Aleksandra Cz created FLINK-20361:
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Summary: Using sliding window with duration of hours in Table API returns wrong time
Key: FLINK-20361
URL:
https://issues.apache.org/jira/browse/FLINK-20361 Project: Flink
Issue Type: Bug
Components: Table SQL / API
Affects Versions: 1.11.2, 1.11.1, 1.11.0
Environment: Java 11, test executed in IntelliJ IDE on mac OS.
Reporter: Aleksandra Cz
Fix For: 1.11.2
If in [Table walkthrough| [
https://github.com/apache/flink-playgrounds/blob/master/table-walkthrough/src/main/java/org/apache/flink/playgrounds/spendreport/SpendReport.java]]
implemented *report* method would be as follows:
{code:java}
public static Table report(Table transactions) {
return transactions
.window(Slide.over(lit(1).hours()).every(lit(5).minute()).on($("transaction_time")).as("log_ts"))
.groupBy($("log_ts"),$("account_id"))
.select(
$("log_ts").start().as("log_ts_start"),
$("log_ts").end().as("log_ts_end"),
$("account_id"),
$("amount").sum().as("amount"));
{code}
Then the resulting sliding window start and sliding window end would be in year 1969/1970. Please see first 3 elements of resulting table:
{code:java}
[1969-12-31T23:05,1970-01-01T00:05,3,432, 1969-12-31T23:10,1970-01-01T00:10,3,432, 1969-12-31T23:15,1970-01-01T00:15,3,432]{code}
This behaviour repeats if using SQL instead of Table API,
it does not repeat for window duration of minutes, nor in Tumbling window.
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