add lzo.

Author: dongjoon-hyun

sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -322,13 +322,12 @@ object SQLConf {
       .booleanConf
       .createWithDefault(true)
 
-  // We can add LZO after Apache ORC 1.4.0 is used.
   val ORC_COMPRESSION = buildConf("spark.sql.orc.compression.codec")
     .doc("Sets the compression codec use when writing ORC files. Acceptable values include: " +
-      "uncompressed, snappy, zlib.")
+      "none, uncompressed, snappy, zlib, lzo.")
     .stringConf
     .transform(_.toLowerCase(Locale.ROOT))
-    .checkValues(Set("none", "uncompressed", "snappy", "zlib"))
+    .checkValues(Set("none", "uncompressed", "snappy", "zlib", "lzo"))
     .createWithDefault("snappy")
 
   val ORC_FILTER_PUSHDOWN_ENABLED = buildConf("spark.sql.orc.filterPushdown")

sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcSourceSuite.scala

@@ -208,7 +208,7 @@ abstract class OrcSuite extends QueryTest with TestHiveSingleton with BeforeAndA
         new OrcOptions(Map("orc.compress" -> "zlib"), conf).compressionCodec == "ZLIB")
     }
 
-    Seq("NONE", "SNAPPY", "ZLIB").foreach { c =>
+    Seq("NONE", "SNAPPY", "ZLIB", "LZO").foreach { c =>
       withSQLConf(SQLConf.ORC_COMPRESSION.key -> c) {
         assert(new OrcOptions(Map.empty[String, String], conf).compressionCodec == c)
       }