class_docstr: SQLite3 TaskRecord backend.
docstr: get all msg_ids, ordered by time submitted.
docstr_tok: ["get","all","msg_ids",",","ordered","by","time","submitted","."]
code: def get_history(self):
      """get all msg_ids, ordered by time submitted."""
      query = (
          """SELECT msg_id FROM '%s' ORDER by submitted ASC"""
          % self.table
      )
      cursor = self._db.execute(query)
      # will be a list of length 1 tuples
      return [tup[0] for tup in cursor.fetchall()]
  
imports: import json
  import os
  from datetime import datetime
  from dateutil.parser import parse
  from tornado import ioloop
  from traitlets import Dict, Instance, List, Unicode
  from ..util import ensure_timezone, extract_dates
  from .dictdb import BaseDB
label_desc: Use image node_id 15 for calling the SQLiteDB obj's underlying member method code with example usage: obj.get_history() and returns: unknown