com.facebook.presto.spi

Interface ConnectorPlanOptimizer

public interface ConnectorPlanOptimizer

Given a PlanNode, return a transformed PlanNode.

The given is a highest PlanNode in the query plan, such that (1) it is a PlanNode implementation in SPI (i.e., not an internal PlanNode), and (2) all the TableScanNodes that are reachable from are from the current connector.

There could be multiple PlanNodes satisfying the above conditions. All of them will be processed with the given implementation of ConnectorPlanOptimizer. Each optimization is processed exactly once at the end of logical planning (i.e. right before AddExchanges).

Method Summary

Modifier and Type	Method and Description
PlanNode	optimize(PlanNode maxSubplan, ConnectorSession session, VariableAllocator variableAllocator, PlanNodeIdAllocator idAllocator)

Method Detail

optimize

PlanNode optimize(PlanNode maxSubplan,
                  ConnectorSession session,
                  VariableAllocator variableAllocator,
                  PlanNodeIdAllocator idAllocator)