diff --git a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
index 19b85f5fd0..1cf0a559fe 100644
--- a/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java
@@ -479,7 +479,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
                     SQLExpr left = binaryItem.getLeft();
                     SQLExpr right = binaryItem.getRight();
 
-                    if (right instanceof SQLLiteralExpr) {
+                    if (right instanceof SQLLiteralExpr && !(right instanceof SQLNullExpr)) {
                         if (left instanceof SQLLiteralExpr) {
                             if (literalItems == null) {
                                 literalItems = new ArrayList<SQLBinaryOpExpr>();
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/param/MySqlParameterizedOutputVisitorTest_57.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/param/MySqlParameterizedOutputVisitorTest_57.java
index b8a95cfbce..b4bc42858d 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/mysql/param/MySqlParameterizedOutputVisitorTest_57.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/param/MySqlParameterizedOutputVisitorTest_57.java
@@ -2,6 +2,7 @@ package com.alibaba.druid.bvt.sql.mysql.param;
 
 import com.alibaba.druid.sql.SQLUtils;
 import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserFeature;
 import com.alibaba.druid.sql.parser.SQLParserUtils;
 import com.alibaba.druid.sql.parser.SQLStatementParser;
 import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
@@ -28,7 +29,7 @@ public class MySqlParameterizedOutputVisitorTest_57 extends TestCase {
                 "       OR (`ktv_resource`.`AVAILABLE_COUNT` = -1))" +
                 ") limit 0,20";
 
-        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType, SQLParserFeature.EnableSQLBinaryOpExprGroup);
         List<SQLStatement> stmtList = parser.parseStatementList();
         SQLStatement stmt = stmtList.get(0);
 
@@ -50,6 +51,8 @@ public class MySqlParameterizedOutputVisitorTest_57 extends TestCase {
         System.out.println(psql);
 
 
+
+
         assertEquals("SELECT `ktv_resource`.`VERSION`\n" +
                 "FROM ktv_resource `ktv_resource`\n" +
                 "WHERE `ktv_resource`.`BUYER_ID` = ?\n" +