Oracle 优化：哪个执行计划更好？

Question

我必须改进这个查询：

    SELECT sub.SDDOCO
    FROM( 
      SELECT SDSHAN, SDDOCO, SDMCU, SDLITM, SDIR03, SDVR01
      FROM PRODDTA.F4211 

      UNION ALL

      SELECT SDSHAN, SDDOCO, SDMCU, SDLITM, SDIR03, SDVR01
      FROM PRODDTA.F42119 
    )sub 
    INNER JOIN PRODDTA.F0101 tab 
         ON sub.SDSHAN = tab.ABAN8
    WHERE 
        sub.SDMCU LIKE  CONCAT(CONCAT('%',nvl(:pMCU,SDMCU)),'%') 
    AND sub.SDLITM LIKE  CONCAT(CONCAT('%',nvl(:pLITM,SDLITM)),'%') 
    AND sub.SDIR03 LIKE  CONCAT(CONCAT('%',nvl(:pIR03,SDIR03)),'%')
    AND tab.ABALKY LIKE  CONCAT(CONCAT('%',nvl(:pALKY,ABALKY)),'%')
    AND sub.SDVR01 LIKE  CONCAT(CONCAT('%',nvl(:pVR01,SDVR01)),'%')

我以这种方式修改了 WHERE 条件：

    ((:pMCU IS NOT NULL AND sub.SDMCU LIKE '%' || :pMCU || '%') OR :pMCU IS NULL)
AND ((:pLITM IS NOT NULL AND sub.SDLITM LIKE '%' || :pLITM || '%') OR :pLITM IS NULL)
AND ((:pIR03 IS NOT NULL AND sub.SDIR03 LIKE '%' || :pIR03 || '%') OR :pIR03 IS NULL)
AND ((:pVR01 IS NOT NULL AND sub.SDVR01 LIKE '%' || :pVR01 || '%') OR :pVR01 IS NULL)
AND ((:pALKY IS NOT NULL AND tab.ABALKY LIKE '%' || :pALKY || '%') OR :pALKY IS NULL)

在this link，您可以阅读这两个查询的执行计划。 哪一个更好？ 有什么改进查询的建议吗？ 我需要有结果的所有记录

编辑： 其中“F4211”表有 71,758 条记录，F42119 有 4,606,154 条记录

EDIT：F0101 表有 634,187 条记录。 当所有参数设置为 NULL 时，结果是在不合理的时间（几分钟）内记录了 4,677,925 条记录。 没有 where 子句的查询在 58 秒内需要 4,677,925 条记录

