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[FLINK-6261] [table] Support TUMBLE, HOP, SESSION group window functi…
…ons for SQL queries on batch tables. - Drop support for group window translation of "GROUP BY FLOOR/CEIL". This closes apache#3675.
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144 changes: 144 additions & 0 deletions
144
.../src/main/scala/org/apache/flink/table/plan/rules/common/LogicalWindowAggregateRule.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| /* | ||
| * 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.rules.common | ||
|
|
||
| import com.google.common.collect.ImmutableList | ||
| import org.apache.calcite.plan._ | ||
| import org.apache.calcite.plan.hep.HepRelVertex | ||
| import org.apache.calcite.rel.`type`.RelDataType | ||
| import org.apache.calcite.rel.logical.{LogicalAggregate, LogicalProject} | ||
| import org.apache.calcite.rex._ | ||
| import org.apache.calcite.sql.fun.SqlStdOperatorTable | ||
| import org.apache.calcite.util.ImmutableBitSet | ||
| import org.apache.flink.table.api._ | ||
| import org.apache.flink.table.calcite.FlinkRelBuilder.NamedWindowProperty | ||
| import org.apache.flink.table.plan.logical.rel.LogicalWindowAggregate | ||
|
|
||
| import _root_.scala.collection.JavaConversions._ | ||
|
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| abstract class LogicalWindowAggregateRule(ruleName: String) | ||
| extends RelOptRule( | ||
| RelOptRule.operand(classOf[LogicalAggregate], | ||
| RelOptRule.operand(classOf[LogicalProject], RelOptRule.none())), | ||
| ruleName) { | ||
|
|
||
| override def matches(call: RelOptRuleCall): Boolean = { | ||
| val agg = call.rel(0).asInstanceOf[LogicalAggregate] | ||
|
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| val distinctAggs = agg.getAggCallList.exists(_.isDistinct) | ||
| val groupSets = agg.getGroupSets.size() != 1 || agg.getGroupSets.get(0) != agg.getGroupSet | ||
|
|
||
| val windowExpressions = getWindowExpressions(agg) | ||
| if (windowExpressions.length > 1) { | ||
| throw new TableException("Only a single window group function may be used in GROUP BY") | ||
| } | ||
|
|
||
| !distinctAggs && !groupSets && !agg.indicator && windowExpressions.nonEmpty | ||
| } | ||
|
|
||
| /** | ||
| * Transform LogicalAggregate with windowing expression to LogicalProject | ||
| * + LogicalWindowAggregate + LogicalProject. | ||
| * | ||
| * The transformation adds an additional LogicalProject at the top to ensure | ||
| * that the types are equivalent. | ||
| */ | ||
| override def onMatch(call: RelOptRuleCall): Unit = { | ||
| val agg = call.rel[LogicalAggregate](0) | ||
| val project = agg.getInput.asInstanceOf[HepRelVertex].getCurrentRel.asInstanceOf[LogicalProject] | ||
|
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| val (windowExpr, windowExprIdx) = getWindowExpressions(agg).head | ||
| val window = translateWindowExpression(windowExpr, project.getInput.getRowType) | ||
|
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| val builder = call.builder() | ||
| val rexBuilder = builder.getRexBuilder | ||
|
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| val inAggGroupExpression = getInAggregateGroupExpression(rexBuilder, windowExpr) | ||
| val newGroupSet = agg.getGroupSet.except(ImmutableBitSet.of(windowExprIdx)) | ||
| val newAgg = builder | ||
| .push(project.getInput) | ||
| .project(project.getChildExps.updated(windowExprIdx, inAggGroupExpression)) | ||
| .aggregate(builder.groupKey( | ||
| newGroupSet, | ||
| agg.indicator, ImmutableList.of(newGroupSet)), agg.getAggCallList) | ||
| .build().asInstanceOf[LogicalAggregate] | ||
|
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| // Create an additional project to conform with types | ||
| val outAggGroupExpression = getOutAggregateGroupExpression(rexBuilder, windowExpr) | ||
| val transformed = call.builder() | ||
| transformed.push(LogicalWindowAggregate.create( | ||
| window.toLogicalWindow, | ||
| Seq[NamedWindowProperty](), | ||
| newAgg)) | ||
| .project(transformed.fields().patch(windowExprIdx, Seq(outAggGroupExpression), 0)) | ||
|
|
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| call.transformTo(transformed.build()) | ||
| } | ||
|
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| private[table] def getWindowExpressions(agg: LogicalAggregate): Seq[(RexCall, Int)] = { | ||
|
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| val project = agg.getInput.asInstanceOf[HepRelVertex].getCurrentRel.asInstanceOf[LogicalProject] | ||
| val groupKeys = agg.getGroupSet | ||
|
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| // get grouping expressions | ||
| val groupExpr = project.getProjects.zipWithIndex.filter(p => groupKeys.get(p._2)) | ||
|
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| // filter grouping expressions for window expressions | ||
| groupExpr.filter { g => | ||
| g._1 match { | ||
| case call: RexCall => | ||
| call.getOperator match { | ||
| case SqlStdOperatorTable.TUMBLE => | ||
| if (call.getOperands.size() == 2) { | ||
| true | ||
| } else { | ||
| throw TableException("TUMBLE window with alignment is not supported yet.") | ||
| } | ||
| case SqlStdOperatorTable.HOP => | ||
| if (call.getOperands.size() == 3) { | ||
| true | ||
