t.Fatalf("failed to migrate table, got error: %v", err)
			}
			test.checkFunc(t)
		})
	}

	if DB.Dialector.Name() != "sqlserver" {
		// In SQLServer, If an index or constraint depends on the column,
		// this column will not be able to run ALTER
		// see https://stackoverflow.com/questions/19460912/the-object-df-is-dependent-on-column-changing-int-to-double/19461205#19461205

		// See golang.org/issue/6563.
		pos := (*r.Expr).Pos()
		if x, ok := expr.(*ast.Ident); ok {
			expr = &ast.Ident{NamePos: pos, Name: x.Name}
		}

		// Change AST, because some later processing depends on it,
		// and also because -godefs mode still prints the AST.
		old := *r.Expr
		*r.Expr = expr

		// Record source-level edit for cgo output.
		if !r.Done {