bug fixed for select distinct, for issue #2989

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -436,7 +436,6 @@ public class SQLExprParser extends SQLParser {
                 break;
             case DUAL:
             case KEY:
-            case DISTINCT:
             case LIMIT:
             case SCHEMA:
             case COLUMN:

src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_227.java

@@ -0,0 +1,35 @@
+/*
+ * 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.SQLUtils;
+
+
+public class MySqlSelectTest_227 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "select id, distinct name from a";
+
+        Exception error = null;
+        try {
+            SQLUtils.parseSingleMysqlStatement(sql);
+        } catch (Exception ex) {
+            error = ex;
+        }
+        assertNotNull(error);
+    }
+}