公开(公告)号：US11036881B2

公开(公告)日：2021-06-15

申请号：US16241463

申请日：2019-01-07

Applicant: Snowflake Inc.

Inventor： Allison Waingold Lee ,  Peter Povinec ,  Martin Hentschel ,  Robert Muglia

IPC: G06F21/62 ,  G06F21/78 ,  G06F16/245 ,  G06F16/22 ,  G06F21/60

Abstract: Systems, methods, and devices for implementing secure views for zero-copy data sharing in a multi-tenant database system are disclosed. A method includes generating a share object in a first account comprising a share role. The method includes associating view privileges for the share object such that an underlying detail of the share object comprises a secure user-defined function definition. The method includes granting, to a second account, cross-account access rights to the share role or share object in the first account. The method includes receiving a request from the second account to access data or services of the first account and providing a response to the second account based on the data or services of the first account. The method is such that the underlying detail of the share object that comprises the secure user-defined function definition is hidden from the second account and visible to the first account.

公开(公告)号：US10999261B1

公开(公告)日：2021-05-04

申请号：US17086261

申请日：2020-10-30

Applicant: Snowflake Inc.

Inventor： Damien Carru ,  Robert Bengt Benedikt Gernhardt ,  Martin Hentschel ,  Nithin Mahesh ,  Eric Robinson

IPC: H04L29/06 ,  H04L9/30 ,  G06F16/27

Abstract: A networked device communication system can configure network devices (e.g., a primary and secondary database) to send and receive sequences of messages, such as replicated data, using one or more keypairs and wrapping keys. The sequences of messages can include an initial set of messages that are encrypted by a wrapping key, and further include another set of messages that are encrypted by a replaced staggered key. The sequence of messages can be configured to be decrypted without exporting keys of hardware security modules.

公开(公告)号：US10997157B2

公开(公告)日：2021-05-04

申请号：US16944153

申请日：2020-07-31

Applicant: Snowflake Inc.

Inventor： Benoit Dageville ,  Martin Hentschel ,  William Waddington

IPC: G06F16/00 ,  G06F16/23 ,  G06F21/60 ,  G06F16/22 ,  G06F16/2455

Abstract: The subject technology stores table metadata for a current version of a table in a current-version set of one or more table-metadata files. The subject technology detects a modification to the current version of the table, the modification resulting in a new version of the table, the new version of the table being stored in a new-version set of one or more table-data files, the new-version set of one or more table-data files being different than a current-version set of one or more table-data files. The subject technology, responsive to detecting the modification to the current version of the table, generates and storing a new-version set of one or more table-metadata files, the new-version set of one or more table-metadata files comprising table metadata for the new version of the table

公开(公告)号：US20210103589A1

公开(公告)日：2021-04-08

申请号：US17123551

申请日：2020-12-16

Applicant: Snowflake Inc.

Inventor： Benoit Dageville ,  Yi Fang ,  Martin Hentschel ,  Ashish Motivala ,  Spyros Triantafyllis ,  Yizhi Zhu

IPC: G06F16/2455 ,  G06F16/23 ,  G06F16/2457 ,  G06F16/22 ,  G06F16/2458 ,  G06F16/27

Abstract: The subject technology receives first metadata corresponding to a set of micro-partitions. The subject technology stores a first data structure and a second data structure in storage as a first file and a second file, first data structure including the first metadata and a second data structure including second metadata, the first metadata corresponding to a set of micro-partitions, the second metadata for a grouping of the first metadata, the second data structure including information associating the second metadata to the first metadata. The subject technology stores third metadata for a table, the third metadata comprising information about data stored in a micro-partition of the table.

公开(公告)号：US20210019334A1

公开(公告)日：2021-01-21

申请号：US17062859

申请日：2020-10-05

Applicant: Snowflake Inc.

Inventor： Ashish Motivala ,  Yi Fang ,  Martin Hentschel ,  Benoit Dageville ,  Spyros Triantafyllis ,  Yizhi Zhu

IPC: G06F16/27 ,  G06F16/245 ,  G06F16/22

Abstract: The subject technology stores database data in a table, the table comprising a plurality of micro-partitions each having rows and columns. The subject technology stores metadata for the table in a data structure, the metadata comprising a first level of the data structure comprising a column expression property comprising information about data stored in a column of a micro-partition of the table, a micro-partition expression property comprising information about data stored in the micro-partition of the table, and a second level of the data structure comprising a grouping expression property comprising information about data stored in the micro-partition and one or more additional micro-partitions of the table.

