docstr: Grab the existing sql session
docstr_tok: ["Grab","the","existing","sql","session"]
code: def __init__(self, db: EvaDBDatabase):
      """
      Grab the existing sql session
      """
      super().__init__(db)
      self._sql_session = db.catalog().sql_config.session
      self._sql_engine = db.catalog().sql_config.engine
      self._serializer = PickleSerializer
  
imports: from typing import Iterator, List
  import numpy
  import pandas
  from sqlalchemy import Table, inspect
  from sqlalchemy.sql.expression import ColumnElement
  from evadb.catalog.catalog_type import ColumnType
  from evadb.catalog.models.base_model import BaseModel
  from evadb.catalog.models.column_catalog import ColumnCatalogEntry
  from evadb.catalog.models.table_catalog import TableCatalogEntry
  from evadb.catalog.schema_utils import SchemaUtils
  from evadb.catalog.sql_config import IDENTIFIER_COLUMN, ROW_NUM_COLUMN
  from evadb.database import EvaDBDatabase
  from evadb.models.storage.batch import Batch
  from evadb.parser.table_ref import TableInfo
  from evadb.storage.abstract_storage_engine import AbstractStorageEngine
  from evadb.utils.generic_utils import PickleSerializer, rebatch
  from evadb.utils.logging_manager import logger
label_desc: Use image node_id 1 to create a new SQLStorageEngine object from inherited base classes: AbstractStorageEngine with example: obj = SQLStorageEngine(db)