Patents by Inventor Lijian Wan

Lijian Wan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11514697
    Abstract: Herein is a probabilistic indexing technique for searching semi-structured text documents in columnar storage formats such as Parquet, using columnar input/output (I/O) avoidance, and needing minimal storage overhead. In an embodiment, a computer associates columns with text strings that occur in semi-structured documents. Text words that occur in the text strings are detected. Respectively for each text word, a bitmap, of a plurality of bitmaps, that contains a respective bit for each column is generated. Based on at least one of the bitmaps, some of the columns or some of the semi-structured documents are accessed.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: November 29, 2022
    Assignee: Oracle International Corporation
    Inventors: Jian Wen, Hamed Ahmadi, Sanjay Jinturkar, Nipun Agarwal, Lijian Wan, Shrikumar Hariharasubrahmanian
  • Publication number: 20220019784
    Abstract: Herein is a probabilistic indexing technique for searching semi-structured text documents in columnar storage formats such as Parquet, using columnar input/output (I/O) avoidance, and needing minimal storage overhead. In an embodiment, a computer associates columns with text strings that occur in semi-structured documents. Text words that occur in the text strings are detected. Respectively for each text word, a bitmap, of a plurality of bitmaps, that contains a respective bit for each column is generated. Based on at least one of the bitmaps, some of the columns or some of the semi-structured documents are accessed.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 20, 2022
    Inventors: Jian Wen, Hamed Ahmadi, Sanjay Jinturkar, Nipun Agarwal, Lijian Wan, Shrikumar Hariharasubrahmanian