def get_all(self, collection: str = DEFAULT_COLLECTION) -> Dict[str, dict]:
        """
        Get all values from the store.

        Args:
            collection (str): collection name

        """
        from sqlalchemy import select

        self._initialize()
        with self._session() as session:
            results = session.execute(
                select(self._table_class).filter_by(namespace=collection)
            )
            results = results.scalars().all()
        return {result.key: result.value for result in results} if results else {}

        Get all values from the store.

        Args:
            collection (str): collection name

        
llama-index-integrations/storage/kvstore/llama-index-storage-kvstore-postgres/llama_index/storage/kvstore/postgres/base.py