Documentation.

h2/src/docsrc/html/advanced.html

@@ -1596,6 +1596,7 @@ OR X = 2 OR X = 2 OR X = 2 OR X = 2 OR X = 2
     maximum columns per table, columns per index, indexes per table, lob columns per table, and so on;
     maximum row length, index row length, select row length;
     maximum length of a varchar column, decimal column, literal in a statement.
+</li><li>Querying from the metadata tables is slow if there are many tables (thousands).
 </li><li>For limitations on data types, see the documentation of the respective Java data type
     or the data type documentation of this database.
 </li></ul>