[SPARK-4508] [SQL] build native date type to conform behavior to Hive

sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala

@@ -20,7 +20,7 @@ package org.apache.spark.sql
 import scala.util.hashing.MurmurHash3
 
 import org.apache.spark.sql.catalyst.expressions.GenericRow
-
+import org.apache.spark.sql.types.DateUtils
 
 object Row {
   /**

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala

@@ -17,14 +17,13 @@
 
 package org.apache.spark.sql.catalyst
 
-import java.sql.{Date, Timestamp}
+import java.sql.Timestamp
 
 import org.apache.spark.util.Utils
 import org.apache.spark.sql.catalyst.expressions.{GenericRow, Attribute, AttributeReference, Row}
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
 import org.apache.spark.sql.types._
 
-
 /**
  * A default version of ScalaReflection that uses the runtime universe.
  */
@@ -67,6 +66,7 @@ trait ScalaReflection {
         }.toArray)
     case (d: BigDecimal, _) => Decimal(d)
     case (d: java.math.BigDecimal, _) => Decimal(d)
+    case (d: java.sql.Date, _) => DateUtils.fromJavaDate(d)
     case (other, _) => other
   }
 
@@ -80,6 +80,7 @@ trait ScalaReflection {
     }
     case (r: Row, s: StructType) => convertRowToScala(r, s)
     case (d: Decimal, _: DecimalType) => d.toJavaBigDecimal
+    case (i: Int, DateType) => DateUtils.toJavaDate(i)
     case (other, _) => other
   }
 
@@ -152,7 +153,7 @@ trait ScalaReflection {
           valueDataType, valueContainsNull = valueNullable), nullable = true)
       case t if t <:< typeOf[String] => Schema(StringType, nullable = true)
       case t if t <:< typeOf[Timestamp] => Schema(TimestampType, nullable = true)
-      case t if t <:< typeOf[Date] => Schema(DateType, nullable = true)
+      case t if t <:< typeOf[java.sql.Date] => Schema(DateType, nullable = true)
       case t if t <:< typeOf[BigDecimal] => Schema(DecimalType.Unlimited, nullable = true)
       case t if t <:< typeOf[java.math.BigDecimal] => Schema(DecimalType.Unlimited, nullable = true)
       case t if t <:< typeOf[Decimal] => Schema(DecimalType.Unlimited, nullable = true)
@@ -184,7 +185,7 @@ trait ScalaReflection {
     case obj: LongType.JvmType => LongType
     case obj: FloatType.JvmType => FloatType
     case obj: DoubleType.JvmType => DoubleType
-    case obj: DateType.JvmType => DateType
+    case obj: java.sql.Date => DateType
     case obj: java.math.BigDecimal => DecimalType.Unlimited
     case obj: Decimal => DecimalType.Unlimited
     case obj: TimestampType.JvmType => TimestampType

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala

@@ -51,6 +51,7 @@ class SqlParser extends AbstractSparkSQLParser {
   protected val CASE = Keyword("CASE")
   protected val CAST = Keyword("CAST")
   protected val COUNT = Keyword("COUNT")
+  protected val DATE = Keyword("DATE")
   protected val DECIMAL = Keyword("DECIMAL")
   protected val DESC = Keyword("DESC")
   protected val DISTINCT = Keyword("DISTINCT")
@@ -381,6 +382,7 @@ class SqlParser extends AbstractSparkSQLParser {
     | DOUBLE ^^^ DoubleType
     | fixedDecimalType
     | DECIMAL ^^^ DecimalType.Unlimited
+    | DATE ^^^ DateType
     )
 
   protected lazy val fixedDecimalType: Parser[DataType] =

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala

@@ -113,7 +113,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
   // UDFToString
   private[this] def castToString(from: DataType): Any => Any = from match {
     case BinaryType => buildCast[Array[Byte]](_, new String(_, "UTF-8"))
-    case DateType => buildCast[Date](_, dateToString)
+    case DateType => buildCast[Int](_, d => DateUtils.toString(d))
     case TimestampType => buildCast[Timestamp](_, timestampToString)
     case _ => buildCast[Any](_, _.toString)
   }
@@ -131,7 +131,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
       buildCast[Timestamp](_, t => t.getTime() != 0 || t.getNanos() != 0)
     case DateType =>
       // Hive would return null when cast from date to boolean
-      buildCast[Date](_, d => null)
+      buildCast[Int](_, d => null)
     case LongType =>
       buildCast[Long](_, _ != 0)
     case IntegerType =>
@@ -171,7 +171,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case ByteType =>
       buildCast[Byte](_, b => new Timestamp(b))
     case DateType =>
-      buildCast[Date](_, d => new Timestamp(d.getTime))
+      buildCast[Int](_, d => new Timestamp(DateUtils.toJavaDate(d).getTime))
     // TimestampWritable.decimalToTimestamp
     case DecimalType() =>
       buildCast[Decimal](_, d => decimalToTimestamp(d))
@@ -224,37 +224,24 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     }
   }
 
