twalthr 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_r275307566
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File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/logical/groupWindows.scala
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@@ -50,43 +48,35 @@ case class TumblingGroupWindow(
alias,
timeField) {
- override def resolveExpressions(
- resolve: (PlannerExpression) => PlannerExpression): LogicalWindow =
- TumblingGroupWindow(
- resolve(alias),
- resolve(timeField),
- resolve(size))
+ override def validate(isStreaming: Boolean): Unit =
- override def validate(tableEnv: TableEnvironment): ValidationResult =
- super.validate(tableEnv).orElse(
- tableEnv match {
+ isStreaming match {
// check size
case _ if !isTimeIntervalLiteral(size) && !isRowCountLiteral(size) =>
- ValidationFailure(
+ throw new ValidationException(
"Tumbling window expects size literal of type Interval of
Milliseconds " +
"or Interval of Rows.")
// check time attribute
- case _: StreamTableEnvironment if !isTimeAttribute(timeField) =>
- ValidationFailure(
+ case true if !isTimeAttribute(timeField) =>
Review comment:
use a regular if/else statement
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