class_docstr: SQL connectors are used to connect to SQL databases in different dialects.
class_docstr_tok: ["SQL","connectors","are","used","to","connect","to","SQL","databases","in","different","dialects","."]
docstr: Return the hash of the SQL table columns.
  
  Returns:
      str: The hash of the SQL table columns.
docstr_tok: ["Return","the","hash","of","the","SQL","table","columns",".","Returns",":","str",":","The","hash","of","the","SQL","table","columns","."]
code: def column_hash(self):
      """
      Return the hash of the SQL table columns.
  
      Returns:
          str: The hash of the SQL table columns.
      """
      return self._get_column_hash()
  
imports: import re
  import os
  import pandas
  from pandasai.exceptions import MaliciousQueryError
  from .base import BaseConnector, SQLConnectorConfig, SqliteConnectorConfig
  from .base import BaseConnectorConfig
  from sqlalchemy import create_engine, text, select, asc
  from sqlalchemy.engine import Connection
  from functools import cached_property, cache
  import hashlib
  from ..helpers.path import find_project_root
  from ..constants import DEFAULT_FILE_PERMISSIONS
  from typing import Union
  import time
label_desc: Use image node_id 16 for calling the SQLConnector obj's underlying member method code with example usage: obj.column_hash() and returns: self