公开(公告)号：US20230185823A1

公开(公告)日：2023-06-15

申请号：US18060441

申请日：2022-11-30

Applicant: Snowflake Inc.

Inventor： Pui Kei Johnston Chu ,  Benoit Dageville ,  Shreyas Narendra Desai ,  Khondokar Sami Iqram ,  Subramanian Muralidhar ,  Chieh-Sheng Wang ,  Di Wu

IPC: G06F16/27 ,  H04L9/40

CPC classification number: G06F16/27 ,  H04L63/0272

Abstract: A network device communication system can configure network devices, such as a first database in a multi-tenant deployment and a second database in a private deployment, to send and receive sequence messages, such as replication data, over a channel comprising a plurality of private network nodes. The first database can create a link specifying the data share and the second database. The second database selects the link and a secure area in the private deployment is created into which data is replicated and shared with further accounts in a computationally secure and efficient manner.

公开(公告)号：US11640412B2

公开(公告)日：2023-05-02

申请号：US17804753

申请日：2022-05-31

Applicant: Snowflake Inc.

Inventor： Pui Kei Johnston Chu ,  Shreyas Narendra Desai ,  German Alberto Gil Echeverri ,  Prasanna Krishnan ,  Nithin Mahesh ,  Subramanian Muralidhar ,  Eric Robinson ,  Sahaj Saini

IPC: G06F16/00 ,  G06F16/27 ,  G06F16/23 ,  G06F16/22 ,  G06Q30/018 ,  G06Q30/0204

Abstract: A system for sub-table replication within a materialized view of a source data table. A materialized view of a source data table is generated based on a query, the source data table having a plurality of data table rows associated with a plurality of client identifiers and including an entitlements column and data content, the entitlements column including a plurality of provider account identifiers and a plurality of consumer account identifiers. An update to an entitlements table of the source data table is detected where the entitlements table includes a plurality of entitlements table rows and where the entitlements table rows are associated with the client identifiers, the consumer account identifiers, and the provider account identifiers. An update to the source data table based on the first update to the entitlements table is detected, and an incremental replication of the materialized view of the source data table is performed.

公开(公告)号：US11593354B2

公开(公告)日：2023-02-28

申请号：US16945546

申请日：2020-07-31

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Thierry Cruanes ,  Istvan Cseri ,  Benoit Dageville ,  Zheng Mi ,  Subramanian Muralidhar

IPC: G06F16/23 ,  G06F16/9535 ,  G06F16/27 ,  G06Q30/00 ,  G06Q30/01

Abstract: A database platform authenticates a system user for access via an application to a database that is associated with a customer account of the database platform. The system user is a first object in a first account-level namespace of the customer account, and the first account-level namespace is distinct from a default account-level namespace of the customer account. The database platform sends, as the system user, a query to the database via the application. The database platform receives, as the system user, results of the query from the database, and stores, as the system user, the results of the query in a first-namespace stage, which is a second object in the first account-level namespace.

公开(公告)号：US20230032281A1

公开(公告)日：2023-02-02

申请号：US17659797

申请日：2022-04-19

Applicant: Snowflake Inc.

Inventor： Raja Suresh Krishna Balakrishnan ,  Khalid Zaman Bijon ,  Subramanian Muralidhar ,  David Schultz ,  Jian Xu

IPC: G06F16/242 ,  G06F16/23 ,  G06F16/22 ,  G06F16/21 ,  G06F16/2453

Abstract: Aspects of the present disclosure address systems, methods, and devices for tracking object dependencies in a cloud database system. An object dependency created between a referencing object and a referenced object is detected. Based on detecting the object dependency, a dependency record is generated. The dependency record includes dependency information describing the object dependency between the reference object and the referenced object. The dependency record is stored in a database of dependency records.

公开(公告)号：US11366920B1

公开(公告)日：2022-06-21

申请号：US17464538

申请日：2021-09-01

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Pui Kei Johnston Chu ,  Benoit Dageville ,  Shreyas Narendra Desai ,  Subramanian Muralidhar ,  Bowen Zhang

IPC: G06F21/62 ,  G06F16/25 ,  G06F16/21

Abstract: Embodiments of the present disclosure provide systems and methods for defining database roles to allow sharing of the objects within a database in a more granular fashion. A database role is created within a database, and privileges are granted to the database role by a provider account. The database role may be granted to a share object, which would result in the share object being indirectly granted all privileges that have been granted to the database role. Once the share object has been hydrated in the consumer account, the local administrator can then decide which local roles are granted usage on the shared database role, thus ultimately allowing some level of filtering as to which shared objects can be accessed by which local roles.

公开(公告)号：US11354316B2

公开(公告)日：2022-06-07

申请号：US17561222

申请日：2021-12-23

Applicant: Snowflake Inc.

