[SPARK-7199] [SQL] Add date and timestamp support to UnsafeRow

JIRA: https://issues.apache.org/jira/browse/SPARK-7199

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #5984 from viirya/add_date_timestamp and squashes the following commits:

7f21ce9 [Liang-Chi Hsieh] For comment.
0b89698 [Liang-Chi Hsieh] Add timestamp to settableFieldTypes.
c30d490 [Liang-Chi Hsieh] Use default IntUnsafeColumnWriter and LongUnsafeColumnWriter.
672ef17 [Liang-Chi Hsieh] Remove getter/setter for Date and Timestamp and use Int and Long for them.
9f3e577 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into add_date_timestamp
281e844 [Liang-Chi Hsieh] Fix scala style.
fb532b5 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into add_date_timestamp
80af342 [Liang-Chi Hsieh] Fix compiling error.
f4f5de6 [Liang-Chi Hsieh] Fix scala style.
a463e83 [Liang-Chi Hsieh] Use Long to store timestamp for rows.
635388a [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into add_date_timestamp
46946c6 [Liang-Chi Hsieh] Adapt for moved DateUtils.
b16994e [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into add_date_timestamp
752251f [Liang-Chi Hsieh] Support setDate. Fix failed test.
fcf8db9 [Liang-Chi Hsieh] Add functions for Date and Timestamp to SpecificRow.
e42a809 [Liang-Chi Hsieh] Fix style.
4c07b57 [Liang-Chi Hsieh] Add date and timestamp support to UnsafeRow.

sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java

@@ -103,7 +103,9 @@ public final class UnsafeRow extends BaseMutableRow {
           IntegerType,
           LongType,
           FloatType,
-          DoubleType
+          DoubleType,
+          DateType,
+          TimestampType
     })));
 
     // We support get() on a superset of the types for which we support set():
@@ -331,8 +333,6 @@ public final class UnsafeRow extends BaseMutableRow {
     return getUTF8String(i).toString();
   }
 
-
-
   @Override
   public InternalRow copy() {
     throw new UnsupportedOperationException();

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

@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import org.apache.spark.sql.catalyst.util.DateUtils
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.PlatformDependent
 import org.apache.spark.unsafe.array.ByteArrayMethods
@@ -120,6 +122,8 @@ private object UnsafeColumnWriter {
       case FloatType => FloatUnsafeColumnWriter
       case DoubleType => DoubleUnsafeColumnWriter
       case StringType => StringUnsafeColumnWriter
+      case DateType => IntUnsafeColumnWriter
+      case TimestampType => LongUnsafeColumnWriter
       case t =>
         throw new UnsupportedOperationException(s"Do not know how to write columns of type $t")
     }

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

@@ -197,9 +197,10 @@ class GenericMutableRow(v: Array[Any]) extends GenericRow(v) with MutableRow {
   override def setFloat(ordinal: Int, value: Float): Unit = { values(ordinal) = value }
   override def setInt(ordinal: Int, value: Int): Unit = { values(ordinal) = value }
   override def setLong(ordinal: Int, value: Long): Unit = { values(ordinal) = value }
-  override def setString(ordinal: Int, value: String) {
+  override def setString(ordinal: Int, value: String): Unit = {
     values(ordinal) = UTF8String.fromString(value)
   }
+
   override def setNullAt(i: Int): Unit = { values(i) = null }
 
   override def setShort(ordinal: Int, value: Short): Unit = { values(ordinal) = value }

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala

@@ -17,12 +17,14 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import java.sql.{Date, Timestamp}
 import java.util.Arrays
 
 import org.scalatest.Matchers
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.types._
+import org.apache.spark.sql.catalyst.util.DateUtils
 import org.apache.spark.unsafe.PlatformDependent
 import org.apache.spark.unsafe.array.ByteArrayMethods
 
@@ -74,6 +76,34 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     unsafeRow.getString(2) should be ("World")
   }
 
+  test("basic conversion with primitive, string, date and timestamp types") {
+    val fieldTypes: Array[DataType] = Array(LongType, StringType, DateType, TimestampType)
+    val converter = new UnsafeRowConverter(fieldTypes)
+
+    val row = new SpecificMutableRow(fieldTypes)
+    row.setLong(0, 0)
+    row.setString(1, "Hello")
+    row.update(2, DateUtils.fromJavaDate(Date.valueOf("1970-01-01")))
+    row.update(3, DateUtils.fromJavaTimestamp(Timestamp.valueOf("2015-05-08 08:10:25")))
+
+    val sizeRequired: Int = converter.getSizeRequirement(row)
+    sizeRequired should be (8 + (8 * 4) +
+      ByteArrayMethods.roundNumberOfBytesToNearestWord("Hello".getBytes.length + 8))
+    val buffer: Array[Long] = new Array[Long](sizeRequired / 8)
+    val numBytesWritten = converter.writeRow(row, buffer, PlatformDependent.LONG_ARRAY_OFFSET)
+    numBytesWritten should be (sizeRequired)
+
+    val unsafeRow = new UnsafeRow()
+    unsafeRow.pointTo(buffer, PlatformDependent.LONG_ARRAY_OFFSET, fieldTypes.length, null)
+    unsafeRow.getLong(0) should be (0)
+    unsafeRow.getString(1) should be ("Hello")
+    // Date is represented as Int in unsafeRow
+    DateUtils.toJavaDate(unsafeRow.getInt(2)) should be (Date.valueOf("1970-01-01"))
+    // Timestamp is represented as Long in unsafeRow
+    DateUtils.toJavaTimestamp(unsafeRow.getLong(3)) should be
+      (Timestamp.valueOf("2015-05-08 08:10:25"))
+  }
+
   test("null handling") {
     val fieldTypes: Array[DataType] = Array(
       NullType,