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Yea, the guy that goes into the source code of the optimizer to figure out the cause for a poorly optimized query plan is the amateur!
by schrodinger 11y ago
Yea, the guy that goes into the source code of the optimizer to figure out the cause for a poorly optimized query plan is the amateur!
- midom 11y agoSo sad I can't see or reply to that comment anymore - I'm the author. Sorry, HN, my personal blog rarely gets that wide circulation, I should've done better job at introducing the context. This was just one of many systems that thousands of facebook engineers build and they did not think of some edge cases. We do know how to write queries or to operate our databases, in general.