Striving for Optimal Performance
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optimizer_secure_view_merging and VPD

11 September 2011 Written by Christian Antognini

At page 189 of TOP I wrote the following piece of text: In summary, with the initialization parameter optimizer_secure_view_merging set to TRUE, the query optimizer checks whether view merging could lead to security issues. If this is the case, no view merging will be performed, and performance could be suboptimal as a result. For this […]

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Tracing VPD Predicates

28 February 2010 Written by Christian Antognini

Even though a number of articles and blog posts have already been written on this topic (e.g. on Pete Finnigan’s site I found references dating back from 2003), from time to time I’m still asked “How to trace predicates generated by VPD?”. Hence, here’s yet another blog post about this topic… Let’s setup the scene […]

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