wuchong commented on a change in pull request #10316:
[FLINK-14624][table-blink] Support computed column as rowtime attribute
URL: https://github.com/apache/flink/pull/10316#discussion_r353735616
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/nodes/physical/stream/StreamExecWatermarkAssigner.scala
##########
@@ -62,37 +63,36 @@ class StreamExecWatermarkAssigner(
override def requireWatermark: Boolean = false
- override def copy(traitSet: RelTraitSet, inputs: util.List[RelNode]):
RelNode = {
- new StreamExecWatermarkAssigner(
- cluster,
- traitSet,
- inputs.get(0),
- rowtimeFieldIndex,
- watermarkDelay)
+ override def copy(
+ traitSet: RelTraitSet,
+ input: RelNode,
+ rowtime: Int,
+ watermark: RexNode): RelNode = {
+ new StreamExecWatermarkAssigner(cluster, traitSet, input, rowtime,
watermark)
}
+ /**
+ * Fully override this method to have a better display name of this RelNode.
+ */
override def explainTerms(pw: RelWriter): RelWriter = {
- val miniBatchInterval =
traits.getTrait(MiniBatchIntervalTraitDef.INSTANCE).getMiniBatchInterval
-
- val value = if (miniBatchInterval.mode == MiniBatchMode.None ||
- miniBatchInterval.interval == 0) {
- // 1. redundant watermark definition in DDL
- // 2. existing window aggregate
- // 3. operator requiring watermark, but minibatch is not enabled
- "None"
- } else if (miniBatchInterval.mode == MiniBatchMode.ProcTime) {
- val tableConfig =
cluster.getPlanner.getContext.unwrap(classOf[FlinkContext]).getTableConfig
- val miniBatchLatency = getMillisecondFromConfigDuration(tableConfig,
- ExecutionConfigOptions.TABLE_EXEC_MINIBATCH_ALLOW_LATENCY)
- Preconditions.checkArgument(miniBatchLatency > 0,
- "MiniBatch latency must be greater that 0 ms.", null)
- s"Proctime, ${miniBatchLatency}ms"
- } else if (miniBatchInterval.mode == MiniBatchMode.RowTime) {
- s"Rowtime, ${miniBatchInterval.interval}ms"
- } else {
- throw new TableException(s"Unsupported mode: $miniBatchInterval")
- }
- super.explainTerms(pw).item("miniBatchInterval", value)
+ val inFieldNames = inputRel.getRowType.getFieldNames.toList
+ val rowtimeFieldName = inFieldNames(rowtimeFieldIndex)
+ val miniBatchInterval = traits
Review comment:
I think `WatermarkAssigner` is independent with `MiniBatchAssigner`. It is
the `MiniBatchIntervalTrait` related with these 2 nodes. However, the
`MiniBatchIntervalTrait` indeed should cooperate with watermark and without
watermark.
In the past, `WatermarkAssigner` and `MiniBatchAssigner` stayed in a single
node, which makes the code complex and member fields nullable and hard to
maintain.
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