-- Indexes for time-decay expert scoring: dual-path matching and reviewer participation.

CREATE INDEX IF NOT EXISTS idx_notes_old_path_author
  ON notes(position_old_path, author_username, created_at)
  WHERE note_type = 'DiffNote' AND is_system = 0 AND position_old_path IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_mfc_old_path_project_mr
  ON mr_file_changes(old_path, project_id, merge_request_id)
  WHERE old_path IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_mfc_new_path_project_mr
  ON mr_file_changes(new_path, project_id, merge_request_id);

CREATE INDEX IF NOT EXISTS idx_notes_diffnote_discussion_author
  ON notes(discussion_id, author_username, created_at)
  WHERE note_type = 'DiffNote' AND is_system = 0;

CREATE INDEX IF NOT EXISTS idx_notes_old_path_project_created
  ON notes(position_old_path, project_id, created_at)
  WHERE note_type = 'DiffNote' AND is_system = 0 AND position_old_path IS NOT NULL;