content: /*
   * 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.oracle.select;
  
  import com.alibaba.druid.sql.OracleTest;
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
  import com.alibaba.druid.sql.dialect.oracle.visitor.OracleSchemaStatVisitor;
  
  import java.util.List;
  
  public class OracleSelectTest64_with_recursive extends OracleTest {
      public void test_0() throws Exception {
          String sql = //
                  "WITH t1(id, parent_id, lvl) AS (\n" +
                          "  -- Anchor member.\n" +
                          "  SELECT id,\n" +
                          "         parent_id,\n" +
                          "         1 AS lvl\n" +
                          "  FROM   tab1\n" +
                          "  WHERE  parent_id IS NULL\n" +
                          "  UNION ALL\n" +
                          "  -- Recursive member.\n" +
                          "  SELECT t2.id,\n" +
                          "         t2.parent_id,\n" +
                          "         lvl+1\n" +
                          "  FROM   tab1 t2, t1\n" +
                          "  WHERE  t2.parent_id = t1.id\n" +
                          ")\n" +
                          "SEARCH DEPTH FIRST BY id SET order1\n" +
                          "SELECT id,\n" +
                          "       parent_id,\n" +
                          "       RPAD('.', (lvl-1)*2, '.') || id AS tree,\n" +
                          "       lvl\n" +
                          "FROM t1\n" +
                          "ORDER BY order1;";
  
          OracleStatementParser parser = new OracleStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          SQLStatement stmt = statementList.get(0);
          print(statementList);
  
          assertEquals(1, statementList.size());
  
          OracleSchemaStatVisitor visitor = new OracleSchemaStatVisitor();
          stmt.accept(visitor);
  
          System.out.println("Tables : " + visitor.getTables());
          System.out.println("fields : " + visitor.getColumns());
          System.out.println("coditions : " + visitor.getConditions());
          System.out.println("relationships : " + visitor.getRelationships());
          System.out.println("orderBy : " + visitor.getOrderByColumns());
  
          assertEquals(1, visitor.getTables().size());
  
          assertEquals(2, visitor.getColumns().size());
  
          {
              String text = SQLUtils.toOracleString(stmt);
  
              assertEquals("WITH t1 (id, parent_id, lvl) AS (\n" +
                      "\t\t-- Anchor member.\n" +
                      "\t\tSELECT id, parent_id, 1 AS lvl\n" +
                      "\t\tFROM tab1\n" +
                      "\t\tWHERE parent_id IS NULL\n" +
                      "\t\tUNION ALL\n" +
                      "\t\t-- Recursive member.\n" +
                      "\t\tSELECT t2.id, t2.parent_id, lvl + 1\n" +
                      "\t\tFROM tab1 t2, t1\n" +
                      "\t\tWHERE t2.parent_id = t1.id\n" +
                      "\t)\n" +
                      "\tSEARCH DEPTH FIRST BY id SET order1\n" +
                      "SELECT id, parent_id\n" +
                      "\t, RPAD('.', (lvl - 1) * 2, '.') || id AS tree\n" +
                      "\t, lvl\n" +
                      "FROM t1\n" +
                      "ORDER BY order1;", text);
          }
  
          {
              String text = SQLUtils.toOracleString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION);
  
              assertEquals("with t1 (id, parent_id, lvl) as (\n" +
                      "\t\t-- Anchor member.\n" +
                      "\t\tselect id, parent_id, 1 as lvl\n" +
                      "\t\tfrom tab1\n" +
                      "\t\twhere parent_id is null\n" +
                      "\t\tunion all\n" +
                      "\t\t-- Recursive member.\n" +
                      "\t\tselect t2.id, t2.parent_id, lvl + 1\n" +
                      "\t\tfrom tab1 t2, t1\n" +
                      "\t\twhere t2.parent_id = t1.id\n" +
                      "\t)\n" +
                      "\tsearch DEPTH first by id set order1\n" +
                      "select id, parent_id\n" +
                      "\t, RPAD('.', (lvl - 1) * 2, '.') || id as tree\n" +
                      "\t, lvl\n" +
                      "from t1\n" +
                      "order by order1;", text);
          }
      }
  }
  