-  // Converts Timestamp to string according to Hive TimestampWritable convention
-  private[this] def timestampToDateString(ts: Timestamp): String = {
-    Cast.threadLocalDateFormat.get.format(ts)
-  }
-
   // DateConverter
   private[this] def castToDate(from: DataType): Any => Any = from match {
     case StringType =>
       buildCast[String](_, s =>
-        try Date.valueOf(s) catch { case _: java.lang.IllegalArgumentException => null })
+        try DateUtils.fromJavaDate(Date.valueOf(s))
+        catch { case _: java.lang.IllegalArgumentException => null }
+      )
     case TimestampType =>
       // throw valid precision more than seconds, according to Hive.
       // Timestamp.nanos is in 0 to 999,999,999, no more than a second.
-      buildCast[Timestamp](_, t => new Date(Math.floor(t.getTime / 1000.0).toLong * 1000))
+      buildCast[Timestamp](_, t => DateUtils.millisToDays(t.getTime))
     // Hive throws this exception as a Semantic Exception
-    // It is never possible to compare result when hive return with exception, so we can return null
+    // It is never possible to compare result when hive return with exception,
+    // so we can return null
     // NULL is more reasonable here, since the query itself obeys the grammar.
     case _ => _ => null
   }
 
-  // Date cannot be cast to long, according to hive
-  private[this] def dateToLong(d: Date) = null
-
-  // Date cannot be cast to double, according to hive
-  private[this] def dateToDouble(d: Date) = null
-
-  // Converts Date to string according to Hive DateWritable convention
-  private[this] def dateToString(d: Date): String = {
-    Cast.threadLocalDateFormat.get.format(d)
-  }
-
   // LongConverter
   private[this] def castToLong(from: DataType): Any => Any = from match {
     case StringType =>
@@ -264,7 +251,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1L else 0L)
     case DateType =>
-      buildCast[Date](_, d => dateToLong(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToLong(t))
     case x: NumericType =>
@@ -280,7 +267,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1 else 0)
     case DateType =>
-      buildCast[Date](_, d => dateToLong(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToLong(t).toInt)
     case x: NumericType =>
@@ -296,7 +283,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1.toShort else 0.toShort)
     case DateType =>
-      buildCast[Date](_, d => dateToLong(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToLong(t).toShort)
     case x: NumericType =>
@@ -312,7 +299,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1.toByte else 0.toByte)
     case DateType =>
-      buildCast[Date](_, d => dateToLong(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToLong(t).toByte)
     case x: NumericType =>
@@ -342,7 +329,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => changePrecision(if (b) Decimal(1) else Decimal(0), target))
     case DateType =>
-      buildCast[Date](_, d => null) // date can't cast to decimal in Hive
+      buildCast[Int](_, d => null) // date can't cast to decimal in Hive
     case TimestampType =>
       // Note that we lose precision here.
       buildCast[Timestamp](_, t => changePrecision(Decimal(timestampToDouble(t)), target))
@@ -367,7 +354,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1d else 0d)
     case DateType =>
-      buildCast[Date](_, d => dateToDouble(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToDouble(t))
     case x: NumericType =>
@@ -383,7 +370,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
     case BooleanType =>
       buildCast[Boolean](_, b => if (b) 1f else 0f)
     case DateType =>
-      buildCast[Date](_, d => dateToDouble(d))
+      buildCast[Int](_, d => null)
     case TimestampType =>
       buildCast[Timestamp](_, t => timestampToDouble(t).toFloat)
     case x: NumericType =>
@@ -442,16 +429,16 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
 
 object Cast {
   // `SimpleDateFormat` is not thread-safe.
-  private[sql] val threadLocalDateFormat = new ThreadLocal[DateFormat] {
+  private[sql] val threadLocalTimestampFormat = new ThreadLocal[DateFormat] {
     override def initialValue() = {
-      new SimpleDateFormat("yyyy-MM-dd")
+      new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
     }
   }
 
