jackye1995 commented on code in PR #6598:
URL: https://github.com/apache/iceberg/pull/6598#discussion_r1072532309
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api/src/main/java/org/apache/iceberg/view/SQLViewRepresentation.java:
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@@ -36,17 +38,21 @@ default Type type() {
String dialect();
/** The default catalog when the view is created. */
+ @Nullable
String defaultCatalog();
/** The default namespace when the view is created. */
+ @Nullable
Namespace defaultNamespace();
- /** The query output schema at version create time, without aliases. */
- Schema schema();
+ /** The query output schema id at version create time */
+ int schemaId();
Review Comment:
I see. After taking a deeper look, there are multiple places that we have
`schemaId()` as a part of the API model, such as in `Snapshot`.
I was using the case of `PartitionSpec` to argue that we should stick with
using `schema()`, but it was because there is a process of binding to a schema,
and the serialized version of partition spec is unbounded.
So the question here is not which one is more convenient to implement
parser, but if a view representation needs to bind to a schema at runtime, or
have a static schema. I think the answer is that it is static, as described as
"ID of the view’s schema when the version was created". So from that
perspective, I agree `schemaId()` seems like a better choice so we don't need
to cross reference existing schemas to make the parser work.
Any thoughts? @amogh-jahagirdar @nastra
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