QuakeWang commented on code in PR #897:
URL: https://github.com/apache/paimon-rust/pull/897#discussion_r4111302321
##########
crates/paimon/src/arrow/format/blob.rs:
##########
@@ -1652,12 +1661,36 @@ struct BlobArrayLayout {
element_index_range: Range<u64>,
}
-#[derive(Debug, Clone)]
+#[derive(Debug)]
struct BlobFileIndex {
entries: Vec<BlobEntry>,
}
impl BlobFileIndex {
+ async fn load_cached(
+ reader: &dyn FileRead,
+ file_size: u64,
+ file_path: &str,
+ ) -> crate::Result<Arc<Self>> {
+ if !file_path.is_empty() {
+ let mut cache = BLOB_INDEX_CACHE
+ .lock()
+ .unwrap_or_else(|error| error.into_inner());
+ if let Some(index) = cache.get(file_path) {
+ return Ok(index.clone());
Review Comment:
The same path can refer to different files when two `FileIO` instances use
different storage roots. I tested this with two BLOB files of the same size and
row count: opening the second reused the first file’s index and returned `NULL`
instead of its actual value. The cache key needs to distinguish the storage
namespace too.
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