Github user lionelcao commented on a diff in the pull request: https://github.com/apache/incubator-carbondata/pull/625#discussion_r104578046 --- Diff: integration/spark2/src/main/scala/org/apache/carbondata/spark/CarbonFilters.scala --- @@ -1,397 +0,0 @@ -/* - * 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.carbondata.spark - -import scala.collection.mutable.ArrayBuffer - -import org.apache.spark.sql.catalyst.expressions._ -import org.apache.spark.sql.optimizer.AttributeReferenceWrapper -import org.apache.spark.sql.sources -import org.apache.spark.sql.types.StructType - -import org.apache.carbondata.core.metadata.datatype.DataType -import org.apache.carbondata.core.metadata.schema.table.CarbonTable -import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn -import org.apache.carbondata.core.scan.expression.{ColumnExpression => CarbonColumnExpression, Expression => CarbonExpression, LiteralExpression => CarbonLiteralExpression} -import org.apache.carbondata.core.scan.expression.conditional._ -import org.apache.carbondata.core.scan.expression.logical.{AndExpression, FalseExpression, OrExpression} -import org.apache.carbondata.spark.util.CarbonScalaUtil - -/** - * All filter conversions are done here. - */ -object CarbonFilters { - - /** - * Converts data sources filters to carbon filter predicates. - */ - def createCarbonFilter(schema: StructType, - predicate: sources.Filter): Option[CarbonExpression] = { - val dataTypeOf = schema.map(f => f.name -> f.dataType).toMap - - def createFilter(predicate: sources.Filter): Option[CarbonExpression] = { - predicate match { - - case sources.EqualTo(name, value) => - Some(new EqualToExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - case sources.Not(sources.EqualTo(name, value)) => - Some(new NotEqualsExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - - case sources.EqualNullSafe(name, value) => - Some(new EqualToExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - case sources.Not(sources.EqualNullSafe(name, value)) => - Some(new NotEqualsExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - - case sources.GreaterThan(name, value) => - Some(new GreaterThanExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - case sources.LessThan(name, value) => - Some(new LessThanExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - case sources.GreaterThanOrEqual(name, value) => - Some(new GreaterThanEqualToExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - case sources.LessThanOrEqual(name, value) => - Some(new LessThanEqualToExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, value))) - - case sources.In(name, values) => - Some(new InExpression(getCarbonExpression(name), - new ListExpression( - convertToJavaList(values.map(f => getCarbonLiteralExpression(name, f)).toList)))) - case sources.Not(sources.In(name, values)) => - Some(new NotInExpression(getCarbonExpression(name), - new ListExpression( - convertToJavaList(values.map(f => getCarbonLiteralExpression(name, f)).toList)))) - - case sources.IsNull(name) => - Some(new EqualToExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, null), true)) - case sources.IsNotNull(name) => - Some(new NotEqualsExpression(getCarbonExpression(name), - getCarbonLiteralExpression(name, null), true)) - case sources.And(lhs, rhs) => - (createFilter(lhs) ++ createFilter(rhs)).reduceOption(new AndExpression(_, _)) - - case sources.Or(lhs, rhs) => - for { - lhsFilter <- createFilter(lhs) - rhsFilter <- createFilter(rhs) - } yield { - new OrExpression(lhsFilter, rhsFilter) - } - - case _ => None - } - } - - def getCarbonExpression(name: String) = { - new CarbonColumnExpression(name, - CarbonScalaUtil.convertSparkToCarbonDataType(dataTypeOf(name))) - } - - def getCarbonLiteralExpression(name: String, value: Any): CarbonExpression = { - new CarbonLiteralExpression(value, - CarbonScalaUtil.convertSparkToCarbonDataType(dataTypeOf(name))) - } - - createFilter(predicate) - } - - - // Check out which filters can be pushed down to carbon, remaining can be handled in spark layer. - // Mostly dimension filters are only pushed down since it is faster in carbon. - def selectFilters(filters: Seq[Expression], - attrList: java.util.HashSet[AttributeReferenceWrapper], - aliasMap: CarbonAliasDecoderRelation): Unit = { - def translate(expr: Expression, or: Boolean = false): Option[sources.Filter] = { - expr match { - case or@ Or(left, right) => - - val