THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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It has to generate the same execution plan as H2 for commonly used queries (co-located queries) - only two phases, this means there is no intermediate local task having a Sender on top of execution sub-graph and a Receiver at the bottom for such query (except cases when such behavior is forced by hints - it's helpful to delegate results aggregation to server nodes in case a requesting client have a little free memory)
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