Add indexes for better sql query performance.

db/migrate/20090907120012_add_missing_indexes.rb

@@ -0,0 +1,35 @@
+class AddMissingIndexes < ActiveRecord::Migration
+  def self.up
+    add_index "article_prices", ["article_id"]
+    
+    add_index "articles", ["supplier_id"]
+    add_index "articles", ["article_category_id"]
+    add_index "articles", ["type"]
+    
+    add_index "deliveries", ["supplier_id"]
+
+    add_index "financial_transactions", ["ordergroup_id"]
+
+    add_index "group_order_article_quantities", ["group_order_article_id"]
+    add_index "group_orders", ["order_id"]
+    add_index "group_orders", ["ordergroup_id"]
+
+    add_index "invoices", ["supplier_id"]
+    add_index "invoices", ["delivery_id"]
+
+    add_index "order_articles", ["order_id"]
+    
+    add_index "order_comments", ["order_id"]
+    
+    add_index "orders", ["state"]
+
+    add_index "stock_changes", ["delivery_id"] 
+    add_index "stock_changes", ["stock_article_id"] 
+    add_index "stock_changes", ["stock_taking_id"]
+
+    add_index "tasks", ["workgroup_id"]   
+  end
+
+  def self.down
+  end
+end

db/schema.rb

@@ -9,7 +9,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20090812110010) do
+ActiveRecord::Schema.define(:version => 20090907120012) do
 
   create_table "article_categories", :force => true do |t|
     t.string "name",        :default => "", :null => false
@@ -27,6 +27,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.datetime "created_at"
   end
 
+  add_index "article_prices", ["article_id"], :name => "index_article_prices_on_article_id"
+
   create_table "articles", :force => true do |t|
     t.string   "name",                                              :default => "",   :null => false
     t.integer  "supplier_id",                                       :default => 0,    :null => false
@@ -49,7 +51,10 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.integer  "quantity",                                          :default => 0
   end
 
+  add_index "articles", ["article_category_id"], :name => "index_articles_on_article_category_id"
   add_index "articles", ["name", "supplier_id"], :name => "index_articles_on_name_and_supplier_id"
+  add_index "articles", ["supplier_id"], :name => "index_articles_on_supplier_id"
+  add_index "articles", ["type"], :name => "index_articles_on_type"
 
   create_table "assignments", :force => true do |t|
     t.integer "user_id",  :default => 0,     :null => false
@@ -78,6 +83,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.text     "note"
   end
 
+  add_index "deliveries", ["supplier_id"], :name => "index_deliveries_on_supplier_id"
+
   create_table "financial_transactions", :force => true do |t|
     t.integer  "ordergroup_id",                               :default => 0,   :null => false
     t.decimal  "amount",        :precision => 8, :scale => 2, :default => 0.0, :null => false
@@ -86,6 +93,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.datetime "created_on",                                                   :null => false
   end
 
+  add_index "financial_transactions", ["ordergroup_id"], :name => "index_financial_transactions_on_ordergroup_id"
+
   create_table "group_order_article_quantities", :force => true do |t|
     t.integer  "group_order_article_id", :default => 0, :null => false
     t.integer  "quantity",               :default => 0
@@ -93,6 +102,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.datetime "created_on",                            :null => false
   end
 
+  add_index "group_order_article_quantities", ["group_order_article_id"], :name => "index_group_order_article_quantities_on_group_order_article_id"
+
   create_table "group_order_articles", :force => true do |t|
     t.integer  "group_order_id",                                 :default => 0, :null => false
     t.integer  "order_article_id",                               :default => 0, :null => false
@@ -113,7 +124,9 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.integer  "updated_by_user_id"
   end
 
+  add_index "group_orders", ["order_id"], :name => "index_group_orders_on_order_id"
   add_index "group_orders", ["ordergroup_id", "order_id"], :name => "index_group_orders_on_ordergroup_id_and_order_id", :unique => true
+  add_index "group_orders", ["ordergroup_id"], :name => "index_group_orders_on_ordergroup_id"
 
   create_table "groups", :force => true do |t|
     t.string   "type",                                              :default => "",    :null => false
@@ -166,6 +179,9 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.datetime "updated_at"
   end
 
+  add_index "invoices", ["delivery_id"], :name => "index_invoices_on_delivery_id"
+  add_index "invoices", ["supplier_id"], :name => "index_invoices_on_supplier_id"
+
   create_table "memberships", :force => true do |t|
     t.integer "group_id", :default => 0, :null => false
     t.integer "user_id",  :default => 0, :null => false
@@ -194,6 +210,7 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
   end
 
   add_index "order_articles", ["order_id", "article_id"], :name => "index_order_articles_on_order_id_and_article_id", :unique => true
+  add_index "order_articles", ["order_id"], :name => "index_order_articles_on_order_id"
 
   create_table "order_comments", :force => true do |t|
     t.integer  "order_id"
@@ -202,6 +219,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.datetime "created_at"
   end
 
+  add_index "order_comments", ["order_id"], :name => "index_order_comments_on_order_id"
+
   create_table "orders", :force => true do |t|
     t.integer  "supplier_id"
     t.text     "note"
@@ -213,6 +232,8 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.decimal  "foodcoop_result",    :precision => 8, :scale => 2
   end
 
+  add_index "orders", ["state"], :name => "index_orders_on_state"
+
   create_table "page_versions", :force => true do |t|
     t.integer  "page_id"
     t.integer  "lock_version"
@@ -253,6 +274,10 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
     t.integer  "stock_taking_id"
   end
 
+  add_index "stock_changes", ["delivery_id"], :name => "index_stock_changes_on_delivery_id"
+  add_index "stock_changes", ["stock_article_id"], :name => "index_stock_changes_on_stock_article_id"
+  add_index "stock_changes", ["stock_taking_id"], :name => "index_stock_changes_on_stock_taking_id"
+
   create_table "stock_takings", :force => true do |t|
     t.date     "date"
     t.text     "note"
@@ -294,6 +319,7 @@ ActiveRecord::Schema.define(:version => 20090812110010) do
 
   add_index "tasks", ["due_date"], :name => "index_tasks_on_due_date"
   add_index "tasks", ["name"], :name => "index_tasks_on_name"
+  add_index "tasks", ["workgroup_id"], :name => "index_tasks_on_workgroup_id"
 
   create_table "users", :force => true do |t|
     t.string   "nick",                   :default => "", :null => false