The partition is a utility process intended to facilitate the parallelization of large processing tasks via the loop block.
table T[t] = extend.range(100)
T.X = 0 // dummy initialization
T.Part = partition(10) scan t
i = -1
loop 10
i = i + 1
keep where T.Part == i
T.X = T.N^2 // here, the expensive calculation
show table "Squares" a1a4 with T.X
Annex: implementation
The partition process could be manually re-implemented as:
def process partition_bis(max: number) default 1 with
keep prev = 0
prev = if prev >= max then 1 else prev + 1
return prev