class_docstr: This handler handles connection and execution of the PostgreSQL statements.
docstr: Check the connection of the PostgreSQL database
  :return: success status and error message if error occurs
docstr_tok: ["Check","the","connection","of","the","PostgreSQL","database",":","return",":","success","status","and","error","message","if","error","occurs"]
code: def check_connection(self) -> StatusResponse:
      """
      Check the connection of the PostgreSQL database
      :return: success status and error message if error occurs
      """
      response = StatusResponse(False)
      need_to_close = self.is_connected is False
  
      try:
          connection = self.connect()
          with connection.cursor() as cur:
              cur.execute("select 1;")
          response.success = True
      except psycopg.Error as e:
          logger.error(
              f"Error connecting to PostgreSQL {self.database}, {e}!"
          )
          response.error_message = e
  
      if response.success is True and need_to_close:
          self.disconnect()
      if response.success is False and self.is_connected is True:
          self.is_connected = False
  
      return response
  
imports: from collections import OrderedDict
  import psycopg
  from psycopg.postgres import types
  from psycopg.pq import ExecStatus
  from pandas import DataFrame
  from mindsdb_sql import parse_sql
  from mindsdb_sql.render.sqlalchemy_render import SqlalchemyRender
  from mindsdb_sql.parser.ast.base import ASTNode
  from mindsdb.integrations.libs.base import DatabaseHandler
  from mindsdb.integrations.libs.const import HANDLER_CONNECTION_ARG_TYPE
  from mindsdb.utilities import log
  from mindsdb.integrations.libs.response import HandlerStatusResponse, HandlerResponse, RESPONSE_TYPE
  import mindsdb.utilities.profiler
label_desc: Use image node_id 5 for calling the PostgresHandler obj's underlying member method code with example usage: obj.check_connection() and returns: response