How to upate a field from another field's value?

General Discussion
1

Gentlemen,
I need update a column from another column, like

    update mytable set field1 = field2, field3 = field4*2
I know there is update construction in LiquiBase but I can point constants only, i.e.
       

as a result field1’s value will be ‘field2’ string. So how can I point fields and expressions for update?

2

The tag does only support constants.  If you want to use a more complex update statement, you will need to to use the tag.  That allows you to have

    update mytable set field1 = field2, field3 = field4*2

      Nathan