Inventor： Subramanian Muralidhar ,  Benoit Dageville ,  Thierry Cruanes ,  Nileema Shingte ,  Saurin Shah ,  Torsten Grabs ,  Istvan Cseri

IPC: G06F16/00 ,  G06F16/2455 ,  G06F16/23 ,  G06F16/22

Abstract: Disclosed herein are systems and methods for selective scanning of external partitions. In an embodiment, a database platform receives a query directed at least in part to an external table stored on an external data storage platform. The external table is partitioned into partitions corresponding to storage locations in the external data storage platform. The database platform prunes, using external-table metadata that is stored by the database platform and that maps the partitions of the external table to the storage locations in the external data storage platform, those partitions that do not potentially contain data that satisfies the query. The database platform identifies data that satisfies the query by scanning any one or more of the partitions of the external table that were not pruned, and responds to the query at least in part with the identified data that satisfies the query.

公开(公告)号：US20220138184A1

公开(公告)日：2022-05-05

申请号：US17647915

申请日：2022-01-13

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Thierry Cruanes ,  Istvan Cseri ,  Benoit Dageville ,  Zheng Mi ,  Subramanian Muralidhar

IPC: G06F16/23 ,  G06F16/9535 ,  G06F16/27 ,  G06Q30/00

Abstract: A database platform receives an object identifier from a client in association with a database session. The client is associated with a customer account of the database platform, and the database session is associated with the client. The customer account includes multiple disjoint account-level namespaces, each of which represents a distinct context for resolution of object identifiers, such that matching object identifiers in different account-level namespaces in the customer account do not collide with respect to object-identifier resolution. The database platform determines that the object identifier does not specify an account-level namespace, and responsively resolves the object identifier with reference to a current account-level namespace of the database session by identifying an object corresponding to the object identifier in the customer account.

公开(公告)号：US20220114180A1

公开(公告)日：2022-04-14

申请号：US17561222

申请日：2021-12-23

Applicant: Snowflake Inc.

Inventor： Subramanian Muralidhar ,  Benoit Dageville ,  Thierry Cruanes ,  Nileema Shingte ,  Saurin Shah ,  Torsten Grabs ,  Istvan Cseri

IPC: G06F16/2455 ,  G06F16/22 ,  G06F16/23

Abstract: Disclosed herein are systems and methods for selective scanning of external partitions. In an embodiment, a database platform receives a query directed at least in part to an external table stored on an external data storage platform. The external table is partitioned into partitions corresponding to storage locations in the external data storage platform. The database platform prunes, using external-table metadata that is stored by the database platform and that maps the partitions of the external table to the storage locations in the external data storage platform, those partitions that do not potentially contain data that satisfies the query. The database platform identifies data that satisfies the query by scanning any one or more of the partitions of the external table that were not pruned, and responds to the query at least in part with the identified data that satisfies the query.

公开(公告)号：US20220027368A1

公开(公告)日：2022-01-27

申请号：US17498382

申请日：2021-10-11

Applicant: Snowflake Inc.

Inventor： Subramanian Muralidhar ,  Benoit Dageville ,  Thierry Cruanes ,  Nileema Shingte ,  Saurin Shah ,  Torsten Grabs ,  Istvan Cseri

IPC: G06F16/2453

Abstract: Disclosed herein are systems and methods for processing queries over external tables. In an embodiment, a database platform receives a query directed at least to data in an external table stored in a storage platform that is external to the database platform. The database platform uses metadata that summarizes the data in the external table to identify one or more partitions of the external table as potentially including data satisfying the query, and generates a query plan that includes a plurality of discrete subtasks that collectively include instructions to scan the identified one or more partitions of the external table for data satisfying the query. The database platform assigns, based on the metadata, the plurality of discrete subtasks to one or more nodes in an execution platform, and refreshes the metadata in response to a threshold number of modifications being made to the external table.

公开(公告)号：US20220019570A1

公开(公告)日：2022-01-20

申请号：US17491106

申请日：2021-09-30

Applicant: Snowflake Inc.

Inventor： Subramanian Muralidhar ,  Istvan Cseri ,  Torsten Grabs ,  Benoit Dageville

IPC: G06F16/23 ,  G06F16/27 ,  G06F16/245 ,  G06F16/18

Abstract: Systems, methods, and devices for transactional processing of change tracking data for a database are discussed. A method includes generating a micro-partition based on execution of a transaction on a table of a database, the micro-partition reflecting changes made to the table by the transaction. A change tracking entry is generated in response to the execution of the transaction. The change tracking entry includes an indication of one or more modifications made to the table by the transaction and an indication of the micro-partition generated based on the execution of the transaction. The change tracking entry is stored in the micro-partition as metadata. At least one existing micro-partition is removed from the table, responsive to storing the change tracking entry.