JDBC 2.0 - Dynamic cursors

Hi,
I am trying to create a cursor, and i need to use some
features of JDBC 2 like "scrolling backwards" and updating
data from cursor relative position, but
i got an exception, and e.printStack() infromed me
this feature was not "yet" implemented.
// ResultSet.afterLast() and ResultSet.previous()
// raise an SQLException
Is there any update that can "already" do it
(FULL JDBC 2 implementation )?
I would like to have it for 8.1.5/Solaris AND Lite/Win.
Regards,
Txr
null

Jose,
Openlink Software provides full JDBC 2.0 compliancy - visit
http://www.openlinksw.com for more information. Pay particular
attention to the RowSetDemo applet if you download; Openlink's
Rowset class will provide the functionality you require. All
demos provide source code for your adapting purposes.
Good luck!
Jose Teixeira (guest) wrote:
: Hi,
: I am trying to create a cursor, and i need to use some
: features of JDBC 2 like "scrolling backwards" and updating
: data from cursor relative position, but
: i got an exception, and e.printStack() infromed me
: this feature was not "yet" implemented.
: // ResultSet.afterLast() and ResultSet.previous()
: // raise an SQLException
: Is there any update that can "already" do it
: (FULL JDBC 2 implementation )?
: I would like to have it for 8.1.5/Solaris AND Lite/Win.
: Regards,
: Txr
null

Similar Messages

Dynamic Cursor in a procedure

Hi,
I am using 10g and wanted to check if we can use a dynamic cursor in a procedure.
Following is my code and wanted to see if that can work with every query passed as a parameter.
example ,
exec test1 ('select col1, col2, col3 from table1','Two columns Sql')
exec test1 ('select col1 from table2','one columns Sql')
exec test1 ('select col1, col2, col3, col4, col5 from table3','Five columns Sql')
CREATE OR REPLACE procedure test1 (p_sql IN VARCHAR2, p_subject IN VARCHAR2
is
v_cu_string       VARCHAR2(2000);
v_string          VARCHAR2(2000);
v_sql             VARCHAR2(4000);
v_head            VARCHAR2(4000);
v_head_sql        VARCHAR2(4000);
v_str_sql         VARCHAR2(4000);
      TYPE cv_typ IS REF CURSOR;
      cv cv_typ;
begin
v_sql := p_sql;
    OPEN cv FOR v_sql;
       LOOP
         FETCH cv INTO v_cu_string;
         EXIT WHEN cv%NOTFOUND;
        ------ Processing steps
      END LOOP;
      CLOSE cv;
END;Thanks

user527060 wrote:
Following is my code and wanted to see if that can work with every query passed as a parameter.
Just curious as to why this is an improvement of
exec test1 ('select col1, col2, col3 from table1','Two columns Sql')
select col1, col2, col3 from table1And
exec test1 ('select col1 from table2','one columns Sql')
select col1 from table2And
exec test1 ('select col1, col2, col3, col4, col5 from table3','Five columns Sql')
select col1, col2, col3, col4, col5 from table3It needs more code from you to build, more code for anyone to enter to execute, limits selects to only one table I would guess also comes with less documentation than SQL.
http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/toc.htm

Dynamic cursor definition in PL/SQL

Is it possible to have dynamic cursor definition in PL/SQL. Like
using DBMS_SQL for dynamic SQL. If yes, how?

Assuming I understand your question correctly, you can use a REF
CURSOR to which you associate a VARCHAR2 which is the query text:
DECLARE
TYPE t_cur IS REF CURSOR ; -- define t_cur as a type
c_cur t_cur ; -- define an actual variable of type t_cur
r_emp emp%ROWTYPE ; -- PL/SQL record to hold row
v_query VARCHAR2(2000) := 'SELECT * FROM emp' ; -- the query!
BEGIN
OPEN c_cur FOR v_query ; -- v_query could contain any valid query
FETCH c_cur INTO r_emp ; -- get first row from dataset
CLOSE c_cur ; -- remember to close the cursor! ;)
END ;
HTH

Does Declare Dynamic Cursor Support with Order Clause?

