Supports Input Presorting for Some Aggregate Functions in MaxCompute SQL

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0.0.201

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MaxCompute - Supports Input Presorting for Some Aggregate Functions in MaxCompute SQL

Jul 30 2021

MaxCompute SQL allows you to presort the input of WM_CONCAT, COLLECT_LIST, and UDAFs.

Content

Target customers: developers and analysts. Features released: In MaxCompute SQL, when you use the aggregate function WM_CONCAT or COLLECT_LIST or a UDAF that is sensitive to the input order, you can use the WITHIN GROUP (ORDER BY col1[, col2...]) clause to specify the columns by which you want to sort input. In this case, the input of the aggregate function is sorted.

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