公开(公告)号：US20200379995A1

公开(公告)日：2020-12-03

申请号：US16831000

申请日：2020-03-26

Applicant: Snowflake Inc.

Inventor： Prasanna Rajaperumal ,  Thierry Cruanes ,  Allison Waingold Lee ,  Igor Demura ,  Jiaqi Yan ,  Benoit Dageville

IPC: G06F16/2453

Abstract: Systems, methods, and devices for sharing materialized views in multiple tenant database systems. A method includes defining a materialized view over a source table that is associated with a first account of a multiple tenant database. The method includes defining cross-account access rights to the materialized view to a second account such that that second account can read the materialized view without copying the materialized view. The method includes modifying the source table for the materialized view. The method includes identifying whether the materialized view is stale with respect to the source table by merging the materialized view and the source table.

公开(公告)号：US20200379994A1

公开(公告)日：2020-12-03

申请号：US16428395

申请日：2019-05-31

Applicant: Snowflake Inc.

Inventor： Prasanna Rajaperumal ,  Thierry Cruanes ,  Allison Waingold Lee ,  Igor Demura ,  Jiaqi Yan ,  Benoit Dageville

IPC: G06F16/2453

Abstract: Systems, methods, and devices for sharing materialized views in multiple tenant database systems. A method includes defining a materialized view over a source table that is associated with a first account of a multiple tenant database. The method includes defining cross-account access rights to the materialized view to a second account such that that second account can read the materialized view without copying the materialized view. The method includes modifying the source table for the materialized view. The method includes identifying whether the materialized view is stale with respect to the source table by merging the materialized view and the source table.

公开(公告)号：US10853345B2

公开(公告)日：2020-12-01

申请号：US16716989

申请日：2019-12-17

Applicant: Snowflake Inc.

Inventor： Jiaqi Yan ,  Thierry Cruanes ,  Jeffrey Rosen ,  William Waddington ,  Prasanna Rajaperumal ,  Abdul Munir

IPC: G06F16/22 ,  G06F16/27 ,  G06F16/28 ,  G06F7/08

Abstract: Automatic clustering of a database table is disclosed. A method for automatic clustering of a database table includes receiving an indication that a data modification task has been executed on a table and determining whether the table is sufficiently clustered. The method includes, in response to determining the table is not sufficiently clustered, selecting one or more micro-partitions of the table to be reclustered. The method includes assigning each of the one or more micro-partitions to an execution node to be reclustered.

公开(公告)号：US20200327124A1

公开(公告)日：2020-10-15

申请号：US16778954

申请日：2020-01-31

Applicant: Snowflake Inc.

Inventor： Jeffrey Rosen ,  Abdul Munir ,  Jiaqi Yan ,  William Waddington ,  Prasanna Rajaperumal ,  Thierry Cruanes

IPC: G06F16/2458 ,  G06F16/2453 ,  G06F9/50 ,  G06F16/2455

Abstract: Resource provisioning systems and methods are described. In an embodiment, a system includes a plurality of shared storage devices collectively storing database data, an execution platform, and a compute service manager. The compute service manager is configured to determine a task to be executed in response to a trigger event and determine a query plan for executing the task, wherein the query plan comprises a plurality of discrete subtasks. The compute service manager is further configured to assign the plurality of discrete subtasks to one or more nodes of a plurality of nodes of the execution platform, determine whether execution of the task is complete, and in response to determining the execution of the task is complete, store a record in the plurality of shared storage devices indicating the task was completed.

公开(公告)号：US20200327123A1

公开(公告)日：2020-10-15

申请号：US16380848

申请日：2019-04-10

Applicant: Snowflake Inc.

Inventor： Jeffrey Rosen ,  Abdul Munir ,  Jiaqi Yan ,  William Waddington ,  Prasanna Rajaperumal ,  Thierry Cruanes

IPC: G06F16/2458 ,  G06F16/2453 ,  G06F16/2455 ,  G06F9/50

Abstract: Resource provisioning systems and methods are described. In an embodiment, a system includes a plurality of shared storage devices collectively storing database data, an execution platform, and a compute service manager. The compute service manager is configured to determine a task to be executed in response to a trigger event and determine a query plan for executing the task, wherein the query plan comprises a plurality of discrete subtasks. The compute service manager is further configured to assign the plurality of discrete subtasks to one or more nodes of a plurality of nodes of the execution platform, determine whether execution of the task is complete, and in response to determining the execution of the task is complete, store a record in the plurality of shared storage devices indicating the task was completed.

公开(公告)号：US12277116B2

公开(公告)日：2025-04-15

申请号：US18128143

申请日：2023-03-29

Applicant: Snowflake Inc.

