The database has reported the error 'ORA-04091: table <table_name> is mutating, trigger/function may not see it'. What is one possible explanation?
A statement trigger fired by your statement has executed an improperly formed SELECT, resulting in a large cartesian product.
A statement trigger fired by your statement has attempted to select from its triggering table.
You have attempted to change a table currently being updated by a row trigger fired by another user.
A row trigger fired by your statement has attempted to access its triggering table.
Another user has changed a table referenced by a row trigger fired by your statement.