公开(公告)号：US20250094403A1

公开(公告)日：2025-03-20

申请号：US18393279

申请日：2023-12-21

Applicant: Snowflake Inc.

Inventor： Srilakshmi Chintala ,  Jianzhun Du ,  Naresh Kumar ,  Srinath Shankar ,  Leonhard Franz Spiegelberg ,  Eric Shawn Vandendberg ,  Andong Zhan ,  Yun Zou

IPC: G06F16/22 ,  G06F16/11 ,  G06F16/242 ,  G06F16/2453

Abstract: A method provides deterministic row ordering for query result sets in a database system. A framework receives a query referencing a database table and generating a row index column in response. The framework generates the row index column that involves determining an order associated with source files underlying the referenced table and assigns each table row a unique index value based on the file order and row position within the files. The framework executes the received query to produce a result set ordered by the generated row index column. The framework determines row order based on analyzing underlying data file metadata and facilitates returning the result set with consistent, reliable ordering, enabling stable positional-based access semantics when querying distributed database tables.