Merge remote-tracking branch 'origin/1.5.4-SNAPSHOT' into 2.0.0.M1

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/clause/WhereClauseParser.java

@@ -98,7 +98,8 @@ public class WhereClauseParser implements SQLClauseParser {
             }
         }
         List<Keyword> otherConditionOperators = new LinkedList<>(Arrays.asList(getCustomizedOtherConditionOperators()));
-        otherConditionOperators.addAll(Arrays.asList(Symbol.LT, Symbol.LT_EQ, Symbol.GT, Symbol.GT_EQ, Symbol.LT_GT, Symbol.BANG_EQ, Symbol.BANG_GT, Symbol.BANG_LT, DefaultKeyword.LIKE));
+        otherConditionOperators.addAll(
+                Arrays.asList(Symbol.LT, Symbol.LT_EQ, Symbol.GT, Symbol.GT_EQ, Symbol.LT_GT, Symbol.BANG_EQ, Symbol.BANG_GT, Symbol.BANG_LT, DefaultKeyword.LIKE, DefaultKeyword.IS));
         if (lexerEngine.skipIfEqual(otherConditionOperators.toArray(new Keyword[otherConditionOperators.size()]))) {
             parseOtherCondition(sqlStatement);
         }