mutating-table

I have an after update trigger (Trigger A) on table A which can make changes to table B. I also have an after update trigger (Trigger B) on table B, which makes no changes, but queries table A to some sanity checking on a denormalization. So Trigger B can fire one of two ways: if I'm directly updating table B, or if I update table A and Trigger A fires, causing an update to table B. In case 2, I get an ORA-04091: table name is mutating, trigger/function may not see it error. This seems correct. I want to check within Trigger B if table A is "in a bad state" and early exit (the sanity checks

My trigger wants to check if a 'new' manager supervises no more than 5 employees. Manager supervising only 5 people are in BLOCKED_MANAGER table(ssn,numberofemployees). Finally, every update is recorded in SUPERLOG table(date,user,old_manager,new_manager). I get no compiling error about the trigger, but when I update a superssn I get this error: SQL> update employee set superssn='666666607' where ssn='111111100'; update employee set superssn='666666607' where ssn='111111100' * ERROR at line 1: ORA-04091: Table FRANK.EMPLOYEE is mutating, the trigger/function can't read it ORA-06512: a "FRANK

I have a trigger that is fire on inserting a new record in table in that i want to insert new record in the same table. My trigger is : create or replace trigger inst_table after insert on test_table referencing new as new old as old for each row declare df_name varchar2(500); df_desc varchar2(2000); begin df_name := :new.name; df_desc := :new.description; if inserting then FOR item IN (SELECT pid FROM tbl2 where pid not in(1)) LOOP insert into test_table (name,description,pid) values(df_name,df_desc,item.pid); END LOOP; end if; end; its give a error like ORA-04091: table TEST_TABLE is

My tables: TableA (id number, state number) TableB (id number, tableAId number, state number) TableC (id number, tableBId number, state number) So items in TableC are TableB's children and items in TableB are TableA's children. Vice versa - items in TableA are TableB's parents and items in TableB are TableC's parents. I'd like to control state of parent items... let's say for example, that we have this data: TableA (id, state): 1, 40 TableB (id, tableAId, state): 1, 1, 40 2, 1, 60 TableC (id, tableBId, state): 1, 1, 40 2, 1, 50 3, 2, 60 4, 2, 70 Parent state should always hvae the smallest