snuyanzin commented on code in PR #22717:
URL: https://github.com/apache/flink/pull/22717#discussion_r1223334014
##########
flink-python/pyflink/table/expression.py:
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@@ -1519,6 +1519,13 @@ def array_union(self, array) -> 'Expression':
"""
return _binary_op("arrayUnion")(self, array)
+ def array_concat(self, array) -> 'Expression':
+ """
+ Returns an array of the elements in the concat of array1 and array2,
allow duplicates.
Review Comment:
what is `array1` and `array2` here?
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