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/* postgres can not */
USE plato;
$udf = YQL::@@(lambda '(key stream) (AsStruct
'('key key) '('summ (Collect (Condense stream (Uint32 '0) (lambda '(item state) (Bool 'False)) (lambda '(item state) (Add state item)))))
))@@;
--INSERT INTO Output
DISCARD REDUCE Input1 ON key USING $udf(cast(value as uint32) ?? 0);
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