Query with multiple dblinks in ADG / read-only database fails with ORA-16000 (Doc ID 2462936.1)

Last updated on JULY 20, 2024

Applies to:

Symptoms

In an active Data Guard (ADG) database, execution of a select statement using multiple database links, for example:

select * from table@dblink1
union
select * from table@dblink2
union
select * from table@dblink3;

fails with the following error:

ORA-16000: database or pluggable database open for read-only access
*Cause: The database or pluggable database was opened for read-only access.
  Attempts to modify the database using DML or DDL statements generate this error.
*Action: In order to modify the database or pluggable database, it must first be shut down and reopened for read/write access.

Cause

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.