Infrastructure at your Service

All posts by Franck Pachot

Franck Pachot
Technology Leader
Principal Consultant

OCM 12cFranck Pachot has 20 years of experience in Oracle databases. Through his expertise as a DBA, Oracle expert, data architect, and performance specialist, he is able to cover all database areas: architecture, data modeling, database design, tuning, operation, and training. Franck knows how to enable an efficient collaboration between the developers and the operational team when it comes to troubleshooting issues or performance tuning.

RSSOracle ACEOracle ACE Franck is Oracle Certified Master (OCM 12c), Oracle ACE Director and proud member of Oraworld-team and Oak Table.

12cR2MT
12cR2 Multitenant (Oracle Press)

Authors: Anton Els, Vit Spinka, Franck Pachot
POUG
Cracow (PL), Sept. 1st

12cR2 Statistics Advisor: Do you gather statistics in the way the optimizer expects them?
OOW17
San Francisco, Oct 1st

Multitenant: Trust It by Understanding Beyond What Is Documented


Franck Pachot

ODA X6 installation: re-image

By | Database management | No Comments

The Oracle Database Appliance is shipped with a bare-metal installation which may not be the latest version. You may want to have it virtualized, or get the latest version to avoid further upgrade, or install an earlier version to be in the same configuration as another ODA already in production. The easiest for all cases is to start with a re-image as soon as the ODA is plugged. This post is not a documentation, just…

 
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Franck Pachot

12cR2 Application Containers and Foreign Keys

By | Database management | 2 Comments

Application Container brings a new way to share data among databases, and adds a new dimension to referential integrity. A foreign key in an application PDB can reference a row belonging to a root data link table. But then, should a delete on the root validate that there are no orpheans in the application PDBs? And what if those PDBs are closed at the time of this delete? Here is a small example.  

 
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Franck Pachot

12cR2 PDB refresh as a poor-man standby?

By | Database management | One Comment

Disclaimer My goal here is only to show that the Refreshable PDB feature works by shipping and applying redo, and then can synchronize a copy of the datafiles. I do not recommend to use it for disaster recovery in any production environment yet. Even if I’m using only supported features, those features were not designed for this usage, and are quite new and not stable yet. Disaster Recovery must use safe and proven technologies and…

 
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Franck Pachot

12cR2 auditing all users with a role granted

By | Database management | 2 Comments

12.1 introduced Unified Auditing where you define policies and then enable them. As with the traditional audit, you enable them for all users or for specific users. The unified auditing adds a syntax to audit all users except some listed ones. 12.2 adds a syntax to audit a group of users, defined by the role granted. This is the best way to enable a policy for a group of users, including those created later.  

 
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Franck Pachot

Which privilege for CREATE PLUGGABLE DATABASE from DB LINK?

By | Database management | One Comment

When cloning a PDB from a remote CDB you need to define a database link to be used in the CREATE PLUGGABLE DATABASE … FROM …@… command. The documentation is not completely clear about the privileges required on the source for the user defined in the database link, so here are the different possibilities. Remote clone Here is what the documentation says: So you can connect to the CDB or to the PDB. In order…

 
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Franck Pachot

12cR2 needs to connect with password for Cross-PDB DML

By | Database management | No Comments

In a previous post, I explained that Cross-PDB DML, executing an update/delete/insert with the CONTAINERS() clause, seems to be implemented with implicit database links. Connecting through a database link requires a password and this blog post is about an error you may encounter: ORA-01017: invalid username/password; logon denied This blog post also explains a consequence of this implementation, the big inconsistency of CONTAINERS() function because the implementation is completely different for queries (select) and for…

 
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