ALTER TABLE ADD INDEX For Generated Timestamp Column Fails: "ERROR 1067 (42000): Invalid default value for '...'" (Doc ID 2161925.1)

Last updated on MARCH 23, 2020

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.

When trying to add an index to a generated column of the timestamp data type, the ALTER TABLE statement fails like:

The issue may start if explicit_defaults_for_timestamp has been disabled (which is the default) or the SQL mode has been changed.

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In this Document

Symptoms

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