mchades commented on code in PR #8212:
URL: https://github.com/apache/gravitino/pull/8212#discussion_r2290146703
##########
catalogs/hive-metastore-common/src/main/java/org/apache/gravitino/hive/converter/HiveDataTypeConverter.java:
##########
@@ -116,7 +117,17 @@ public TypeInfo fromGravitino(Type type) {
Types.StructType structType = (Types.StructType) type;
List<TypeInfo> typeInfos =
Arrays.stream(structType.fields())
- .map(t -> fromGravitino(t.type()))
+ .map(
+ t -> {
+ // Hive does not support comments in struct fields. This
is no way to preserve
+ // comments in struct fields when converting from
Gravitino to Hive.
+ // See: https://issues.apache.org/jira/browse/HIVE-26593
+ Preconditions.checkArgument(
+ t.comment() == null,
+ "Hive does not support comments in struct fields:
%s",
+ t.name());
+ return fromGravitino(t.type());
+ })
Review Comment:
I'm afraid this will cause confusion for the user, as the field is set
without errors but doesn't work when loaded (as the issue mentioned #4874 ).
Sometimes the user cannot access the server log, which will take time to
explain.
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