sql parser direct support OVER

src/test/java/com/alibaba/druid/bvt/sql/OverTest.java

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+package com.alibaba.druid.bvt.sql;
+
+import java.util.List;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+
+public class OverTest extends TestCase {
+
+    public void test_over() throws Exception {
+        String sql = "SELECT SalesOrderID, ProductID, OrderQty" + //
+                     "    ,SUM(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Total'" + //
+                     "    ,AVG(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Avg'" + //
+                     "    ,COUNT(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Count'" + //
+                     "    ,MIN(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Min'" + //
+                     "    ,MAX(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Max' " + //
+                     "FROM Sales.SalesOrderDetail " + //
+                     "WHERE SalesOrderID IN(43659,43664);";
+
+        SQLStatementParser parser = new SQLStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+
+        Assert.assertEquals(1, statementList.size());
+
+        SchemaStatVisitor visitor = new SchemaStatVisitor();
+        statemen.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+
+        Assert.assertEquals(3, visitor.getColumns().size());
+        Assert.assertEquals(1, visitor.getTables().size());
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/sqlserver/SQLServerRowNumberTest.java

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+/*
+ * Copyright 1999-2011 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.sqlserver;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.sqlserver.parser.SQLServerStatementParser;
+import com.alibaba.druid.sql.test.TestUtils;
+
+public class SQLServerRowNumberTest extends TestCase {
+
+    public void test_isEmpty() throws Exception {
+        String sql = "SELECT c.FirstName, c.LastName" + //
+                     "    ,ROW_NUMBER() OVER(ORDER BY SalesYTD DESC) AS 'Row Number'" + //
+                     "    ,s.SalesYTD, a.PostalCode " + //
+                     "FROM Sales.SalesPerson s " + //
+                     "    INNER JOIN Person.Contact c " + //
+                     "        ON s.SalesPersonID = c.ContactID" + //
+                     "    INNER JOIN Person.Address a " + //
+                     "        ON a.AddressID = c.ContactID " + //
+                     "WHERE TerritoryID IS NOT NULL " + //
+                     "    AND SalesYTD <> 0;";
+
+        String expect = "SELECT c.FirstName, c.LastName, ROW_NUMBER() OVER () ORDER BY SalesYTD DESC AS 'Row Number', s.SalesYTD, a.PostalCode" //
+                        + "\nFROM Sales.SalesPerson s INNER JOIN Person.Contact c ON s.SalesPersonID = c.ContactID INNER JOIN Person.Address a ON a.AddressID = c.ContactID" //
+                        + "\nWHERE TerritoryID IS NOT NULL" //
+                        + "\n\tAND SalesYTD <> 0";
+
+        SQLServerStatementParser parser = new SQLServerStatementParser(sql);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+
+        String text = TestUtils.outputSqlServer(stmt);
+
+        Assert.assertEquals(expect, text);
+
+        System.out.println(text);
+    }
+}