There are a number of pattern-matching operators that you can use inside a MATCHING clause.
|
Operator |
Symbol |
Description |
|---|---|---|
|
Sequence |
, |
The events separated with the sequence operator must appear within the event interval in the sequence specified in the MATCHING clause. A,B means that event B must follow A in order to match. Sequences may not contain two non-events. Thus A, !B, C is valid but !A, B, !C is invalid. |
|
Negation |
! |
The non-event may not appear in the event interval. |
|
Conjunction ("and") |
&& |
Both events must appear in the event interval but either event may occur first. |
|
Disjunction ("or") |
|| |
Either event (or both) may appear in the event interval. |