Add latest changes from gitlab-org/gitlab@master

1 files changed, 36 insertions, 0 deletions

diff --git a/db/migrate/20191212140117_change_commit_user_mentions_commit_id_column_type.rb b/db/migrate/20191212140117_change_commit_user_mentions_commit_id_column_type.rb
new file mode 100644
index 00000000000..f30cdab3441
--- /dev/null
+++ b/db/migrate/20191212140117_change_commit_user_mentions_commit_id_column_type.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+class ChangeCommitUserMentionsCommitIdColumnType < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  OLD_INDEX = 'commit_user_mentions_on_commit_id_and_note_id_index'
+  OLD_TMP_INDEX = 'temp_commit_id_and_note_id_index'
+  NEW_TMP_INDEX = 'temp_commit_id_for_type_change_and_note_id_index'
+  NEW_INDEX = 'commit_id_and_note_id_index'
+
+  def up
+    # the initial index name is too long and fails during migration. Renaming the index first.
+    add_concurrent_index :commit_user_mentions, [:commit_id, :note_id], name: OLD_TMP_INDEX
+    remove_concurrent_index_by_name :commit_user_mentions, OLD_INDEX
+
+    change_column_type_concurrently :commit_user_mentions, :commit_id, :string
+
+    # change_column_type_concurrently creates a new index for new column `commit_id_for_type` based on existing
+    # `temp_commit_id_and_note_id_index` naming it `temp_commit_id_for_type_change_and_note_id_index`, yet keeping
+    # `temp_commit_id_and_note_id_index` for `commit_id`, that will be cleaned
+    # by `cleanup_concurrent_column_type_change :commit_user_mentions, :commit_id` in a later migration.
+    #
+    # So we'll rename `temp_commit_id_for_type_change_and_note_id_index` to initialy intended name: `commit_id_and_note_id_index`.
+
+    add_concurrent_index :commit_user_mentions, [:commit_id_for_type_change, :note_id], name: NEW_INDEX
+    remove_concurrent_index_by_name :commit_user_mentions, NEW_TMP_INDEX
+  end
+
+  def down
+    cleanup_concurrent_column_type_change :commit_user_mentions, :commit_id
+  end
+end