Index: ql/src/java/org/apache/hadoop/hive/ql/optimizer/optiq/translator/TypeConverter.java =================================================================== --- ql/src/java/org/apache/hadoop/hive/ql/optimizer/optiq/translator/TypeConverter.java (revision 1635652) +++ ql/src/java/org/apache/hadoop/hive/ql/optimizer/optiq/translator/TypeConverter.java (working copy) @@ -187,7 +187,7 @@ throw new RuntimeException("Unsupported Type : " + type.getTypeName()); } - return convertedType; + return dtFactory.createTypeWithNullability(convertedType, true); } public static RelDataType convert(ListTypeInfo lstType,