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Apr 29, 2024 · Databases

MySQL 5.7 Crash Analysis: BLOB INSERT … ON DUPLICATE Bug and Its Fix

This article analyzes a MySQL 5.7.20 crash that occurs during INSERT operations on BLOB columns with INSERT … ON DUPLICATE syntax, explains the underlying bug in the copy_blob_value function, shows how to reproduce and locate it with gdb, and provides the fix introduced in MySQL 5.7.22.