Remove unused index from events table.

Closes #44467.

2 files changed, 19 insertions, 2 deletions

diff --git a/db/migrate/20180327101207_remove_index_from_events_table.rb b/db/migrate/20180327101207_remove_index_from_events_table.rb
new file mode 100644
index 00000000000..172441da65b
--- /dev/null
+++ b/db/migrate/20180327101207_remove_index_from_events_table.rb
@@ -0,0 +1,18 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveIndexFromEventsTable < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index :events, :author_id
+  end
+
+  def down
+    add_concurrent_index :events, :author_id
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index b3b2d5b0da9..3bf42080870 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180323150945) do
+ActiveRecord::Schema.define(version: 20180327101207) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -732,7 +732,6 @@ ActiveRecord::Schema.define(version: 20180323150945) do
 
   add_index "events", ["action"], name: "index_events_on_action", using: :btree
   add_index "events", ["author_id", "project_id"], name: "index_events_on_author_id_and_project_id", using: :btree
-  add_index "events", ["author_id"], name: "index_events_on_author_id", using: :btree
   add_index "events", ["project_id", "id"], name: "index_events_on_project_id_and_id", using: :btree
   add_index "events", ["target_type", "target_id"], name: "index_events_on_target_type_and_target_id", using: :btree