yuqi1129 commented on code in PR #9201:
URL: https://github.com/apache/gravitino/pull/9201#discussion_r2564563686
##########
lance/lance-common/src/main/java/org/apache/gravitino/lance/common/ops/gravitino/GravitinoLanceTableOperations.java:
##########
@@ -266,6 +267,63 @@ public DeregisterTableResponse deregisterTable(String
tableId, String delimiter)
return response;
}
+ @Override
+ public boolean tableExists(String tableId, String delimiter) {
+ ObjectIdentifier nsId = ObjectIdentifier.of(tableId,
Pattern.quote(delimiter));
+ Preconditions.checkArgument(
+ nsId.levels() == 3, "Expected at 3-level namespace but got: %s",
nsId.levels());
+
+ String catalogName = nsId.levelAtListPos(0);
+ Catalog catalog =
namespaceWrapper.loadAndValidateLakehouseCatalog(catalogName);
+
+ NameIdentifier tableIdentifier =
+ NameIdentifier.of(nsId.levelAtListPos(1), nsId.levelAtListPos(2));
+
+ return catalog.asTableCatalog().tableExists(tableIdentifier);
+ }
+
+ @Override
+ public DropTableResponse dropTable(String tableId, String delimiter) {
+ ObjectIdentifier nsId = ObjectIdentifier.of(tableId,
Pattern.quote(delimiter));
+ Preconditions.checkArgument(
+ nsId.levels() == 3, "Expected at 3-level namespace but got: %s",
nsId.levels());
+
+ String catalogName = nsId.levelAtListPos(0);
+ Catalog catalog =
namespaceWrapper.loadAndValidateLakehouseCatalog(catalogName);
+
+ NameIdentifier tableIdentifier =
+ NameIdentifier.of(nsId.levelAtListPos(1), nsId.levelAtListPos(2));
+
+ Table table;
+ try {
+ table = catalog.asTableCatalog().loadTable(tableIdentifier);
+ } catch (NoSuchTableException e) {
+ throw LanceNamespaceException.notFound(
+ "Table not found: " + tableId,
+ NoSuchTableException.class.getSimpleName(),
+ tableId,
+ CommonUtil.formatCurrentStackTrace());
+ }
+
+ boolean deleted = catalog.asTableCatalog().purgeTable(tableIdentifier);
Review Comment:
Yes, it should delete metadata and data at the same time. More details can
be here: https://docs.lancedb.com/api-reference/tables/drop-table
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