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 APRIL 17, 2023
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52.0 and later
Information in this document applies to any platform.
Migrated from 10g to 19c and after migration a simple count (*) is using full table scan. In 10g the plan used an INDEX scan.
The database was recently upgraded to 19c.
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