Christian Bilien's Oracle performance and tuning blog

SQL can execute in wrong schema (10.2)

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Symptoms are: wrong results from SELECT AND data corruption for DML

Although this post is off-topic, I think it is worth sharing one of the nastiest Oracle bug I ever encountered (I am not one of the Oracle pioneer, but I have nonetheless seen a number of them in my life). This is documented in Note:392673.1, which says it is only appearing in 10.1, (for which the manifestations are very rare), but with a much higher chance of occurring in 10.2.

This problem can occur only if all of the following are true:

The note says that the problem is related to reload of aged out cursors, and indeed I experienced it because statistics were calculated before the above conditions were met.

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