Given a dynamic cursor like
     declare CUR_10 dynamic cursor for SQLSA;
     prepare SQLSA from :ls_SQL;
     open dynamic CUR_10;
     do while TRUE
          fetch CUR_10 into :ls_var1, :ls_var2
     loop
where ls_SQL is "select COL1, COL2 from TABLE_A order by COL2 desc"
can I fetch values in the exact DESCENDING order of COL2?

Hello Ronald,
Values will be fetched in the way you SQL statement has been defined for your dynamic cursor, so in the descending order.
I've tested your code with an Oracle connection and it works perfectly.
Just ensure to add a condition to your DO WHILE statement when the resultset is exhausted:
DO WHILE TRUE AND SQLCA.SQLCode <> 100
Kind regards,
Jacob

Report with Dynamic Cursor

hi forum
I need your help and I hope you can help me. In my job I need to do a Report, but the function that containts the cursor returns a ref cursor and this ref cursor doesn't return a special format 'cause the cursor that I use is Dynamic so when I try to do the report it is not generated.
the documentation says that should return something for example
type vref_cursor is ref cursor[b] return record;
or
type vref_cursor is ref cursor return depto%rowtype;
but if I use this in a dynamic cursor it generates an Error and don't accpet this declaration only the following
type vref_cursor is ref cursor;
Do you Know how should I do the report with a dynamic cursor ?
best regards
thank's a lot

That is not possible. From the online help:
Each ref cursor query is associated with a PL/SQL function that returns a strongly typed ref cursor.

Fetching values of Dynamic Cursor

Hi,
Can I fetch values of dynamic cursor into a variable(record OR individual)? If yes what will be the type of that record/variable?
Thanks in Advance!
Regards
RK

bluefrog wrote:
There is no way in 10g to identify the column data types of the result set of a dynamic ref cursor.
In 11g one can use ;
DBMS_SQL.DESCRIBE_COLUMNS (
c IN INTEGER,
col_cnt OUT INTEGER,
desc_t OUT DESC_TAB);when using DBMS_SQL
P;In 11g you can use a ref cursor and then use the DBMS_SQL package to convert that ref cursor to a DBMS_SQL cursor where you can then describe the columns. The initial query doesn't have to be a DBMS_SQL cursor. In 10g, unfortunately, there is no way to convert the ref cursor to a DBMS_SQL cursor, so dynamic cursors would have to be written as DBMS_SQL cursors initially. Ref cursors are only really suitable for 3rd party tools, such as when passing queries back to .NET or Java applications. Too many people try and use ref cursors inside PL/SQL and then discover why that's not a good idea.
PL/SQL 101 : Understanding Ref Cursors:-
PL/SQL 101 : Understanding Ref Cursors

Can I create a dynamic cursor in a program unit on oracle form....

Hello folks,
can I create a dynamic cursor on client side ( in a program unit on the oracle form), is it possible, I Know how to create it on server side using Ref cursor, but on client side i got this message (can't be created on client side or something like that).... please if someone can help

> select count(*) from t_comsis
<p>But when you put that select string into a varchar2 variable, it won't compile. Which makes it hard to create anything "dynamic".
<p>In Forms, you can create and populate a record group dynamically, which is ok as long as your select will not retrieve too many (more than several hundred) rows.
<p>Or, your other option is to use the Forms Exec_SQL dynamic sql package.

