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Hint: StateMap can use history information. To access the last n.th version of an attribute use "__last_n." Mind the two "_" at the beginning!

Parameter

expressions: A list of expressions to map multiple incoming attribute values to out-coming attributes. Optional each expression can have a name (in this case use ['expression', 'expressionName'])
group_by: An optional list of attributes over which the grouping should occur.

Example

Code Block

language	pql
title	Example
linenumbers	true

output = MAPSTATEMAP({
              expressions = ['auction_id * 5','sqrt(auction_id)', '__last_5.auction_id]
             }, input)

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