Major Description
Window is an important feature for pattern detection, it defines the time duration for the events to match a pattern. Here is an example from doc:
SELECT T.Ac2, T.Bc2, T.Cc2
FROM S
MATCH_RECOGNIZE(
MEASURES A.c2 as Ac2, B.c2 as Bc2, C.c2 as Cc2
PATTERN (A (B+ | C)) within 3000 milliseconds
DEFINE
A as A.c1=10 or A.c1=25,
B as B.c1=20 or B.c1=15 or B.c1=25,
C as C.c1=15
) as T