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After Upgrade A Query Is Using Full Table Scan in 19c Over Index Scan That Was Used In 10g (Doc ID 2874015.1)

Last updated on JUNE 16, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 19.10.0.0.0 and later
Information in this document applies to any platform.

Symptoms

Migrated from 10g to 19c and after migration a simple count (*) is using full table scan.  In 10g the plan used an INDEX scan.

Changes

The database was recently upgraded to 19c.

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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