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Add effective index to subscriptions (#2885)

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alpaca-tc 2017-05-08 02:00:20 +09:00 committed by Eugen Rochko
parent ca05bfaac7
commit d3704fdb09
2 changed files with 13 additions and 2 deletions
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11
db/migrate/20170507141759_optimize_index_subscriptions.rb Normal file
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@ -0,0 +1,11 @@
class OptimizeIndexSubscriptions < ActiveRecord::Migration[5.0]
def up
add_index :subscriptions, [:account_id, :callback_url], unique: true
remove_index :subscriptions, [:callback_url, :account_id]
end
def down
add_index :subscriptions, [:callback_url, :account_id], unique: true
remove_index :subscriptions, [:account_id, :callback_url]
end
end

4
db/schema.rb
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@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20170425202925) do
ActiveRecord::Schema.define(version: 20170507141759) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
@ -288,7 +288,7 @@ ActiveRecord::Schema.define(version: 20170425202925) do
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.datetime "last_successful_delivery_at"
t.index ["callback_url", "account_id"], name: "index_subscriptions_on_callback_url_and_account_id", unique: true, using: :btree
t.index ["account_id", "callback_url"], name: "index_subscriptions_on_account_id_and_callback_url", unique: true, using: :btree
end
create_table "tags", force: :cascade do |t|