Extra NESTED LOOPS Step In Explain Plan on 11g and Above (Doc ID 978496.1)

Last updated on MARCH 26, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.6 and later
Information in this document applies to any platform.

Symptoms

When looking at the access path for a query in 11g, the plan looks different when compared to 10g.
The 11g plan contains an extra nested loops step.
The row source plan is the same as the explain plan.

For example in 11g a plan might look like:

Changes

Moving to 11g from an earlier release.

Cause

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