SQL & PL/SQL :: Update Cursor - Fetch Out Of Sequence
Sep 17, 2013
I'm currently facing a non-critical situacion while trying to update a table. Here's the PL/SQL Code. It's a pretty straight-forward script, It just update one single column of the table. The only problem is that I have to update over 15 milions records. When I use the for update cursor, I put inside the loop a counter, when it reaches 1000 records, then commit, else keep counting.
The block throws the exception ORA-01002: fetch out of sequence.
I've tried to do some reserch on Google, buy it only says it is an out of secuence fetch caused by a commit inside a for update cursor.
My question is. Is there any risk by putting the commit under the end loop, I mean by doing this I'd be updating over 15.000.000 records at the same time. Will I have any issue with the rollback segment ?
Here's the code as along with the Create Table and Insert statements.
CREATE TABLE TEST_1
(
TEST_ID NUMBER PRIMARY KEY,
IS_LOCKED NUMBER NOT NULL
);
INSERT INTO TEST_1
(TEST_ID, IS_LOCKED)
VALUES
(1, 0);
I am back with one more issue. I am fetching records through a cursor from database using Pro*C and inserting some records as shown below:
EXEC SQL DECLARE cur_num CURSOR FOR SELECT STUDENT_NUMBER FROM STUDENTS WHERE STDID = :temp_num ORDER BY STUDENT_NUMBER; EXEC SQL OPEN cur_num; EXEC SQL WHENEVER NOT FOUND DO break;
[code]....
This code works fine sometimes but ends up with this error sometimes: ORA-01002: fetch out of sequence and also do I need to do null termination once i fetch data from the database like this:
Quote:EXEC SQL FETCH cur_num INTO :std_num ; std_num.arr[std_num.len] = '�'; std_num is declared as varchar datatype.
we have an application currntly running on an HP UX system that uses Oracle 9i database. the pro*C codes work fine with Oracle 9i, on the older system. however now we are migrating it to LINUX system (ORACLE 10g). in the new system we are facing issues with fetch statement
here is how we have the
the cursor statement:
EXEC SQL DECLARE diff_cns_list CURSOR FOR select PREV.CNS_CODE, PREV.CNS_DESCRIPTION,
[code]....
the code runs fine in the old operating system (HP UX) where oracle 9i was used. but fails in Oracle 10g(OS-LINUX).
the probable reason that we found out is that: the fetch statement returns zero rows, that is the reason why this error is being displayed. but Oracle 9i seemed to work out well with this.
we tried reducing the cursor conditions, where it fetches 3 rows. this is when is the fetch statement works fine.
the functionality of the code is that it should work fine even with no rows selected. Is there a way we can modfy the code to work with zero rows as well.
the error we are getting is : ORA-01002: fetch out of sequence ========================== as per what is given in Oracle sites:
1) Fetching from a cursor after the last row has been retrieved and the ORA-1403 error returned. 2) If the cursor has been opened with the FOR UPDATE clause, fetching after a COMMIT has been issued will return the error. 3) Rebinding any placeholders in the SQL statement, then issuing a fetch before reexecuting the statement.
======================== we have checked:
1>this is not the case and ORA-1403 not returned
2>No update statements involved , there is a insert statement which inserts data in this table
I want to fetch the data through the cursor and cursor is getting the value of group_code through the variable 'a'. but when i am writing the code like this it is not coming.
My code is like this :
declare a varchar2(400):=''; cursor c1 is select ref_no,ref_code,company_id from stock_detail where company_id=:global.company_id
CREATE OR REPLACE PROCEDURE COMP_RECORDS IS l_query VARCHAR2 (10000) := '';
CURSOR TBL1 IS SELECT TABLE_NAME, COLUMN_NAME FROM COLS_TO_COMP WHERE TABLE_NAME='ACE_HIST'; TBL1_REC APP.COLS_TO_COMP%rowtype;
[Code]..
However I am getting an ORA-00923 exception with message as "FROM keyword not found where expected". know if I can/cannot use a cursor to fetch column names for a table?
I need to open an explicit cursor for making a total: after I have to use the same information of that explicit cursor for dividing a column of the cursor by that total. It is not enough to open close, reopen and reclose because I just obtain one register at the same time and it is the same register two times consecutively.
I don't want to use auxiliary structures cause there are 18000 columns for 10200 rows.
