См. Комментарий выше:
select operation,
options,
object_name name,
trunc(bytes/1024/1024) "input(MB)",
trunc(last_memory_used/1024) last_mem,
trunc(estimated_optimal_size/1024) opt_mem,
trunc(estimated_onepass_size/1024) onepass_mem,
decode(optimal_executions, null, null,
optimal_executions||'/'||onepass_executions||'/'||
multipasses_executions) "O/1/M"
from v$sql_plan p
, v$sql_workarea w
where p.address=w.address(+)
and p.hash_value=w.hash_value(+)
and p.id=w.operation_id(+)
and p.address= ( select address
from v$sql
where sql_text like '%my_table%' )