (which is better)

  Hi all
  
  I am interested to know if there is a performance (or other) advantages to return a result set from an Oracle stored procedure for a client application (for example, in Java) by using a Ref Cursor or Index by Table, respectively. Most of the people I met who know Java seem to use a Ref Cursor but did not say why this method is preferable. I'm not too familiar with Java and do not have the opportunity to test the difference between either method, but I am very interested in the other user forum about this view, gauging
  
  Kind regards
  
  Kevin.

  KevinFitz wrote:
  Hi zerathul,

  Thanks for the quick and helpful response. A REF CURSOR would be the best solution if the same set of results (content and number of records returned) should be dealt with by the application of the 'customer '. I'm guessing that maybe in this situation 'theoretical' that there might be less network traffic to return the set of results through an associative array,

  Kind regards

  Kevin.

  Yes, it would always be the best solution, because an associative array would mean collecting all the data in memory of expensive PGA on the database server before they pass any return on the network, while a fair Ref cursor is to feed the data over the network (maybe a little extra load, but you were unlikely to notice). Also the client application would treat a ref as of rows returned cursor data recovery and could treat them upon their arrival, an associative array is a collection of data which will then be entirely spent before any treatment could be done and then the treatment should go through the entire table to do.

  REF CURSOR will also provide other information such as the error codes etc regarding SQL if necessary. If you get an error when filling a table on the side of the database, it is not so easy to recover this error to the client.

  REF CURSOR is designed for this purpose. Use them.

• How to implement reports region 100% to the universal theme?

  Theme 26 a model "reports 100% region. We use this model to the traditional reports. During the passage of our application to universal theme, we lose the horizontal (width 100%) portion of the classic reporting regions. How can we restore the classic reports area to the full stretch at the universal theme?

  user12045295 wrote:

  Please update your forum profile with a recognizable username instead of "user12045295": Video tutorial how to change username available

  Theme 26 a model "reports 100% region. We use this model to the traditional reports. During the passage of our application to universal theme, we lose the horizontal (width 100%) portion of the classic reporting regions. How can we restore the classic reports area to the full stretch at the universal theme?

  Select the report of stretching in the model of Report Options.

• By the way the Ref cursor to the subprogrammes-taking islet of time to return

  Hello
  Version Oracle 11.2.0.1
  
  I test the way other Ref Cursor sub programs using examples of schema scott. Please see below for the code.
  

  create or replace package typ_ref_cursor_pkg
  as
  Type t_ref_cursor is REF CURSOR;
  end typ_ref_cursor_pkg;
  
  /
  
  
  create or replace package emp_info_pkg
  is
  Type rec_emp is record
    (
      name  emp.ename%TYPE,
      sal   emp.sal%Type
    );
  l_emp_rec rec_emp;
  Procedure get_emp_salary(p_cursor typ_ref_cursor_pkg.t_ref_cursor);
  Procedure get_emp_by_dept(p_deptno emp.deptno%type);
  end emp_info_pkg;
  /
  
  
  create or replace package body emp_info_pkg
  is
  Procedure get_emp_salary(p_cursor typ_ref_cursor_pkg.t_ref_cursor)
  is 
  begin 
  Loop
  Fetch p_cursor into l_emp_rec;
  exit when p_cursor%NOTFOUND;
  DBMS_OUTPUT.PUT_LINE(l_emp_rec.name||' - '||l_emp_rec.sal);
  end Loop;
  End get_emp_salary;
  
  Procedure get_emp_by_dept(p_deptno emp.deptno%type)
  is
  v_emp typ_ref_cursor_pkg.t_ref_cursor;
  Begin 
  open v_emp for select ename,sal from emp where deptno=p_deptno;
  LOOP
  get_emp_salary(v_emp);
  END LOOP;
  close v_emp;
  END get_emp_by_dept;
  END emp_info_pkg;
  /

  Everything compiled fine.while execution of the procedure taking a lot of time.
  

  execute emp_info_pkg.get_emp_by_dept(10);

  what I am doing wrong? Could you point me to the right direction?
  
  Thank you
  SG

  Sg049 wrote:
  Everything compiled fine.while execution of the procedure taking a lot of time.

  execute emp_info_pkg.get_emp_by_dept(10);
  

  How long is a long time? Is the code you have posted takes a lot of time, or is it just a case of quick test that works quickly?

  Start by checking the SQL code. Get an execution plan for SQL that you run and see if you do a scan of the complete table on the table - if so an index on deptno could help.

