Converts the ref cursor effect of function table

Similar Questions

• 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.

• 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.

• 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

• How to pass a REF CURSOR from a function

  I tried to compile the following function:
  
  CREATE or REPLACE FUNCTION example
  RETURN REFCURSOR
  IS
  heart REFCURSOR;
  BEGIN
  OPEN FOR heart
  "SELECT x FROM table";
  RETURN cur;.
  END;
  
  but I get:
  
  PLS-00201: identifier 'REFCURSOR' must be declared.
  
  Can you help me in the right syntax? I never return a REF CURSOR to a function.
  Is my Version of Oracle 8.1.7
  
  Thank you!

  You cannot use SYS_REFCURSOR in Oracle 8i.
  The work is approximately as follows

  create or replace package my_pk as
  type my_cur is REF CURSOR;
  end my_pk;
  
  -- Now write your function
  create or replace function my_func return my_pk.my_cur
  as
  l_cur my_pk.my_cur;
  begin
  open l_cur for select * from table_name;
  return l_cur;
  end my_func;
  

  Thank you
  Andy

• 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.

• Report regions - use of the Ref Cursor?

  APEX 4.2

  See http://mikesmithers.wordpress.com/2012/02/22/getting-apex-to-play-with-ref-cursors

  The above article is older than 2 years. The techniques shown in the link above still valid today if we want to create a report region in the APEX are based on a function that returns a Ref Cursor? Are there improvements in this area for the next APEX 5.0 and/or database Oracle 12 c?

  Thank you

  HELEN wrote:

  APEX 4.2

  See http://mikesmithers.wordpress.com/2012/02/22/getting-apex-to-play-with-ref-cursors

  The above article is older than 2 years. The techniques shown in the link above still valid today if we want to create a report region in the APEX are based on a function that returns a Ref Cursor?

  If the function returns the ref cursor is the only point of access that you have data then Yes, it probably is. If you have direct access to the underlying database objects and the function does not have something very complicated, then you are probably better off creating your own body of the function returning SQL query data source.

  Everything about the dynamics of ref Cursor now I divided in 2 layers, with a function for generating the dynamic SQL and another for bind parameters open the ref cursor. APEX apps can then reuse the functions of SQL query in function body return SQL query data sources (if you take a bit of care to keep the bind variable names vaguely APEX-point-friendly).

  Are there improvements in this area for the next APEX 5.0 and/or database Oracle 12 c?

  See this for the technical background on why APEX is not yet support ref Cursor and this for more information of the Oracle team on the possibility of future support. Obviously, he did not he in 4.1. I suspect that data REF CURSOR region sources depended on a minimum requirement of DB of the 11.1.0.6 (where was introduced support for the conversion of the REF CURSOR in the cursors DBMS_SQL). As minimum DB for APEX 5.0 version is 11.1.0.7, it would be a possible feature for 5.0, but it is not classified as one.

• 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.

• 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.
  

• Pipelined table vs ref cursor in a function return

  Hi gurus,
  
  Everybody has discovered that a (subject) is faster on the other? Data will be primarily consumed from an external application (.net). What are the benefits? I can't decide if that use is
  
  Thank you very much.

  user12868294 wrote:
  Hi gurus,

  Everybody has discovered that a (subject) is faster on the other? Data will be primarily consumed from an external application (.net). What are the benefits? I can't decide if that use is

  Thank you very much.

  They are two different things.

  A pipeline table acts as an array, but you must always choose in it and so if your consumption that in .net, you would still use a Ref Cursor I guess to query this table in pipeline (I guess .net is not query the tables directly, but must use some sort of slider Ref?)

  Tables in pipeline can be fast, but it depends on what you need to. Is there a reason why you really need a feature in pipeline? If this is not the case, just use a normal query with a Ref Cursor, so your .net application only retrieves the data properly.

• Insert data from variables in the Ref Cursor

  I do not know how to return data from ref cursor variables That's what I've tried so far...
  

  CREATE OR REPLACE type num_obj as object (
    t_number number ,
    t_type varchar2(10) ,
    t_desc varchar2(40)
  ); 
  CREATE OR REPLACE type num_table as table of num_obj; 
  
  procedure get_all_data(p_p1 in varchar2, p_rc OUT SYS_REFCURSOR) is
     l_dat1 number := 2;
     l_dat2 varchar2(10);
     l_dat3 varchar2(40);
     t_num_o num_obj;
     t_num_t num_table;
  begin
    for l_indx in 1..5 loop
       l_dat1 := l_dat1 + l_indx;
       if ( mod(l_dat1,2)=0) then
         l_dat2 := 'EVEN';
       else
         l_dat2 := 'ODD';
       end if;
       l_dat3 := 'Number ' || l_dat1 || ' is ' || l_dat2 || ' number'; 
       l_num_o := num_obj (l_dat1, l_dat2, l_dat3);
       l_num_t := num_table(l_num_o);
    end loop;
    open p_rc for select * from table(l_num_t);
    close p_rc;
  end;

  At the end, to achieve this in Ref Cursor:

  t_number | t_type | t_desc
  ---------------------------------------
  3        | ODD    | Number 3 is ODD number
  5        | ODD    | Number 5 is ODD number
  8        | EVEN   | Number 8 is EVEN number
  12      | EVEN    | Number 12 is EVEN number
  17      | ODD     | Number 17 is ODD number

  Can something like that, where I did wrong?
  
  BTW. I did this with the function in pipeline, now I want to try a different method.

  The refcursor can not be closed in the procedure - you must return refcursor open to the appellant.
  the appellant must read and then close it.
  There are also some errors in the names of variables and an assignment to the collection.

  Try this version:

  CREATE OR REPLACE
  PROCEDURE GET_ALL_DATA(P_P1 IN VARCHAR2, P_RC OUT SYS_REFCURSOR) IS
     l_dat1 number := 2;
     l_dat2 varchar2(10);
     L_DAT3 VARCHAR2(40);
     L_NUM_O NUM_OBJ;
     l_num_t num_table := num_table() ;
  BEGIN
    for l_indx in 1..5 loop
       l_dat1 := l_dat1 + l_indx;
       if ( mod(l_dat1,2)=0) then
         l_dat2 := 'EVEN';
       else
         l_dat2 := 'ODD';
       end if;
       l_dat3 := 'Number ' || l_dat1 || ' is ' || l_dat2 || ' number';
       L_NUM_O := NUM_OBJ (L_DAT1, L_DAT2, L_DAT3);
       L_NUM_T.EXTEND;
       l_num_t( l_indx ) := l_num_o;
    end loop;
    OPEN P_RC FOR SELECT * FROM TABLE(L_NUM_T);
  END;
  /
  

  SQL> variable xx refcursor
  SQL> execute GET_ALL_DATA( '', :xx );
  
  PL/SQL procedure successfully completed.
  
  SQL> print :xx
  
    T_NUMBER T_TYPE     T_DESC
  ---------- ---------- ----------------------------------------
        3 ODD           Number 3 is ODD number
        5 ODD           Number 5 is ODD number
        8 EVEN       Number 8 is EVEN number
       12 EVEN       Number 12 is EVEN number
       17 ODD           Number 17 is ODD number
  

• 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.