Dynamic cursors

Hi,
I'm trying to work on dynamic cursors.
When I try to execute the below code, I'm getting the following error.
BEGIN
DYNAMIC_CURSOR.OPENCURSOR();
END;
exception raised ORA-00932: inconsistent datatypes: expected - got -
Below is my code:
CREATE OR REPLACE
PACKAGE BODY dynamic_cursor AS
    PROCEDURE dyn_sel (
        tab_name   IN VARCHAR2,
        field_name IN VARCHAR2,
        val        IN VARCHAR2,
        crs        IN OUT t_crs)
    IS
        stmt VARCHAR2(200);
    BEGIN
        stmt := 'select * from '|| tab_name || ' where '|| field_name || ' = :1';
        OPEN crs FOR stmt USING val;
    END dyn_sel;
    PROCEDURE openCursor IS
        tc t_crs;
        f1 VARCHAR2(50);
        f2 VARCHAR2(50);
    BEGIN
        dyn_sel ('EMP','JOB','MANAGER', tc);
        LOOP
            FETCH tc INTO f1, f2;
            EXIT WHEN tc%notfound;
            dbms_output.put_line (f2);
        END LOOP;
    EXCEPTION
        WHEN OTHERS THEN
            dbms_output.put_line ('exception raised '||SQLERRM);
    END openCursor;
END dynamic_cursor; -Thanks

The selected columns must match the INTO clause, so you need to exactly fetch two columns as e.g. in
stmt := 'select ename, job from ' || tab_name || ' where ' || field_name || ' = :1';
....

Using a Dynamic cursor

Hi,
I have a problem with this code :
DECLARE
     v_Column_Name           all_tab_columns.column_name%TYPE;      -- variable for TABLE_SQL
     v_data_type           all_tab_columns.data_type%TYPE;      -- variable for CHPS_SQL
     v_Table_Name           user_tables.table_name%type;
     lc$results     VARCHAR2(32767) := null;
     lc$Champ     VARCHAR2(32767) := null;
     lc$Requete     VARCHAR2(32767) := null;
     CURSOR C1 IS
          SELECT table_name FROM user_tables;
BEGIN
     OPEN C1;
     LOOP
          FETCH C1 INTO V_Table_name;
          EXIT WHEN C1%NOTFOUND;
          DECLARE
               CURSOR C2 IS
                    select column_name, data_type from all_tab_columns where table_name = V_TABLE_NAME;
          BEGIN
               lc$results := 'INSERT INTO ' || v_table_name || '(';
               lc$requete := 'SELECT ' ;
               lc$Champ := NULL;
               OPEN C2;
               LOOP
                    FETCH C2 INTO V_column_name, V_data_type;
                    EXIT WHEN C2%NOTFOUND;
                    if lc$Champ IS NOT NULL then
                         lc$Champ := lc$champ || ',' || v_column_name;
                         lc$requete := lc$requete || ',' || '''''''''' || ',' || v_column_name || ',' || '''''''''';
                    else
                         lc$champ := lc$champ || v_column_name;
                         lc$requete := lc$requete || '''''''''' || ',' || v_column_name || ',' || '''''''''';
                    end if;
               END LOOP;
               CLOSE C2;
               lc$results := lc$results || lc$champ || ') VALUES (';
               lc$requete := lc$requete || ' FROM ' || v_table_name;
-- MY PROBLEM BEGIN HERE
               DECLARE
*                    TYPE EmpCurTyp IS REF CURSOR;*
*                    C3     EmpCurTyp;*
*               BEGIN*
*                    OPEN C3 FOR lc$requete;*
*                    lc$champ := NULL;*
*                    LOOP*
*                         FETCH C3 INTO lc$champ ;*
*                         Exit when C3%NOTFOUND ;*
*                         lc$champ := lc$results || lc$champ || ')';*
*                         dbms_output.put_line(lc$champ);*
*                    END LOOP;*
*                    CLOSE C3;*
*               END;*
          END;
     END LOOP;
     CLOSE C1;
END;
the error code is : ORA-00932: inconsistent datatypes: expected - got -
Need help please,
Thank

904907 wrote:
How can I use the dbms_SQL for this code?99% of the time this indicates design issues. You are trying to write "one-size-fits-all" code which by definition will have substantial overhead. Other than that, in general, you need to declare a variable for each data type possibly returned by dynamic SQL. Then use DBMS_SQL.DESCRIBE_COLUMNS to get data types of select list expressions. Fetch a row and then loop from 1 to number of select list expressions where loop body is one giant IF to test select list expression datatype and issue corresponding DBMS_SQL.COLUMN_VALUE into proper data type variable.
SY.