  I think you have an endless loop in get_emp_by_dept. I was unable to see a way out the manual of the WHILE loop.

• Retrieve the Ref cursor data

  Hello
  
  Here is the plsql code, I try to extract the data from the refcursor
  
  Declare
  number of l_ecg_id_in;
  number of l_error_code_out;
  l_cur_out sys_refcursor;
  Begin
  
  l_ecg_id_in: = 1249551;
  
  -Call the procedure
  pkg_dispatch.sp_getecgreport (p_ecg_id_in = > l_ecg_id_in,)
  p_cur_out = > l_cur_out, / / p_cur_out is back refcursor datat
  p_error_code_out = > l_error_code_out);
  
  
  Now my requirement is data retrieves in l_cur_out have too many columns, the columns are mentioned below.
  HUMAN RESOURCES
  PR
  DR
  BATTERY
  ETC.
  
  I want to just HR to be extacted in a variable or a collection of type
  
  We can extract a particular of ref cursor column, please suggest me
  
  
  
  End;

  Sudhir_Bangalore wrote:

  Now my requirement is data retrieves in l_cur_out have too many columns, the columns are mentioned below.
  HUMAN RESOURCES
  PR
  DR
  BATTERY
  ETC.

  I want to just HR to be extacted in a variable or a collection of type

  Then, you use the wrong cursor and you performance degradation because the cursor returns data that is not required.

  We can extract a particular of ref cursor column, please suggest me

  You can not.

  Workaround would be to copy the handle of the cursor ref to a handle to the cursor DBMS_SQL and then use cursor DBMS_SQL to treat the projection of SQL. But it would be an ugly hack.

  The right approach would be to correctly use the SQL cursors in PL/SQL. And no, ref Cursor in PL/SQL (created by code PL/SQL to PL/SQL code) is almost always the WRONG choice.

  There are better native cursor data types in PL/SQL in particular supported cursors created by PL/SQL and PL/SQL.

  REF CURSOR is provided mainly as the cursors created by PL/SQL for an external client. There are very few reasons to create Ref cursors to use PL/SQL code.

• Converts the ref cursor effect of function table

  I have a function named fn_get_emp(), whose return type is sys_refcursor. When I select fn_get_emp of double; I get the output to the format of the cursor. I want to convert to the table like format so that I can use in my insert statements insert into foo select * from fn_get_emp();
  
  Please note that the columns in the output of the fn_get_emp() is not fixed.
  
  Published by: user10566312 on January 30, 2012 22:25

  Here are the steps in the package DBMS_SQL, you need to turn your Ref Cursor a cursor DBMS_SQL.

  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e25788/d_sql.htm#CHDJDGDG

  and then the rest of the documentation of the DBMS_SQL package gives many examples of how to treat this a cursor dbms_sql.

  Here is an example to use the package dbms_sql to process a request and produce some projection of sql and the database is in the query to CSV file...

  As user sys:

  CREATE OR REPLACE DIRECTORY TEST_DIR AS '\tmp\myfiles'
  /
  GRANT READ, WRITE ON DIRECTORY TEST_DIR TO myuser
  /
  

  As myuser:

