cecemei commented on code in PR #18638:
URL: https://github.com/apache/druid/pull/18638#discussion_r2433572845
##########
processing/src/main/java/org/apache/druid/segment/nested/NestedCommonFormatColumnFormatSpec.java:
##########
@@ -40,11 +40,11 @@
*/
public class NestedCommonFormatColumnFormatSpec
{
- private static final NestedCommonFormatColumnFormatSpec DEFAULT =
- NestedCommonFormatColumnFormatSpec.builder()
-
.setObjectFieldsDictionaryEncoding(StringEncodingStrategy.UTF8_STRATEGY)
-
.setObjectStorageEncoding(ObjectStorageEncoding.SMILE)
- .build();
+ private static final NestedCommonFormatColumnFormatSpec OPERATOR_DEFAULT =
builder().build();
Review Comment:
I feel like we should try to explain all these defaults and add some
documentations on the overriding orders of the spec. The `OPERATOR_DEFAULT`
seems like a convenient holder instance so that we can call `getEffectiveSpec`,
it doesn't represent anything meaningful, maybe we should move this to builder
class, and let builder accept null spec in its constructor.
Maybe the system default can be moved to indexspec? I see there're some
duplicates in defining the default for ObjectStorageEncoding and
ObjectFieldsDictionaryEncoding, i guess its due to indexspec can have all-null
values column spec as well, so maybe it might be nice to centralize them all in
one place, like `getObjectFieldsDictionaryEncodingOrDefault`.
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