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[CARMEL-6113] Support BHJ fallback to SMJ in AQE (#1042)
* [CARMEL-6113] Support BHJ fallback to SMJ in AQE * fix code style * Add log if FallbackBroadcastStage takes effect
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26 changes: 26 additions & 0 deletions
26
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlException.scala
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,26 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.spark.sql.execution | ||
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| import org.apache.spark.SparkException | ||
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| /** | ||
| * Exception thrown when the table cannot be broadcast. | ||
| */ | ||
| private[spark] case class CannotBroadcastTableException(message: String) | ||
| extends SparkException(message) |
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83 changes: 83 additions & 0 deletions
83
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/FallbackBroadcastStage.scala
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.spark.sql.execution.adaptive | ||
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| import org.apache.spark.internal.Logging | ||
| import org.apache.spark.sql.catalyst.planning.ExtractEquiJoinKeys | ||
| import org.apache.spark.sql.catalyst.plans.logical.{HintInfo, Join, LogicalPlan, NO_BROADCAST_HASH} | ||
|
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| /** | ||
| * This fallback handler detects stage that has been proved cannot be broadcast and | ||
| * adds a no-broadcast-hash-join hint to avoid it being broadcast. | ||
| */ | ||
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| object FallbackBroadcastStage extends FallbackStageHandler with Logging { | ||
| override def apply(logicalPlan: LogicalPlan, stage: LogicalQueryStage): (LogicalPlan, Int) = { | ||
| var effectiveCount = 0 | ||
| val originLogicalQueryStage = stage match { | ||
| case LogicalQueryStage(l@LogicalQueryStage(_, _), _) => l | ||
| case _ => stage | ||
| } | ||
| val newLogicalPlan = logicalPlan.transformDown { | ||
| // case j@Join(left, _, _, _, hint) | ||
| case j @ ExtractEquiJoinKeys(_, _, _, _, left, _, hint) if left.sameResult(stage) || | ||
| left.sameResult(originLogicalQueryStage) => | ||
| var newHint = hint | ||
| if (!hint.leftHint.exists(_.strategy.isDefined)) { | ||
| newHint = newHint.copy(leftHint = | ||
| Some(hint.leftHint.getOrElse(HintInfo()).copy(strategy = Some(NO_BROADCAST_HASH)))) | ||
| } | ||
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| if (newHint.ne(hint)) { | ||
| effectiveCount = effectiveCount + 1 | ||
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| logInfo(s"FallbackBroadcastStage takes effect for " + | ||
| s"logicalPlan: $logicalPlan " + | ||
| s"stage: $stage") | ||
| j.copy(hint = newHint, left = if (left.sameResult(stage)) { | ||
| stage.logicalPlan | ||
| } else originLogicalQueryStage.logicalPlan) | ||
| } else { | ||
| j | ||
| } | ||
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| // case j@Join(_, right, _, _, hint) | ||
| case j @ ExtractEquiJoinKeys(_, _, _, _, _, right, hint) if right.sameResult(stage) || | ||
| right.sameResult(originLogicalQueryStage) => | ||
| var newHint = hint | ||
| if (!hint.rightHint.exists(_.strategy.isDefined)) { | ||
| newHint = newHint.copy(rightHint = | ||
| Some(hint.rightHint.getOrElse(HintInfo()).copy(strategy = Some(NO_BROADCAST_HASH)))) | ||
| } | ||
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| if (newHint.ne(hint)) { | ||
| effectiveCount = effectiveCount + 1 | ||
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| logInfo(s"FallbackBroadcastStage takes effect for " + | ||
| s"logicalPlan: $logicalPlan " + | ||
| s"stage: $stage") | ||
| j.copy(hint = newHint, right = if (right.sameResult(stage)) { | ||
| stage.logicalPlan | ||
| } else originLogicalQueryStage.logicalPlan) | ||
| } else { | ||
| j | ||
| } | ||
| } | ||
| (newLogicalPlan, effectiveCount) | ||
| } | ||
| } |
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