okumin commented on code in PR #5882:
URL: https://github.com/apache/hive/pull/5882#discussion_r2250543039
##########
standalone-metastore/metastore-rest-catalog/src/main/java/org/apache/iceberg/rest/HMSCachingCatalog.java:
##########
@@ -35,24 +36,22 @@
import org.apache.iceberg.hive.HiveCatalog;
import org.apache.iceberg.view.View;
import org.apache.iceberg.view.ViewBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
/**
* Class that wraps an Iceberg Catalog to cache tables.
*/
public class HMSCachingCatalog extends CachingCatalog implements
SupportsNamespaces, ViewCatalog {
+ private static final Logger LOG =
LoggerFactory.getLogger(HMSCachingCatalog.class);
private final HiveCatalog hiveCatalog;
public HMSCachingCatalog(HiveCatalog catalog, long expiration) {
- super(catalog, true, expiration, Ticker.systemTicker());
+ super(catalog, false, expiration, Ticker.systemTicker());
Review Comment:
I'm curious about pros vs cons of the case sensitivity here.
##########
standalone-metastore/metastore-rest-catalog/src/main/java/org/apache/iceberg/rest/HMSCachingCatalog.java:
##########
@@ -63,6 +62,27 @@ public List<Namespace> listNamespaces(Namespace nmspc)
throws NoSuchNamespaceExc
return hiveCatalog.listNamespaces(nmspc);
}
+ @Override
+ public Table loadTable(TableIdentifier identifier) {
+ TableIdentifier canonicalIdentifier = identifier.toLowerCase();
+ Table cachedTable = tableCache.getIfPresent(canonicalIdentifier);
+ if (cachedTable != null) {
+ String location = hiveCatalog.getTableLocation(canonicalIdentifier);
+ if (location == null) {
+ LOG.debug("Table {} has no location, returning cached table without
location", canonicalIdentifier);
+ } else if (!location.equals(cachedTable.location())) {
+ LOG.debug("Cached table {} has a different location than the one in
the catalog: {} != {}",
+ canonicalIdentifier, cachedTable.location(), location);
+ } else {
+ LOG.debug("Returning cached table: {}", canonicalIdentifier);
+ return cachedTable;
+ }
+ // Invalidate the cached table if the location is different
+ tableCache.invalidate(cachedTable);
Review Comment:
I guess it's a little more robust to use `CachingCatalog#invalidateTable`.
Please correct me if the current implementation is intentional.
https://github.com/apache/iceberg/blob/apache-iceberg-1.9.2/core/src/main/java/org/apache/iceberg/CachingCatalog.java#L186-L191
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