Does DDL Operations Block Readers or Select Statements?

(Doc ID 2388824.1)

Last updated on APRIL 26, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 and later
Information in this document applies to any platform.

Goal

 Does DDL block select statements?  Does taking exclusive lock on a table, can the table still be read?

Solution

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