Why Is the Sql Running in Parallel?
(Doc ID 1627599.1)
Last updated on OCTOBER 15, 2019
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 to 18.104.22.168 [Release 11.2]
Information in this document applies to any platform.
What is the reason for which a statement is executed in parallel even so all the conditions of having this in serial are met?
The degree for all the tables involved is set to 1
Much more even when setting:
ALTER SESSION DISABLE PARALLEL DML;
ALTER SESSION DISABLE PARALLEL DDL;
ALTER SESSION DISABLE PARALLEL QUERY;
the statement is still executed in parallel.
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