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Returns an array of partial sums of elements from the source array (a cumulative sum). If the parameter <function> is provided, the values of the array elements are converted by this function before summing.

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Syntax

ARRAY_CUMULATIVE_SUM( [<function>,] array)
ParameterDescriptionSupported input types
<function>The function used to convert the array members.Any function that can convert an array
<array>The array used for the sum calculations.Any array of numeric values

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Return Type

ARRAY of the same type as the input array (must be numeric)

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Example

The following example adds 1 to each level in the levels array: 
SELECT
	ARRAY_CUMULATIVE_SUM(x -> x + 1, [ 1, 2, 3, 9 ]) AS levels;
Returns: 2,5,9,19