dawidwys commented on a change in pull request #8062: [FLINK-11884][table]
Implement expression resolution on top of new Expressions
URL: https://github.com/apache/flink/pull/8062#discussion_r277756475
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/logical/groupWindows.scala
##########
@@ -39,164 +34,39 @@ case class LogicalOverWindow(
following: Optional[Expression])
//
------------------------------------------------------------------------------------------------
-// Tumbling group windows
+// Group windows
//
------------------------------------------------------------------------------------------------
+sealed trait LogicalWindow {
+ def timeAttribute: PlannerExpression
+ def aliasAttribute: PlannerExpression
+}
+
case class TumblingGroupWindow(
- alias: PlannerExpression,
- timeField: PlannerExpression,
+ aliasAttribute: PlannerExpression,
+ timeAttribute: PlannerExpression,
size: PlannerExpression)
- extends LogicalWindow(
- alias,
- timeField) {
-
- override def resolveExpressions(
- resolve: (PlannerExpression) => PlannerExpression): LogicalWindow =
- TumblingGroupWindow(
- resolve(alias),
- resolve(timeField),
- resolve(size))
-
- override def validate(tableEnv: TableEnvironment): ValidationResult =
- super.validate(tableEnv).orElse(
- tableEnv match {
-
- // check size
- case _ if !isTimeIntervalLiteral(size) && !isRowCountLiteral(size) =>
- ValidationFailure(
- "Tumbling window expects size literal of type Interval of
Milliseconds " +
Review comment:
Actually I somehow missed that check. We also didn't have tests for this
case unfortunately. I reintroduced this check and added tests to validate it.
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