dianfu commented on code in PR #20029:
URL: https://github.com/apache/flink/pull/20029#discussion_r906937708
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flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/pattern/Pattern.java:
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@@ -579,6 +662,21 @@ private void checkIfPreviousPatternGreedy() {
}
}
+ private void checkWindowTimeBetweenEvents(Time windowTime, WithinType
withinType) {
Review Comment:
What about moving this validation to NFAFactoryCompilter.compileFactory? The
window time of `FIRST_AND_LAST` may be defined in other Pattern object which is
only available during compiling the Pattern.
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