class_docstr: Engine spec for Druid.io
class_docstr_tok: ["Engine","spec","for","Druid.io"]
docstr: Convert from number of seconds since the epoch to a timestamp.
docstr_tok: ["Convert","from","number","of","seconds","since","the","epoch","to","a","timestamp","."]
code: def epoch_to_dttm(cls) -> str:
      """
      Convert from number of seconds since the epoch to a timestamp.
      """
      return "MILLIS_TO_TIMESTAMP({col} * 1000)"
  
file_path: superset/superset/db_engine_specs/druid.py
imports: from __future__ import annotations
  import json
  import logging
  from datetime import datetime
  from typing import Any, TYPE_CHECKING
  from sqlalchemy import types
  from superset import is_feature_enabled
  from superset.constants import TimeGrain
  from superset.db_engine_specs.base import BaseEngineSpec
  from superset.db_engine_specs.exceptions import SupersetDBAPIConnectionError
  from superset.exceptions import SupersetException
  from superset.utils import core
label_desc: Use image node_id 4 for calling the DruidEngineSpec obj's underlying member method code with example usage: obj.epoch_to_dttm(cls) and returns: str