编辑： 插入代码片段我超过了最大字符数:( 对发布执行计划有何建议？

编辑： 这是执行计划：

"PLAN_TABLE_OUTPUT"
"Plan hash value: 3925457500"
" "
"-----------------------------------------------------------------------------------------------------------"
"| Id  | Operation                              | Name             | Rows  | Bytes | Cost (%CPU)| Time     |"
"-----------------------------------------------------------------------------------------------------------"
"|   0 | SELECT STATEMENT                       |                  |     2 |  1224 |   614K  (1)| 00:00:24 |"
"|   1 |  NESTED LOOPS                          |                  |     2 |  1224 |   614K  (1)| 00:00:24 |"
"|   2 |   VIEW                                 | index$_join$_004 | 31721 |  1455K| 11379   (1)| 00:00:01 |"
"|*  3 |    HASH JOIN                           |                  |       |       |            |          |"
"|   4 |     INDEX FAST FULL SCAN               | F0101_0          | 31721 |  1455K|  2414   (1)| 00:00:01 |"
"|*  5 |     INDEX FAST FULL SCAN               | F0101_3          | 31721 |  1455K|  8390   (1)| 00:00:01 |"
"|   6 |   VIEW                                 |                  |     1 |   565 |    19   (0)| 00:00:01 |"
"|   7 |    UNION ALL PUSHED PREDICATE          |                  |       |       |            |          |"
"|*  8 |     TABLE ACCESS BY INDEX ROWID BATCHED| F4211            |     1 |   417 |     9   (0)| 00:00:01 |"
"|*  9 |      INDEX RANGE SCAN                  | F4211_4          |     6 |       |     3   (0)| 00:00:01 |"
"|* 10 |     TABLE ACCESS BY INDEX ROWID BATCHED| F42119           |     1 |   422 |    10   (0)| 00:00:01 |"
"|* 11 |      INDEX RANGE SCAN                  | F42119_9         |    10 |       |     3   (0)| 00:00:01 |"
"-----------------------------------------------------------------------------------------------------------"
" "
"Predicate Information (identified by operation id):"
"---------------------------------------------------"
" "
"   3 - access(ROWID=ROWID)"
"   5 - filter(""GGG"".""ABALKY"" LIKE U'%'||NVL(:PALKY,""GGG"".""ABALKY"")||U'%')"
"   8 - filter(""SDMCU"" LIKE U'%'||NVL(:PMCU,""SDMCU"")||U'%' AND ""SDLITM"" LIKE "
"              U'%'||NVL(:PLITM,""SDLITM"")||U'%' AND ""SDIR03"" LIKE U'%'||NVL(:PIR03,""SDIR03"")||U'%' AND ""SDVR01"" "
"              LIKE U'%'||NVL(:PVR01,""SDVR01"")||U'%')"
"   9 - access(""SDSHAN""=""GGG"".""ABAN8"")"
"  10 - filter(""SDMCU"" LIKE U'%'||NVL(:PMCU,""SDMCU"")||U'%' AND ""SDLITM"" LIKE "
"              U'%'||NVL(:PLITM,""SDLITM"")||U'%' AND ""SDIR03"" LIKE U'%'||NVL(:PIR03,""SDIR03"")||U'%' AND ""SDVR01"" "
"              LIKE U'%'||NVL(:PVR01,""SDVR01"")||U'%')"
"  11 - access(""SDSHAN""=""GGG"".""ABAN8"")"

Answer 1

1 Oracle 有很好的工具来提高查询性能，例如 DBMS_SQLTUNE https://docs.oracle.com/database/121/TGSQL/tgsql_sqltune.htm#TGSQL586 一开始你可以创建调优任务

declare
  l_task_name varchar2(4000);
begin
 l_task_name := DBMS_SQLTUNE.CREATE_TUNING_TASK(
      sql_text => q'!SELECT sub.SDDOCO
FROM( 
  SELECT SDSHAN, SDDOCO, SDMCU, SDLITM, SDIR03, SDVR01
  FROM PRODDTA.F4211 
  UNION ALL
  SELECT SDSHAN, SDDOCO, SDMCU, SDLITM, SDIR03, SDVR01
  FROM PRODDTA.F42119 
)sub 
INNER JOIN PRODDTA.F0101 tab 
     ON sub.SDSHAN = tab.ABAN8
WHERE 
    sub.SDMCU LIKE  CONCAT(CONCAT('%',nvl(:pMCU,SDMCU)),'%') 
AND sub.SDLITM LIKE  CONCAT(CONCAT('%',nvl(:pLITM,SDLITM)),'%') 
AND sub.SDIR03 LIKE  CONCAT(CONCAT('%',nvl(:pIR03,SDIR03)),'%')
AND tab.ABALKY LIKE  CONCAT(CONCAT('%',nvl(:pALKY,ABALKY)),'%')
AND sub.SDVR01 LIKE  CONCAT(CONCAT('%',nvl(:pVR01,SDVR01)),'%')!'
, bind_list   => sql_binds( anydata.ConvertVarchar2('ABC'), 
            anydata.ConvertVarchar2('BCD'),
            anydata.ConvertVarchar2('CDE'),
            anydata.ConvertVarchar2('DEF'),
            anydata.ConvertVarchar2('EFG'))
, task_name   => 'TEST_TUNING_SQL_SO' 
, description => 'Task to tune a query from StackOverflow');
end;
/

你可以执行之后

begin
  DBMS_SQLTUNE.EXECUTE_TUNING_TASK (
   task_name => 'TEST_TUNING_SQL_SO');
end;
/

并检索报告并执行建议

select DBMS_SQLTUNE.REPORT_TUNING_TASK(
   task_name => 'TEST_TUNING_SQL_SO') from dual;

2 如何发布计划

您可以以文本格式（不是 HTML）生成它。并尝试仅添加包含谓词信息的计划表。如果不需要，您可以排除任何附加信息。