tengqm commented on code in PR #5761:
URL: https://github.com/apache/gravitino/pull/5761#discussion_r1872401267


##########
core/src/main/java/org/apache/gravitino/catalog/CatalogManager.java:
##########
@@ -677,11 +678,42 @@ public boolean dropCatalog(NameIdentifier ident, boolean 
force)
     } catch (NoSuchMetalakeException | NoSuchCatalogException ignored) {
       return false;
 
-    } catch (IOException e) {
+    } catch (GravitinoRuntimeException e) {
+      throw e;
+
+    } catch (Exception e) {
       throw new RuntimeException(e);
     }
   }
 
+  private boolean haveAvailableSchemas(
+      List<SchemaEntity> schemaEntities, CatalogEntity catalogEntity, 
CatalogWrapper catalogWrapper)
+      throws Exception {
+    if (schemaEntities.isEmpty()) {
+      return false;
+    }
+
+    if (schemaEntities.size() == 1 && 
catalogEntity.getProvider().equals("kafka")) {

Review Comment:
   This can be optimized, IMHO.
   
   If kafka is special for a reason, e.g. kafka is evil, you may want to add a 
function
   to the class `isProviderEvil()`. I mean, you may want to consolidate this 
kind of tests
   based on the business logic and maintain that logic, rather than treating 
kafka as
   a special animal.



##########
core/src/main/java/org/apache/gravitino/catalog/CatalogManager.java:
##########
@@ -677,11 +678,42 @@ public boolean dropCatalog(NameIdentifier ident, boolean 
force)
     } catch (NoSuchMetalakeException | NoSuchCatalogException ignored) {
       return false;
 
-    } catch (IOException e) {
+    } catch (GravitinoRuntimeException e) {
+      throw e;
+
+    } catch (Exception e) {
       throw new RuntimeException(e);
     }
   }
 
+  private boolean haveAvailableSchemas(

Review Comment:
   ```suggestion
     private boolean hasSchemas(
   ```



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