class_docstr: This handler handles connection and execution of the Apache Pinot statements.
class_docstr_tok: ["This","handler","handles","connection","and","execution","of","the","Apache","Pinot","statements","."]
docstr: Close any existing connections
  
  Should switch self.is_connected.
docstr_tok: ["Close","any","existing","connections","Should","switch","self.is_connected","."]
code: def disconnect(self):
      """Close any existing connections
  
      Should switch self.is_connected.
      """
      self.is_connected = False
      return
  
imports: from typing import Optional
  from collections import OrderedDict
  import pandas
  import pinotdb
  import requests
  from requests.exceptions import InvalidSchema
  import json
  from mindsdb_sql import parse_sql
  from mindsdb_sql.render.sqlalchemy_render import SqlalchemyRender
  from mindsdb.integrations.libs.base import DatabaseHandler
  from pinotdb.sqlalchemy import PinotDialect
  from mindsdb_sql.parser.ast.base import ASTNode
  from mindsdb.utilities import log
  from mindsdb.integrations.libs.response import HandlerStatusResponse, HandlerResponse, RESPONSE_TYPE
  from mindsdb.integrations.libs.const import HANDLER_CONNECTION_ARG_TYPE
label_desc: Use image node_id 4 for calling the PinotHandler obj's underlying member method code with example usage: obj.disconnect() without return types