Timo Walther created FLINK-6584:
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Summary: Support multiple consecutive windows in SQL
Key: FLINK-6584
URL: https://issues.apache.org/jira/browse/FLINK-6584
Project: Flink
Issue Type: New Feature
Components: Table API & SQL
Reporter: Timo Walther
Right now, the Table API supports multiple consecutive windows as follows:
{code}
val table = stream.toTable(tEnv, 'rowtime.rowtime, 'int, 'double, 'float,
'bigdec, 'string)
val t = table
.window(Tumble over 2.millis on 'rowtime as 'w)
.groupBy('w)
.select('w.rowtime as 'rowtime, 'int.count as 'int)
.window(Tumble over 4.millis on 'rowtime as 'w2)
.groupBy('w2)
.select('w2.rowtime, 'w2.end, 'int.count)
{code}
Similar behavior should be supported by the SQL API as well. We need to
introduce a new auxiliary group function, but this should happen in sync with
Apache Calcite.
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