liurenjie1024 commented on code in PR #129:
URL: https://github.com/apache/iceberg-rust/pull/129#discussion_r1445553493
##########
crates/iceberg/src/spec/snapshot.rs:
##########
@@ -124,6 +150,70 @@ impl Snapshot {
Utc.timestamp_millis_opt(self.timestamp_ms).unwrap()
}
+ /// Get the schema id of this snapshot.
+ #[inline]
+ pub fn schema_id(&self) -> Option<SchemaId> {
+ self.schema_id
+ }
+
+ /// Get the schema of this snapshot.
+ pub fn schema(&self, table_metadata: &TableMetadata) -> Result<SchemaRef> {
+ Ok(match self.schema_id() {
+ Some(schema_id) => table_metadata
+ .schema_by_id(schema_id)
+ .ok_or_else(|| {
+ Error::new(
+ ErrorKind::DataInvalid,
+ format!("Schema with id {} not found", schema_id),
+ )
+ })?
+ .clone(),
+ None => table_metadata.current_schema().clone(),
+ })
+ }
+
+ /// Get parent snapshot.
+ #[cfg(test)]
+ pub(crate) fn parent_snapshot(&self, table_metadata: &TableMetadata) ->
Option<SnapshotRef> {
+ match self.parent_snapshot_id {
+ Some(id) => table_metadata.snapshot_by_id(id).cloned(),
+ None => None,
+ }
+ }
+
+ /// Load manifest list.
+ pub async fn load_manifest_list(
+ &self,
+ file_io: &FileIO,
+ table_metadata: &TableMetadata,
+ ) -> Result<ManifestList> {
+ match &self.manifest_list {
+ ManifestListLocation::ManifestListFile(file) => {
+ let mut manifest_list_content= Vec::new();
+ file_io
+ .new_input(file)?
+ .reader().await?
+ .read_to_end(&mut manifest_list_content)
+ .await?;
+
+ let schema = self.schema(table_metadata)?;
+
+ let partition_type_provider = |partition_spec_id: i32| ->
Result<Option<StructType>> {
+
table_metadata.partition_spec_by_id(partition_spec_id).map(|partition_spec| {
+ partition_spec.partition_type(&schema)
+ }).transpose()
+ };
+
+ ManifestList::parse_with_version(&manifest_list_content,
table_metadata.format_version(),
+ partition_type_provider, )
+ }
+ ManifestListLocation::ManifestFiles(_) => Err(Error::new(
Review Comment:
Sounds good to me.
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