| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.flink.table.plan.nodes |
| |
| import org.apache.calcite.rel.`type`.RelDataType |
| import org.apache.calcite.rel.core.Window.Group |
| import org.apache.calcite.rel.core.{AggregateCall, Window} |
| import org.apache.calcite.rel.{RelFieldCollation, RelNode} |
| import org.apache.calcite.rex.{RexInputRef, RexLiteral} |
| import org.apache.flink.table.runtime.aggregate.AggregateUtil._ |
| |
| import scala.collection.JavaConverters._ |
| |
| trait OverAggregate { |
| |
| private[flink] def partitionToString(inputType: RelDataType, partition: Array[Int]): String = { |
| val inFields = inputType.getFieldNames.asScala |
| partition.map( inFields(_) ).mkString(", ") |
| } |
| |
| private[flink] def orderingToString( |
| inputType: RelDataType, |
| orderFields: java.util.List[RelFieldCollation]): String = { |
| |
| val inFields = inputType.getFieldList.asScala |
| |
| val orderingString = orderFields.asScala.map { |
| x => inFields(x.getFieldIndex).getName |
| }.mkString(", ") |
| |
| orderingString |
| } |
| |
| private[flink] def windowRange( |
| logicWindow: Window, |
| overWindow: Group, |
| input: RelNode): String = { |
| if (overWindow.lowerBound.isPreceding && !overWindow.lowerBound.isUnbounded) { |
| s"BETWEEN ${getLowerBoundary(logicWindow, overWindow, input)} PRECEDING " + |
| s"AND ${overWindow.upperBound}" |
| } else { |
| s"BETWEEN ${overWindow.lowerBound} AND ${overWindow.upperBound}" |
| } |
| } |
| |
| private[flink] def aggregationToString( |
| inputType: RelDataType, |
| constants: Seq[RexLiteral], |
| rowType: RelDataType, |
| namedAggregates: Seq[CalcitePair[AggregateCall, String]]): String = { |
| |
| val inFields = inputType.getFieldNames.asScala |
| val outFields = rowType.getFieldNames.asScala |
| |
| val aggStrings = namedAggregates.map(_.getKey).map( |
| a => s"${a.getAggregation}(${ |
| val prefix = if (a.isDistinct) { |
| "DISTINCT " |
| } else { |
| "" |
| } |
| prefix + (if (a.getArgList.size() > 0) { |
| a.getArgList.asScala.map { arg => |
| // index to constant |
| if (arg >= inputType.getFieldCount) { |
| constants(arg - inputType.getFieldCount) |
| } |
| // index to input field |
| else { |
| inFields(arg) |
| } |
| }.mkString(", ") |
| } else { |
| "*" |
| }) |
| })") |
| |
| (inFields ++ aggStrings).zip(outFields).map { |
| case (f, o) => if (f == o) { |
| f |
| } else { |
| s"$f AS $o" |
| } |
| }.mkString(", ") |
| } |
| |
| private[flink] def getLowerBoundary( |
| logicWindow: Window, |
| overWindow: Group, |
| input: RelNode): Long = { |
| |
| val ref: RexInputRef = overWindow.lowerBound.getOffset.asInstanceOf[RexInputRef] |
| val lowerBoundIndex = ref.getIndex - input.getRowType.getFieldCount |
| val lowerBound = logicWindow.constants.get(lowerBoundIndex).getValue2 |
| lowerBound match { |
| case x: java.math.BigDecimal => x.asInstanceOf[java.math.BigDecimal].longValue() |
| case _ => lowerBound.asInstanceOf[Long] |
| } |
| } |
| |
| } |