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.mysql.select;
  
  import com.alibaba.druid.sql.MysqlTest;
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.ast.statement.SQLSelect;
  import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
  import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock;
  import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
  import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
  
  import java.util.List;
  
  public class MySqlSelectTest_181_limit extends MysqlTest {
      public void test_0() throws Exception {
          String sql = "(select 1) limit 1;";
  
          MySqlStatementParser parser = new MySqlStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          SQLStatement stmt = statementList.get(0);
  
          SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
  
          SQLSelect select = selectStmt.getSelect();
          assertNotNull(select.getQuery());
          MySqlSelectQueryBlock queryBlock = (MySqlSelectQueryBlock) select.getQuery();
          assertNull(queryBlock.getOrderBy());
  
  //        print(statementList);
  
          assertEquals(1, statementList.size());
  
          MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
          stmt.accept(visitor);
  
          assertEquals(0, visitor.getTables().size());
          assertEquals(0, visitor.getColumns().size());
          assertEquals(0, visitor.getConditions().size());
          assertEquals(0, visitor.getOrderByColumns().size());
  
  //        assertTrue(visitor.getTables().containsKey(new TableStat.Name("ub_userdiscuss")));
  
          String output = SQLUtils.toMySqlString(stmt);
          assertEquals("(SELECT 1\n" +
                          "LIMIT 1);", //
                  output);
      }
  
      public void test_1() throws Exception {
          String sql = "(select A.int_test,A.string_test from (select int_test,string_test from ss_dev.test_sub_rt where id < 1000) A order by A.int_test,A.string_test) limit 1000";
  
          MySqlStatementParser parser = new MySqlStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          SQLStatement stmt = statementList.get(0);
  
          SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
  
          SQLSelect select = selectStmt.getSelect();
          assertNotNull(select.getQuery());
          MySqlSelectQueryBlock queryBlock = (MySqlSelectQueryBlock) select.getQuery();
          assertNotNull(queryBlock.getOrderBy());
  
  //        print(statementList);
  
          assertEquals(1, statementList.size());
  
          MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
          stmt.accept(visitor);
  
          assertEquals(1, visitor.getTables().size());
          assertEquals(3, visitor.getColumns().size());
          assertEquals(1, visitor.getConditions().size());
          assertEquals(0, visitor.getOrderByColumns().size());
  
  //        assertTrue(visitor.getTables().containsKey(new TableStat.Name("ub_userdiscuss")));
  
          String output = SQLUtils.toMySqlString(stmt);
          assertEquals("(SELECT A.int_test, A.string_test\n" +
                          "FROM (\n" +
                          "\tSELECT int_test, string_test\n" +
                          "\tFROM ss_dev.test_sub_rt\n" +
                          "\tWHERE id < 1000\n" +
                          ") A\n" +
                          "ORDER BY A.int_test, A.string_test)\n" +
                          "LIMIT 1000", //
                  output);
      }
  }
  