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DATABASE QUERY IN A SHARE-NOTHING DATABASE ARCHITECTURE

  • US 20140095470A1
  • Filed: 08/13/2013
  • Published: 04/03/2014
  • Est. Priority Date: 09/29/2012
  • Status: Active Grant
First Claim
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1. A method for data query in a share-nothing database, comprising:

  • obtaining, by a computer processor, a query request and generating an optimized access plan with respect to the query request, wherein the query request relates to external data stored in an external data source, and the query request further contains a definition for expected distribution of the external data;

    obtaining data distribution information related to the expected distribution of the external data based on the optimized access plan;

    transmitting the data distribution information to the external data source so that the external data source splits the external data in accordance with the data distribution information and returns the split external data in parallel; and

    executing query-related processing on the split external data in accordance with the optimized access plan.

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