inserting
change_function, a, 1, 5, TABLE_ELEMENT_NEW
set_change, hi, TABLE_ELEMENT_NEW
changing
change_function, a, 1, 6, TABLE_ELEMENT_CHANGED
deleting
change_function, a, 1, 7, TABLE_ELEMENT_REMOVED
set_change, hi, TABLE_ELEMENT_REMOVED
{
[a, 1] = 8
}