Update to latest IDL

src/main/protobuf/orc_proto.proto

@@ -39,6 +39,10 @@ message StringStatistics {
   optional string maximum = 2;
   // sum will store the total length of all strings in a stripe
   optional sint64 sum = 3;
+  // If the minimum or maximum value was longer than 1024 bytes, store a lower or upper
+  // bound instead of the minimum or maximum values above.
+  optional string lowerBound = 4;
+  optional string upperBound = 5;
 }
 
 message BucketStatistics {
@@ -81,6 +85,7 @@ message ColumnStatistics {
   optional BinaryStatistics binaryStatistics = 8;
   optional TimestampStatistics timestampStatistics = 9;
   optional bool hasNull = 10;
+  optional uint64 bytesOnDisk = 11;
 }
 
 message RowIndexEntry {
@@ -207,6 +212,7 @@ message Footer {
   // 0 = ORC Java
   // 1 = ORC C++
   // 2 = Presto
+  // 3 = Scritchley Go from https://github.com/scritchley/orc
   optional uint32 writer = 9;
 }
 
@@ -254,6 +260,9 @@ message PostScript {
   // Version of the Presto writer:
   //   6 = original
   //
+  // Version of the Scritchley Go writer:
+  //   6 = original
+  //
   optional uint32 writerVersion = 6;
   // Leave this last in the record
   optional string magic = 8000;