support cobar hints

src/main/java/com/alibaba/druid/mock/handler/MySqlMockExecuteHandlerImpl.java

@@ -102,6 +102,7 @@ public class MySqlMockExecuteHandlerImpl implements MockExecuteHandler {
         return rs;
     }
 
+    @SuppressWarnings("resource")
     public ResultSet executeQueryFromDual(MockStatement statement, SQLSelectQueryBlock query) throws SQLException {
         MockResultSet rs = new MockResultSet(statement);
         MockResultSetMetaData metaData = rs.getMockMetaData();

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

@@ -215,6 +215,11 @@ public class SQLStatementParser extends SQLParser {
             if (parseStatementListDialect(statementList)) {
                 continue;
             }
+            
+            if (lexer.token() == Token.HINT) {
+                lexer.nextToken();
+                continue;
+            }
 
             throw new ParserException("TODO " + lexer.token() + " " + lexer.stringVal());
         }

src/test/java/com/alibaba/druid/bvt/sql/mysql/CobarHintsTest.java

@@ -0,0 +1,13 @@
+package com.alibaba.druid.bvt.sql.mysql;
+
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.SQLUtils;
+
+public class CobarHintsTest extends TestCase {
+    public void test_0 () throws Exception {
+        String sql = "/*!cobar: select,4,ireport.dm_mdm_mem_prod_noeff_sdt0.admin_member_seq=45654723*/ select * from t";
+        
+        SQLUtils.formatMySql(sql);
+    }
+}