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Long Parse Time Of SQLs Using Many COUNT DISTINCT Expressions And Parallel Execution In 18c (Doc ID 2554911.1)

Last updated on MAY 19, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 18.3.0.0.0 and later
Information in this document applies to any platform.

Symptoms

Long parse time of SQLs using many COUNT DISTINCT expressions and Parallel Execution in 18c

Changes

 Observed this behavior in 18c (Issue was not reproducible in earlier versions 12.2.0.1 and 12.1.0.2)

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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