On Sat, Jun 22, 2019 at 3:15 PM Floris Van Nee <florisvan...@optiver.com> wrote: > Perhaps a question: when stepping through code in GDB, is there an easy way > to pretty print for example the contents on an IndexTuple? I saw there's some > tools out there that can pretty print plans, but viewing tuples is more > complicated I guess.
Try the attached patch -- it has DEBUG1 traces with the contents of index tuples from key points during index scans, allowing you to see what's going on both as a B-Tree is descended, and as a range scan is performed. It also shows details of the insertion scankey that is set up within _bt_first(). This hasn't been adopted to the patch at all, so you'll probably need to do that. The patch should be considered a very rough hack, for now. It leaks memory like crazy. But I think that you'll find it helpful. -- Peter Geoghegan
0012-Index-scan-positioning-DEBUG1-instrumentation.patch
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