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Parallel processing database tree structure

  • US 9,171,042 B1
  • Filed: 03/15/2013
  • Issued: 10/27/2015
  • Est. Priority Date: 02/25/2013
  • Status: Active Grant
First Claim
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1. A method for executing queries in a parallel processing database system, comprising:

  • receiving a query at a master node, the master node comprising a database catalog including metadata defining database objects;

    deriving a plurality of query plans from the query;

    transmitting the query plans and query metadata to a plurality of worker nodes, wherein the query metadata includes metadata for executing the query plans;

    determining additional metadata is needed for executing one of the plurality of query plans; and

    querying a parent node for the additional metadata; and

    querying successive ancestor nodes until the master node is reached.

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