October 2021 archive

Active Data Guard DML Redirection: cool feature, but may bring some security opportunities

Today is October 11th, #JoelKallmanDay, a day where the Oracle community appreciates all Joel Kallman's work and effort to improve the huge Oracle community we have. I share a lot the thoughts and feelings of what Daniel has written (https://dohdatabase.com/2021/10/11/i-never-meet-joel-but-i-have-met-his-spirit-joelkallmanday/). Unfortunately, I didn't have the chance to know him in person, even though I can …

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How to upgrade and downgrade Oracle Database 18c to 19c

Today my experiment will be upgrading 18c (18.14) to the latest 19c version (currently it is 19.12) in multitenant architecture with 2 PDBs. The idea of this scenario is to validate and test not only the upgrade process but especially the downgrade strategy. Please note I will keep the COMPATIBLE parameter of my target 19c …

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