JingsongLi commented on a change in pull request #8901: [FLINK-13003][table-planner-blink] Support Temporal TableFunction Join in blink planner URL: https://github.com/apache/flink/pull/8901#discussion_r298441480
########## File path: flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/plan/nodes/physical/stream/StreamExecTemporalTableJoin.scala ########## @@ -0,0 +1,422 @@ +/* + * 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.physical.stream + +import org.apache.flink.api.java.typeutils.ResultTypeQueryable +import org.apache.flink.streaming.api.operators.TwoInputStreamOperator +import org.apache.flink.streaming.api.transformations.{StreamTransformation, TwoInputTransformation} +import org.apache.flink.table.api.{StreamTableEnvironment, TableConfig, TableException, ValidationException} +import org.apache.flink.table.calcite.FlinkTypeFactory +import org.apache.flink.table.calcite.FlinkTypeFactory.{isProctimeIndicatorType, isRowtimeIndicatorType} +import org.apache.flink.table.codegen.{CodeGeneratorContext, ExprCodeGenerator, FunctionCodeGenerator} +import org.apache.flink.table.dataformat.BaseRow +import org.apache.flink.table.generated.GeneratedJoinCondition +import org.apache.flink.table.plan.nodes.common.CommonPhysicalJoin +import org.apache.flink.table.plan.nodes.exec.{ExecNode, StreamExecNode} +import org.apache.flink.table.plan.util.TemporalJoinUtil.TEMPORAL_JOIN_CONDITION +import org.apache.flink.table.plan.util.{InputRefVisitor, KeySelectorUtil, RelExplainUtil, TemporalJoinUtil} +import org.apache.flink.table.runtime.join.temporal.{TemporalProcessTimeJoinOperator, TemporalRowTimeJoinOperator} +import org.apache.flink.table.runtime.keyselector.BaseRowKeySelector +import org.apache.flink.table.types.logical.RowType +import org.apache.flink.table.typeutils.BaseRowTypeInfo +import org.apache.flink.util.Preconditions.checkState +import org.apache.calcite.plan.{RelOptCluster, RelTraitSet} +import org.apache.calcite.rel.RelNode +import org.apache.calcite.rel.core.{Join, JoinInfo, JoinRelType} +import org.apache.calcite.rex._ + +import java.util + +import scala.collection.JavaConversions._ + +class StreamExecTemporalTableJoin( + cluster: RelOptCluster, + traitSet: RelTraitSet, + leftRel: RelNode, + rightRel: RelNode, + condition: RexNode, + joinType: JoinRelType) + extends CommonPhysicalJoin(cluster, traitSet, leftRel, rightRel, condition, joinType) + with StreamPhysicalRel + with StreamExecNode[BaseRow] { + + override def producesUpdates: Boolean = false + + override def needsUpdatesAsRetraction(input: RelNode): Boolean = false + + override def consumesRetractions: Boolean = false + + override def producesRetractions: Boolean = false + + override def requireWatermark: Boolean = { + val nonEquiJoinRex = getJoinInfo.getRemaining(cluster.getRexBuilder) + + var rowtimeJoin: Boolean = false + val visitor = new RexVisitorImpl[Unit](true) { + override def visitCall(call: RexCall): Unit = { + if (call.getOperator == TEMPORAL_JOIN_CONDITION) { + rowtimeJoin = TemporalJoinUtil.isRowtimeCall(call) + } else { + call.getOperands.foreach(node => node.accept(this)) + } + } + } + nonEquiJoinRex.accept(visitor) + rowtimeJoin + } + + override def copy( + traitSet: RelTraitSet, + conditionExpr: RexNode, + left: RelNode, + right: RelNode, + joinType: JoinRelType, + semiJoinDone: Boolean): Join = { + new StreamExecTemporalTableJoin( + cluster, + traitSet, + left, + right, + conditionExpr, + joinType) + } + + //~ ExecNode methods ----------------------------------------------------------- + + override def getInputNodes: util.List[ExecNode[StreamTableEnvironment, _]] = { + getInputs.map(_.asInstanceOf[ExecNode[StreamTableEnvironment, _]]) + } + + override def replaceInputNode( + ordinalInParent: Int, + newInputNode: ExecNode[StreamTableEnvironment, _]): Unit = { + replaceInput(ordinalInParent, newInputNode.asInstanceOf[RelNode]) + } + + override protected def translateToPlanInternal( + tableEnv: StreamTableEnvironment): StreamTransformation[BaseRow] = { + + validateKeyTypes() + + val returnType = FlinkTypeFactory.toLogicalRowType(getRowType) + + val joinTranslator = StreamExecTemporalJoinToCoProcessTranslator.create( + this.toString, + tableEnv.getConfig, + returnType, + leftRel, + rightRel, + getJoinInfo, + cluster.getRexBuilder) + + val