Patents by Inventor Yucan Liu

Yucan Liu 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).

  • Schema evolution
    Patent number: 12007961
    Abstract: Techniques for schema mismatch detection and evolution are described. When data is being uploaded into a source table, schema of the data to be uploaded can be compared with the schema for the source table. If a schema mismatch is detected, the schema of the source table can be modified, and the upload can be continued without data loss.
    Type: Grant
    Filed: June 30, 2023
    Date of Patent: June 11, 2024
    Assignee: Snowflake Inc.
    Inventors: Istvan Cseri, Benoit Dageville, Ganeshan Ramachandran Iyer, Yucan Liu, Jiaqi Yan
  • Schema inference for files
    Patent number: 11989163
    Abstract: Systems and methods for inferring a schema for a text file are provided. The systems and methods perform operations including: accessing a file comprising a plurality of textual records, each textual record of the plurality of textual records being associated with one or more columns of data; sampling a set of textual records from the plurality of textural records; obtaining a hierarchy comprising a plurality of levels of schema types; determining whether an individual column of the one or more columns of data corresponding to the set of textual records is successfully associated with a first level of the plurality of levels of the schema types and, in response, associating a schema type represented by the first level with the individual column of the one or more columns of data corresponding to the plurality of textual records.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: May 21, 2024
    Assignee: Snowflake Inc.
    Inventor: Yucan Liu
  • SCHEMA INFERENCE FOR FILES
    Publication number: 20240119032
    Abstract: Systems and methods for inferring a schema for a text file are provided. The systems and methods perform operations including: accessing a file comprising a plurality of textual records, each textual record of the plurality of textual records being associated with one or more columns of data; sampling a set of textual records from the plurality of textural records; obtaining a hierarchy comprising a plurality of levels of schema types; determining whether an individual column of the one or more columns of data corresponding to the set of textual records is successfully associated with a first level of the plurality of levels of the schema types and, in response, associating a schema type represented by the first level with the individual column of the one or more columns of data corresponding to the plurality of textual records.
    Type: Application
    Filed: January 31, 2023
    Publication date: April 11, 2024
    Inventor: Yucan Liu
  • SCHEMA EVOLUTION
    Publication number: 20230401180
    Abstract: Techniques for schema mismatch detection and evolution are described. When data is being uploaded into a source table, schema of the data to be uploaded can be compared with the schema for the source table. If a schema mismatch is detected, the schema of the source table can be modified, and the upload can be continued without data loss.
    Type: Application
    Filed: June 30, 2023
    Publication date: December 14, 2023
    Inventors: Istvan Cseri, Benoit Dageville, Ganeshan Ramachandran Iyer, Yucan Liu, Jiaqi Yan
  • Schema evolution
    Patent number: 11748318
    Abstract: Techniques for schema mismatch detection and evolution are described. When data is being uploaded into a source table, schema of the data to be uploaded can be compared with the schema for the source table. If a schema mismatch is detected, the schema of the source table can be modified, and the upload can be continued without data loss.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: September 5, 2023
    Assignee: Snowflake Inc.
    Inventors: Istvan Cseri, Benoit Dageville, Ganeshan Ramachandran Iyer, Yucan Liu, Jiaqi Yan
  • Schema evolution
    Patent number: 11625367
    Abstract: Techniques for schema mismatch detection and evolution are described. When data is being uploaded into a source table, schema of the data to be uploaded can be compared with the schema for the source table. If a schema mismatch is detected, the schema of the source table can be modified, and the upload can be continued without data loss.
    Type: Grant
    Filed: September 22, 2022
    Date of Patent: April 11, 2023
    Assignee: Snowflake Inc.
    Inventors: Istvan Cseri, Benoit Dageville, Ganeshan Ramachandran Iyer, Yucan Liu, Jiaqi Yan
  • Schema inference for files
    Patent number: 11599512
    Abstract: Systems and methods for inferring a schema for a text file are provided. The systems and methods perform operations including: accessing a file comprising a plurality of textual records, each textual record of the plurality of textual records being associated with one or more columns of data; sampling a set of textual records from the plurality of textural records; obtaining a hierarchy comprising a plurality of levels of schema types; determining whether an individual column of the one or more columns of data corresponding to the set of textual records is successfully associated with a first level of the plurality of levels of the schema types and, in response, associating a schema type represented by the first level with the individual column of the one or more columns of data corresponding to the plurality of textual records.
    Type: Grant
    Filed: October 6, 2022
    Date of Patent: March 7, 2023
    Assignee: Snowflake Inc.
    Inventor: Yucan Liu