FOR i IN 300..300 --18000 LOOP y:=ymax-ysize*(i+0.5);
i HAVE THE FOLLOWING CODE WRITTEN IN A *.pc FILE. I am trying to loop to fetch data from cursor. But the code exist after it fetches the first record. Let me know what is it the right way to fetch data from cursor?
EXEC SQL BEGIN DECLARE SECTION;
char str[64];
EXEC SQL END DECLARE SECTION;
/*cursor declarations*/ EXEC SQL DECLARE Get_SQLText_Cursor CURSOR FOR
, im having this trouble to update some records, the problem is i have I have this table with some transactions and each row have a cd_cli (client code), dt_ven (date of the transaction) and a product id (cd_prod) the trouble is, i insert a row for each product in this table, then i have like this
110001YURI AGUIRREWALLMA400V44-B469,0019/9/2013210001YURI AGUIRRESU-7N-B78,0019/9/2013310001YURI AGUIRREWALLSF35V22-S78,5719/9/2013410003WILLIANWALLSA470V22-BS449,002/9/2013 but i need to update the CD_TRANS for each row with the same number like all the YURI AGUIRRE recode must have like CD_TRANS 1, and the WILLIANs CD_TRANS must be 2 and the next must be cd_trans 3, but I've tried to update the table for a lot of ways but i don't have success trying to do this, the last thing i had tried was
MERGE INTO TVEN_TEMP a USING (SELECT CD_CLI, DENSE_RANK () OVER (ORDER BY DT_VEN) new_seq_num FROM TVEN_TEMP WHERE CD_TRANS IS NULL) b ON (a.CD_CLI = b.CD_CLI)
In the ideal world each subcategory of a single category would have unique sequence so if there are 3 subcategory for the same category then each of them would have 1,2,3 in sequence, if there are 5 subcategories then 1,2,3,4,5 for each of them etc.
Problem I'm facing is that some of the subcategories sequences for the same category has the same values . For instance for 4 subcategories of the same category, each of them has 1 (1,1,1,1) in a sequence.
So ideal world is :
Insert into Category values (123 ,'Category1'); Insert into Category values (234 ,'Category2'); Insert into Category values (345 ,'Category3'); Insert into Category values (456 ,'Category4'); Insert into Category values (567 ,'Category5'); Insert into Sub_Category values (1,123,1); Insert into Sub_Category values (2,123,2); Insert into Sub_Category values (3,123,3);
But I've also bad rows like this:
Insert into Sub_Category values (4,234,1); Insert into Sub_Category values (5,234,1); Insert into Sub_Category values (6,234,1); Insert into Sub_Category values (7,345,1); Insert into Sub_Category values (8,345,1); [code].....
Fix for this and my goal is to select all such cases where subcases have mixed up sequences as above and give them randomly numbers starting from 1. So if there are 3 subcategories like for CATEGORY 2 then just apply random number to the sequence of the subCATEGORIES like 1,2,3. For CATEGORY 3 : 1,2,3 to 7.
I was thinking to write two procedures one selecting all the categories and passing category ID to the other procedure that would actually update sequence, like this:
CREATE OR REPLACE PROCEDURE SCHEMA.SELECT_CATEGORY IS CURSOR c1 IS select category_ID from category where ...; BEGIN FOR a IN c1 LOOP UPDATE_SUBCATEGORY(a.Category_id); COMMIT; END LOOP; END; /
And the actual procedure updating subcategory:
CREATE OR REPLACE PROCEDURE SCHEMA.UPDATE_SUBCATEGORY BEGIN ............ END; /
write PROCEDURE SCHEMA.SELECT_CATEGORY cursor to not miss any of the categories ID having mixed up subcategory. There can be any of the doubled sequences like doubled 1 value (this is majority) but there can be any other doubles (or at least I need to make sure that there aren't any other doubles 2 values or 3 values in sequence etc.)
And how to write SCHEMA.UPDATE_SUBCATEGORY to loop through rows of subcategory and update sequence with values starting from 1 ?
My table have duplicate records. I want to impose a primary key on that table. For that I have to replace duplicate values of a column with next value of a sequence.