Dynamic Cursor Fields Reference

Hi,
We have a requirement, whereby we need to refer the fields dynamically from the
cursor, which we cannot decide during development time. It will be keep changing
and need to be decided during run time only.
In the below example, I have used "name_in" function to do this, it is not allowed
in PL/SQL and supported only in Oracle*Forms.
Please suggest what is the best method available for this requirement, can I
declare a variable using "ROWTYPE" and use that by any method, thank you.
DECLARE
v_Primary_Key int;
v_Result1 number(10);
v_Result2 number(10);
v_Result3 number(10);
v_Result4 number(10);
v_cntr int;
CURSOR CR_TMP
IS
     SELECT PKFLD, F1, F2, F3, F4, F5, F6 FROM TMP1;
BEGIN
     FOR CF_TMP IN CR_TMP LOOP
          v_Primary_Key := CF_TMP.PKFLD;
          v_Result1 := CF_TMP.F1 + CF_TMP.F2;
          v_Result2 := CF_TMP.F2 + CF_TMP.F3;
          v_Result3 := CF_TMP.F2 + CF_TMP.F3 + CF_TMP.F4;
          FOR v_cntr in 1..5
          LOOP
          v_Result4 := v_Result4 + to_number(name_in('CF_TMP.F' ||
v_cntr));
          END LOOP;
     INSERT INTO TMP2
     Values(v_Primary_Key, v_Result1, v_Result2, v_Result3, v_Result4);
     END LOOP;
COMMIT;
END;
Regards,
Deva

The following example from my book on Oracle Database 11g PL/SQL Programming should help you because it'll work in at least 10g and perhaps 9i:
DECLARE
-- Define explicit record structure.
TYPE title_record IS RECORD
( item_title VARCHAR2(60)
, item_subtitle VARCHAR2(60));
-- Define dynamic variables.
title_cursor SYS_REFCURSOR;
title_row TITLE_RECORD;
stmt VARCHAR2(2000);
BEGIN
-- Set statement.
stmt := 'SELECT item_title, item_subtitle '
|| 'FROM item '
|| 'WHERE SUBSTR(item_title,1,12) = :input';
-- Open and read dynamic curosr, then close it.
OPEN title_cursor FOR stmt USING 'Harry Potter';
LOOP
FETCH title_cursor INTO title_row;
EXIT WHEN title_cursor%NOTFOUND;
dbms_output.put_line(
'['||title_row.item_title||']['||title_row.item_subtitle||']');
END LOOP;
CLOSE title_cursor;
END;
Hope it helps, Michael

JDBC Adapter Receiver dynamic connection string

Hi,
I'm developing an IDOC-JDBC scenario and I need to send data to one of the different databases depending of one field in the IDOC. All databases are identical, the only difference is the server where they are. We are using SAP PI 7.0. If you need more information, please report.
Best Regards,
Alfredo Lagunar.

Hi Alfredo,
no bother to think about dynamic varialble substitution or something like that, which might be possible, might be not. In this case, you just configure several receiver channels and serveral receiver business services. By using the conditioning(XPATH) winthin receiver determination you can route your XML message to the JDBC database with different IP addresses.
Actually SAP is using the same solution in one of its standard implementation: ELSTER (Electronic Tax Claim, in german Elektronische Steuererklärung). The only difference is the receivers are HTTP endpoint, not JDBC. But the idea is the identical: they are all having different IPs, like your databases.
Hope it inspires.
Regards,
Chen

Proxy to JDBC scenario need dynamic sql query for sender .

Hi Experts,
I am developing proxy to jdbc scenario. in this i need to pass dynamic sql query whre we are passing classical method like below.
while we are passing select stmt in constant and mapped with access field and key field mapped with key field.
MY requirement is like instead of passing select stmt in constant where i can generate dynamically and passed in one field and mapped with access field.

