Merge branch '331829-remove-notes-trigram-index' into 'master'

Remove trigram index on notes

See merge request gitlab-org/gitlab!71982

db/migrate/20211008043855_remove_notes_trigram_index.rb

+# frozen_string_literal: true
+
+class RemoveNotesTrigramIndex < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  NOTES_TRIGRAM_INDEX_NAME = 'index_notes_on_note_trigram'
+
+  def up
+    remove_concurrent_index_by_name(:notes, NOTES_TRIGRAM_INDEX_NAME)
+  end
+
+  def down
+    add_concurrent_index :notes, :note, name: NOTES_TRIGRAM_INDEX_NAME, using: :gin, opclass: { content: :gin_trgm_ops }
+  end
+end

db/schema_migrations/20211008043855

+166ae24ae4856488c81a71c650dca038c8cd7cb2221545e84431e118da097688
\ No newline at end of file

db/structure.sql

@@ -26577,8 +26577,6 @@ CREATE INDEX index_notes_on_discussion_id ON notes USING btree (discussion_id);
 
 CREATE INDEX index_notes_on_line_code ON notes USING btree (line_code);
 
-CREATE INDEX index_notes_on_note_trigram ON notes USING gin (note gin_trgm_ops);
-
 CREATE INDEX index_notes_on_noteable_id_and_noteable_type_and_system ON notes USING btree (noteable_id, noteable_type, system);
 
 CREATE INDEX index_notes_on_project_id_and_id_and_system_false ON notes USING btree (project_id, id) WHERE (NOT system);