Timo Theusner created FLINK-40271:
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Summary: Group window properties produce invalid SQL in
QueryOperation#asSerializableString
Key: FLINK-40271
URL: https://issues.apache.org/jira/browse/FLINK-40271
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Reporter: Timo Theusner
Table API group-window properties ({{{}$("w").rowtime(){}}},
{{{}$("w").proctime(){}}}, {{{}$("w").start(){}}}, {{$("w").end())}} are not
translated to the corresponding windowing-TVF output columns when a
{{WindowAggregateQueryOperation}} is serialized back to SQL. Instead, the
window alias is emitted as if it were a column reference, producing SQL that
does not parse. This has the effect that the example from the official docs do
not work:
{code:java}
Table t = env.from("orders")
.window(Tumble.over(lit(1).minutes()).on($("ts")).as("w"))
.groupBy($("product_id"), $("w"))
.select($("product_id"), $("w").start(), $("w").end(),
$("w").rowtime(), $("price").sum());
String sql = t.getQueryOperation()
.asSerializableString(DefaultSqlFactory.INSTANCE);
env.sqlQuery(sql); // fails
{code}
Corresponding error message:
{code:java}
org.apache.flink.table.api.ValidationException: SQL validation failed. Column
'w' not found in any table {code}
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