hanyuzheng7 commented on code in PR #22834:
URL: https://github.com/apache/flink/pull/22834#discussion_r1243948355
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flink-python/docs/reference/pyflink.table/expressions.rst:
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@@ -230,6 +230,7 @@ advanced type helper functions
Expression.array_position
Expression.array_remove
Expression.array_reverse
+ Expressions.array_slice
Review Comment:
Ok, I will fix it.
##########
flink-python/pyflink/table/expression.py:
##########
@@ -1512,6 +1512,19 @@ def array_reverse(self) -> 'Expression':
"""
return _binary_op("arrayReverse")(self)
+ def array_slice(self, start, length) -> 'Expression':
+ """
+ Returns an array that is a subset of the original array, extracted
based on the specified
+ `start` index and `length`. Supports both positive and negative
indices. Positive indices
+ start from 1 (the first element) while negative indices start from the
end of the array
+ (-1 being the last element). If the original array or start or length
are null, null is
+ returned. If the `length` exceeds the available elements starting from
the `start` index,
+ all elements till the end of the array are returned. If abs(start) is
greater than the
+ length of the array or start equal to 0 or length is smaller than 0 or
equal to 0, return
+ null.
Review Comment:
Ok, let me change behavior of the function.
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