Updating fetch in plsql

08-Dec-2018 07:26

DECLARE 2 3 CURSOR c_source IS 4 SELECT * 5 FROM update_table; 6 7 TYPE aat_whole_row IS TABLE OF c_source%ROWTYPE 8 INDEX BY PLS_INTEGER; 9 10 TYPE aat_id IS TABLE OF update_table.id%TYPE 11 INDEX BY PLS_INTEGER; 12 13 aa_rows aat_whole_row; 14 aa_ids aat_id; 15 16 BEGIN 17 18 /* Fetch in one go as we are using small demo volumes... COUNT LOOP 25 26 --[complex processing goes here]-- 27 aa_rows(i):= LOWER(aa_rows(i).name); 28 aa_rows(i):= LOWER(aa_rows(i).type); 29 30 /* Assign IDs to PK array... PUT_LINE( SQL%ROWCOUNT

Both methods take advantage of the ability to perform DML on an in-line view, introduced in Oracle 9i.To confirm that this technique works as designed, we can examine the SQL Trace file, which shows us the following recursive SQL.Again we confirm that only the two target columns are updated.We have also needlessly updated the CREATED and OWNER columns (also using their existing values).

updating fetch in plsql-20

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We have potentially high levels of redundancy and resource waste here.*/ 43 aa_updates(i):= aa_rows(i).name; 44 aa_updates(i):= aa_rows(i).type; 45 46 END LOOP; 47 48 /* 49

Sep 19, 2011. The PL/SQL engine for executing all your PL/SQL code and the SQL engine for executing all you SQL statements. This means that every time. Instead of fetching or updating a single row at a time since Oracle 8i it is possible to use the bulk features in the Oracle database. This means you can fetch an.… continue reading »

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Aug 19, 2011. The Oracle bulk collect tells the SQL engine to fetch multiple rows at once and store them in a collection defined by the developer. With the addition of. Now we can turn that query into a PL/SQL cursor, process the results in bulk, and perform the required update using a FORALL statement. Incidentally, the.… continue reading »

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Apr 22, 2003. This is very convenient syntax, but it unfortunately just leaves us all hungry for the full range of record-smart SQL, most importantly the ability to perform INSERT and UPDATE operations with a record as opposed to having to "break out" all the individual fields of that record. In summary, before Oracle 9i.… continue reading »

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COUNT ' rows'; 44 45 OPEN c_char; 46 FETCH c_char BULK COLLECT INTO v_Strings2; 47 CLOSE c_char; 48 49 DBMS_OUTPUT. PUT_LINE'Cursor fetch retrieved ' v_Strings2. COUNT ' rows'; 50 51 END; 52 / First query fetched 1500 rows Second query fetched 1500 rows Cursor fetch retrieved 400 rows PL/SQL.… continue reading »

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PLSQL S5L5. Using Cursors for Update. Purpose. • If multiple users are connected to the database at the same time, the possibility exists that another user updated the rows of a particular table after you opened your cursor and fetched the rows. • We can lock rows as we open the cursor in order to prevent other users from.… continue reading »

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