class_docstr: Python interface for VegaFusion Sql Dataset
docstr: Returns SQL dialect accepted by the connection
  
  :return: One of:
   - "athena"
   - "bigquery"
   - "clickhouse"
   - "databricks"
   - "datafusion"
   - "duckdb"
   - "mysql"
   - "postgres"
   - "redshift"
   - "snowflake"
code: def dialect(self) -> str:
      """
      Returns SQL dialect accepted by the connection
  
      :return: One of:
       - "athena"
       - "bigquery"
       - "clickhouse"
       - "databricks"
       - "datafusion"
       - "duckdb"
       - "mysql"
       - "postgres"
       - "redshift"
       - "snowflake"
      """
      raise NotImplementedError()
  
file_path: vegafusion/python/vegafusion/vegafusion/dataset/sql.py
imports: from abc import ABC, abstractmethod
  import pyarrow
  from typing import TYPE_CHECKING
label_desc: Use image node_id 1 for calling the SqlDataset obj's underlying member method code with example usage: obj.dialect() without return types