Is it possible to change a custom field type from a date picker to date time picker (via database)?

[Vasil'ev Nickolay]

I wonder, if it's possible to change a custom field type from a date picker to date time picker via database, given that value of both field types are stored as the same type values in the database (DATE in Oracle DB on my occasion)?

[Vasiliy Zverev · Accepted solution]

There are not only values, stored into data base, but also indexes. So, it is better to create new custiom field and copy value from old field to new one.