KyleLin0927 commented on code in PR #7235:
URL: https://github.com/apache/gravitino/pull/7235#discussion_r2106375593


##########
catalogs/catalog-jdbc-common/src/main/java/org/apache/gravitino/catalog/jdbc/operation/JdbcDatabaseOperations.java:
##########
@@ -219,9 +219,17 @@ protected boolean isSystemDatabase(String dbName) {
     return 
createSysDatabaseNameSet().contains(dbName.toLowerCase(Locale.ROOT));
   }
 
-  /** Check whether support setting schema comment. */
+  /**
+   * Check whether support setting schema comment.
+   *
+   * @return true if schema comments are supported; false otherwise.
+   */
   protected abstract boolean supportSchemaComment();
 
-  /** Create a set of system database names. */
+  /**
+   * Create a set of system database names.
+   *
+   * @return a set of system database names in lowercase.

Review Comment:
   Hi @justinmclean , thanks for your review, the implementation returns 
lowercase. If you’d like me to remove the ‘in lowercase’ part I can take care 
of that as well.



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