Mechanisms for handling schema changes

    公开(公告)号:US11940963B2

    公开(公告)日:2024-03-26

    申请号:US17457244

    申请日:2021-12-01

    CPC classification number: G06F16/213 G06F16/2282 G06F16/2358 G06F16/24552

    Abstract: Techniques are disclosed relating to database schemas. A computer system may receive a metadata document that describes an updated schema for a database that stores a plurality of records. The computer system may instantiate a set of processes to perform an upgrade routine to upgrade ones of the plurality of records to comply with the updated schema. While the set of processes are upgrading the records, the computer system may receive a request to perform an operation on one of the plurality of records. The computer system may detect that the record corresponds to an earlier schema version than a version of the updated schema of the metadata document and may upgrade the record to comply with that updated schema. After upgrading the record, the computer system may perform the requested operation on the record.

    Caching techniques for a database change stream

    公开(公告)号:US11650985B2

    公开(公告)日:2023-05-16

    申请号:US17446197

    申请日:2021-08-27

    CPC classification number: G06F16/24552 G06F16/2282 G06F16/2358 G06F16/24568

    Abstract: Techniques are disclosed relating to caching techniques for processing a database change stream. A computer system may receive change records from a change stream that includes a plurality of records indicating changes to a database table. The change stream may include change records for multiple shards and be accessible by providing one or more position indicators for one or more of the multiple shards to request one or more change records and an updated position indicator. The system may store, for changes to a set of one or more shards, one or more cache entries that include respective groups of change records. The system may request a portion of the change stream by providing a received position indicator. The system may provide one or more cached change records from a cache entry that matches the provided position indicator.

    Data templates associated with non-relational database systems

    公开(公告)号:US11157466B2

    公开(公告)日:2021-10-26

    申请号:US16121598

    申请日:2018-09-04

    Abstract: In various embodiments, a computer system implements a service that stores a plurality of database templates that define data types supported for a non-relational database accessible to a plurality of applications. The service receives, from a developer of an application, a selection of one of the plurality of database templates to be used by the application. In response to the selection, the service issues a set of data definition language (DDL) instructions to provision the non-relational database with a schema that implements a particular data type defined by the selected template. Requests from the application to manipulate a value of the particular data type stored in the non-relational database system are serviced. In some embodiments, the servicing includes identifying a set of data manipulation language (DML) instructions to be executed and issuing the set of DML, instructions to the non-relational database.

    TECHNIQUES FOR HANDLING MESSAGE QUEUES
    4.
    发明申请

    公开(公告)号:US20200322288A1

    公开(公告)日:2020-10-08

    申请号:US16834955

    申请日:2020-03-30

    Abstract: Techniques are disclosed relating to handling queues. A server-based platform, in some embodiments, accesses queue information that includes performance attributes for a plurality of queues storing one or more messages corresponding to one or more applications. In some embodiments, the platform assigns, based on the performance attributes, a corresponding set of the plurality of queues to each of a plurality of processing nodes of the platform. In some embodiments, the assigning of a corresponding set of queues to a given one of the plurality of processing nodes causes instantiation of: a first set of one or more dequeuing threads and a second set of one or more processing threads. The dequeuing threads may be executable to dequeue one or more messages stored in the corresponding set of queues. The processing threads may be executable to perform one or more tasks specified in the dequeued one or more messages.

    DATA TEMPLATES ASSOCIATED WITH NON-RELATIONAL DATABASE SYSTEMS

    公开(公告)号:US20200073972A1

    公开(公告)日:2020-03-05

    申请号:US16121598

    申请日:2018-09-04

    Abstract: Techniques are disclosed relating to non-relational databases. In various embodiments, a computer system implements a service that stores a plurality of database templates that define data types supported for a non-relational database accessible to a plurality of applications. The service receives, from a developer of an application, a selection of one of the plurality of database templates to be used by the application. In response to the selection, the service issues a set of data definition language (DDL) instructions to provision the non-relational database with a schema that implements a particular data type defined by the selected template. Requests from the application to manipulate a value of the particular data type stored in the non-relational database system are serviced. In some embodiments, the servicing includes identifying a set of data manipulation language (DML) instructions to be executed and issuing the set of DML instructions to the non-relational database.

    TECHNIQUES FOR HANDLING MESSAGE QUEUES

    公开(公告)号:US20210226903A1

    公开(公告)日:2021-07-22

    申请号:US17162698

    申请日:2021-01-29

    Abstract: Techniques are disclosed relating to handling queues. A server-based platform, in some embodiments, accesses queue information that includes performance attributes for a plurality of queues storing one or more messages corresponding to one or more applications. In some embodiments, the platform assigns, based on the performance attributes, a corresponding set of the plurality of queues to each of a plurality of processing nodes of the platform. In some embodiments, the assigning of a corresponding set of queues to a given one of the plurality of processing nodes causes instantiation of: a first set of one or more dequeuing threads and a second set of one or more processing threads. The dequeuing threads may be executable to dequeue one or more messages stored in the corresponding set of queues. The processing threads may be executable to perform one or more tasks specified in the dequeued one or more messages.

    Multi-tenant tables of a distributed database

    公开(公告)号:US10719533B2

    公开(公告)日:2020-07-21

    申请号:US15861470

    申请日:2018-01-03

    Abstract: A system may store data in a shared table of a distributed database based on generating a tenant-specific partition key. The system may receive a message from a first tenant that indicates certain data to be written to or retrieved from a shared table (e.g., shared between multiple tenants). The system may then identify a data key, a tenant identifier, and a data type identifier associated with the data and generate a partition key that includes the data key, tenant identifier, and data type identifier. The system may then transmit the partition key to the shared table, and data may be written to or retrieved from the table based on the tenant-specific partition key.

    AGGREGATED AND DISTRIBUTED INVENTORY AVAILABILITY

    公开(公告)号:US20200097893A1

    公开(公告)日:2020-03-26

    申请号:US16139828

    申请日:2018-09-24

    Abstract: A method of inventory data aggregation and delivery over a distributed network comprises generating inventory data with respect to plural disparate sources, and publishing that data over a distributed network to an event processor. The method further includes receiving the published inventory data through subscription to the event processor and distributing it to a plurality of requesting devices, e.g., client devices, over the distributed network. This can include aggregating and filtering by locale or product-type the inventory data in response to requests received from those devices. This can further include reducing the aggregated, filtered data to accommodate inventory reserves, e.g., of retail outlets.

    MULTI-TENANT TABLES OF A DISTRIBUTED DATABASE

    公开(公告)号:US20190205459A1

    公开(公告)日:2019-07-04

    申请号:US15861470

    申请日:2018-01-03

    Abstract: A system may store data in a shared table of a distributed database based on generating a tenant-specific partition key. The system may receive a message from a first tenant that indicates certain data to be written to or retrieved from a shared table (e.g., shared between multiple tenants). The system may then identify a data key, a tenant identifier, and a data type identifier associated with the data and generate a partition key that includes the data key, tenant identifier, and data type identifier. The system may then transmit the partition key to the shared table, and data may be written to or retrieved from the table based on the tenant-specific partition key.

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