The internal IntArray class did not work correctly when initialized with a zero length array.

h2/src/main/org/h2/util/IntArray.java

@@ -71,7 +71,7 @@ public class IntArray {
 
     private void checkCapacity() {
         if (size >= data.length) {
-            int[] d = new int[data.length * 2];
+            int[] d = new int[Math.max(4, data.length * 2)];
             System.arraycopy(data, 0, d, 0, data.length);
             data = d;
         }

h2/src/main/org/h2/util/JdbcUtils.java

@@ -126,6 +126,19 @@ public class JdbcUtils {
         return getConnection(driver, url, prop);
     }
 
+    /**
+     * Escape table or schema patterns used for DatabaseMetaData functions.
+     *
+     * @param pattern the pattern
+     * @return the escaped pattern
+     */
+    public static String escapeMetaDataPattern(String pattern) {
+        if (pattern == null || pattern.length() == 0) {
+            return pattern;
+        }
+        return StringUtils.replaceAll(pattern, "\\", "\\\\");
+    }
+
     /**
      * Open a new database connection with the given settings.
      *