Sql Oracle 12c触发器

Question

I need some help. I'm trying to create a Trigger that execute a procedure whenever insert, delete or update operations are done on a specific table. This is the trigger

CREATE OR REPLACE NONEDITIONABLE TRIGGER NQDI.GAV_TRG 
AFTER INSERT or UPDATE or DELETE ON D_GAV
FOR EACH ROW
BEGIN
    PRC_FILL_D_GAV(:old.report_name);
END;

Unofortunately, since the trigger starts before any commit has been done and I need to read from the same table, it gives me the 'D_GAV table is being modified can't be read' error. Besides, the FOR EACH ROW makes the trigger start for every record changed, while I want the trigger to start only at the end, when every update, insert or delete has been committed, but I haven't find a way to preserve the :old.report_name while doing this. I know I could do what I want with an "up and running process", but I'd like to avoid that. Is there any other solution that I'm overlooking?

Answer 1

You want a compound trigger . After each row event you insert the data into an array. And after the statement you loop through the data and call your procedure.

create or replace trigger nqdi.gav_trg
for insert or update or delete on d_gav compound trigger

  type type_table_of_gav is table of d_gav%rowtype;
  v_gavs type_table_of_gav := type_table_of_gav();

  after each row is
  begin
    v_gavs.extend(1);
    v_gavs(v_gavs.count).report_name := coalesce(:old.report_name, :new.report_name);
  end after each row;

  after statement is
  begin
    for i in 1 .. v_gavs.count loop
      prc_fill_d_gav(v_gavs(i).report_name);
    end loop;
  end after statement;

end gav_trg;