zjuwangg commented on a change in pull request #18982:
URL: https://github.com/apache/flink/pull/18982#discussion_r824368943
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File path:
flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/window/TimeWindow.java
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@@ -220,7 +220,9 @@ public TimeWindowSerializerSnapshot() {
* @return window start
*/
public static long getWindowStartWithOffset(long timestamp, long offset,
long windowSize) {
- return timestamp - (timestamp - offset + windowSize) % windowSize;
+ return timestamp
+ - (timestamp - offset) % windowSize
+ - (windowSize & (timestamp - offset) >> 63);
Review comment:
`(windowSize & (timestamp - offset) >> 63` hard to understand, better to
add more comments.
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