snuyanzin commented on code in PR #22842:
URL: https://github.com/apache/flink/pull/22842#discussion_r1252354619
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flink-python/pyflink/table/expression.py:
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@@ -1558,6 +1558,18 @@ def map_keys(self) -> 'Expression':
"""
return _unary_op("mapKeys")(self)
+ @property
+ def map_union(self, map2) -> 'Expression':
+ """
+ Returns a map created by merging two maps, 'map1' and 'map2'.
+ These two maps should have same data structure. If there are
overlapping keys,
Review Comment:
you can not say `same` since one could be nullable and another not...
so it should be common type
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