update an index on appearances by add / del

add index on appearances (question_id, voter_id) remove index on appearances (question_id) as it is now superseded by the former

update an index on appearances by add / del
add index on appearances (question_id, voter_id) remove index on appearances (question_id) as it is now superseded by the former
Luke Baker
1 parent d90fe8cd
Showing 3 changed files with 20 additions and 2 deletions Show diff stats
db/migrate/20110120202304_add_voter_id_index_on_appearances.rb
db/migrate/20110120204933_remove_question_id_index_on_appearances.rb
db/schema.rb
@@ -0,0 +1,9 @@
+class AddVoterIdIndexOnAppearances < ActiveRecord::Migration
+  def self.up
+    add_index :appearances, [:question_id, :voter_id], :name => 'index_appearances_on_question_id_voter_id'
+  end
+
+  def self.down
+    remove_index :appearances, :name => :index_appearances_on_question_id_voter_id
+  end
+end
@@ -0,0 +1,9 @@
+class RemoveQuestionIdIndexOnAppearances < ActiveRecord::Migration
+  def self.up
+    remove_index :appearances, :question_id
+  end
+
+  def self.down
+    add_index :appearances, :question_id
+  end
+end
@@ -9,7 +9,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
-ActiveRecord::Schema.define(:version => 20110119165820) do
+ActiveRecord::Schema.define(:version => 20110120204933) do
   create_table "appearances", :force => true do |t|
     t.integer  "voter_id"
@@ -26,7 +26,7 @@ ActiveRecord::Schema.define(:version =&gt; 20110119165820) do
   end
   add_index "appearances", ["lookup"], :name => "index_appearances_on_lookup"
-  add_index "appearances", ["question_id"], :name => "index_appearances_on_question_id"
+  add_index "appearances", ["question_id", "voter_id"], :name => "index_appearances_on_question_id_voter_id"
   create_table "choices", :force => true do |t|
     t.integer  "item_id"
@@ -0,0 +1,9 @@		@@ -0,0 +1,9 @@
	1	+class AddVoterIdIndexOnAppearances < ActiveRecord::Migration
	2	+ def self.up
	3	+ add_index :appearances, [:question_id, :voter_id], :name => 'index_appearances_on_question_id_voter_id'
	4	+ end
	5	+
	6	+ def self.down
	7	+ remove_index :appearances, :name => :index_appearances_on_question_id_voter_id
	8	+ end
	9	+end
@@ -0,0 +1,9 @@		@@ -0,0 +1,9 @@
	1	+class RemoveQuestionIdIndexOnAppearances < ActiveRecord::Migration
	2	+ def self.up
	3	+ remove_index :appearances, :question_id
	4	+ end
	5	+
	6	+ def self.down
	7	+ add_index :appearances, :question_id
	8	+ end
	9	+end
	@@ -9,7 +9,7 @@		@@ -9,7 +9,7 @@
9	#	9	#
10	# It's strongly recommended to check this file into your version control system.	10	# It's strongly recommended to check this file into your version control system.
11		11
12	-ActiveRecord::Schema.define(:version => 20110119165820) do	12	+ActiveRecord::Schema.define(:version => 20110120204933) do
13		13
14	create_table "appearances", :force => true do \|t\|	14	create_table "appearances", :force => true do \|t\|
15	t.integer "voter_id"	15	t.integer "voter_id"
	@@ -26,7 +26,7 @@ ActiveRecord::Schema.define(:version => 20110119165820) do		@@ -26,7 +26,7 @@ ActiveRecord::Schema.define(:version => 20110119165820) do
26	end	26	end
27		27
28	add_index "appearances", ["lookup"], :name => "index_appearances_on_lookup"	28	add_index "appearances", ["lookup"], :name => "index_appearances_on_lookup"
29	- add_index "appearances", ["question_id"], :name => "index_appearances_on_question_id"	29	+ add_index "appearances", ["question_id", "voter_id"], :name => "index_appearances_on_question_id_voter_id"
30		30
31	create_table "choices", :force => true do \|t\|	31	create_table "choices", :force => true do \|t\|
32	t.integer "item_id"	32	t.integer "item_id"