Use Mode.getEnum() instead of comparison with slower Mode.getOracle()

h2/src/main/org/h2/engine/Mode.java

@@ -345,10 +345,6 @@ public class Mode {
         return MODES.get(StringUtils.toUpperEnglish(name));
     }
 
-    public static Mode getOracle() {
-        return getInstance(ModeEnum.Oracle.name());
-    }
-
     public static Mode getRegular() {
         return getInstance(ModeEnum.REGULAR.name());
     }

h2/src/main/org/h2/expression/Function.java

@@ -1315,7 +1315,7 @@ public class Function extends Expression implements FunctionCall {
         }
         case REPLACE: {
             if (v0 == ValueNull.INSTANCE || v1 == ValueNull.INSTANCE
-                    || v2 == ValueNull.INSTANCE && database.getMode() != Mode.getOracle()) {
+                    || v2 == ValueNull.INSTANCE && database.getMode().getEnum() != Mode.ModeEnum.Oracle) {
                 result = ValueNull.INSTANCE;
             } else {
                 String s0 = v0.getString();