Re: [PR] [SPARK-46962][SS][PYTHON] Add interface for python streaming data source API and implement python worker to run python streaming data source [spark]

["chaoqin-li1123 (via GitHub)" <gi...@apache.org>]

chaoqin-li1123 commented on code in PR #45023:
URL: https://github.com/apache/spark/pull/45023#discussion_r1511914150


##########
python/pyspark/sql/datasource.py:
##########
@@ -298,6 +320,104 @@ def read(self, partition: InputPartition) -> Iterator[Union[Tuple, Row]]:
         ...
 
 
+class DataSourceStreamReader(ABC):
+    """
+    A base class for streaming data source readers. Data source stream readers are responsible
+    for outputting data from a streaming data source.
+
+    .. versionadded: 4.0.0
+    """
+
+    def initialOffset(self) -> dict:
+        """
+        Return the initial offset of the streaming data source.
+        A new streaming query starts reading data from the initial offset.
+        If Spark is restarting an existing query, it will restart from the check-pointed offset
+        rather than the initial one.
+
+        Returns
+        -------
+        dict
+            A dict whose key and values are str type.

Review Comment:
   We have agreed that the offset interface be dict or recursive dict whose key and value are primitive type offline.



-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org