PLAN_HASH_VALUE - How equal (and stable?) are your execution plans - part 1
http://oracle-randolf.blogspot.tw/2009/07/planhashvalue-how-equal-and-stable-are.htmlOracleprovidesinrecentreleasesthePLAN_HASH_VALUEinformation,whichaccordingtothedocumentation,isthefollowing:"Numeri