| } else { | ||
| throw TableException("HOP window with alignment is not supported yet.") | ||
| } | ||
| case SqlStdOperatorTable.SESSION => | ||
| if (call.getOperands.size() == 2) { | ||
| true | ||
| } else { | ||
| throw TableException("SESSION window with alignment is not supported yet.") | ||
| } | ||
| case _ => false | ||
| } | ||
| case _ => false | ||
| } | ||
| }.map(w => (w._1.asInstanceOf[RexCall], w._2)) | ||
| } | ||
|
|
||
| /** Returns the expression that replaces the window expression before the aggregation. */ | ||
| private[table] def getInAggregateGroupExpression( | ||
| rexBuilder: RexBuilder, | ||
| windowExpression: RexCall): RexNode | ||
|
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||
| /** Returns the expression that replaces the window expression after the aggregation. */ | ||
| private[table] def getOutAggregateGroupExpression( | ||
| rexBuilder: RexBuilder, | ||
| windowExpression: RexCall): RexNode | ||
|
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| /** translate the group window expression in to a Flink Table window. */ | ||
| private[table] def translateWindowExpression(windowExpr: RexCall, rowType: RelDataType): Window | ||
|
|
||
| } |
92 changes: 92 additions & 0 deletions
92
...n/scala/org/apache/flink/table/plan/rules/dataSet/DataSetLogicalWindowAggregateRule.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| /* | ||
| * 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.rules.dataSet | ||
|
|
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| import java.math.BigDecimal | ||
| import org.apache.calcite.rel.`type`.RelDataType | ||
| import org.apache.calcite.rex._ | ||
| import org.apache.calcite.sql.fun.SqlStdOperatorTable | ||
| import org.apache.flink.table.api.scala.{Session, Slide, Tumble} | ||
| import org.apache.flink.table.api.{TableException, Window} | ||
| import org.apache.flink.table.calcite.FlinkTypeFactory | ||
| import org.apache.flink.table.expressions.{Expression, Literal, ResolvedFieldReference} | ||
| import org.apache.flink.table.plan.rules.common.LogicalWindowAggregateRule | ||
| import org.apache.flink.table.typeutils.TimeIntervalTypeInfo | ||
|
|
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| class DataSetLogicalWindowAggregateRule | ||
| extends LogicalWindowAggregateRule("DataSetLogicalWindowAggregateRule") { | ||
|
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| /** Returns the operand of the group window function. */ | ||
| override private[table] def getInAggregateGroupExpression( | ||
| rexBuilder: RexBuilder, | ||
| windowExpression: RexCall): RexNode = windowExpression.getOperands.get(0) | ||
|
|
||
| /** Returns a zero literal of the correct type. */ | ||
| override private[table] def getOutAggregateGroupExpression( | ||
| rexBuilder: RexBuilder, | ||
| windowExpression: RexCall): RexNode = { | ||
|
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| val literalType = windowExpression.getOperands.get(0).getType | ||
| rexBuilder.makeZeroLiteral(literalType) | ||
| } | ||
|
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| override private[table] def translateWindowExpression( | ||
| windowExpr: RexCall, | ||
| rowType: RelDataType): Window = { | ||
|
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| def getOperandAsLong(call: RexCall, idx: Int): Long = | ||
| call.getOperands.get(idx) match { | ||
| case v: RexLiteral => v.getValue.asInstanceOf[BigDecimal].longValue() | ||
| case _ => throw new TableException("Only constant window descriptors are supported") | ||
| } | ||
|
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| def getFieldReference(operand: RexNode): Expression = { | ||
| operand match { | ||
| case ref: RexInputRef => | ||
| // resolve field name of window attribute | ||
| val fieldName = rowType.getFieldList.get(ref.getIndex).getName | ||
| val fieldType = rowType.getFieldList.get(ref.getIndex).getType | ||
| ResolvedFieldReference(fieldName, FlinkTypeFactory.toTypeInfo(fieldType)) | ||
| } | ||
| } | ||
|
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| windowExpr.getOperator match { | ||
| case SqlStdOperatorTable.TUMBLE => | ||
| val interval = getOperandAsLong(windowExpr, 1) | ||
| val w = Tumble.over(Literal(interval, TimeIntervalTypeInfo.INTERVAL_MILLIS)) | ||
| w.on(getFieldReference(windowExpr.getOperands.get(0))).as("w$") | ||
|
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| case SqlStdOperatorTable.HOP => | ||
| val (slide, size) = (getOperandAsLong(windowExpr, 1), getOperandAsLong(windowExpr, 2)) | ||
| val w = Slide | ||
| .over(Literal(size, TimeIntervalTypeInfo.INTERVAL_MILLIS)) | ||
| .every(Literal(slide, TimeIntervalTypeInfo.INTERVAL_MILLIS)) | ||
| w.on(getFieldReference(windowExpr.getOperands.get(0))).as("w$") | ||
|
|
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| case SqlStdOperatorTable.SESSION => | ||
| val gap = getOperandAsLong(windowExpr, 1) | ||
| val w = Session.withGap(Literal(gap, TimeIntervalTypeInfo.INTERVAL_MILLIS)) | ||
| w.on(getFieldReference(windowExpr.getOperands.get(0))).as("w$") | ||
| } | ||
| } | ||
| } | ||
|
|
||
| object DataSetLogicalWindowAggregateRule { | ||
| val INSTANCE = new DataSetLogicalWindowAggregateRule | ||
| } |
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