   // `SimpleDateFormat` is not thread-safe.
-  private[sql] val threadLocalTimestampFormat = new ThreadLocal[DateFormat] {
+  private[sql] val threadLocalDateFormat = new ThreadLocal[DateFormat] {
     override def initialValue() = {
-      new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
+      new SimpleDateFormat("yyyy-MM-dd")
     }
   }
 }

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala

@@ -246,6 +246,9 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
               new String(${eval.primitiveTerm}.asInstanceOf[Array[Byte]])
         """.children
 
+      case Cast(child @ DateType(), StringType) =>
+        child.castOrNull(c => q"org.apache.spark.sql.types.DateUtils.toString($c)", StringType)
+
       case Cast(child @ NumericType(), IntegerType) =>
         child.castOrNull(c => q"$c.toInt", IntegerType)
 

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala

@@ -35,7 +35,7 @@ object Literal {
     case d: java.math.BigDecimal => Literal(Decimal(d), DecimalType.Unlimited)
     case d: Decimal => Literal(d, DecimalType.Unlimited)
     case t: Timestamp => Literal(t, TimestampType)
-    case d: Date => Literal(d, DateType)
+    case d: Date => Literal(DateUtils.fromJavaDate(d), DateType)
     case a: Array[Byte] => Literal(a, BinaryType)
     case null => Literal(null, NullType)
   }

sql/catalyst/src/main/scala/org/apache/spark/sql/types/DateUtils.scala

@@ -0,0 +1,60 @@
+/*
+ * 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.spark.sql.types
+
+import java.sql.Date
+import java.util.{Calendar, TimeZone}
+
+import org.apache.spark.sql.catalyst.expressions.Cast
+
+/**
+ * helper function to convert between Int value of days since 1970-01-01 and java.sql.Date
+ */
+object DateUtils {
+  private val MILLIS_PER_DAY = 86400000
+
+  // Java TimeZone has no mention of thread safety. Use thread local instance to be safe.
+  private val LOCAL_TIMEZONE = new ThreadLocal[TimeZone] {
+    override protected def initialValue: TimeZone = {
+      Calendar.getInstance.getTimeZone
+    }
+  }
+
+  private def javaDateToDays(d: Date): Int = {
+    millisToDays(d.getTime)
+  }
+
+  def millisToDays(millisLocal: Long): Int = {
+    ((millisLocal + LOCAL_TIMEZONE.get().getOffset(millisLocal)) / MILLIS_PER_DAY).toInt
+  }
+
+  private def toMillisSinceEpoch(days: Int): Long = {
+    val millisUtc = days.toLong * MILLIS_PER_DAY
+    millisUtc - LOCAL_TIMEZONE.get().getOffset(millisUtc)
+  }
+
+  def fromJavaDate(date: java.sql.Date): Int = {
+    javaDateToDays(date)
+  }
+
+  def toJavaDate(daysSinceEpoch: Int): java.sql.Date = {
+    new java.sql.Date(toMillisSinceEpoch(daysSinceEpoch))
+  }
+
+  def toString(days: Int): String = Cast.threadLocalDateFormat.get.format(toJavaDate(days))
+}

sql/catalyst/src/main/scala/org/apache/spark/sql/types/dataTypes.scala

@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.types
 
-import java.sql.{Date, Timestamp}
+import java.sql.Timestamp
 
 import scala.math.Numeric.{FloatAsIfIntegral, DoubleAsIfIntegral}
 import scala.reflect.ClassTag
@@ -387,18 +387,16 @@ case object TimestampType extends NativeType {
  */
 @DeveloperApi
 case object DateType extends NativeType {
-  private[sql] type JvmType = Date
+  private[sql] type JvmType = Int
 
   @transient private[sql] lazy val tag = ScalaReflectionLock.synchronized { typeTag[JvmType] }
 
-  private[sql] val ordering = new Ordering[JvmType] {
-    def compare(x: Date, y: Date) = x.compareTo(y)
-  }
+  private[sql] val ordering = implicitly[Ordering[JvmType]]
 
   /**
-   * The default size of a value of the DateType is 8 bytes.
+   * The default size of a value of the DateType is 4 bytes.
    */
-  override def defaultSize: Int = 8
+  override def defaultSize: Int = 4
 }