查找全表扫描比较严重的SQL方法1

分为两步，这样查询比较快些

1.首先定位SQL_id

select SQL_ID

from v$sql_plan v

where v.operation = 'TABLE ACCESS'

and v.OPTIONS = 'FULL'

and length(object_owner)=4

and object_owner like 'XX%'

and io_cost>10000

and exists (select 1 from v$session_longops r where r.sql_id=v.sql_id)

2.然后查询相关信息（重要的参考，执行次数，程序端）

select sql_text,

sql_id,

executions,

parse_calls,

disk_reads,

buffer_gets,

SHARABLE_MEM,

cput_time,

module,

parsing_schema_name

from v$sqlarea

where sql_id in ('3z0hqrbqb8344',

'3bq1vgtcwc73h',

'cjrgdu5qpwbym',

'865n3jzy70d3s'')