Remove commits table and store commit data per day

db/migrate/20190903150415_create_analytics_repository_commits_table.rb

-# frozen_string_literal: true
-
-class CreateAnalyticsRepositoryCommitsTable < ActiveRecord::Migration[5.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :analytics_repository_commits do |t|
-      t.references :project,
-        index: false,
-        foreign_key: { on_delete: :cascade },
-        null: false
-      t.binary :commit_sha,
-        null: false
-      t.datetime_with_timezone :committed_at,
-        null: false
-    end
-
-    add_index :analytics_repository_commits, [:project_id, :commit_sha], unique: true
-  end
-end

db/migrate/20190903150435_create_analytics_repository_file_edits_table.rb

@@ -14,9 +14,7 @@ class CreateAnalyticsRepositoryFileEditsTable < ActiveRecord::Migration[5.2]
         index: false,
         foreign_key: { on_delete: :cascade },
         null: false
-      t.references :analytics_repository_commit,
-        index: { name: 'index_analytics_repository_file_edits_on_commit_id' },
-        foreign_key: { on_delete: :cascade },
+      t.date :committed_date,
         null: false
       t.integer :num_edits,
         null: false,
@@ -24,8 +22,8 @@ class CreateAnalyticsRepositoryFileEditsTable < ActiveRecord::Migration[5.2]
     end
 
     add_index :analytics_repository_file_edits,
-      [:analytics_repository_file_id, :analytics_repository_commit_id, :project_id],
-      name: 'index_analytics_file_edits_on_commit_id_file_id_and_project_id',
+      [:analytics_repository_file_id, :committed_date, :project_id],
+      name: 'index_file_edits_on_committed_date_file_id_and_project_id',
       unique: true
   end
 end

db/schema.rb

@@ -93,20 +93,12 @@ ActiveRecord::Schema.define(version: 2019_09_14_223900) do
     t.index ["project_id"], name: "analytics_repository_languages_on_project_id"
   end
 
-  create_table "analytics_repository_commits", force: :cascade do |t|
-    t.bigint "project_id", null: false
-    t.binary "commit_sha", null: false
-    t.datetime_with_timezone "committed_at", null: false
-    t.index ["project_id", "commit_sha"], name: "index_analytics_repository_commits_on_project_id_and_commit_sha", unique: true
-  end
-
   create_table "analytics_repository_file_edits", force: :cascade do |t|
     t.bigint "project_id", null: false
     t.bigint "analytics_repository_file_id", null: false
-    t.bigint "analytics_repository_commit_id", null: false
+    t.date "committed_date", null: false
     t.integer "num_edits", default: 0, null: false
-    t.index ["analytics_repository_commit_id"], name: "index_analytics_repository_file_edits_on_commit_id"
-    t.index ["analytics_repository_file_id", "analytics_repository_commit_id", "project_id"], name: "index_analytics_file_edits_on_commit_id_file_id_and_project_id", unique: true
+    t.index ["analytics_repository_file_id", "committed_date", "project_id"], name: "index_file_edits_on_committed_date_file_id_and_project_id", unique: true
     t.index ["project_id"], name: "index_analytics_repository_file_edits_on_project_id"
   end
 
@@ -3811,8 +3803,6 @@ ActiveRecord::Schema.define(version: 2019_09_14_223900) do
   add_foreign_key "analytics_cycle_analytics_project_stages", "projects", on_delete: :cascade
   add_foreign_key "analytics_language_trend_repository_languages", "programming_languages", on_delete: :cascade
   add_foreign_key "analytics_language_trend_repository_languages", "projects", on_delete: :cascade
-  add_foreign_key "analytics_repository_commits", "projects", on_delete: :cascade
-  add_foreign_key "analytics_repository_file_edits", "analytics_repository_commits", on_delete: :cascade
   add_foreign_key "analytics_repository_file_edits", "analytics_repository_files", on_delete: :cascade
   add_foreign_key "analytics_repository_file_edits", "projects", on_delete: :cascade
   add_foreign_key "analytics_repository_files", "projects", on_delete: :cascade