MySQL Server Error Log Contains: [Warning] Unsafe Statement Written to the Binary Log Using Statement Format Since BINLOG_FORMAT = STATEMENT (Doc ID 1507801.1)

Last updated on SEPTEMBER 04, 2023

Applies to:

Symptoms

When executing a query like INSERT ... ON DUPLICATE KEY ... for a table with more than one unique key, the following warning is written to the error log:

Changes

Either of the following changes may trigger the warning to start occuring:

• MySQL has been upgraded from MySQL 5.0 or earlier to MySQL 5.1 or later.
• The binary log format (binlog_format) has been changed from ROW or MIXED to STATEMENT.

Cause

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