content: /*
   * Copyright 1999-2018 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;
  
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
  import com.alibaba.druid.sql.dialect.oracle.visitor.OracleOutputVisitor;
  import junit.framework.TestCase;
  
  import java.util.List;
  
  public class OracleSQLParserTest extends TestCase {
      public void test_1() throws Exception {
          String sql = "SELECT employees_seq.nextval FROM DUAL;";
  
          OracleStatementParser parser = new OracleStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
  
          assertEquals(1, statementList.size());
  
          String text = output(statementList);
          System.out.println(text);
      }
  
      public void test_2() throws Exception {
          String sql = "SELECT LPAD(' ',2*(LEVEL-1)) || last_name org_chart, employee_id, manager_id, job_id FROM employees WHERE job_id != 'FI_MGR' START WITH job_id = 'AD_VP' CONNECT BY PRIOR employee_id = manager_id; ";
  
          OracleStatementParser parser = new OracleStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
  
          assertEquals(1, statementList.size());
  
          String text = output(statementList);
          System.out.println(text);
      }
  
      private String output(List<SQLStatement> stmtList) {
          StringBuilder out = new StringBuilder();
          OracleOutputVisitor visitor = new OracleOutputVisitor(out);
  
          for (SQLStatement stmt : stmtList) {
              stmt.accept(visitor);
          }
  
          return out.toString();
      }
  }
  