add testcase for issue #2119

src/main/java/com/alibaba/druid/sql/ast/SQLCommentHint.java

@@ -15,6 +15,7 @@
  */
 package com.alibaba.druid.sql.ast;
 
+import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
 import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
 public class SQLCommentHint extends SQLObjectImpl implements SQLHint {
@@ -46,4 +47,8 @@ public class SQLCommentHint extends SQLObjectImpl implements SQLHint {
     public SQLCommentHint clone() {
         return new SQLCommentHint(text);
     }
+
+    public void output(StringBuffer buf) {
+        new SQLASTOutputVisitor(buf).visit(this);
+    }
 }

src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_91_hints.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 1999-2017 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.mysql.select;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLCommentHint;
+import com.alibaba.druid.sql.ast.SQLHint;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class MySqlSelectTest_91_hints extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "select id from a /*+ xxx */ ";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+
+        assertEquals(1, statementList.size());
+
+        SQLSelectStatement stmt = (SQLSelectStatement) statementList.get(0);
+        assertEquals("SELECT id\n" +
+                "FROM a/*+ xxx */", stmt.toString());
+        SQLCommentHint hint = (SQLCommentHint) stmt.getSelect().getHints().get(0);
+        assertEquals("+ xxx ", hint.getText());
+    }
+}