org.apache.flink.table.planner.plan.nodes.physical.stream.StreamPhysicalDropUpdateBefore.scala Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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package org.apache.flink.table.planner.plan.nodes.physical.stream
import org.apache.flink.table.planner.calcite.FlinkTypeFactory
import org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecDropUpdateBefore
import org.apache.flink.table.planner.plan.nodes.exec.{InputProperty, ExecNode}
import org.apache.flink.table.planner.plan.utils.ChangelogPlanUtils
import org.apache.calcite.plan.{RelOptCluster, RelTraitSet}
import org.apache.calcite.rel.`type`.RelDataType
import org.apache.calcite.rel.{RelNode, SingleRel}
import java.util
/**
* Stream physical RelNode which will drop the UPDATE_BEFORE messages.
* This is usually used as an optimization for the downstream operators that doesn't need
* the UPDATE_BEFORE messages, but the upstream operator can't drop it by itself (e.g. the source).
*/
class StreamPhysicalDropUpdateBefore(
cluster: RelOptCluster,
traitSet: RelTraitSet,
input: RelNode)
extends SingleRel(cluster, traitSet, input)
with StreamPhysicalRel {
override def requireWatermark: Boolean = false
override def deriveRowType(): RelDataType = getInput.getRowType
override def copy(traitSet: RelTraitSet, inputs: util.List[RelNode]): RelNode = {
new StreamPhysicalDropUpdateBefore(
cluster,
traitSet,
inputs.get(0))
}
override def translateToExecNode(): ExecNode[_] = {
// sanity check
if (ChangelogPlanUtils.generateUpdateBefore(this)) {
throw new IllegalStateException(s"${this.getClass.getSimpleName} is required to emit " +
s"UPDATE_BEFORE messages. This should never happen.")
}
new StreamExecDropUpdateBefore(
InputProperty.DEFAULT,
FlinkTypeFactory.toLogicalRowType(getRowType),
getRelDetailedDescription
)
}
}