How InnoDB Locates the First Record in a B‑Tree Scan Range

This article explains why locating a record in a B‑Tree index is crucial for MySQL InnoDB operations, describes scan intervals, index page structures, and details the step‑by‑step binary and sequential search process used to find the first matching record, including performance optimizations.

B-TreeBinary SearchIndex Scan

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How InnoDB Locates the First Record in a B‑Tree Scan Range