  CREATE OR REPLACE PROCEDURE run_query(p_sql IN VARCHAR2
                                       ,p_dir IN VARCHAR2
                                       ,p_header_file IN VARCHAR2
                                       ,p_data_file IN VARCHAR2 := NULL) IS
    v_finaltxt  VARCHAR2(4000);
    v_v_val     VARCHAR2(4000);
    v_n_val     NUMBER;
    v_d_val     DATE;
    v_ret       NUMBER;
    c           NUMBER;
    d           NUMBER;
    col_cnt     INTEGER;
    f           BOOLEAN;
    rec_tab     DBMS_SQL.DESC_TAB;
    col_num     NUMBER;
    v_fh        UTL_FILE.FILE_TYPE;
    v_samefile  BOOLEAN := (NVL(p_data_file,p_header_file) = p_header_file);
  BEGIN
    c := DBMS_SQL.OPEN_CURSOR;
    DBMS_SQL.PARSE(c, p_sql, DBMS_SQL.NATIVE);
    d := DBMS_SQL.EXECUTE(c);
    DBMS_SQL.DESCRIBE_COLUMNS(c, col_cnt, rec_tab);
    FOR j in 1..col_cnt
    LOOP
      CASE rec_tab(j).col_type
        WHEN 1 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000);
        WHEN 2 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_n_val);
        WHEN 12 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_d_val);
      ELSE
        DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000);
      END CASE;
    END LOOP;
    -- This part outputs the HEADER
    v_fh := UTL_FILE.FOPEN(upper(p_dir),p_header_file,'w',32767);
    FOR j in 1..col_cnt
    LOOP
      v_finaltxt := ltrim(v_finaltxt||','||lower(rec_tab(j).col_name),',');
    END LOOP;
    --  DBMS_OUTPUT.PUT_LINE(v_finaltxt);
    UTL_FILE.PUT_LINE(v_fh, v_finaltxt);
    IF NOT v_samefile THEN
      UTL_FILE.FCLOSE(v_fh);
    END IF;
    --
    -- This part outputs the DATA
    IF NOT v_samefile THEN
      v_fh := UTL_FILE.FOPEN(upper(p_dir),p_data_file,'w',32767);
    END IF;
    LOOP
      v_ret := DBMS_SQL.FETCH_ROWS(c);
      EXIT WHEN v_ret = 0;
      v_finaltxt := NULL;
      FOR j in 1..col_cnt
      LOOP
        CASE rec_tab(j).col_type
          WHEN 1 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_v_val);
                      v_finaltxt := ltrim(v_finaltxt||',"'||v_v_val||'"',',');
          WHEN 2 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_n_val);
                      v_finaltxt := ltrim(v_finaltxt||','||v_n_val,',');
          WHEN 12 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_d_val);
                      v_finaltxt := ltrim(v_finaltxt||','||to_char(v_d_val,'DD/MM/YYYY HH24:MI:SS'),',');
        ELSE
          v_finaltxt := ltrim(v_finaltxt||',"'||v_v_val||'"',',');
        END CASE;
      END LOOP;
    --  DBMS_OUTPUT.PUT_LINE(v_finaltxt);
      UTL_FILE.PUT_LINE(v_fh, v_finaltxt);
    END LOOP;
    UTL_FILE.FCLOSE(v_fh);
    DBMS_SQL.CLOSE_CURSOR(c);
  END;
  

  This allows the header line and the data to write into files separate if necessary.

  for example

  SQL> exec run_query('select * from emp','TEST_DIR','output.txt');
  
  PL/SQL procedure successfully completed.
  

  Output.txt file contains:

  empno,ename,job,mgr,hiredate,sal,comm,deptno
  7369,"SMITH","CLERK",7902,17/12/1980 00:00:00,800,,20
  7499,"ALLEN","SALESMAN",7698,20/02/1981 00:00:00,1600,300,30
  7521,"WARD","SALESMAN",7698,22/02/1981 00:00:00,1250,500,30
  7566,"JONES","MANAGER",7839,02/04/1981 00:00:00,2975,,20
  7654,"MARTIN","SALESMAN",7698,28/09/1981 00:00:00,1250,1400,30
  7698,"BLAKE","MANAGER",7839,01/05/1981 00:00:00,2850,,30
  7782,"CLARK","MANAGER",7839,09/06/1981 00:00:00,2450,,10
  7788,"SCOTT","ANALYST",7566,19/04/1987 00:00:00,3000,,20
  7839,"KING","PRESIDENT",,17/11/1981 00:00:00,5000,,10
  7844,"TURNER","SALESMAN",7698,08/09/1981 00:00:00,1500,0,30
  7876,"ADAMS","CLERK",7788,23/05/1987 00:00:00,1100,,20
  7900,"JAMES","CLERK",7698,03/12/1981 00:00:00,950,,30
  7902,"FORD","ANALYST",7566,03/12/1981 00:00:00,3000,,20
  7934,"MILLER","CLERK",7782,23/01/1982 00:00:00,1300,,10
  

  The procedure allows for the header and the data to separate files if necessary. Just by specifying the file name "header" will put the header and the data in a single file.

  Adapt to the exit of styles and different types of data are needed.

• Best approach - whether to return Collections or the Ref Cursor?

  I have the table that the column is a nested table (column address) type. Now, I want to fill the same
  in a jsp page.
  
  As his collection type I am thinking to send variable Collection to front-end. And most of java professionals
  argue that the collections are the best approach.
  
  But here, in a lot of posts, I read that collections at the front end is the worst approach and it degrades performance
  and increases the load.
  
  But java assert that even if connection fails they can always display the data as the data set is with them
  How to get a set of results COLLECTION.
  
  As ref cursor is just a pointer to the real cursor lies in the comics... they're going to make one record of the other instead and once the connection is lost... they can no longer display the data. This assertion seems
  to be reasonable!
  
