Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/756#discussion_r39815240
--- Diff:
tajo-catalog/tajo-catalog-common/src/main/proto/CatalogProtos.proto ---
@@ -98,10 +98,11 @@ message TableDescProto {
required string table_name = 2;
optional string path = 3;
required TableProto meta = 4;
- required SchemaProto schema = 5;
+ optional SchemaProto schema = 5;
--- End diff --
If we can ensure that the TableDescs of all normal tables have Schema, we
can use its ``optional`` constraint to indicate either self-describing or not.
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