Hi Ravinder,
A simple UDF or use of graphical mapping functions in most cases should provide you everything you need to construct a dynamic SQL statement for your requirement.
Regards,
Ryan Crosby

Semi-dynamic cursor on heterogeneous tables

I have a list of Microsoft Access databases. They are yearly transaction databases. The tables in each look exactly alike.
What I need to do is loop through the "list of databases" (which I retrieve from a secondary source), and loop through table T1 in each of these databases. I could use the completely-dynamic code at AskTom, but I'm guessing that's going to have horrible performance. In my case,I know what the columns are. The only thing that's changing is the link to the database itself. So here's what I want to do:
Declare a generic cursor C1 (but without linking to any particular database's rowtype).
Loop through all database link names:
set C1 = 'select * from T1@' || linked_db_name;
for rec_c1 in C1 loop
dbms_output.put_line(rec_c1.field1);
dbms_output.put_line(rec_c1.field2);
end loop;
end loop;
Is there a way to do this, where I can refer to each field by name? Or must I use the describe and/or have a non-generic cursor as the basis for the cursor definition? My backup option is to drop and recreate the database link each time, with a "reference" DB link created at the outset by the customer. But I don't know if I can do that in PL/SQL (drop and recreate database links).
Thanks for your assistance!
Christine Wolak
SPL Worldgroup, Inc

Christine:
I've never actually tried this across a db_link to Access, but it should work.
DECLARE
   l_sql VARCHAR2(4000);
   l_cur SYS_REFCURSOR;
   TYPE access_rec IS RECORD (col1 VARCHAR2(35),
                              col2 VARCHAR2(35));
   -- Whatever the appropriate Oracle data type is for the Access field
   -- To do just singleton selects
   l_ar access_rec;
   -- To do bulk collect
   TYPE access_tbl IS TABLE of access_rec INDEX BY BINARY_INTEGER;
   l_at access_tbl;
BEGIN
   FOR dbs in (SELECT link_name FROM db_table) LOOP
      l_sql := 'SELECT * FROM t1@'||dbs.link_name;
      OPEN l_cur FOR l_sql
-- For singleton selects
      LOOP
         FETCH l_cur INTO l_ar
         EXIT WHEN l_cur%NOTFOUND;
         << Do whatever here using l_ar.col1, l_ar.col2>>
      END LOOP;
-- For bulk collects
      LOOP
         FETCH l_cur BULK COLLECT INTO l_at LIMIT 100
         -- Limit not strictly neccessary, but if ther are a large
         -- number of rows it might be wise.
         FOR i IN 1 .. l_at.COUNT LOOP
            << Do whatever here using l_at(i).col1, l_at(i).col2>>
         END LOOP;
         EXIT WHEN l_cur%NOTFOUND;
         -- Note that the last fetch may retrieve less than LIMIT rows.
         -- it will set NOTFOUND true, so you need to test at the end
         -- of the loop
      END LOOP;
      CLOSE l_cur;
   END LOOP;
END;HTH
John

Error in dynamic cursor::

hi experts
please help me for this error
In this code the cursor conditions are not appending to the query
so when i am executing the result it is displaying the error
can you help me on this
SQL> CREATE OR REPLACE PROCEDURE test_dynamic_detailed_rpt (
2     v_typ             IN       VARCHAR2,
3     v_initiator   IN       VARCHAR2,
4     p_rc                  OUT      sys_refcursor
5 )
6 IS
7     v_sql   VARCHAR2(32767);
8 BEGIN
9     v_sql := 'SELECT COUNT(*) FROM txnlg tl WHERE ';
10
11      v_sql := v_sql||'tl.typ = ''1''';
12
13
14           FOR j IN (SELECT tc.tgid, tc.tranid, tc.reqtype
15                       FROM txnccde tc
16                      WHERE tc.actstatus = 'Y'
17                        AND tc.txndesc = v_typ)
18           LOOP
19              IF LENGTH (j.tgid) < 4
20              THEN
21                 v_sql := v_sql || ' OR ''UP''||J.tgid';
22                 --'''|| v_typ|| ''')';
23              ELSE
24                 v_sql := v_sql || ' OR   J.tgid';
25              END IF;
26           END LOOP;
27
28     DBMS_OUTPUT.PUT_LINE(v_sql);
29 END;
30 /
Procedure created.
SQL>
SQL> set serveroutput on;
SQL>
SQL> Var p_rc refcursor;
SQL>
SQL> BEGIN
2 test_dynamic_detailed_rpt('ALL','C',:p_rc);
3 END;
4 /
SELECT COUNT(*) FROM txnlg tl WHERE tl.typ = '1'
PL/SQL procedure successfully completed.
SQL>
SQL> print p_rc;
ERROR:
ORA-24338: statement handle not executed
SP2-0625: Error printing variable "p_rc"
SQL>

980560 wrote:
I have coded that cursor . but the following error is occuring while
executing the cursor .please help me to resolve this .
CREATE OR REPLACE PROCEDURE test_dynamic_detailed_rpt (
v_typ IN VARCHAR2,
v_initiator IN VARCHAR2,
p_rc OUT sys_refcursor
IS
v_sql VARCHAR2 (32767);
BEGIN
v_sql := 'SELECT COUNT(*) FROM txnlg tl WHERE ';
v_sql := v_sql || 'tl.typ = ''1''';
FOR j IN (SELECT tc.tgid, tc.tranid, tc.reqtype
FROM txnccde tc
WHERE tc.actstatus = 'Y')
LOOP
IF LENGTH (j.tagid) < 4
THEN
v_sql :=
v_sql || ' OR ' || 'tl.txntype =' ||''''|| 'AP' ||j.tgid
|| '''';
ELSE
v_sql := v_sql || 'OR ' || 'tl.txntype =' ||''''||j.tgid||'''';
END IF;
END LOOP;
DBMS_OUTPUT.put_line (v_sql);
OPEN p_rc FOR v_sql;
END;
Procedure created.
SQL>
SQL> set serveroutput on;
SQL>
SQL> Var p_rc refcursor;
SQL>
SQL> BEGIN
2 test_dynamic_detailed_rpt('ALL','C',:p_rc);
3 END;
4 /
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at P_DETAILED_REPRT, line 226
ORA-06512: at line 2
That error does not relate to the code you've posted. P_DETAILED_REPORT is not the name of your procedure.
Please post the error you get from running the code shown. I suspect you are trying to build an SQL statement that is too large for the v_sql variable, but we don't have your data to be able to tell.
I'll repeat what I said earlier:
Perhaps if you posted some examples of your tables and data, and explained what output you are trying to get, we could help you to write it as a static SQL instead.Read this: {message:id=9360002}
You'll find that the people who get the quickest answers around here are the ones who ask their questions properly with sufficient information and example data. If you keep people guessing what you want, then they often tend to get bored and go elsewhere.... so the choice is yours... help us to help you.

HOW TO CREATE A DYNAMIC CURSOR?

hi, i have a cursor that i declared it in first_line of my package.
create or replace package ....
CURSOR ACCESS_VIEW IS SELECT * FROM SYS.ALL_OBJECTS;
PROCEDURE PUT...
FOR REC IN ACCESS_VIEW
LOOP
END LOOP;
in this package and at the first line of 'put' procedure, i will change the ACCES_VIEW CURSOR. how can i do this? pls help me.
thanx

in this package and at the first line of 'put' procedure, i will change the ACCES_VIEW CURSOR. how can i do this?
SQL> create or replace package pkg
as
   cursor cur is select * from emp;
   procedure put;
end pkg;
Package created.
SQL> create or replace package body pkg
as
   procedure put
   as
   begin
     for c in cur
     loop
        dbms_output.put_line(c.ename);
     end loop;
   end put;
end pkg;
Package body created.
SQL> exec pkg.put
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
KING
TURNER
ADAMS
JAMES
FORD
MILLER
PL/SQL procedure successfully completed.
@Sundar M:
SQL> create or replace package pkg
as
   cur   sys_refcursor;
end pkg;
Warning: compiled but with compilation errors
SQL> show error
Errors for PACKAGE PKG
LINE/COL
ERROR
3/10
PLS-00994: Cursor Variables cannot be declared as part of a package
3/10
PL/SQL: Declaration ignored

JDBC 2.0 - Dynamic cursors

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