[FLINK-18507][python] Move get_config implementation to TableEnvironm…

…ent (apache#12830)

flink-python/pyflink/table/table_environment.py

@@ -1006,15 +1006,17 @@ def use_database(self, database_name):
  """
  self._j_tenv.useDatabase(database_name)
 
- @abstractmethod
- def get_config(self):
+ def get_config(self) -> TableConfig:
  """
  Returns the table config to define the runtime behavior of the Table API.
 
  :return: Current table config.
- :rtype: pyflink.table.TableConfig
  """
- pass
+ if not hasattr(self, "table_config"):
+ table_config = TableConfig()
+ table_config._j_table_config = self._j_tenv.getConfig()
+ setattr(self, "table_config", table_config)
+ return getattr(self, "table_config")
 
  @abstractmethod
  def connect(self, connector_descriptor):
@@ -1617,17 +1619,6 @@ def _get_j_env(self):
  else:
  return self._j_tenv.getPlanner().getExecutionEnvironment()
 
- def get_config(self):
- """
- Returns the table config to define the runtime behavior of the Table API.
-
- :return: Current table config.
- :rtype: pyflink.table.TableConfig
- """
- table_config = TableConfig()
- table_config._j_table_config = self._j_tenv.getConfig()
- return table_config
-
  def connect(self, connector_descriptor):
  """
  Creates a temporary table from a descriptor.
@@ -1752,17 +1743,6 @@ def _get_j_env(self):
  else:
  return self._j_tenv.execEnv()
 
- def get_config(self):
- """
- Returns the table config to define the runtime behavior of the Table API.
-
- :return: Current table config.
- :rtype: pyflink.table.TableConfig
- """
- table_config = TableConfig()
- table_config._j_table_config = self._j_tenv.getConfig()
- return table_config
-
  def connect(self, connector_descriptor):
  """
  Creates a temporary table from a descriptor.