migration not generate comment for mysql

[spinachomes]

when modify DbComment value or add a new field in entity,migration generated sql without comment for mysql.
it test ok for postgresql.

[spinachomes]

an other problom,when modify column properties,like length. when run migration,the column will lose exist comment

[onlycp]

This problem still exist, version: 12.11.1.

[wenzhihong2003]

this problem is also in SQLSERVER17 plantform

[rbygrave]

Ok. It isn't clear why it was closed in the first place per say - there isn't any related commit or PR etc.

Lets reopen it.