Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/625#discussion_r104424526
--- 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
--- End diff --
The below code is different with spark-common's CarbonFilter.scala, please
consider if need to keep consistent.
`filters.flatMap(translate(_, false)).toArray`
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