Question

这是我正在运行的查询：

select /*+ index(V_AMV_PLG_ORDER_HISTORY_200_MS.orders.T0 IDX_ORDER_VERSION_3) */ * 
from V_AMV_PLG_ORDER_HISTORY_200_MS 
where EXCHANGE_SK = 32 and PRODUCT_SK = 1000169

它使用的索引与我订购的索引不同。

如您所见，我从视图V_AMV_PLG_ORDER_HISTORY_200_MS查询，您可以在此处查看其SQL查询：

V_AMV_PLG_ORDER_HISTORY_200_MS view SQL Query:


SELECT AMV_PERF_PROFILES_FRONTEND.AMV_PLG_GET_SEGMENT(200, orders.ORDER_GLOBAL_DATE_TIME) AS ORDER_DATE_TIME,
SUM(orders.BASE_VOLUME) AS VOLUME,
SUM(orders.BASE_CURR_LIMIT_PRICE*orders.BASE_VOLUME)/SUM(orders.BASE_VOLUME) AS PRICE,
orders.PRODUCT_SK AS PRODUCT_SK,
orders.EXCHANGE_SK AS EXCHANGE_SK,
orders.DIRECTION_CD AS DIRECTION_CD,
orders.AGG_UNIT_CD  AS AGG_UNIT_CD,
orders.TRADER_KEY   AS EXECUTING_REPRESENTATIVE_KEY,
orders.ACCOUNT_KEY  AS ACCOUNT_KEY,
a.BUSINESS_UNIT_CD AS BUSINESS_UNIT_CD
FROM AMV_PERF_PROFILES_FRONTEND.S_AMV_ORDER_VERSION_NEW orders
INNER JOIN AMV_PERF_PROFILES_FRONTEND.S_AMV_ACCOUNT a
ON a.ACCOUNT_KEY  = orders.ACCOUNT_KEY
WHERE BASE_VOLUME > 0
GROUP BY AMV_PERF_PROFILES_FRONTEND.AMV_PLG_GET_SEGMENT(200, orders.ORDER_GLOBAL_DATE_TIME),
  orders.PRODUCT_SK,
  orders.EXCHANGE_SK,
  orders.ACCOUNT_KEY,
  a.BUSINESS_UNIT_CD,
  orders.AGG_UNIT_CD,
  orders.TRADER_KEY,
  orders.DIRECTION_CD;

他正在使用同义词S_AMV_ORDER_VERSION_NEW获取数据，该数据指向另一个Scheme，一个名为V_AMV_ORDER_VERSION的视图，并将其作为订单引用，此处的SQL查询：

V_AMV_ORDER_VERSION view Sql query:


  SELECT T1.ENTITY_KEY ,
    T2.AGG_UNIT_CD ,
    T0.BASE_CURR_LIMIT_PRICE ,
    T7.DIRECTION_CD ,
    T0.EXCHANGE_SK,
    T0.ORDER_LOCAL_DATE_TIME ,
    T0.PRODUCT_SK,
    T18.ENTITY_KEY ,
    T19.ENTITY_KEY ,
    T0.NOTIONAL_VALUE2 ,
    T0.NOTIONAL_VALUE ,
    T0.ORDER_GLOBAL_DATE_TIME ,
    T0.BASE_VOLUME ,
    T31.TRANSACTION_STATUS_CD ,
    T0.ORDER_VERSION_KEY
  FROM ETS_UDM_CDS_NEW.ORDER_VERSION T0
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.ENTITY T1
  ON T0.ACCOUNT_SK = T1.ENTITY_SK
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.AGG_UNIT T2
  ON T0.AGG_UNIT_SK = T2.ENTITY_SK
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.DIRECTION T7
  ON T0.DIRECTION_SK = T7.ENTITY_SK
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.ENTITY T18
  ON T0.LOCAL_TIME_ZONE_SK = T18.ENTITY_SK
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.ENTITY T19
  ON T0.TRADER_SK = T19.ENTITY_SK
  LEFT OUTER JOIN ETS_UDM_CDS_NEW.TRANSACTION_STATUS T31
  ON T0.TRANSACTION_STATUS_SK = T31.ENTITY_SK;

从名为ORDER_VERSION的表中获取其数据，并将其称为T0 该表有一个名为IDX_ORDER_VERSION的索引

问题是oracle忽略了我的提示，并使用了不同的索引，现在，我已经设法使用提示使oracle使用我想要的索引，当我查询从表中获取数据的视图时，我正在查询一个视图，该视图从另一个从表中获取数据的视图中获取数据。此外，该行中的第二个视图是在一个不同的方案，我使用的是同义词，所以也许这就是为什么我错过了一些东西因为我尝试了很多可能的解决方案组合，我在谷歌上发现但似乎没有什么工作..

我想说如果我向前迈出一步并直接从V_AMV_ORDER_VERSION查询（没有同义词）它可以工作，我可以让oracle使用我想要的任何索引，所以这个查询工作得很完美：

select /*+ index(orders.T0 IDX_ORDER_VERSION_5) */ * from V_AMV_ORDER_VERSION orders
where EXCHANGE_SK =32 and PRODUCT_SK = 1000169

Answer 1

嗯我和我们公司的DBA看了一会儿，看起来像全局提示表现中的Oracle错误，我们使用常规连接而不是ANSI连接创建了视图V_AMV_PLG_ORDER_HISTORY_200_MS，现在它运作正常：

V_AMV_PLG_ORDER_HISTORY_200_MS查看SQL查询：

SELECT AMV_PERF_PROFILES_FRONTEND.AMV_PLG_GET_SEGMENT(200, orders.ORDER_GLOBAL_DATE_TIME) AS ORDER_DATE_TIME,
SUM(orders.BASE_VOLUME) AS VOLUME,
SUM(orders.BASE_CURR_LIMIT_PRICE*orders.BASE_VOLUME)/SUM(orders.BASE_VOLUME) AS PRICE,
orders.PRODUCT_SK AS PRODUCT_SK,
orders.EXCHANGE_SK AS EXCHANGE_SK,
orders.DIRECTION_CD AS DIRECTION_CD,
orders.AGG_UNIT_CD  AS AGG_UNIT_CD,
orders.TRADER_KEY   AS EXECUTING_REPRESENTATIVE_KEY,
orders.ACCOUNT_KEY  AS ACCOUNT_KEY,
a.BUSINESS_UNIT_CD AS BUSINESS_UNIT_CD

FROM AMV_PERF_PROFILES_FRONTEND.S_AMV_ORDER_VERSION_NEW orders,
AMV_PERF_PROFILES_FRONTEND.S_AMV_ACCOUNT a
WHERE BASE_VOLUME > 0 AND a.ACCOUNT_KEY = orders.ACCOUNT_KEY

GROUP BY AMV_PERF_PROFILES_FRONTEND.AMV_PLG_GET_SEGMENT(200, orders.ORDER_GLOBAL_DATE_TIME),
orders.PRODUCT_SK,
orders.EXCHANGE_SK,
orders.ACCOUNT_KEY,
a.BUSINESS_UNIT_CD,
orders.AGG_UNIT_CD,
orders.TRADER_KEY,
orders.DIRECTION_CD;

Oracle忽略了带有同义词和2个视图的索引的提示

1 个答案: