oracle触发器--if else demo

 CREATE OR REPLACE Trigger trig_solr_index_el_lesson
   After Update of lessonid, lessonname, lessongoal, note, teachername, teacherid, classidname, classid, crtime, status Or Delete or insert On el_lesson
   For Each Row
 declare
   -- local variables here
   new_status number;
 begin
   new_status := :NEW.status;
   if inserting then
     begin
       INSERT INTO solr_index
         (id, docid, type)
       VALUES
         (solr_index_seq.NEXTVAL, :NEW.lessonid, 'add');
     end;
   end if;

   if updating then
   --对比老的状态和新的状态
     if new_status = -1 and :OLD.status != -1 then

       INSERT INTO solr_index
         (id, docid, type)
       VALUES
         (solr_index_seq.NEXTVAL, :OLD.lessonid, 'delete');

     else
       INSERT INTO solr_index
         (id, docid, type)
       VALUES
         (solr_index_seq.NEXTVAL, :OLD.lessonid, 'update');

     end if;
   end if;

   if deleting then
     begin
       INSERT INTO solr_index
         (id, docid, type)
       VALUES
         (solr_index_seq.NEXTVAL, :OLD.lessonid, 'delete');
     end;
   end if;
 end;