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Combining Streaming And Navigation For Evaluating XML Queries

  • US 20090125480A1
  • Filed: 11/08/2007
  • Published: 05/14/2009
  • Est. Priority Date: 11/08/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented method comprising:

  • rewriting an original query into a rewritten query, said original query including;

    first path-based expressions that evaluate to first one or more values, andsecond path-based expressions;

    wherein the rewritten query includes first rewritten expressions that cause the first one or more values to be computed using streaming evaluation;

    wherein the rewritten query includes second rewritten expressions that correspond to said second path-based expressions; and

    computing the first written expressions using a streaming evaluation; and

    computing the second rewritten expressions using XML index evaluation.

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