dianfu commented on a change in pull request #8401: [FLINK-12407][python] Add
all table operators align Java Table API.
URL: https://github.com/apache/flink/pull/8401#discussion_r283166998
##########
File path: flink-python/pyflink/table/table.py
##########
@@ -106,6 +113,344 @@ def where(self, predicate):
"""
return Table(self._j_table.where(predicate))
+ def group_by(self, fields):
+ """
+ Groups the elements on some grouping keys. Use this before a selection
with aggregations
+ to perform the aggregation on a per-group basis. Similar to a SQL
GROUP BY statement.
+
+ Example:
+ ::
+ >>> tab.group_by("key").select("key, value.avg")
+
+ :param fields: Group keys.
+ :return: The grouped table.
+ """
+ return GroupedTable(self._j_table.groupBy(fields))
+
+ def distinct(self):
+ """
+ Removes duplicate values and returns onl
Review comment:
the comments is not complete.
----------------------------------------------------------------
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.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
