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Optimizer Does Not Use Index For Like Predicates With Linguistic Indexes (Optimizer Limitations) (Doc ID 3063704.1)

Last updated on DECEMBER 24, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Gen 2 Exadata Cloud at Customer - Version N/A and later
Information in this document applies to any platform.

Symptoms

The optimizer does not use the index for 'like' predicates with linguistic indexes, resulting in sub-optimal execution plans. This is not a bug but necessary behavior.

Changes

 The issue could be reproduced using a simple test case:

 

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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