Data sharing in database systems

Patent metadata

Field	Value
Publication number	US-10997169-B2
Application number	US-202017125453-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	May 31, 2019
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Using one or more processors, generating a materialized view over a share object, the share object, including data associated with a first account. Using the one or more processors, merging the materialized view and the share object. Using the one or more processors, updating the data associated with the first account subsequent to generating the materialized view. Using the one or more processors, generating a refreshed materialized view with respect to the share object in response to detecting the updated data. Using the one or more processors, sharing the refreshed materialized view to a second account in response to a request from the second account.

First claim

What is claimed is:

1. A method comprising:
generating, using one or more processors, a materialized view over a share object, the share object including data associated with a first account;
merging, using the one or more processors, the materialized view and the share object;
updating, using the one or more processors, the data associated with the first account subsequent to generating the materialized view;
generating, using the one or more processors, a refreshed materialized view with respect to the share object in response to detecting the updated data; and
sharing, using the one or more processors, the refreshed materialized view to a second account in response to a request from the second account.

2. The method of claim 1 , further comprising:
determining that the materialized view is stale with respect to the share object based at least in part on the merging.

3. The method of claim 2 , further comprising:
receiving a request from the second account to generate a second materialized view over particular data associated with the first account;
determining that the particular data is included in the share object; and
granting, to the second account, authorization to generate the second materialized view based on the particular data.

4. The method of claim 1 , wherein determining that the materialized view is stale further comprises:
identifying that the data in the share object has been modified since a previous refresh of the materialized view.

5. The method of claim 1 , further comprising:
granting cross-account access rights to the share object to the second account such that the second account has access to the share object without copying the share object.

6. The method of claim 5 , wherein the granted cross-account access rights are based on a first role associated with the first account, and the granted cross-account access rights are assigned to a second role associated with the second account.

7. The method of claim 6 , wherein the first role has a select grant to data in a first table, the second role has a usage grant of the first role, and the second role is allowed to access data in the first account based at least in part on the usage grant, wherein the usage grant allows the second role to inherit access privileges of the first role.

8. The method of claim 7 , further comprising:
executing, by a user with the second role, a database query on the first table.

9. The method of claim 5 , further comprising:
defining view privileges for the cross-account access rights to the share object such that an underlying detail of the share object comprises a secure view definition, wherein the underlying detail of the share object comprises:
a data field in the share object,
a column of data in the share object, or
a quantity of data in the share object.

10. The method of claim 9 , wherein defining the view privileges for the cross-account access rights to the share object comprises hiding the view privileges from the second account and making the view privileges visible to the first account.

11. A system comprising:
at least one processor; and
a memory device including instructions, which when executed by the at least one processor, cause the at least one processor to perform operations comprising:
generating, using one or more processors, a materialized view over a share object, the share object including data associated with a first account;
merging, using the one or more processors, the materialized view and the share object;
updating, using the one or more processors, the data associated with the first account subsequent to generating the materialized view;
generating, using the one or more processors, a refreshed materialized view with respect to the share object in response to detecting the updated data; and
sharing, using the one or more processors, the refreshed materialized view to a second account in response to a request from the second account.

12. The system of claim 11 , wherein the operations further comprise:
determining that the materialized view is stale with respect to the share object based at least in part on the merging.

13. The system of claim 12 , wherein the operations further comprise:
receiving a request from the second account to generate a second materialized view over particular data associated with the first account;
determining that the particular data is included in the share object; and
granting, to the second account, authorization to generate the second materialized view based on the particular data.

14. The system of claim 11 , wherein determining that the materialized view is stale further comprises:
identifying that the data in the share object has been modified since a previous refresh of the materialized view.

15. The system of claim 11 , wherein the operations further comprise:
granting cross-account access rights to the share object to the second account such that the second account has access to the share object without copying the share object.

16. The system of claim 15 , wherein the granted cross-account access rights are based on a first role associated with the first account, and the granted cross-account access rights are assigned to a second role associated with the second account.

17. The system of claim 16 , wherein the first role has a select grant to data in a first table, the second role has a usage grant of the first role, and the second role is allowed to access data in the first account based at least in part on the usage grant, wherein the usage grant allows the second role to inherit access privileges of the first role.

18. The system of claim 17 , wherein the operations further comprise:
executing, by a user with the second role, a database query on the first table.

19. The system of claim 15 , wherein the operations further comprise:
defining view privileges for the cross-account access rights to the share object such that an underlying detail of the share object comprises a secure view definition, wherein the underlying detail of the share object comprises:
a data field in the share object,
a column of data in the share object, or
a quantity of data in the share object.

20. The system of claim 19 , wherein defining the view privileges for the cross-account access rights to the share object comprises hiding the view privileges from the second account and making the view privileges visible to the first account.

21. A non-transitory computer-readable medium comprising instructions, which when executed by at least one processor, cause the at least one processor to perform operations comprising:
generating, using one or more processors, a materialized view over a share object, the share object including data associated with a first account;
merging, using the one or more processors, the materialized view and the share object;
updating, using the one or more processors, the data associated with the first account subsequent to generating the materialized view;
generating, using the one or more processors, a refreshed materialized view with respect to the share object in response to detecting the updated data; and
sharing, using the one or more processors, the refreshed materialized view to a second account in response to a request from the second account.

22. The non-transitory computer-readable medium of claim 21 , wherein the operations further comprise:
determining that the materialized view is stale with respect to the share object based at l

Assignees

• Snowflake Inc

Inventors

• Rajaperumal Prasanna
• Cruanes Thierry
• Lee Allison Waingold
• Demura Igor
• Yan Jiaqi
• Dageville Benoit

Classifications

• G06F16/278

  Data partitioning, e.g. horizontal or vertical partitioning · CPC title

• G06F16/256

  in federated or virtual databases · CPC title

• G06F16/24552

  Database cache management · CPC title

• G06F16/24539 Primary

  using cached or materialised query results · CPC title

• G06F16/2393 Primary

  Updating materialised views · CPC title