sunriseLe commented on a change in pull request #385:
URL: https://github.com/apache/orc/pull/385#discussion_r835752858
##########
File path: proto/orc_proto.proto
##########
@@ -142,12 +149,35 @@ message ColumnEncoding {
optional uint32 bloomEncoding = 3;
}
+message StripeEncryptionVariant {
+ repeated Stream streams = 1;
+ repeated ColumnEncoding encoding = 2;
+}
+
+// each stripe looks like:
+// index streams
+// unencrypted
+// variant 1..N
+// data streams
+// unencrypted
+// variant 1..N
+// footer
+
message StripeFooter {
repeated Stream streams = 1;
repeated ColumnEncoding columns = 2;
optional string writerTimezone = 3;
+ // one for each column encryption variant
+ repeated StripeEncryptionVariant encryption = 4;
}
+// the file tail looks like:
+// encrypted stripe statistics: ColumnStripeStatistics (order by variant)
+// stripe statistics: Metadata
+// footer: Footer
Review comment:
> The encrypted file statistics are serialized directly into the
EncryptionVariant.fileStatistics.
When will EncryptionVarian.fileStatistics be not empty？ And where is the
encryption variant for file statistics stored？
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