mysql parser support Hierarchical clause.

src/test/java/com/alibaba/druid/bvt/sql/oceanbase/OceanbaseSelectTest.java

@@ -0,0 +1,67 @@
+/*
+ * 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.oceanbase;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+
+import java.util.List;
+
+public class OceanbaseSelectTest extends MysqlTest {
+    protected final String dbType = JdbcConstants.MYSQL;
+
+    public void test_0() throws Exception {
+        String sql = "SELECT EmpID, EmpName, MgrId, Level FROM emp START WITH MgrId IS NULL CONNECT BY PRIOR EmpId = MgrId"; //
+
+        List<SQLStatement> stmtList = SQLUtils.parseStatements(sql, dbType);
+        SQLStatement stmt = stmtList.get(0);
+
+        {
+            String result = SQLUtils.toSQLString(stmt, dbType);
+            assertEquals("SELECT EmpID, EmpName, MgrId, Level\n" +
+                    "FROM emp\n" +
+                    "START WITH MgrId IS NULL\n" +
+                    "CONNECT BY PRIOR EmpId = MgrId", result);
+        }
+        {
+            String result = SQLUtils.toSQLString(stmt, dbType, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION);
+            assertEquals("select EmpID, EmpName, MgrId, Level\n" +
+                    "from emp\n" +
+                    "start with MgrId is null\n" +
+                    "connect by prior EmpId = MgrId", result);
+        }
+
+        assertEquals(1, stmtList.size());
+
+        SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(dbType);
+        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());
+
+        assertEquals(1, visitor.getTables().size());
+        assertEquals(4, visitor.getColumns().size());
+        assertEquals(0, visitor.getConditions().size());
+
+        // assertTrue(visitor.getTables().containsKey(new TableStat.Name("t_basic_store")));
+
+    }
+}