公开(公告)号：US11593212B1

公开(公告)日：2023-02-28

申请号：US17804700

申请日：2022-05-31

Applicant: Snowflake Inc.

Inventor： Selcuk Aya ,  Leonid Baraznenok ,  Jaeha Lee ,  Adrian Peter Neumann ,  Ryan Michael Thomas Shelly ,  Zerui Wei ,  Jiaqi Yan

IPC: G06F16/00 ,  G06F11/14 ,  G06F11/07 ,  G06F16/215

Abstract: Embodiments of the present disclosure may provide a data protection system that performs identification of errors from queries on a database. The data protection system can further identify corrupted data from additional errors, are difficult to detect, and occur between layers of data in the database system. The data protection system can perform corrections of the error data by rebuilding database data or removing the corrupted data.

公开(公告)号：US20250131017A1

公开(公告)日：2025-04-24

申请号：US18917533

申请日：2024-10-16

Applicant: Snowflake Inc.

Inventor： Varun Ganesh ,  Kevin Ali Li ,  Ryan Michael Thomas Shelly ,  Jiaqi Yan

IPC: G06F16/28

Abstract: A method includes sampling, by at least one hardware processor, a table using a clustering key to obtain a set of batches. Each batch of the set of batches includes a set of partitions of the table. A clustering job is performed for at least one batch of the set of batches. A machine processing cost associated with the clustering job is determined on a per-row basis. A total clustering cost associated with clustering data in the table is determined based on the machine processing cost on the per-row basis.

公开(公告)号：US12235985B2

公开(公告)日：2025-02-25

申请号：US18359360

申请日：2023-07-26

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Thierry Cruanes ,  Subramanian Muralidhar ,  Nicola Dan Onose ,  Ryan Michael Thomas Shelly ,  Brian Smith ,  Jaeyun Noh

IPC: G06F21/00 ,  G06F16/245 ,  G06F16/248 ,  G06F21/62 ,  H04L9/32 ,  H04L9/40

Abstract: Techniques described herein can allow users to share cached results of an original query with other users while protecting sensitive information. The techniques described herein can check whether the other users have access to the underlying data queried before allowing those users to see the stored query results. That is, the system may perform privilege checks on the shared users before giving them access to the stored query results but without having to re-run the original query.

公开(公告)号：US20230229676A1

公开(公告)日：2023-07-20

申请号：US17896446

申请日：2022-08-26

Applicant: SNOWFLAKE INC.

Inventor： Yi Fang ,  Varun Ganesh ,  Xinglian Liu ,  Ryan Michael Thomas Shelly ,  Jiaqi Yan ,  Yizhi Zhu

IPC: G06F16/28

CPC classification number: G06F16/285

Abstract: Embodiments of the present disclosure describe systems, methods, and computer program products for improving query processing of a database. An example method can include: storing table data for a table in a plurality of micro-partitions, each micro-partition comprising a portion of the table data for the table; for each micro-partition of the plurality of micro-partitions, storing metadata for the micro-partition in at least one of a plurality of expression properties; and selecting, by a processing device, a subset of the plurality of expression properties to be grouped into a grouping expression property based at least partially on the metadata of the subset of the plurality of the expression properties. The grouping expression property may include cumulative metadata associated with the metadata of the subset of the plurality of expression properties.

公开(公告)号：US20230115726A1

公开(公告)日：2023-04-13

申请号：US18048560

申请日：2022-10-21

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Thierry Cruanes ,  Subramanian Muralidhar ,  Nicola Dan Onose ,  Ryan Michael Thomas Shelly ,  Brian Smith ,  Jaeyun Noh

IPC: G06F21/62 ,  H04L9/40 ,  G06F16/245 ,  H04L9/32 ,  G06F16/248

Abstract: Techniques described herein can allow users to share cached results of an original query with other users while protecting sensitive information. The techniques described herein can check whether the other users have access to the underlying data queried before allowing those users to see the stored query results. That is, the system may perform privilege checks on the shared users before giving them access to the stored query results but without having to re-run the original query.

公开(公告)号：US11270020B1

公开(公告)日：2022-03-08

申请号：US17487716

申请日：2021-09-28

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Thierry Cruanes ,  Subramanian Muralidhar ,  Nicola Dan Onose ,  Ryan Michael Thomas Shelly ,  Brian Smith ,  Jaeyun Noh

IPC: H04L29/06 ,  G06F21/62 ,  G06F16/248 ,  H04L9/32 ,  G06F16/245

Abstract: Techniques described herein can allow users to share cached results of an original query with other users while protecting sensitive information. The techniques described herein can check whether the other users have access to the underlying data queried before allowing those users to see the stored query results. That is, the system may perform privilege checks on the shared users before giving them access to the stored query results but without having to re-run the original query.