code: def get_row_num_column_alias(column_list):
      for column in column_list:
          alias, col_name = column.split(".")
          if col_name == ROW_NUM_COLUMN:
              return alias
  
imports: from typing import Iterator
  import pandas
  from evadb.catalog.models.utils import VectorStoreType
  from evadb.catalog.sql_config import ROW_NUM_COLUMN
  from evadb.database import EvaDBDatabase
  from evadb.executor.abstract_executor import AbstractExecutor
  from evadb.executor.executor_utils import ExecutorError, handle_vector_store_params
  from evadb.models.storage.batch import Batch
  from evadb.plan_nodes.storage_plan import StoragePlan
  from evadb.plan_nodes.vector_index_scan_plan import VectorIndexScanPlan
  from evadb.third_party.databases.interface import get_database_handler
  from evadb.third_party.vector_stores.types import VectorIndexQuery
  from evadb.third_party.vector_stores.utils import VectorStoreFactory
  from evadb.utils.logging_manager import logger
label_desc: Use image node_id 1 for calling a global function with example usage: get_row_num_column_alias(column_list) and returns: alias