公开(公告)号：US20200327115A1

公开(公告)日：2020-10-15

申请号：US16915435

申请日：2020-06-29

Applicant: Snowflake Inc.

Inventor： Benoit Dageville ,  Martin Hentschel ,  William Waddington

IPC: G06F16/23 ,  G06F21/60 ,  G06F16/22 ,  G06F16/2455

Abstract: A method for a database system includes storing table data for a database, the table data including information in rows and columns of one or more database tables. The method includes storing metadata on immutable storage, the metadata including information about the table data for the database. In one embodiment, mutable metadata may be periodically consolidated in the background to create new versions of metadata files and which allows for deletions of old metadata files and old data files.

公开(公告)号：US20200272638A1

公开(公告)日：2020-08-27

申请号：US16775092

申请日：2020-01-28

Applicant: Snowflake Inc

Inventor： Ashish Motivala ,  Yi Fang ,  Martin Hentschel ,  Benoit Dageville ,  Spyros Triantafylis ,  Yizhi Zhu

IPC: G06F16/27 ,  G06F16/22 ,  G06F16/245

Abstract: Systems, methods, and devices for multiple level metadata organization in database systems. A system includes a plurality of shared storage devices collectively storing database data across a plurality of tables that each comprise one or more micro-partitions including immutable storage devices. The system includes a resource manager configured to manage the storage of database data stored in a table across one or more of the plurality of shared storage devices. The resource manager is configured to manage the storage of metadata for the table. The metadata includes a column expression property with information about data stored in a column, a micro-partition expression property with information about data stored in a micro-partition, a grouping expression property with information about data stored in two or more micro-partitions, and cumulative table metadata with global information about all micro-partitions of the table.

公开(公告)号：US20200272628A1

公开(公告)日：2020-08-27

申请号：US16863831

申请日：2020-04-30

Applicant: Snowflake Inc.

Inventor： Benoit Dageville ,  Yi Fang ,  Martin Hentschel ,  Ashish Motivala ,  Spyridon Triantafyllis ,  Yizhi Zhu

IPC: G06F16/2455 ,  G06F16/23

Abstract: The subject technology receives first metadata corresponding to a set of micro-partitions. The subject technology generates second metadata for a grouping of the first metadata. The subject technology generates a first data structure including the first metadata and a second data structure including the second metadata, the second data structure including information associating the second metadata to the first metadata. The subject technology stores the first data structure and the second data structure in persistent storage as a first file and a second file. The subject technology receives a query on a table. Further, the subject technology analyzes the query against cumulative table metadata to determine whether data stored in the table matches the query.

公开(公告)号：US20200226281A1

公开(公告)日：2020-07-16

申请号：US16836521

申请日：2020-03-31

Applicant: Snowflake Inc.

Inventor： Martin Hentschel ,  Allison Waingold Lee ,  Robert Muglia ,  Peter Povinec

IPC: G06F21/62 ,  G06F16/245 ,  G06F16/22

Abstract: Systems, methods, and devices for implementing secure views for zero-copy data sharing in a multi-tenant database system are disclosed. A method includes generating a share object in a first account comprising a share role. The method includes associating view privileges for the share object such that an underlying detail of the share object comprises a secure view definition. The method includes granting, to a second account, cross-account access rights to the share role or share object in the first account. The method includes receiving a request from the second account to access data or services of the first account and providing a response to the second account based on the data or services of the first account. The method is such that the underlying detail of the share object that comprises the secure view definition is hidden from the second account and visible to the first account.

公开(公告)号：US10642993B1

公开(公告)日：2020-05-05

申请号：US16779103

申请日：2020-01-31

Applicant: Snowflake Inc.

Inventor： Benoit Dageville ,  Thierry Cruanes ,  Martin Hentschel ,  Peter Povinec

IPC: G06F21/62 ,  G06F16/25

Abstract: A method for sharing data in a multi-tenant database includes generating a share object in a first account comprising a share role. The method includes associating one or more access rights with the share role, wherein the one or more access rights indicate which objects in the first account are accessible based on the share object. The method includes granting, to a second account, cross-account access rights to the share role or share object in the first account. The method includes receiving a request from the second account to access data or services of the first account. The method further includes providing a response to the second account based on the data or services of the first account.