Changes for redmine using Oracle DB

_attributes.html.erb

- <p><%= f.text_field :start_date, :size => 10, :disabled => !@issue.leaf?, :required => @issue.required_attribute?('start_date') %><%= calendar_for('issue_start_date') if @issue.leaf? %></p>
+ <p><%= f.text_field :start_date, :size => 10, :disabled => !@issue.leaf?, :required => @issue.required_attribute?('start_date'), :value => @issue.start_date ? @issue.start_date.strftime(Setting.date_format) : "" %><%= calendar_for('issue_start_date') if @issue.leaf? %></p>

oracle.rb

ActiveSupport.on_load(:active_record) do
 ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.class_eval do
    self.emulate_dates_by_column_name = true
  end
end

query.rb

   def has_column?(column)
+    return false if !column_names.kind_of?(Array)
     column_names && column_names.include?(column.is_a?(QueryColumn) ? column.name : column)
   end