[SPARK-12195][SQL] Adding BigDecimal, Date and Timestamp into Encoder

This PR is to add three more data types into Encoder, including `BigDecimal`, `Date` and `Timestamp`.

marmbrus cloud-fan rxin Could you take a quick look at these three types? Not sure if it can be merged to 1.6. Thank you very much!

Author: gatorsmile <gatorsmile@gmail.com>

Closes #10188 from gatorsmile/dataTypesinEncoder.

1 files changed, 17 insertions, 0 deletions

diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index ae47f4fe0e..383a2d0bad 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -18,6 +18,9 @@
 package test.org.apache.spark.sql;
 
 import java.io.Serializable;
+import java.math.BigDecimal;
+import java.sql.Date;
+import java.sql.Timestamp;
 import java.util.*;
 
 import scala.Tuple2;
@@ -386,6 +389,20 @@ public class JavaDatasetSuite implements Serializable {
   }
 
   @Test
+  public void testPrimitiveEncoder() {
+    Encoder<Tuple5<Double, BigDecimal, Date, Timestamp, Float>> encoder =
+      Encoders.tuple(Encoders.DOUBLE(), Encoders.DECIMAL(), Encoders.DATE(), Encoders.TIMESTAMP(),
+        Encoders.FLOAT());
+    List<Tuple5<Double, BigDecimal, Date, Timestamp, Float>> data =
+      Arrays.asList(new Tuple5<Double, BigDecimal, Date, Timestamp, Float>(
+        1.7976931348623157E308, new BigDecimal("0.922337203685477589"),
+          Date.valueOf("1970-01-01"), new Timestamp(System.currentTimeMillis()), Float.MAX_VALUE));
+    Dataset<Tuple5<Double, BigDecimal, Date, Timestamp, Float>> ds =
+      context.createDataset(data, encoder);
+    Assert.assertEquals(data, ds.collectAsList());
+  }
+
+  @Test
   public void testTypedAggregation() {
     Encoder<Tuple2<String, Integer>> encoder = Encoders.tuple(Encoders.STRING(), Encoders.INT());
     List<Tuple2<String, Integer>> data =