查看oracle 真实执行计划

一共3个step；
step1:在sql执行时，增加hint： /*+gather_plan_statistics*/
step2：查出sql的sql id: select * from v$sql s where s.SQL_TEXT like 'SELECT /*+monitor*/TT.*%'
step3:执行下面sql查看真实执行计划；
SELECT
sp.last_starts AS "starts",

sp.last_output_rows AS "rows",

round(sp.last_elapsed_time / 1000000, 2) AS TIME,

sp.last_cr_buffer_gets bf,

sp.depth d,

rtrim(lpad(' ', 2 * (depth - 1)) || operation ||
decode(options, NULL, '', ' ' || options)) "Explain plan",

decode(id,
0,
'------------- ',
substr(decode(substr(object_name, 1, 7),
'SYS_LE_',
NULL,

object_name) || ' ',
1,
30)) AS "object",