```ruby
module Arel
  ###
  # FIXME hopefully we can remove this
  module Crud
    def compile_update values
      um = UpdateManager.new @engine

      if Nodes::SqlLiteral === values
        relation = @ctx.from
      else
        relation = values.first.first.relation
      end
      um.table relation
      um.set values
      um.take @ast.limit.expr if @ast.limit
      um.order(*@ast.orders)
      um.wheres = @ctx.wheres
      um
    end

    # FIXME: this method should go away
    def update values
      if $VERBOSE
        warn <<-eowarn
update (#{caller.first}) is deprecated and will be removed in Arel 4.0.0. Please
switch to `compile_update`
        eowarn
      end

      um = compile_update values
      @engine.connection.update um.to_sql, 'AREL'
    end

    def compile_insert values
      im = create_insert
      im.insert values
      im
    end

    def create_insert
      InsertManager.new @engine
    end

    def compile_delete
      dm = DeleteManager.new @engine
      dm.wheres = @ctx.wheres
      dm.from @ctx.froms
      dm
    end

  end
end
```

Remove deprecated calls to `update` with preference to using `compile_update` and then calling `to_sql` on the resulting object to execute the SQL
user
```ruby
module Arel
  ###
  # FIXME hopefully we can remove this
  module Crud
    def compile_update values
      um = UpdateManager.new @engine

      if Nodes::SqlLiteral === values
        relation = @ctx.from
      else
        relation = values.first.first.relation
      end
      um.table relation
      um.set values
      um.take @ast.limit.expr if @ast.limit
      um.order(*@ast.orders)
      um.wheres = @ctx.wheres
      um
    end

    def compile_insert values
      im = create_insert
      im.insert values
      im
    end

    def create_insert
      InsertManager.new @engine
    end

    def compile_delete
      dm = DeleteManager.new @engine
      dm.wheres = @ctx.wheres
      dm.from @ctx.froms
      dm
    end

  end
end
```
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