Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/144#discussion_r42893715
--- Diff: core/sql/optimizer/ScanOptimizer.cpp ---
@@ -8590,6 +8595,7 @@ void MDAMCostWA::compute()
// // invalidate the cache
// disjunctsFR_.reset();
// disjunctsLR_.reset();
+ MDAM_DEBUG0(MTL2, "Mdam scan lost due to exceeding cost bound");
--- End diff --
I LOVE this kind of debugging aid.
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