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fix seeks

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jorenchik 2024-05-06 22:59:26 +03:00
parent 5f19876f7a
commit 226bf240d6
1 changed files with 3 additions and 2 deletions
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@ -90,8 +90,9 @@ for each tuple tr in r: (for each tuple ts in s: test pair (tr, ts))
``` ```
Block transfer cost: $n_r ∗ b_s + b_r$ block transfers would be required, Block transfer cost: $n_r ∗ b_s + b_r$ block transfers would be required,
where $b_r$ -- blocks in relation $r$, same for $s$. Seek count depends where $b_r$ -- blocks in relation $r$, same for $s$. Each scan of the inner
on how many buffers are available. relation requires one seek, and the scan of the outer relation requires one
seek per block, leading to a total of $2 ∗b_r$ seeks.
== Block-nested join == Block-nested join