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210
sql/core/src/main/scala/org/apache/spark/sql/Column.scala
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| /* | ||
| * 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 | ||
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| import org.apache.spark.sql.catalyst.analysis | ||
| import org.apache.spark.sql.catalyst.analysis.Star | ||
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| import scala.language.implicitConversions | ||
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| import org.apache.spark.sql.catalyst.expressions._ | ||
| import org.apache.spark.sql.catalyst.expressions.{Literal => LiteralExpr} | ||
| import org.apache.spark.sql.catalyst.plans.logical.{Project, LogicalPlan} | ||
| import org.apache.spark.sql.types._ | ||
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| object Literal { | ||
| def apply(literal: Boolean): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Byte): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Short): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Int): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Long): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Float): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Double): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: String): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: BigDecimal): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: java.math.BigDecimal): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: java.sql.Timestamp): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: java.sql.Date): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Array[Byte]): Column = new Column(LiteralExpr(literal)) | ||
| def apply(literal: Null): Column = new Column(LiteralExpr(null)) | ||
| } | ||
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| object Column { | ||
| def unapply(col: Column): Option[Expression] = Some(col.expr) | ||
| } | ||
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| class Column( | ||
| sqlContext: Option[SQLContext], | ||
| plan: Option[LogicalPlan], | ||
| val expr: Expression) | ||
| extends DataFrame(sqlContext, plan) with ExpressionApi[Column] { | ||
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| def this(expr: Expression) = this(None, None, expr) | ||
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| def this(name: String) = this(name match { | ||
| case "*" => Star(None) | ||
| case _ if name.endsWith(".*") => Star(Some(name.substring(0, name.length - 2))) | ||
| case _ => analysis.UnresolvedAttribute(name) | ||
| }) | ||
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| private[this] implicit def toColumn(expr: Expression): Column = { | ||
| val projectedPlan = plan.map { p => | ||
| Project(Seq(expr match { | ||
| case named: NamedExpression => named | ||
| case unnamed: Expression => Alias(unnamed, "col")() | ||
| }), p) | ||
| } | ||
| new Column(sqlContext, projectedPlan, expr) | ||
| } | ||
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| override def unary_- : Column = UnaryMinus(expr) | ||
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| override def ||(other: Column): Column = Or(expr, other.expr) | ||
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| override def unary_~ : Column = BitwiseNot(expr) | ||
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| override def !==(other: Column): Column = Not(EqualTo(expr, other.expr)) | ||
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| override def >(other: Column): Column = GreaterThan(expr, other.expr) | ||
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| override def unary_! : Column = Not(expr) | ||
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| override def &(other: Column): Column = BitwiseAnd(expr, other.expr) | ||
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| override def /(other: Column): Column = Divide(expr, other.expr) | ||
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| override def &&(other: Column): Column = And(expr, other.expr) | ||
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| override def |(other: Column): Column = BitwiseOr(expr, other.expr) | ||
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| override def ^(other: Column): Column = BitwiseXor(expr, other.expr) | ||
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| override def <=>(other: Column): Column = EqualNullSafe(expr, other.expr) | ||
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| override def ===(other: Column): Column = EqualTo(expr, other.expr) | ||
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| override def equalTo(other: Column): Column = this === other | ||
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| override def +(other: Column): Column = Add(expr, other.expr) | ||
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| override def rlike(other: Column): Column = RLike(expr, other.expr) | ||
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| override def %(other: Column): Column = Remainder(expr, other.expr) | ||
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| override def in(list: Column*): Column = In(expr, list.map(_.expr)) | ||
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| override def getItem(ordinal: Int): Column = GetItem(expr, LiteralExpr(ordinal)) | ||
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| override def getItem(ordinal: Column): Column = GetItem(expr, ordinal.expr) | ||
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| override def <=(other: Column): Column = LessThanOrEqual(expr, other.expr) | ||
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| override def like(other: Column): Column = Like(expr, other.expr) | ||
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| override def getField(fieldName: String): Column = GetField(expr, fieldName) | ||
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| override def isNotNull: Column = IsNotNull(expr) | ||
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| override def substr(startPos: Column, len: Column): Column = | ||
| Substring(expr, startPos.expr, len.expr) | ||
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| override def <(other: Column): Column = LessThan(expr, other.expr) | ||
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| override def isNull: Column = IsNull(expr) | ||
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| override def contains(other: Column): Column = Contains(expr, other.expr) | ||
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| override def -(other: Column): Column = Subtract(expr, other.expr) | ||
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| override def desc: Column = SortOrder(expr, Descending) | ||
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| override def >=(other: Column): Column = GreaterThanOrEqual(expr, other.expr) | ||
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| override def asc: Column = SortOrder(expr, Ascending) | ||
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| override def endsWith(other: Column): Column = EndsWith(expr, other.expr) | ||
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| override def *(other: Column): Column = Multiply(expr, other.expr) | ||
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| override def startsWith(other: Column): Column = StartsWith(expr, other.expr) | ||
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| override def as(alias: String): Column = Alias(expr, alias)() | ||
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| override def cast(to: DataType): Column = Cast(expr, to) | ||
| } | ||
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| class ColumnName(name: String) extends Column(name) { | ||
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| /** Creates a new AttributeReference of type boolean */ | ||
| def boolean: StructField = StructField(name, BooleanType) | ||
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| /** Creates a new AttributeReference of type byte */ | ||
| def byte: StructField = StructField(name, ByteType) | ||
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| /** Creates a new AttributeReference of type short */ | ||
| def short: StructField = StructField(name, ShortType) | ||
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| /** Creates a new AttributeReference of type int */ | ||
| def int: StructField = StructField(name, IntegerType) | ||
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| /** Creates a new AttributeReference of type long */ | ||
| def long: StructField = StructField(name, LongType) | ||
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| /** Creates a new AttributeReference of type float */ | ||
| def float: StructField = StructField(name, FloatType) | ||
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| /** Creates a new AttributeReference of type double */ | ||
| def double: StructField = StructField(name, DoubleType) | ||
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| /** Creates a new AttributeReference of type string */ | ||
| def string: StructField = StructField(name, StringType) | ||
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| /** Creates a new AttributeReference of type date */ | ||
| def date: StructField = StructField(name, DateType) | ||
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| /** Creates a new AttributeReference of type decimal */ | ||
| def decimal: StructField = StructField(name, DecimalType.Unlimited) | ||
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| /** Creates a new AttributeReference of type decimal */ | ||
| def decimal(precision: Int, scale: Int): StructField = | ||
| StructField(name, DecimalType(precision, scale)) | ||
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| /** Creates a new AttributeReference of type timestamp */ | ||
| def timestamp: StructField = StructField(name, TimestampType) | ||
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| /** Creates a new AttributeReference of type binary */ | ||
| def binary: StructField = StructField(name, BinaryType) | ||
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| /** Creates a new AttributeReference of type array */ | ||
| def array(dataType: DataType): StructField = StructField(name, ArrayType(dataType)) | ||
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| /** Creates a new AttributeReference of type map */ | ||
| def map(keyType: DataType, valueType: DataType): StructField = | ||
| map(MapType(keyType, valueType)) | ||
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| def map(mapType: MapType): StructField = StructField(name, mapType) | ||
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| /** Creates a new AttributeReference of type struct */ | ||
| def struct(fields: StructField*): StructField = struct(StructType(fields)) | ||
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| def struct(structType: StructType): StructField = StructField(name, structType) | ||
| } |
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