I have come across a code where i need to know exact logic for the use of FOR UPDATE and COMMIT used in a cursor.The code is like :
Declare Cursor c1 is select * from emp FOR UPDATE; Z c1%rowtype; Begin Open C1; Fetch c1 into Z; dbms_output.put_line(z.ename); Commit; Fetch c1 into Z; dbms_output.put_line(z.ename); end;
When i run above code, i get error as below, but first value from table emp i.e. emp.ename is displayed :
Error at line 1 ORA-01002: fetch out of sequence ORA-06512: at line 9
But when i run by removing FOR UPDATE, i get first 2 values displayed without any error message:
Declare Cursor c1 is select * from emp; Z c1%rowtype; Begin Open C1; Fetch c1 into Z; dbms_output.put_line(z.ename); Commit; Fetch c1 into Z; dbms_output.put_line(z.ename); end;
I need to write a script which copies 4 col data from one table to another table. there are three tables
cwat_curr_mst and cwat_assigned_customer and cwat_assignment_mst. Cwat curr mst has PK curr_id and cwat_assigned_customer has PK assignment_id. Also cwat_assigned_customer has customer_id. In cwat_assignment_mst has Curr_id and Assignment_ID.
cwat_curr_mst and cwat_assigned_customer tables has 4 cols in common they are ASRT_SNM_NO, SNM_NO, FLORIDA_NO, CBRN_NO.
So from curr_mst all these 4 cols data needs to come/copy into cwat_assigned_customer.
for Inserting records created below cursor, records are inserted and I can see on my screen (form) also.
DECLARE CURSOR InvestIS select * from Tempinvest; BEGIN OPEN Invest; GO_BLOCK('ReturnReport'); last_record; [code]......
2nd step:-
Updating records I wan to update some columns in this table so I created a 2nd cursor to update records but this cursor is not working accordingly. my requirement is: before Update first of all Find inv_co_code & inv_fnd_code when find then update column Redunits
2nd Cursor
DECLARE ddate date; refdate date; co_code number; co_name varchar2(50); fnd_code number; fnd_name varchar2(50); units number; amount number; stat varchar2(1); CURSOR bnr IS
select Ddate,refdate,co_code,co_name,fnd_code,fnd_name,units,amount,stat from ( select inv_date DDate,Vdate RefDate,inv_co_code Co_code,inv_co_name Co_name,inv_fnd_code Fnd_code,inv_fnd_name Fnd_name, inv_nofu Units,inv_amount Amount,Status Stat from ( ------------- Bonus ------------------- select inv_date,vdate,inv_co_code,inv_co_name,inv_fnd_code,inv_fnd_name,inv_nofu,Inv_amount,inv_uprice,'B' Status from investment where code is null and inv_date <= :dd1 ---------------- Redemption -------------- Union All select red_date,null,red_co_code,red_co_name,red_fnd_code,red_fnd_name,red_nofu,red_amount,red_uprice,'R' Status from redemption where red_date <= :dd1 )) where co_code = 13 and fnd_code = 1 order by co_code,fnd_code,ddate ; ------------------------------------------ vddateddate%type; vrefdate refdate%type; vco_codeco_code%type; vco_nameco_name%type; [code].......
I would like to update the particular employee name by using the cursor ..For that I would like to show the steps which I did . as in the below screen it updated John but it removed the other ename ...I like to update John only and remaining ename should be as it ..
The code which I have written on KEY-COMMIT is below.
I'm using dynamic sql (DBMS_SQL) to define columns of ref cursor. It works Ok but the problem is when i'm using PL/SQL CURSOR in the REF CURSOR. Then,I'm getting :
Error at line 3 ORA-00932: inconsistent datatypes: expected NUMBER got CURSER ORA-06512: at "SYS.DBMS_SQL", line 1830 ORA-06512: at "TW.PRINT_REF_CURSOR", line 28 ORA-06512: at line 9
Here is my code: set serveroutput on exec DBMS_OUTPUT.ENABLE(1000000); declare l_cursor sys_refcursor; begin [code]....
i have two tables test1 and test2. i want to update the column(DEPT_DSCR) of both the tables TEST1 and TEST2 using select for update and current of...using cursor.
I have a code written as follows :
DECLARE v_mydept1 TEST1.DEPT_CD%TYPE; v_mydept2 TEST2.DEPT_CD%TYPE; CURSOR C1 IS SELECT TEST1.DEPT_CD,TEST2.DEPT_CD FROM TEST1,TEST2 WHERE TEST1.DEPT_CD = TEST2.DEPT_CD AND TEST1.DEPT_CD = 'AA' FOR UPDATE OF TEST1.DEPT_DSCR,TEST2.DEPT_DSCR; [code].......
