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optimize and filter by move equal conditions ahead
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Jan 13, 2025
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96 changes: 96 additions & 0 deletions
96
...c/main/scala/org/apache/gluten/extension/columnar/MoveAndFilterEqualConditionsAhead.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * 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.gluten.extension.columnar | ||
|
|
||
| import org.apache.gluten.backendsapi.BackendsApiManager | ||
| import org.apache.gluten.config.GlutenConfig | ||
| import org.apache.gluten.execution.FilterExecTransformerBase | ||
|
|
||
| import org.apache.spark.sql.SparkSession | ||
| import org.apache.spark.sql.catalyst.expressions.{And, Attribute, Cast, EqualNullSafe, EqualTo, Expression, Literal} | ||
| import org.apache.spark.sql.catalyst.rules.Rule | ||
| import org.apache.spark.sql.execution.SparkPlan | ||
|
|
||
| /** | ||
| * Rewrite `and` filter conditions, move the equal conditions ahead. e.g. `cast(b as string) != '' | ||
| * and a = 1` => `a = 1 and cast(b as string) != ''` | ||
| */ | ||
| case class MoveAndFilterEqualConditionsAhead(spark: SparkSession) extends Rule[SparkPlan] { | ||
| override def apply(plan: SparkPlan): SparkPlan = { | ||
| if (GlutenConfig.get.enableMoveAndFilterEqualConditionsAhead) { | ||
| optimize(plan) | ||
| } else { | ||
| plan | ||
| } | ||
| } | ||
|
|
||
| private def optimize(plan: SparkPlan): SparkPlan = { | ||
| plan match { | ||
| case f: FilterExecTransformerBase if f.cond.isInstanceOf[And] => | ||
| val newCond = optimize(f.cond) | ||
| BackendsApiManager.getSparkPlanExecApiInstance.genFilterExecTransformer(newCond, f.child) | ||
| case _ => | ||
| val newChildren = plan.children.map(p => optimize(p)) | ||
| plan.withNewChildren(newChildren) | ||
| } | ||
| } | ||
|
|
||
| private def optimize(expr: Expression): Expression = expr match { | ||
| case a: And => | ||
| if (isEqualCondition(a.right)) { | ||
| val newLeft = optimize(a.left) | ||
| val newRight = optimize(a.right) | ||
| val newExpr = And(newRight, newLeft) | ||
| newExpr | ||
| } else { | ||
| val newLeft = optimize(a.left) | ||
| val newRight = optimize(a.right) | ||
| val newExpr = And(newLeft, newRight) | ||
| newExpr | ||
| } | ||
| case _ => expr | ||
| } | ||
|
|
||
| private def isEqualCondition(expr: Expression): Boolean = { | ||
| var leftExpr = null.asInstanceOf[Expression] | ||
| var rightExpr = null.asInstanceOf[Expression] | ||
| expr match { | ||
| case e: EqualTo => leftExpr = e.left; rightExpr = e.right | ||
| case e: EqualNullSafe => leftExpr = e.left; rightExpr = e.right | ||
| case _ => | ||
| return false | ||
| } | ||
| if (leftExpr == null || rightExpr == null) { | ||
| return false | ||
| } | ||
| def f(left: Expression, right: Expression): Boolean = { | ||
| left match { | ||
| case _: Attribute => | ||
| right match { | ||
| case _: Literal => | ||
| return true | ||
| case c: Cast if c.child.isInstanceOf[Literal] => | ||
| return true | ||
| case _ => | ||
| } | ||
| case _ => | ||
| } | ||
| false | ||
| } | ||
| f(leftExpr, rightExpr) || f(rightExpr, leftExpr) | ||
| } | ||
| } |
78 changes: 0 additions & 78 deletions
78
.../src/main/scala/org/apache/gluten/extension/columnar/MoveEqualConditionsAheadForAnd.scala
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