org.apache.flink.table.plan.schema.IntermediateBoundedStreamTable.scala Maven / Gradle / Ivy
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package org.apache.flink.table.plan.schema
import org.apache.calcite.rel.`type`.{RelDataType, RelDataTypeFactory}
import org.apache.flink.streaming.api.datastream.DataStream
import org.apache.flink.table.plan.stats.{FlinkStatistic, TableStats}
/**
* Intermediate bounded stream is a intermediate result table of segmentation optimization.
*/
class IntermediateBoundedStreamTable[T](
val rowType: RelDataType,
dataStream: DataStream[T],
fieldIndexes: Array[Int],
fieldNames: Array[String],
statistic: FlinkStatistic = FlinkStatistic.builder.tableStats((TableStats(1000L))).build())
extends DataStreamTable[T](dataStream, false, false, fieldIndexes, fieldNames, statistic) {
override def getRowType(typeFactory: RelDataTypeFactory): RelDataType = {
// the row type of intermediate bounded stream should keep the same as logical plan
// eg: Varchar(2000) -> String will lose type information.
rowType
}
override def copy(statistic: FlinkStatistic): DataStreamTable[T] =
new IntermediateBoundedStreamTable(rowType, dataStream, fieldIndexes, fieldNames, statistic)
}