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Changing Length For Varchar Column Results In "ALGORITHM=INPLACE is not supported. Reason: Cannot change column type" (Doc ID 2387401.1)

Last updated on APRIL 18, 2018

Applies to:

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

Symptoms

 Attempting to make an online alter table change the length of a varchar column results in "ALGORITHM=INPLACE is not supported. Reason: Cannot change column type"

Cause

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