joinOperator = joinTranslator.getJoinOperator(joinType, returnType.getFieldNames) + val leftKeySelector = joinTranslator.getLeftKeySelector + val rightKeySelector = joinTranslator.getRightKeySelector + + val leftTransform = getInputNodes.get(0).translateToPlan(tableEnv) + .asInstanceOf[StreamTransformation[BaseRow]] + val rightTransform = getInputNodes.get(1).translateToPlan(tableEnv) + .asInstanceOf[StreamTransformation[BaseRow]] + + val ret = new TwoInputTransformation[BaseRow, BaseRow, BaseRow]( + leftTransform, + rightTransform, + getJoinOperatorName, + joinOperator, + BaseRowTypeInfo.of(returnType), + getResource.getParallelism) + + if (getResource.getMaxParallelism > 0) { + ret.setMaxParallelism(getResource.getMaxParallelism) + } + + // set KeyType and Selector for state + ret.setStateKeySelectors(leftKeySelector, rightKeySelector) + ret.setStateKeyType(leftKeySelector.asInstanceOf[ResultTypeQueryable[_]].getProducedType) + ret + } + + private def validateKeyTypes(): Unit = { + // at least one equality expression + val leftFields = left.getRowType.getFieldList + val rightFields = right.getRowType.getFieldList + + getJoinInfo.pairs().toList.foreach(pair => { + val leftKeyType = leftFields.get(pair.source).getType.getSqlTypeName + val rightKeyType = rightFields.get(pair.target).getType.getSqlTypeName + // check if keys are compatible + if (leftKeyType != rightKeyType) { + throw new TableException( + "Equality join predicate on incompatible types.\n" + + s"\tLeft: $left,\n" + + s"\tRight: $right,\n" + + s"\tCondition: (${RelExplainUtil.expressionToString( + getCondition, inputRowType, getExpressionString)})" + ) + } + }) + } + + private def getJoinOperatorName: String = { + val where = RelExplainUtil.expressionToString(getCondition, inputRowType, getExpressionString) + val select = getRowType.getFieldNames.mkString(", ") + s"TemporalTableJoin(where: ($where), select: ($select)" + } +} + + +/** + * @param rightTimeAttributeInputReference is defined only for event time joins. + */ +class StreamExecTemporalJoinToCoProcessTranslator private ( + textualRepresentation: String, + config: TableConfig, + returnType: RowType, + leftInputType: RowType, + rightInputType: RowType, + joinInfo: JoinInfo, + rexBuilder: RexBuilder, + leftTimeAttributeInputReference: Int, + rightTimeAttributeInputReference: Option[Int], + remainingNonEquiJoinPredicates: RexNode) { + + val nonEquiJoinPredicates: Option[RexNode] = Some(remainingNonEquiJoinPredicates) + + def getLeftKeySelector: BaseRowKeySelector = { + KeySelectorUtil.getBaseRowSelector( + joinInfo.leftKeys.toIntArray, + BaseRowTypeInfo.of(leftInputType) + ) + } + + def getRightKeySelector: BaseRowKeySelector = { + KeySelectorUtil.getBaseRowSelector( + joinInfo.rightKeys.toIntArray, + BaseRowTypeInfo.of(rightInputType) + ) + } + + def getJoinOperator( + joinType: JoinRelType, + returnFieldNames: Seq[String]): TwoInputStreamOperator[BaseRow, BaseRow, BaseRow] = { + + // input must not be nullable, because the runtime join function will make sure + // the code-generated function won't process null inputs + val ctx = CodeGeneratorContext(config) + val exprGenerator = new ExprCodeGenerator(ctx, nullableInput = false) + .bindInput(leftInputType) + .bindSecondInput(rightInputType) + + val body = if (nonEquiJoinPredicates.isEmpty) { + // only equality condition + "return true;" + } else { + val condition = exprGenerator.generateExpression(nonEquiJoinPredicates.get) + s""" + |${condition.code} + |return ${condition.resultTerm}; + |""".stripMargin + } + + val generatedJoinCondition = FunctionCodeGenerator.generateJoinCondition( + ctx, + "ConditionFunction", + body) + + createJoinOperator(config, joinType, generatedJoinCondition) + } + + protected def createJoinOperator( + tableConfig: TableConfig, + joinType: JoinRelType, + generatedJoinCondition: GeneratedJoinCondition) + : TwoInputStreamOperator[BaseRow, BaseRow, BaseRow] = { + + val minRetentionTime = tableConfig.getMinIdleStateRetentionTime Review comment: Put these two variables to `new TemporalProcessTimeJoinOperator` block? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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