Oracle updating cursor loop svn resource out of date try updating

Although your code looks as if it fetched one row at a time, Oracle Database fetches multiple rows at a time and allows you to process each row individually.DECLARE 2 CURSOR my Cursor IS 3 SELECT * FROM sec_product FOR UPDATE OF product_description; 4 v_product_description VARCHAR2(20); 5 BEGIN 6 FOR idx IN my Cursor LOOP 7 v_product_description :=UPPER(idx.product_description); 8 UPDATE sec_product 9 SET product_description =v_product_description 10 WHERE CURRENT OF my Cursor; 11 END LOOP; 12 COMMIT; 13 END; 14 / PL/SQL procedure successfully completed.

NET; END LOOP; FORALL i IN new_data_tab.first..new_data_SAVE EXCEPTIONS # ORA-00913: To many values UPDATE TARGET_TABLE -- SET row = update_cols_tab(i) SET row = update_cols_tab1(i) -- row = update_cols_tab2(i) WHERE ROWID = row_id_tab(i); COMMIT; EXIT WHEN new_data_tab.count=0; END LOOP; COMMIT; CLOSE new_data_cur; EXCEPTION WHEN dml_errors THEN FOR i IN 1..

NET; END LOOP; DECLARE -- new data CURSOR new_data_cur IS select a.rowid, a.

VAT from TARGET_TABLE a join TARGET_TABLE_COPY b on ( a. TICKET_ID AND a.product_id =b.product_id ) ; TYPE new_data_type IS TABLE OF new_data_cur%rowtype INDEX BY PLS_INTEGER; new_data_tab new_data_type; TYPE row_id_type IS TABLE OF ROWID INDEX BY PLS_INTEGER; row_id_tab row_id_type; TYPE rt_update_cols IS RECORD ( NET TARGET_TABLE. VAT%TYPE ); TYPE update_cols_type IS TABLE OF rt_update_cols INDEX BY PLS_INTEGER; update_cols_tab1 update_cols_type; --update_cols_tab2 update_cols_type; dml_errors EXCEPTION; PRAGMA exception_init ( dml_errors,-24381 ); BEGIN OPEN new_data_cur; LOOP FETCH new_data_cur BULK COLLECT INTO new_data_tab LIMIT 50000; EXIT WHEN new_data_tab.count=0; FOR i IN new_data_tab.first..new_data_LOOP row_id_tab(i) := new_data_tab(i).rowid; update_cols_tab1(i).

SQL%bulk_exceptions.count LOOP dbms_output.put_line('Some error occured'); END LOOP; END; FOR i IN new_data_tab.first..new_data_LOOP row_id_tab(i) := new_data_tab(i).rowid; update_cols_tab1(i).

Even when the query itself is automatically optimized to return 100 rows with each fetch, the INSERT or UPDATE will happen on a row-by-row basis.

This is one of the worst performance “anti-patterns” in database programming.The declaration of the statements, should be always at the end of the DECLARE section of an anonymous block, after all the necessary declarations of the anonymous block are declared.Please note that the CURSOR FOR LOOP will terminate when all of the records in the cursor have been fetched.This clause becomes meaningless if we use a single table SELECT clause as the minimum Oracle has provided us with the WHERE CURRENT OF clause for both DELETE and UPDATE statements inside a cursor’s range to make changes to the last fetched row(s) from the cursor with an ease.When we want to update or delete the cursor fetched row(s) from the database, we don’t have to form In the below code listing, the employees joined before the year 2000 are archived and during the cursor process, no other session is permitted to make any changes to those employees using the FOR UPDATE clause.The employee deletion from the transaction table is performed using the WHERE CURRENT OF clause as shown below.

Tags: , ,