4 results about "Object-relational database" patented technology

Techniques discussed herein relate to an object-relational database management system (ODMS) (e.g., a PostgreSQL ODMS) that provides in-line materialization of database pages corresponding to read requests. A replica node of the ODMS may be configured to share access to a shared block storage volume with a primary node. The replica node may receive log updates from the primary indicating changes to the object-relational database. The read replica, in response to receiving a read request, may update a previous version of a database page, store the database page in local memory, and replay the log updates to update the database page in local memory. Data may be provided from the updated database page in response to the read request.

The invention discloses a target object obtaining method and device, equipment, a computer medium and a product, and is applied to the field of object processing. Based on the initial object set, determining an object relation database corresponding to the initial object set; determining a query level of the initial object set based on the business type to which the initial object set belongs; obtaining a pre-constructed structured query statement template, wherein the structured query statement template comprises a plurality of variable placeholders; respectively filling the initial object set, the business type and the query level into corresponding variable placeholders, and constructing a structured query statement for querying an association relationship between the objects; and on the basis of the structured query statement, performing association relationship query on the object relationship database to obtain a target object having an association relationship with the initial object set. According to the method, the query efficiency and accuracy of the target object are improved, and computing resources are reduced.

Techniques discussed herein relate to an object-relational database management system (ODMS) (e.g., a PostgreSQL ODMS) that utilizes a shared block storage volume (SBSV) for storage. The SBSV may utilize a file system that enables a single-writer-multiple reader model in which a primary computing node may read or write to the SBSV and one or more replica computing nodes are restricted from writing to the SBSV. To enable the primary computing node to write data at its own pace, regardless of the status of synchronization at each of the one or more replica computing nodes, the SBSV may include a staging area that maintains data that has not yet been updated at one or more of the replica computing nodes. When the primary computing node no longer maintains the data in local memory, the one or more replica computing nodes may obtain the data from the staging area of the SBSV.

The application discloses a geographic space-time modeling method, system, product, equipment and storage medium for twin space virtual-real interaction, abstracts geographic entities, sensors, geographic data, geographic models, rule knowledge, geographic objects and controllers in twin space virtual-real interaction into corresponding nodes respectively, constructs edges connecting the nodes according to predefined logical relationships between the nodes, and generates a semantic and logical expression model for twin space virtual-real interaction; based on a graph database and the semantic and logical expression model, node storage files of the nodes and edge storage files of the edges are constructed; based on an object-relational database, an object storage table is constructed; through a geographic object identifier, an association between an object node in the graph database and a geographic object table record in the object-relational database is established, and the problem of element fragmentation and process breakpoint in existing virtual-real interaction modeling is solved.