EVENT PROCESSING QUERY LANGUAGE INCLUDING RETAIN CLAUSE

• US 20080301124A1
• Filed: 03/06/2008
• Published: 12/04/2008
• Est. Priority Date: 05/29/2007
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: BEA Systems Incorporated (Oracle Corporation)
• Inventors: Alves, Alexandre de Castro, Taylor, James
• Granted Patent: US 8,122,006 B2
• Time in Patent Office: Days
• US Class Current: 707/5
• CPC Class Codes: G06F 16/2453 Query optimisation

Abstract

An event processor can use event processing queries to operate an event. Event processing queries can include a “retain” clause that limits the amount of data over which the query is run.

Claims

1. A computer implemented system comprising:

an event processor using event processing queries to operate on an event, at least some event processing queries including a “

retain”

clause that limits the amount of data over which the query is run.

2. The computer implemented system of claim 1, wherein the retain clause limits the query to a certain time period of the events.

3. The computer implemented system of claim 1, wherein the retain clause limits the query to a certain number of events.

4. The computer implemented system of claim 1, wherein the retain clause causes the system to process incoming events in a manner that the query can be easily run.

5. The computer implemented system of claim 1, wherein the at least one query is done as a sliding window.

6. The computer implemented system of claim 1, wherein the at least one query further includes pattern matching functionality.

7. The computer implemented system of claim 1, wherein the at least one query includes an output clause that can limit the output of the query.

8. A computer implemented method comprising:

retaining events from an event stream according to a “

retain”

clause of an event processing query; and

running the event processing query on the retained events.

9. The computer implemented method of claim 8, wherein the retain clause limits the query to a certain time period of the events.

10. The computer implemented method of claim 8, wherein the retain clause limits the query to a certain number of events.

11. The computer implemented method of claim 8, wherein the retain clause causes the system to process incoming events in a manner that the query can be easily run.

12. The computer implemented method of claim 8, wherein the query is done as a sliding window.

13. The computer implemented method of claim 8, wherein the query includes pattern matching functionality.

14. The computer implemented method of claim 8, wherein the query includes an output clause that can limit the output of the query.

15. A computer readable storage medium including code to:

retain events from an event stream according to a “

retain”

clause of an event processing query; and

run the event processing query on the retained events.

16. The computer readable storage medium of claim 15, wherein the retain clause limits the query to a certain time period of the events.

17. The computer readable storage medium of claim 15, wherein the retain clause limits the query to a certain number of events.

18. The computer readable storage medium of claim 15, wherein the retain clause causes the system to process incoming events in a manner that the query can be easily run.

19. The computer readable storage medium of claim 15, wherein the query is done as a sliding window.

20. The computer readable storage medium of claim 15, wherein the query includes pattern matching functionality.

21. The computer readable storage medium of claim 15, wherein the query includes an output clause that can limit the output of the query.