The above code when run says that it runs successfully. But it does not updates the desired columns[DEPT_DSCR].
It only works when we want to update single or multiple columns of same table...i.e. by providing these columns after "FOR UPDATE OF" I am not sure what is the exact problem when we want to update multiple columns of different tables.
FRM-40501: ORACLE error: unable to reserve record for update or delete.
ORA-24374: define not done before fetch or execute and fetch
My master-detail form has single canvas. For both blocks, master and detail, two tables joined together in each. One table to be updated, second table has some info for reference (query only).
I am getting these errors when in detail block the item from LOV is selected for existing record. This does not happen for new record inserted in detail block.
I am having a table with 4 columns as mentioned below
For a particular prod the value greater less than 5 should be rounded to 5 and value greater than 5 should be rounded to 10. And the rounded quantity should be adjusted with in a product starting with order by of rank with in a prod else leave it
I have taken all the records in to a cursor. Once after rounding the request of 1st rank and adjusting the values of next rank is done. Trying to round the value for 2nd rank as done for 1st rank. Its not taking the recently updated value(i,e adjusted value in rounding of 1st rank).
This is because of using a cursor having a value which is of old value. Is there any way to handle such scenario's where cursor records gets dynamically updated when a table record is updated.
I'm dealing with an ORA-1000 error in a Pro*C application where all the cursors are correctly closed (or so it seems to me).
Here is the code for a simple program which reproduces the problem:
Each cursor is opened in a PL/SQL package:
CREATE OR REPLACE PACKAGE emp_demo_pkg AS TYPE emp_cur_type IS REF CURSOR; PROCEDURE open_cur(curs IN OUT emp_cur_type, dept_num IN NUMBER); END emp_demo_pkg;
[Code]....
While testing the initialization parameter open_cursors is set to 50.
It's my understanding that Oracle doesn't close the cursors until it needs the space for another cursor, which in my test case seems to happen when I enter a value of 50 or bigger for "number of loops". To see how oracle is reusing the cursors, while the test program is running I run SQL*Plus and query v$sesstat for the session that's running the test with the following sentence:
select name, value from v$sesstat s, v$statname n where s.statistic# = n.statistic# and sid = 7 and name like '%cursor%';
Even before I enter a value for number of loops I can see that the session opened 4 cursors and closed 2 of them:
NAME VALUE ---------------------------------------------------------------- ---------- opened cursors cumulative 4 opened cursors current 2
Entering a value of 5 for number of loops yields
NAME VALUE ---------------------------------------------------------------- ---------- opened cursors cumulative 11 <----- 7+ opened cursors current 8 <----- 6+
With a value of 30
NAME VALUE ---------------------------------------------------------------- ---------- opened cursors cumulative 36 <----- 25+ (apparently, Oracle reused at least 5 cursors) opened cursors current 33 <----- 25+
With a value of 47
NAME VALUE ---------------------------------------------------------------- ---------- opened cursors cumulative 53 <----- 17+ opened cursors current 50 <----- 17+
Now I reached the upper limit set by the initialization parameter open_cursors.
Entering a value of 48, I get the ORA-1000 error.
ORA-01000: maximum open cursors exceeded ORA-06512: at "SCOTT.EMP_DEMO
Since I open and close the cursor in the same loop iteration, I expect to find in every iterarion 1 explicit cursor and a number of implicit cursors (the PL/SQL call along with the so-called recursive cursors), but I don't expect the sum of all of them to be greater than 50. If my understanding is correct Oracle should be reusing the 50 cursors previously marked as "closeable", not raising the ORA-1000 error.
-define a cursor with bind variables -get a cursor record from these cursor -and pass the bind variable in the OPEN clause
Did'nt succeed as shown in the example.
SET SERVEROUTPUT ON SIZE 900000; DECLARE --works fine CURSOR c1 IS SELECT * FROM USER_TABLES WHERE rownum<3; --doesn't work --CURSOR c1 IS SELECT * FROM USER_TABLES WHERE rownum<:1; crec c1%rowtype; BEGIN --works fine OPEN c1; --isn't possible ? --OPEN c1 USING 3;
