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Add effective index to subscriptions (#2885)
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db/migrate/20170507141759_optimize_index_subscriptions.rb
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11
db/migrate/20170507141759_optimize_index_subscriptions.rb
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@ -0,0 +1,11 @@
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class OptimizeIndexSubscriptions < ActiveRecord::Migration[5.0]
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def up
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add_index :subscriptions, [:account_id, :callback_url], unique: true
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remove_index :subscriptions, [:callback_url, :account_id]
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end
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def down
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add_index :subscriptions, [:callback_url, :account_id], unique: true
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remove_index :subscriptions, [:account_id, :callback_url]
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end
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end
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@ -10,7 +10,7 @@
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#
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#
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# It's strongly recommended that you check this file into your version control system.
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# It's strongly recommended that you check this file into your version control system.
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ActiveRecord::Schema.define(version: 20170425202925) do
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ActiveRecord::Schema.define(version: 20170507141759) do
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# These are extensions that must be enabled in order to support this database
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# These are extensions that must be enabled in order to support this database
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enable_extension "plpgsql"
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enable_extension "plpgsql"
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@ -288,7 +288,7 @@ ActiveRecord::Schema.define(version: 20170425202925) do
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t.datetime "created_at", null: false
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.datetime "updated_at", null: false
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t.datetime "last_successful_delivery_at"
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t.datetime "last_successful_delivery_at"
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t.index ["callback_url", "account_id"], name: "index_subscriptions_on_callback_url_and_account_id", unique: true, using: :btree
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t.index ["account_id", "callback_url"], name: "index_subscriptions_on_account_id_and_callback_url", unique: true, using: :btree
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end
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end
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create_table "tags", force: :cascade do |t|
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create_table "tags", force: :cascade do |t|
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