知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.022 seconds)

    First futamura projection in the context of SQL expression evaluation
    11.
    发明授权
    First futamura projection in the context of SQL expression evaluation 有权

    公开(公告)号：US11461324B2

    公开(公告)日：2022-10-04

    申请号：US16555974

    申请日：2019-08-29

    Applicant: Oracle International Corporation

    Inventor： Pit Fender ,  Alexander Ulrich ,  Laurent Daynes ,  Matthias Brantner ,  Bastian Hossbach ,  Benjamin Schlegel ,  Hassan Chafi

    IPC: G06F16/24 ,  G06F16/2453 ,  G06F16/2455 ,  G06F8/41

    Abstract: The present invention relates to execution optimization of database queries. Herein are techniques for optimal execution based on query interpretation by translation to a domain specific language (DSL), with optimizations such as partial evaluation, abstract syntax tree (AST) rewriting, just in time (JIT) compilation, dynamic profiling, speculative logic, and Futamura projection. In an embodiment, a database management system (DBMS) that is hosted on a computer generates a query tree that represents a database query that contains an expression that is represented by a subtree of the query tree. The DBMS generates a sequence of DSL instructions that represents the subtree. The sequence of DSL instructions is executed to evaluate the expression during execution of the database query. In an embodiment, an AST is generated from the sequence of DSL instructions. In an embodiment, the DSL AST is optimally rewritten based on a runtime feedback loop that includes dynamic profiling information.

    EFFICIENT DATA DECODING USING RUNTIME SPECIALIZATION
    12.
    发明申请
    EFFICIENT DATA DECODING USING RUNTIME SPECIALIZATION 审中-公开

    公开(公告)号：US20190377589A1

    公开(公告)日：2019-12-12

    申请号：US16006668

    申请日：2018-06-12

    Applicant: Oracle International Corporation

    Inventor： Bastian Hossbach ,  Jürgen Christ ,  Laurent Daynes ,  Matthias Brantner ,  Hassan Chafi ,  Christian Humer

    IPC: G06F9/455 ,  G06F17/30

    Abstract: Computer-implemented techniques described herein provide efficient data decoding using runtime specialization. In an embodiment, a method comprises a virtual machine executing a body of code of a dynamically typed language, wherein executing the body of code includes: querying a relational database, and in response to the query, receiving table metadata indicating data types of one or more columns of a first table in the relational database. In response to receiving the table metadata: for a first column of the one or more columns, generating decoding machine code to decode the first column based on the data type of the first column, and executing the decoding machine code to decode the first column of the one or more columns.

Patent Agency Ranking