Index on Nullable Column is Not Used in Query with ORDER BY Clause on That Column
(Doc ID 418708.1)
Last updated on OCTOBER 30, 2019
Oracle Database - Enterprise Edition - Version 126.96.36.199 to 10.2.0.2 [Release 9.2 to 10.2] Oracle Database - Standard Edition - Version 10.2.0.1 and later Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Information in this document applies to any platform.
An index on a nullable column is not used in the query with an ORDER BY clause on that column.
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