tuples and consume() generates code that acts on the tuples once they are produced. Usually the parent operator calls produce() on its child and the child calls consume() on its parent once it generated the producing code. Note that produce()/consume() do not exist in the generated code but only during the code-generating phase. Let’s look at
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Treasures unearthed by hundreds of archaeologists during the ongoing construction of the controversial HS2 train line have been shown exclusively to the BBC.
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