Subtree for an aggregation system

摘要

A subtree within a global tree of nodes is created by determining a predicate condition. The predicate condition is disseminated to the nodes in the global tree. For each node in the global tree, a determination of whether the node belongs to the subtree is performed, and an indication of whether the node belongs to the subtree is stored. After the subtree is created, a query corresponding to the subtree is put to the subtree for resolution.