comparisons methods

Author: pengpeng-lu

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/query/expressions/Comparisons.java

@@ -233,7 +233,7 @@ public static Object toClassWithRealEquals(@Nonnull Object obj) {
     }
 
     @SuppressWarnings("unchecked")
-    public static int compare(@Nullable Object fieldValue, @Nullable Object comparand) {
+    public static int compare(@Nonnull Object fieldValue, @Nonnull Object comparand) {
         return toComparable(fieldValue).compareTo(toComparable(comparand));
     }
 
@@ -285,9 +285,6 @@ private static Boolean compareStartsWith(@Nullable Object value, @Nullable Objec
     @Nullable
     @SpotBugsSuppressWarnings("NP_BOOLEAN_RETURN_NULL")
     private static Boolean compareLike(@Nullable Object value, @Nullable Object pattern) {
-        if (value == null) {
-            return null;
-        }
         if (!(value instanceof String)) {
             throw new RecordCoreException("Illegal comparand value type: " + value);
         }