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.sql.parser;
  
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.ast.expr.SQLInListExpr;
  import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlInsertStatement;
  import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
  import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlOutputVisitor;
  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 SQLMergeTest extends TestCase {
      protected String sql;
  
      protected void setUp() throws Exception {
          sql = "SELECT /*mark for picman*/ * FROM WP_ALBUM WHERE MEMBER_ID = ? AND ID IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
  
          sql = "SELECT * FROM my_table WHERE TRUNC(SYSDATE) = DATE '2002-10-03';";
      }
  
      public void test_merge_1() throws Exception {
          String result = merge();
          System.out.println(result);
      }
  
      public void test_merge_2() throws Exception {
          String result = merge2();
          System.out.println(result);
      }
  
      public void test_perf() {
          for (int i = 0; i < 10; ++i) {
              perf();
          }
      }
  
      void perf() {
          long startMillis = System.currentTimeMillis();
          for (int i = 0; i < 1000 * 1000; ++i) {
              merge();
          }
          long millis = System.currentTimeMillis() - startMillis;
          System.out.println(millis);
      }
  
      private String merge() {
          StringBuilder out = new StringBuilder();
          OracleOutputVisitor visitor = new OracleOutputVisitor(out) {
              public boolean visit(SQLInListExpr x) {
                  x.getExpr().accept(this);
  
                  if (x.isNot()) {
                      print(" NOT IN (##)");
                  } else {
                      print(" IN (##)");
                  }
                  return false;
              }
          };
  
          OracleStatementParser parser = new OracleStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          for (SQLStatement statement : statementList) {
              statement.accept(visitor);
              visitor.println();
          }
  
          return out.toString();
      }
  
      private String merge2() {
          String sql = "INSERT INTO T (F1, F2, F3, F4, F5) VALUES (?, ?, ?, ?, ?), (?, ?, ?, ?, ?), (?, ?, ?, ?, ?)";
  
          StringBuilder out = new StringBuilder();
          MySqlOutputVisitor visitor = new MySqlOutputVisitor(out) {
              public boolean visit(SQLInListExpr x) {
                  x.getExpr().accept(this);
  
                  if (x.isNot()) {
                      print(" NOT IN (##)");
                  } else {
                      print(" IN (##)");
                  }
                  return false;
              }
  
              @Override
              public boolean visit(MySqlInsertStatement x) {
                  print("INSERT ");
  
                  if (x.isLowPriority()) {
                      print("LOW_PRIORITY ");
                  }
  
                  if (x.isDelayed()) {
                      print("DELAYED ");
                  }
  
                  if (x.isHighPriority()) {
                      print("HIGH_PRIORITY ");
                  }
  
                  if (x.isIgnore()) {
                      print("IGNORE ");
                  }
  
                  print("INTO ");
  
                  x.getTableSource().accept(this);
  
                  if (x.getColumns().size() > 0) {
                      print(" (");
                      for (int i = 0, size = x.getColumns().size(); i < size; ++i) {
                          if (i != 0) {
                              print(", ");
                          }
                          x.getColumns().get(i).accept(this);
                      }
                      print(")");
                  }
  
                  if (!x.getValuesList().isEmpty()) {
                      print(" VALUES ");
                      int size = x.getValuesList().size();
                      if (size == 0) {
                          print("()");
                      } else {
                          for (int i = 0; i < 1; ++i) {
                              if (i != 0) {
                                  print(", ");
                              }
                              x.getValuesList().get(i).accept(this);
                          }
                      }
                  }
                  if (x.getQuery() != null) {
                      print(" ");
                      x.getQuery().accept(this);
                  }
  
                  if (!x.getDuplicateKeyUpdate().isEmpty()) {
                      print(" ON DUPLICATE KEY UPDATE ");
                      printAndAccept(x.getDuplicateKeyUpdate(), ", ");
                  }
  
                  return false;
              }
          };
  
          MySqlStatementParser parser = new MySqlStatementParser(sql);
          List<SQLStatement> statementList = parser.parseStatementList();
          for (SQLStatement statement : statementList) {
              statement.accept(visitor);
              visitor.println();
          }
  
          return out.toString();
      }
  }
  