  How you condemn it? and prove ref Cursor is good way?
  
  
  Here's the example scenario that I have with me.
  

  create type t_adress is object(t_h_no varchar2(500),t_pin_code number);
   /
   
   create type t_address_tbl is table of t_adress;
   /
   
   create table r_dummy (emp_name varchar2(200),emp_id number,emp_address t_address_tbl)
   nested table emp_address store as emp_address_tbl;
   
   insert into r_dummy values('raghu',1,t_address_tbl(t_adress('598',500035),t_adress('600',500036)))
   
   insert into r_dummy values('raghu nadh',2,t_address_tbl(t_adress('598',500035),t_adress('600',500036)))

  Using the Collection
  

  Create or replace procedure p_using_col
   (
   p_emp_id          in     r_dummy.emp_name%type,
   p_emp_dtls          out     t_address_tbl
   )
   is
   begin
            Select     t_adress(cl.t_h_no,cl.t_pin_code)
            bulk collect into p_emp_dtls
            from     r_dummy,table(emp_address) cl
            where     emp_id = p_emp_id;
   
   end;
   /
   
   set serveroutput on;
   declare
            l_emp_id          r_dummy.emp_name%type := 1;
            l_emp_dtls          t_address_tbl;
   begin
            p_using_col(l_emp_id,l_emp_dtls);
            
            for i in 1..l_emp_dtls.count
            loop
            
                 dbms_output.put_line(l_emp_dtls(i).t_h_no);
            
            
            
            
            end loop;
   
   
   end;

  Using Ref Cursor
  

  Create or replace procedure p_using_ref
   (
   p_emp_id          in     r_dummy.emp_name%type,
   p_emp_dtls          out     sys_refcursor
   )
   is
   begin
            Open p_emp_dtls for
                 Select     cl.t_h_no,cl.t_pin_code
                 from     r_dummy,table(emp_address) cl
                 where     emp_id = p_emp_id;
   
   end;
   /
   
   set serveroutput on;
   declare
            l_emp_id          r_dummy.emp_name%type := 1;
            l_emp_dtls          sys_refcursor;
            
            l_h_no               varchar2(500);
            l_pin_code          number;
            
            
   begin
            p_using_ref(l_emp_id,l_emp_dtls);
            
                 loop
                      fetch l_emp_dtls into l_h_no,l_pin_code;
                      
                      exit when l_emp_dtls%notfound;
                      dbms_output.put_line(l_h_no||'    '||l_pin_code);
                 
                 
                 end loop;
            
                 close l_emp_dtls;
   end;

  Concerning
  RUSSO

  RUSSO says:
  I would like to know what really happens behind the screen IE in PGA... when we return collections...

  A collection is a PL/SQL variable. Like all PL/SQL variables, it resides in the global area of the server process that executes PL/SQL code. This memory is part of the process the process's private memory.

  If need more memory, more memory server be malloc' ed by the process.

  As he is dedicated and private memory, no other process can reap the benefits of this memory in use. It is not 'ideal' - shared memory however benefits all the processes that are involved in sharing that allocated the memory. As is the case with the SGA

  How long my set of data will reside in the PGA? He immediately fade after returning to the calling procedure? and how it degrades performance. Help me with a good link.

  Assume that you create a collection of 10 MB. The process server malloc' ed 10 MB of server memory. The PGA has thus extended.

  When your code executes the variable usage (it is out of reach of runtime), the PL/SQL engine can theoretically free up 10 MB of memory. However, it may have allocated 4 KB memory after this assignment of 10 MB. Only 4 KB is still in use. This moment results in that the process cannot shrink its allocated memory - as this free piece of 10 MB is slapbang in the middle of the used memory space.

  PGA memory is 'expensive' because it's not shared memory is private, with only the current process. PGA in memory is not so easy to decline. Memory management is a complex issue and you who ceases to use a large part of the PGA memory almost never means that this memory suddenly become free and available for other processes to use.

  Also, you have to ask yourself why you want to copy data from disk blocks into the SGA buffer (for SQL procedures) cache, then copy these data blocks of APG in the PGA (using a collection and extraction in bulk) and then copy this PGA memory on the network to the client process (TOAD or .net or Java or whatever).

  It's a lot of moving parts - which increases the complexity, lowers the performance and scalability and ups the risk of something going wrong due to the increased complexity.

  It is much simpler and much stronger, to maintain the number of moving parts to a minimum. For example to copy data directly from cache buffers of the SGA to the customer via a ref cursor