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.db2;
  
  import com.alibaba.druid.sql.DB2Test;
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
  import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
  import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
  import com.alibaba.druid.stat.TableStat;
  import com.alibaba.druid.util.JdbcConstants;
  
  import java.util.List;
  
  public class DB2SelectTest_33 extends DB2Test {
      public void test_0() throws Exception {
          String sql = "SELECT CURRENT_DATE -2 DAY FROM SYSIBM.SYSDUMMY1;";
  
          DB2StatementParser parser = new DB2StatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          SQLSelectStatement stmt = (SQLSelectStatement) statementList.get(0);
          assertEquals("SYSIBM.SYSDUMMY1", stmt.getSelect().getQueryBlock().getFrom().toString());
  
          assertEquals(1, statementList.size());
  
          DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
          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(0, visitor.getColumns().size());
          assertEquals(0, visitor.getConditions().size());
  
          assertTrue(visitor.getTables().containsKey(new TableStat.Name("sysibm.sysdummy1")));
  
  //         assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
          // assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
          // assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
  
          assertEquals("SELECT CURRENT_DATE - 2 DAYS\n" +
                          "FROM SYSIBM.SYSDUMMY1;", //
                  SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
  
          assertEquals("select CURRENT_DATE - 2 days\n" +
                          "from SYSIBM.SYSDUMMY1;", //
                  SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
      }
  }
  