Persistent querying in a federated database system
First Claim
1. A method for persistent querying in a federated database system having a plurality of connectable database management system nodes, each database node having at least one database, the method comprising:
- receiving a query at a first database node;
propagating the query from the first database node to other database nodes in the federated database system;
receiving, by the first database node, query results sets from at least one responding node, wherein at least one responding node satisfying the query;
obtains a query results set;
defines a topic identifier for the query; and
publishes subsequent messages relating to the topic identifier when data updates are available;
subscribing, by the first database node, to topic identifiers for publications of subsequent messages from the responding database nodes; and
optimizing a route from the responding node to the first database node by periodically re-issuing the query from the first database node to other database nodes in the federated database system and wherein the responding node further defines a new topic identifier associated with the re-issued query.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and systems are provided, for persistent querying in a federated database system. A federated database system has a plurality of connectable database management system nodes, each database node having at least one database. Persistent querying includes: receiving a query at a first database node and propagating the query from the first database node to other database nodes in the federated database system. A responding database node satisfying the query: obtains a query results set; defines a topic identifier for the query; and publishes subsequent messages relating to the topic identifier when data updates are available. The first database node receives query results sets from one or more responding nodes and the first database node subscribes to topic identifiers for publications of subsequent messages from the responding database nodes. Subsequent messages are published relating to the query along the connection through which the query is returned.
24 Citations
23 Claims
-
1. A method for persistent querying in a federated database system having a plurality of connectable database management system nodes, each database node having at least one database, the method comprising:
-
receiving a query at a first database node; propagating the query from the first database node to other database nodes in the federated database system; receiving, by the first database node, query results sets from at least one responding node, wherein at least one responding node satisfying the query; obtains a query results set; defines a topic identifier for the query; and publishes subsequent messages relating to the topic identifier when data updates are available; subscribing, by the first database node, to topic identifiers for publications of subsequent messages from the responding database nodes; and optimizing a route from the responding node to the first database node by periodically re-issuing the query from the first database node to other database nodes in the federated database system and wherein the responding node further defines a new topic identifier associated with the re-issued query. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 23)
-
-
12. A computer-readable storage device with an executable program for persistent querying in a federated database system having a plurality of connectable database management system nodes, each database node having at least one database, wherein the program instructs a processor to perform:
-
receiving a query at a first database node; propagating the query from the first database node to other database nodes in the federated database system; receiving, by the first database node, query results sets from at least one responding node, wherein at least one responding node satisfying the query; obtains a query results set; defines a topic identifier for the query; and publishes subsequent messages relating to the topic identifier when data updates are available; subscribing, by the first database node, to topic identifiers for publications of subsequent messages from the responding database nodes; optimizing a route from the responding node to the first database node by periodically re-issuing the query from the first database node to other database nodes in the federated database system and wherein the responding node further defines a new topic identifier associated with the re-issued query.
-
-
13. A system for persistent querying in a federated database system with a plurality of connectable database management system nodes, each database node having at least one database, comprising:
a processor coupled to a memory such that the processor is programmed to implement; a query mechanism for receiving a query at a first database node; a propagating mechanism for propagating the query from the first database node to other database nodes in the federated database system; a responding database node including; a query results set obtaining component; and a topic identifier defining component for the query; and a publisher application for publishing subsequent messages relating to the topic identifier when data updates are available; wherein; the first database node includes a results receiving component for query results sets from one or more responding nodes; the first database node includes a subscriber application for subscribing to topic identifiers for publications of subsequent messages from the responding database nodes; and the first database node optimizes a route from the responding node to the first database node by periodically re-issuing the query from the first database node to other database nodes in the federated database system and wherein the responding node further defines a new topic identifier associated with the re-issued query. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification