Oracle trigger updating predicate multiple columns

25-Sep-2018 00:52 by 8 Comments

Oracle trigger updating predicate multiple columns - Sex text chat without registrasion

It creates a test table, a package to hold shared data and a trigger for each of the timing points.Each trigger extends a collection defined in the package and stores a message with the trigger name and the current action it was triggered with.

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i; END LOOP; DBMS_OUTPUT.put_line('*** FORALL - INSERT ***'); -- APPEND_VALUES hint is an 11g R2 feature, but doesn't affect timing points. l_tt_INSERT /* APPEND_VALUES */ INTO trigger_test VALUES l_tt_tab(i); DBMS_OUTPUT.put_line('*** FORALL - UPDATE ***'); -- Referencing collection columns in FORALL is only supported in 11g. l_tt_UPDATE trigger_test SET description = l_tt_tab(i).description WHERE id = l_tt_tab(i).id; DBMS_OUTPUT.put_line('*** FORALL - DELETE ***'); -- Referencing collection columns in FORALL is only supported in 11g. l_tt_DELETE FROM trigger_test WHERE id = l_tt_tab(i).id; ROLLBACK; END; / The output from this code is shown below.

Notice how the statement level triggers only fire once at the start and end of the bulk insert operation, but fire on a row-by-row basis for the bulk update and delete operations.

Make sure you understand your timing points when using bulk binds or you may get unexpected results.

*** FORALL - INSERT *** BEFORE STATEMENT - INSERT BEFORE EACH ROW - INSERT (new.id=1) AFTER EACH ROW - INSERT (new.id=1) BEFORE EACH ROW - INSERT (new.id=2) AFTER EACH ROW - INSERT (new.id=2) BEFORE EACH ROW - INSERT (new.id=3) AFTER EACH ROW - INSERT (new.id=3) BEFORE EACH ROW - INSERT (new.id=4) AFTER EACH ROW - INSERT (new.id=4) BEFORE EACH ROW - INSERT (new.id=5) AFTER EACH ROW - INSERT (new.id=5) AFTER STATEMENT - INSERT *** FORALL - UPDATE *** BEFORE STATEMENT - UPDATE BEFORE EACH ROW - UPDATE (new.id=1 old.id=1) AFTER EACH ROW - UPDATE (new.id=1 old.id=1) AFTER STATEMENT - UPDATE BEFORE STATEMENT - UPDATE BEFORE EACH ROW - UPDATE (new.id=2 old.id=2) AFTER EACH ROW - UPDATE (new.id=2 old.id=2) AFTER STATEMENT - UPDATE BEFORE STATEMENT - UPDATE BEFORE EACH ROW - UPDATE (new.id=3 old.id=3) AFTER EACH ROW - UPDATE (new.id=3 old.id=3) AFTER STATEMENT - UPDATE BEFORE STATEMENT - UPDATE BEFORE EACH ROW - UPDATE (new.id=4 old.id=4) AFTER EACH ROW - UPDATE (new.id=4 old.id=4) AFTER STATEMENT - UPDATE BEFORE STATEMENT - UPDATE BEFORE EACH ROW - UPDATE (new.id=5 old.id=5) AFTER EACH ROW - UPDATE (new.id=5 old.id=5) AFTER STATEMENT - UPDATE *** FORALL - DELETE *** BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=1) AFTER EACH ROW - DELETE (old.id=1) AFTER STATEMENT - DELETE BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=2) AFTER EACH ROW - DELETE (old.id=2) AFTER STATEMENT - DELETE BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=3) AFTER EACH ROW - DELETE (old.id=3) AFTER STATEMENT - DELETE BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=4) AFTER EACH ROW - DELETE (old.id=4) AFTER STATEMENT - DELETE BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=5) AFTER EACH ROW - DELETE (old.id=5) AFTER STATEMENT - DELETE PL/SQL procedure successfully completed.

SQL DELETE FROM trigger_test; BEFORE STATEMENT - DELETE BEFORE EACH ROW - DELETE (old.id=2) AFTER EACH ROW - DELETE (old.id=2) BEFORE EACH ROW - DELETE (old.id=1) AFTER EACH ROW - DELETE (old.id=1) AFTER STATEMENT - DELETE 2 rows deleted.

SQL From this we can see there is a single statement level before and after timing point, regardless of how many rows the individual statement touches, as well as a row level timing point for each row touched by the statement.

trigger_test_api.g_LOOP DBMS_OUTPUT.put_line(trigger_test_api.g_tab(i)); END LOOP; trigger_test_api.g_tab.delete; END trigger_test_as_trg; / COLUMN object_name FORMAT A20 SELECT object_name, object_type, status FROM user_objects; OBJECT_NAME OBJECT_TYPE STATUS -------------------- ------------------- ------- TRIGGER_TEST_API PACKAGE VALID TRIGGER_TEST TABLE VALID TRIGGER_TEST_BS_TRG TRIGGER VALID TRIGGER_TEST_BR_TRG TRIGGER VALID TRIGGER_TEST_AR_TRG TRIGGER VALID TRIGGER_TEST_AS_TRG TRIGGER VALID 6 rows selected.

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