Inventor： Prashant Gaharwar ,  Vineet Garg ,  Nicola Dan Onose ,  Jiaqi Yan

IPC: G06F16/2453

Abstract: The subject technology receives a query. The subject technology performs a lookup operation on a shadow cache. The subject technology performs a validation process on the particular query plan for determining a cache hit on the shadow cache. The subject technology performs a program building process to update the particular query plan with additional information for executing the particular query plan. The subject technology performs a compilation process to compile an updated program of the updated particular query plan. The subject technology determines that the updated particular query plan is cacheable based at least in part on the compilation process. The subject technology registers the updated particular query plan as a new entry in the shadow cache. The subject technology sends the updated program to an execution node for executing the updated particular query plan.

公开(公告)号：US20250110718A1

公开(公告)日：2025-04-03

申请号：US18479589

申请日：2023-10-02

Applicant: Snowflake Inc.

Inventor： Jin Mo Ahn ,  Vlad Bunescu ,  Lin Chan ,  Ryan Druckman ,  Adrian Hamza ,  Alexander Hess ,  Gabriel Kliot ,  Albert Nathan McNamara ,  Subramanian Muralidhar ,  Jiaqi Yan

IPC: G06F8/60 ,  G06F11/34

Abstract: A system and method of isolated testing platform for cloud database production queries. The method includes providing an execution platform including a production deployment to receive a first group of queries from a first group of user devices. The production deployment includes a local data storage to store a first dataset associated with the first group of user devices and an execution node to process the first group of queries based on a first version of an application and based on the user data. The method includes receiving a request to test a second version of the application based on the first version of the application. The method includes deploying a ghost deployment onto the execution platform. The method includes replaying the first group of queries on the ghost deployment using copies of the first version of the application and the second version of the application.

公开(公告)号：US20250094418A1

公开(公告)日：2025-03-20

申请号：US18525811

申请日：2023-11-30

Applicant: Snowflake Inc.

Inventor： Srilakshmi Chintala ,  Jianzhun Du ,  Naresh Kumar ,  Jaeyun Noh ,  Srinath Shankar ,  Leonhard Franz Spiegelberg ,  Eric Shawn Vandenberg ,  Jiaqi Yan ,  Andong Zhan ,  Yun Zou

IPC: G06F16/2453

Abstract: Examples provide a method for performing dynamic pivot queries employing PANDA-compatible semantics inside a cloud data platform workload. A SQL engine receives a pivot query specifying a pivot column for dynamically determining pivot values in a dynamic pivot operation. The SQL engine identifies, in the pivot query, a keyword or a subquery indicating dynamic determination of the pivot values. Based on identifying the keyword or the subquery indicating the dynamic determination of the pivot values, the SQL engine determines distinct pivot values for the pivot column by evaluating the keyword or executing the subquery. The evaluating of the keyword includes issuing a query to a data store to obtain the distinct pivot values for the pivot column. The SQL engine performs the dynamic pivot operation using the distinct pivot values for the pivot column.

公开(公告)号：US20240338367A1

公开(公告)日：2024-10-10

申请号：US18746644

申请日：2024-06-18

Applicant: Snowflake Inc.

Inventor： Thierry Cruanes ,  Sangyong Hwang ,  Nitish Jindal ,  Jiaqi Yan ,  Yongsik Yoon

IPC: G06F16/2453

CPC classification number: G06F16/24544 ,  G06F16/24537

Abstract: Techniques for join elimination are described herein. Join elimination can identify and eliminate unnecessary joins in a query plan node. For example, join elimination can involve a semantic query optimization technique, which removes reference to a table whose columns are only referenced in join predicates if the joins do not filter/expand rows in the result. Such joins can cause significant performance issues on larger datasets if not optimized.

公开(公告)号：US12106149B2

公开(公告)日：2024-10-01

申请号：US18140086

申请日：2023-04-27

Applicant: Snowflake Inc.

Inventor： Thierry Cruanes ,  Igor Demura ,  Varun Ganesh ,  Prasanna Rajaperumal ,  Libo Wang ,  Jiaqi Yan

IPC: G06F9/46 ,  G06F9/50 ,  G06F9/54 ,  H04L67/1001

CPC classification number: G06F9/5027 ,  G06F9/5077 ,  G06F9/5083 ,  G06F9/542 ,  H04L67/1001 ,  G06F2209/5011

Abstract: Embodiments of the present disclosure may provide dynamic and fair assignment techniques for allocating resources on a demand basis. Assignment control may be separated into at least two components: a local component and a global component. Each component may have an active dialog with each other; the dialog may include two aspects: 1) a demand for computing resources, and 2) a total allowed number of computing resources. The global component may allocate resources from a pool of resources to different local components, and the local components in turn may assign their allocated resources to local competing requests. The allocation may also be throttled or limited at various levels.