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Method of converting query plans to native code

  • US 9,195,712 B2
  • Filed: 03/12/2013
  • Issued: 11/24/2015
  • Est. Priority Date: 03/12/2013
  • Status: Active Grant
First Claim
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1. A computer-implemented method for translating database queries into native machine code so that use of an interpreter which employs statically written code to process a given query can be eliminated, to improve efficiency of processing the given query, the computer-implemented method being performed by one or more processors executing computer-executable instructions for the computer-implemented method, and the computer-implemented method comprising:

  • receiving a particular database query;

    accessing a query plan based on the particular database query, the query plan having operators and specific operational parameters associated with each of the operators, the association of operators and specific operational parameters being specific to the particular database query;

    from the query plan instantiating a plurality of compiled code templates, each code template comprising compiled native machine executable code that when executed performs functionality of one of the operators from the query plan with the specific operational parameters applied in the compilation, and wherein instantiating the plurality of code templates comprises;

    generating one or more abstract syntax trees that represent metadata, imperative logic, expressions and query plans; and

    transforming the abstract syntax trees to one or more simpler data structures which are convertible to said machine executable code; and

    binding the code templates together using programmatic control flow to create native machine code for the particular database query that can be executed natively without having to process the query plan using an interpreter which employs statically written code.

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