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A comment on Cardinality Estimation (2011) [pdf].
From my quick calculations, I'm getting [1.03, 0.96, 0.96, 1.05] but the table specifically has [1.05, 1.03, 0.96, 1.03]
Am I missing something here? Specifically the 2M case has a positive ratio when the HBB estimate is higher than the actual count.
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From my quick calculations, I'm getting [1.03, 0.96, 0.96, 1.05] but the table specifically has [1.05, 1.03, 0.96, 1.03]
Am I missing something here? Specifically the 2M case has a positive ratio when the HBB estimate is higher than the actual count.