[SPARK-3007][SQL]Add Dynamic Partition support to Spark Sql hive

a new PR base on new master.  changes are the same as apache#1919

Author: baishuo(白硕) <[email protected]>
Author: baishuo <[email protected]>
Author: Cheng Lian <[email protected]>

Closes apache#2226 from baishuo/patch-3007 and squashes the following commits:

e69ce88 [Cheng Lian] Adds tests to verify dynamic partitioning folder layout
b20a3dc [Cheng Lian] Addresses @yhuai's comments
096bbbc [baishuo(白硕)] Merge pull request #1 from liancheng/refactor-dp
1093c20 [Cheng Lian] Adds more tests
5004542 [Cheng Lian] Minor refactoring
fae9eff [Cheng Lian] Refactors InsertIntoHiveTable to a Command
528e84c [Cheng Lian] Fixes typo in test name, regenerated golden answer files
c464b26 [Cheng Lian] Refactors dynamic partitioning support
5033928 [baishuo] pass check style
2201c75 [baishuo] use HiveConf.DEFAULTPARTITIONNAME to replace hive.exec.default.partition.name
b47c9bf [baishuo] modify according micheal's advice
c3ab36d [baishuo] modify for some bad indentation
7ce2d9f [baishuo] modify code to pass scala style checks
37c1c43 [baishuo] delete a empty else branch
66e33fc [baishuo] do a little modify
88d0110 [baishuo] update file after test
a3961d9 [baishuo(白硕)] Update Cast.scala
f7467d0 [baishuo(白硕)] Update InsertIntoHiveTable.scala
c1a59dd [baishuo(白硕)] Update Cast.scala
0e18496 [baishuo(白硕)] Update HiveQuerySuite.scala
60f70aa [baishuo(白硕)] Update InsertIntoHiveTable.scala
0a50db9 [baishuo(白硕)] Update HiveCompatibilitySuite.scala
491c7d0 [baishuo(白硕)] Update InsertIntoHiveTable.scala
a2374a8 [baishuo(白硕)] Update InsertIntoHiveTable.scala
701a814 [baishuo(白硕)] Update SparkHadoopWriter.scala
dc24c41 [baishuo(白硕)] Update HiveQl.scala

Author: baishuo

sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala

@@ -220,6 +220,23 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
    */
   override def whiteList = Seq(
     "add_part_exist",
+    "dynamic_partition_skip_default",
+    "infer_bucket_sort_dyn_part",
+    "load_dyn_part1",
+    "load_dyn_part2",
+    "load_dyn_part3",
+    "load_dyn_part4",
+    "load_dyn_part5",
+    "load_dyn_part6",
+    "load_dyn_part7",
+    "load_dyn_part8",
+    "load_dyn_part9",
+    "load_dyn_part10",
+    "load_dyn_part11",
+    "load_dyn_part12",
+    "load_dyn_part13",
+    "load_dyn_part14",
+    "load_dyn_part14_win",
     "add_part_multiple",
     "add_partition_no_whitelist",
     "add_partition_with_whitelist",

sql/hive/src/main/scala/org/apache/spark/SparkHadoopWriter.scala

@@ -837,11 +837,6 @@ private[hive] object HiveQl {
           cleanIdentifier(key.toLowerCase) -> None
       }.toMap).getOrElse(Map.empty)
 
-      if (partitionKeys.values.exists(p => p.isEmpty)) {
-        throw new NotImplementedError(s"Do not support INSERT INTO/OVERWRITE with" +
-          s"dynamic partitioning.")
-      }
-
       InsertIntoTable(UnresolvedRelation(db, tableName, None), partitionKeys, query, overwrite)
 
     case a: ASTNode =>