公开(公告)号：US20220197912A1

公开(公告)日：2022-06-23

申请号：US17689463

申请日：2022-03-08

Applicant: Snowflake Inc.

Inventor： Artin Avanes ,  Khalid Zaman Bijon ,  Yujie Li ,  Zheng Mi ,  Subramanian Muralidhar ,  David Schultz

IPC: G06F16/2457 ,  G06F16/27 ,  G06F16/28 ,  G06F16/21 ,  G06F16/23

Abstract: A method of implementing object tagging framework starts with the processor receiving a tag creation command including a tag name. In response to the tag creation command, the processor creates a current tag. The processor then receives an association command, the tag name and a source object identifier. The processor determines a source object associated with the source object identifier. The source object includes a tag value. The processor associates the current tag with the source object. The processor receives a replication command including the source object and a target object. The processor causes replication of the source object to the target object that comprises replicating the current tag with the tag name and the tag value in the source object to the target object. Other embodiments are also described herein.

公开(公告)号：US20220138206A1

公开(公告)日：2022-05-05

申请号：US17102156

申请日：2020-11-23

Applicant: Snowflake Inc.

Inventor： Artin Avanes ,  Khalid Zaman Bijon ,  Yujie Li ,  Zheng Mi ,  Subramanian Muralidhar ,  David Schultz

IPC: G06F16/2457 ,  G06F16/28 ,  G06F16/22 ,  G06F16/21

Abstract: A method of implementing object tagging framework starts with the processor receiving a tag creation command including a tag name. In response to the tag creation command, the processor creates a current tag. The processor then receives an association command, the tag name and a target object identifier. The processor determines a target object associated with the target object identifier. The target object includes a tag value. The processor associates the current tag with the target object. The processor identifies a first child object of the target object. The target object and the first child object are hierarchical objects. In response to determining that the first child object is tag-unassociated, the processor associates the current tag with the first child object. In response to receiving a query including the tag name, the processor generates an output based on the tag name. Other embodiments are also described herein.

公开(公告)号：US11294882B2

公开(公告)日：2022-04-05

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 ,  G06F16/245 ,  G06F16/27 ,  G06F9/46 ,  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.

公开(公告)号：US11249988B2

公开(公告)日：2022-02-15

申请号：US16945344

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 ,  G06F16/27 ,  G06F16/9535 ,  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. In response to receiving the object identifier, the database platform identifies a resolution namespace for the object identifier, where the resolution namespace for the object identifier is a namespace that is specified in the object identifier if the object identifier includes a specified namespace, and where the resolution namespace is otherwise a current account-level namespace of the database session. The database platform resolves the object identifier with reference to the identified resolution namespace for the object identifier, including identifying an object corresponding to the object identifier in the customer account.

公开(公告)号：US20210390095A1

公开(公告)日：2021-12-16

申请号：US17462435

申请日：2021-08-31

Applicant: Snowflake Inc.

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

IPC: G06F16/23 ,  G06F16/248 ,  G06F16/2458 ,  G06F3/06 ,  G06F16/25

Abstract: The subject technology receives a notification that a modification has been made to an external table, the modification comprising inserting at least one row of new data to the external table, the at least one row corresponding to a first micro-partition that includes a first portion of data from the external table prior to the inserting. The subject technology, in response to the notification indicating the modification to the external table, generates a new micro-partition different from the first micro-partition, the new micro-partition including the inserted at least one row of new data and the first portion of data from the external table. The subject technology generates a refreshed materialized view based at least in part on the generated new micro-partition such that the refreshed materialized view comprises a representation of the external table after the modification has been made.

公开(公告)号：US11163797B1

公开(公告)日：2021-11-02

申请号：US17302396

申请日：2021-04-30

Applicant: Snowflake Inc.

Inventor： Pui Kei Johnston Chu ,  Benoit Dageville ,  Shreyas Narendra Desai ,  Sameer Deshpande ,  Subramanian Muralidhar ,  Di Wu

IPC: G06F16/27

Abstract: Disclosed herein are systems and methods for database replication to a remote deployment with automated fulfillment. In an embodiment, a data platform provisions a remote-deployment account of a data provider at a remote deployment of the data platform with a set of one or more replication-preparation objects associated with a primary-deployment database that is resident in a primary-deployment account of the data provider at a primary deployment of the data platform. After the provisioning, the data platform detects receipt of a database-replication request associated with a data consumer, requesting availability of a local instance of the primary-deployment database in the remote-deployment account of the data provider. The data platform responsively performs one or more remote-deployment-activation operations, which makes available to the data consumer a local instance of the primary-deployment database in the remote-deployment account of the data provider at the remote deployment of the data platform.

公开(公告)号：US11163757B2

公开(公告)日：2021-11-02

申请号：US17200751

申请日：2021-03-12

Applicant: Snowflake Inc.

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

IPC: G06F3/06 ,  G06F16/2453 ,  G06F16/25 ,  G06F16/23 ,  G06F16/242

Abstract: Systems, methods, and devices for querying over an external table are disclosed. A method includes connecting a database platform to an external table such that the database platform has read access for the external table and does not have write access for the external table. The method includes receiving a query comprising a predicate, the query directed at least to data in the external table. The method includes determining, based on metadata, one or more partitions in the external table comprising data satisfying the predicate. The method includes pruning, based on the metadata, all partitions in the external table that do not comprise any data satisfying the predicate. The method includes generating a query plan comprising a plurality of discrete subtasks. The method includes assigning, based on the metadata, the plurality of discrete subtasks to one or more nodes in an execution platform.

公开(公告)号：US20210326324A1

公开(公告)日：2021-10-21

申请号：US17364562

申请日：2021-06-30

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 generating a transactional change tracking summary for a database. A method includes executing a transaction on a table of a database, wherein the table includes a micro-partition and the transaction is executed on the micro-partition. The method includes, in response to the transaction being fully executed, generating a change tracking entry comprising an indication of one or modifications made to the table by the transaction. The method includes storing the change tracking entry in a change tracking stream, wherein the change tracking stream includes one or more sequential change tracking entries that each correspond to a different transaction that is fully executed on the table.

公开(公告)号：US11080257B2

公开(公告)日：2021-08-03

申请号：US16410695

申请日：2019-05-13

Applicant: Snowflake Inc.

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

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

Abstract: Systems, methods, and devices for storing database data in journal tables comprising a snapshot and a log table. A method includes defining a journal table comprising a snapshot and a log table, the snapshot comprising an up-to-date representation of data in the journal table at a point in time. The method includes assigning a timestamp to the snapshot indicating when the snapshot was generated. The method includes receiving a request to execute a transaction on the journal table to modify the data in the journal table, the transaction comprising one or more of an insert, a delete, an update, or a merge. The method includes inserting a new row into the log table in lieu of executing the transaction on the snapshot of the journal table, the new row comprising an indication of a change requested to be made to the journal table based on the transaction.

公开(公告)号：US11055430B2

公开(公告)日：2021-07-06

申请号：US17086269

申请日：2020-10-30

Applicant: Snowflake Inc.

Inventor： Artin Avanes ,  Khalid Zaman Bijon ,  Damien Carru ,  Thierry Cruanes ,  Vikas Jain ,  Zheng Mi ,  Subramanian Muralidhar

IPC: G06F21/62 ,  G06F16/27 ,  G06F16/25 ,  G06F16/22 ,  G06F16/248

Abstract: A shared database platform implements dynamic masking on data shared between users where specific data is masked, transformed, or otherwise modified based on preconfigured functions that are associated with user roles. The shared database platform can implement the masking at runtime dynamically in response to users requesting access to a database object that is associated with one or more masking policies.