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
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@@ -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.
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