EVENT PROCESSING QUERY LANGUAGE USING PATTERN MATCHING

• US 20080301135A1
• Filed: 03/06/2008
• Published: 12/04/2008
• Est. Priority Date: 05/29/2007
• Status: Abandoned Application

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: BEA Systems Incorporated (Oracle Corporation)
• Inventors: Alves, Alexandre de Castro, Taylor, James
• Application Number:
  US12/043,552
• Publication Number:
  US 20080301135A1
• Time in Patent Office: Days
• US Class Current: 707/6
• CPC Class Codes: G06F 16/2453 Query optimisation

Abstract

An event processor can use event processing queries to operate on an event stream. Event processing queries can include a “matching” function that matches a pattern in the event stream.

Claims

1. A computer-implemented system comprising:

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

matching”

function that matches a pattern in the event stream.

2. The computer-implemented system of claim 1, wherein a variable is bound to the event that matches.

3. The computer implemented system of claim 2, wherein the variable is used in a later query expression.

4. The computer-implemented system of claim 1, wherein the first or second stream filtered before the matching by filter clause of the query.

5. The computer-implemented system of claim 1, wherein a “

followed by”

operator is used to match event conditions in a particular order.

6. The computer implemented system of claim 1, wherein a query can use Boolean operations for a match.

7. The computer-implemented system of claim 6, wherein the Boolean operations include an “

AND”

.

8. The computer-implemented system of claim 6, wherein the Boolean operations include an “

OR”

.

9. The computer-implemented system of claim 6, wherein the Boolean operations include a “

NOT”

.

10. A computer-implemented method comprising:

receiving an event stream; and

using an event processing query language “

matching”

function to match a pattern in the event stream.

11. The computer-implemented method of claim 10, wherein a variable is bound to the event that matches.

12. The computer implemented method of claim 11, wherein the variable is used in a later query expression.

13. The computer-implemented method of claim 10, wherein the first or second stream filtered before the matching by filter clause of the query.

14. The computer-implemented method of claim 10, wherein a “

followed by”

operator is used to match event conditions in a particular order.

15. The computer implemented method of claim 10, wherein a query can use Boolean operations for a match.

16. The computer-implemented method of claim 15, wherein the Boolean operations include an “

AND”

.

17. The computer-implemented method of claim 15, wherein the Boolean operations include an “

OR”

.

18. The computer-implemented method of claim 15, wherein the Boolean operations include a “

NOT”

.

19. A computer readable storage medium comprising:

receive an event stream; and

use an event processing query language “

matching”

function to match a pattern in the event stream.

20. The computer readable storage medium of claim 19, wherein a variable is bound to the event that matches.

21. The computer readable storage medium of claim 20, wherein the variable is used in a later query expression.

22. The computer readable storage medium of claim 19, wherein the first or second stream filtered before the matching by filter clause of the query.

23. The computer readable storage medium of claim 19, wherein a “

followed by”

operator is used to match event conditions in a particular order.

24. The computer readable storage medium of claim 19, wherein a query can use Boolean operations for a match.

25. The computer readable storage medium of claim 19, wherein the Boolean operations include an “

AND”

.

26. The computer readable storage medium of claim 19, wherein the Boolean operations include an “

OR”

.

27. The computer readable storage medium of claim 19, wherein the Boolean operations include a “

NOT”

.