support taobao urgly update returning sql. for issue 1196. https://github.com/alibaba/druid/issues/1196

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

@@ -23,8 +23,9 @@ import com.alibaba.druid.sql.MysqlTest;
 import com.alibaba.druid.sql.SQLUtils;
 import com.alibaba.druid.sql.ast.SQLStatement;
 import com.alibaba.druid.sql.ast.statement.SQLSelect;
-import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.ast.statement.SQLUpdateStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock;
+import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlUpdateStatement;
 import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
 import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
 
@@ -41,14 +42,9 @@ public class MySqlSelectTest_update extends MysqlTest {
         List<SQLStatement> statementList = parser.parseStatementList();
         SQLStatement stmt = statementList.get(0);
 
-        SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
+        MySqlUpdateStatement updateStmt = (MySqlUpdateStatement) stmt;
 
-        SQLSelect select = selectStmt.getSelect();
-        Assert.assertNotNull(select.getQuery());
-        MySqlSelectQueryBlock queryBlock = (MySqlSelectQueryBlock) select.getQuery();
-        Assert.assertNull(queryBlock.getOrderBy());
-
-//        print(statementList);
+        print(statementList);
 
         Assert.assertEquals(1, statementList.size());
         

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlUpdateTest_5.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 1999-2101 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;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlUpdateTest_5 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "select num from update ttt set num=num+1 where id = 1";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+//        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(2, visitor.getColumns().size());
+        Assert.assertEquals(1, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("ttt")));
+
+        Assert.assertTrue(visitor.getColumns().contains(new Column("ttt", "num")));
+        Assert.assertTrue(visitor.getColumns().contains(new Column("ttt", "id")));
+
+        {
+            String output = SQLUtils.toMySqlString(stmt);
+            Assert.assertEquals("SELECT num"
+                    + "\nFROM UPDATE ttt"
+                    + "\nSET num = num + 1"
+                    + "\nWHERE id = 1", //
+                                output);
+        }
+        {
+            String output = SQLUtils.toMySqlString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION);
+            Assert.assertEquals("select num"
+                    + "\nfrom update ttt"
+                    + "\nset num = num + 1"
+                    + "\nwhere id = 1", //
+                                output);
+        }
+    }
+}