leftFilter = translate(left, or = true) - val rightFilter = translate(right, or = true) - if (leftFilter.isDefined && rightFilter.isDefined) { - Some( sources.Or(leftFilter.get, rightFilter.get)) - } else { - or.collect { - case attr: AttributeReference => - attrList.add(AttributeReferenceWrapper(aliasMap.getOrElse(attr, attr))) - } - None - } - - case And(left, right) => - (translate(left) ++ translate(right)).reduceOption(sources.And) - - case EqualTo(a: Attribute, Literal(v, t)) => - Some(sources.EqualTo(a.name, v)) - case EqualTo(l@Literal(v, t), a: Attribute) => - Some(sources.EqualTo(a.name, v)) - case EqualTo(Cast(a: Attribute, _), Literal(v, t)) => - Some(sources.EqualTo(a.name, v)) - case EqualTo(Literal(v, t), Cast(a: Attribute, _)) => - Some(sources.EqualTo(a.name, v)) - - case Not(EqualTo(a: Attribute, Literal(v, t))) => - Some(sources.Not(sources.EqualTo(a.name, v))) - case Not(EqualTo(Literal(v, t), a: Attribute)) => - Some(sources.Not(sources.EqualTo(a.name, v))) - case Not(EqualTo(Cast(a: Attribute, _), Literal(v, t))) => - Some(sources.Not(sources.EqualTo(a.name, v))) - case Not(EqualTo(Literal(v, t), Cast(a: Attribute, _))) => - Some(sources.Not(sources.EqualTo(a.name, v))) - case IsNotNull(a: Attribute) => Some(sources.IsNotNull(a.name)) - case IsNull(a: Attribute) => Some(sources.IsNull(a.name)) - case Not(In(a: Attribute, list)) if !list.exists(!_.isInstanceOf[Literal]) => - val hSet = list.map(e => e.eval(EmptyRow)) - Some(sources.Not(sources.In(a.name, hSet.toArray))) - case In(a: Attribute, list) if !list.exists(!_.isInstanceOf[Literal]) => - val hSet = list.map(e => e.eval(EmptyRow)) - Some(sources.In(a.name, hSet.toArray)) - case Not(In(Cast(a: Attribute, _), list)) - if !list.exists(!_.isInstanceOf[Literal]) => - val hSet = list.map(e => e.eval(EmptyRow)) - Some(sources.Not(sources.In(a.name, hSet.toArray))) - case In(Cast(a: Attribute, _), list) if !list.exists(!_.isInstanceOf[Literal]) => - val hSet = list.map(e => e.eval(EmptyRow)) - Some(sources.In(a.name, hSet.toArray)) - - case GreaterThan(a: Attribute, Literal(v, t)) => - Some(sources.GreaterThan(a.name, v)) - case GreaterThan(Literal(v, t), a: Attribute) => - Some(sources.LessThan(a.name, v)) - case GreaterThan(Cast(a: Attribute, _), Literal(v, t)) => - Some(sources.GreaterThan(a.name, v)) - case GreaterThan(Literal(v, t), Cast(a: Attribute, _)) => - Some(sources.LessThan(a.name, v)) - - case LessThan(a: Attribute, Literal(v, t)) => - Some(sources.LessThan(a.name, v)) - case LessThan(Literal(v, t), a: Attribute) => - Some(sources.GreaterThan(a.name, v)) - case LessThan(Cast(a: Attribute, _), Literal(v, t)) => - Some(sources.LessThan(a.name, v)) - case LessThan(Literal(v, t), Cast(a: Attribute, _)) => - Some(sources.GreaterThan(a.name, v)) - - case GreaterThanOrEqual(a: Attribute, Literal(v, t)) => - Some(sources.GreaterThanOrEqual(a.name, v)) - case GreaterThanOrEqual(Literal(v, t), a: Attribute) => - Some(sources.LessThanOrEqual(a.name, v)) - case GreaterThanOrEqual(Cast(a: Attribute, _), Literal(v, t)) => - Some(sources.GreaterThanOrEqual(a.name, v)) - case GreaterThanOrEqual(Literal(v, t), Cast(a: Attribute, _)) => - Some(sources.LessThanOrEqual(a.name, v)) - - case LessThanOrEqual(a: Attribute, Literal(v, t)) => - Some(sources.LessThanOrEqual(a.name, v)) - case LessThanOrEqual(Literal(v, t), a: Attribute) => - Some(sources.GreaterThanOrEqual(a.name, v)) - case LessThanOrEqual(Cast(a: Attribute, _), Literal(v, t)) => - Some(sources.LessThanOrEqual(a.name, v)) - case LessThanOrEqual(Literal(v, t), Cast(a: Attribute, _)) => - Some(sources.GreaterThanOrEqual(a.name, v)) - - case others => - if (!or) { - others.collect { - case attr: AttributeReference => - attrList.add(AttributeReferenceWrapper(aliasMap.getOrElse(attr, attr))) - } - } - None - } - } - filters.flatMap(translate(_)).toArray - } - - def processExpression(exprs: Seq[Expression], - attributesNeedToDecode: java.util.HashSet[AttributeReference], - unprocessedExprs: ArrayBuffer[Expression], - carbonTable: CarbonTable): Option[CarbonExpression] = { - def transformExpression(expr: Expression, or: Boolean = false): Option[CarbonExpression] = { - expr match { - case or@ Or(left, right) => - val leftFilter = transformExpression(left, or = true) --- End diff -- transformExpression(left, or = true) equals to transformExpression(left, true) here.
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