像关键字和反斜杠问题

Question

如果我使用“like”关键字，我无法从表中选择反斜杠。 它与德比数据库工作正常，所以我想问的是SQL不正确？或者反斜杠在h2中有特殊含义？ 谢谢:)

public class HelloWorld { 
public static void main(String... args) throws Exception { 
    // delete the database named 'test' in the user home directory 
    DeleteDbFiles.execute("~", "test", true); 
    Class.forName("org.h2.Driver"); 
    Connection conn = DriverManager.getConnection("jdbc:h2:~/test"); 
    Statement stat = conn.createStatement(); 
    stat.execute("create table test(" + 
      "id int primary key, " + 
      "name varchar(255))"); 
    try { 
     int id = 1; 
     String name = "\\"; 
     stat.execute("insert into test values("+id+",'"+name+"')"); 
     ResultSet rs = stat.executeQuery("select * from test"); 
     while(rs.next()) { 
      System.out.println(rs.getString(1)+" "+rs.getString(2)); 
     } 
     ResultSet rs2 = stat.executeQuery(
       "select * from test where name like '"+name+"%'"); 
     // ResultSet rs2 = stat.executeQuery(
       "select * from test where name = '"+name+"'"); 
     while(rs2.next()) { 
      System.out.println(rs2.getString(1)+" "+rs2.getString(2)); 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    stat.close(); 
    conn.close(); 
} 
} 

Answer 1

反斜杠是default escape character for LIKE conditions。

我想你需要使用两个反斜杠，即在Java内部，你需要编写"\\\\"。或者，也可以使用LIKE '\' ESCAPE ''（不使用转义字符）。