cakephp/cakephp — pull request #557 by sime (2012-03-12 10:41:12+00:00)
Title: array_merge breaks CakeSchema column type change #2672

Changing a column type from VARCHAR to DATETIME is not possible in CakeSchema.

The array_merge will add unnecessary properties and thus produce invalid SQL.

I'm not sure that skipping the array_merge all together and simply assigning the value is the best solution, but is does resolve the above problem.