Tag Archives: subquery factoring

CONNECT BY oddity

This week I’ve seen an issue with a CONNECT BY query: for some reason Oracle 10.2.0.4 decided to build a weird plan (the query is weird too, but that’s not my point here :)). An explanation of why that happened looks interesting, so here it is.

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Control file sequential read

There was a thread recently on the OTN forum (it’s currently down, that’s why I’m writing in the blog; here is a stale version of the page from Google cache; at the time of writing this version had 1 comment) about reasons for control file sequential read accounted to particular query.

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