Oracle check index column關於「Oracle force index」標籤，搜尋引擎有相關的訊息討論：
Force use of index even when index value in where clause isasktom.oracle.com › pls › apexHow to force query to use an Index - Oracle Communitiescommunity.oracle.com › ... › General Database DiscussionsWhy would Oracle ignore a "perfect" index? - Stack Overflowstackoverflow.com