MariaDB，Data::UUID GUID：数据对于二进制列来说太长（16）

Question

我有一张桌子：

CREATE TABLE `sessions` (
  id BINARY(16) NOT NULL,
  PRIMARY KEY(id)
) ENGINE=InnoDB;

我创建了一个值插入到

id

字段中：

$sql = 'INSERT INTO sessions (id) VALUES(?)';
my $generator = Data::UUID->new;
my $session_id = $generator->create();
$result = $dbh->do($sql, undef, $session_id);

根据

Data::UUID

模块的文档：

# creates binary (16 byte long binary value) UUID.
$ug->create();

https://metacpan.org/pod/Data::UUID

但是当我尝试插入数据时，我从 MariaDB 收到错误：

“id”列的数据太长

如果字段有 16 个字节长并且根据文档 $session_id 的大小也是 16 个字节，为什么它太长了？

Answer 1

（不是答案，评论太长）。

我没有遇到错误。

测试于

10.6.15-MariaDB-log

。

MariaDB [asterisk]> CREATE TABLE `sessions` (
    ->   id BINARY(16) NOT NULL,
    ->   PRIMARY KEY(id)
    -> ) ENGINE=InnoDB;
Query OK, 0 rows affected (0.052 sec)

MariaDB [asterisk]>
MariaDB [asterisk]>
MariaDB [asterisk]>
MariaDB [asterisk]> select * from sessions;
+------------------+
| id               |
+------------------+
| ▒▒▒f▒▒▒▒▒\#z          |
+------------------+
1 row in set (0.000 sec)

---

使用Perl脚本

use strict; 
use warnings;
use DBI; 
use Config::IniFiles;
use Data::UUID;
###################################################### DB connection ###########################################################
                   my $cfg = Config::IniFiles -> new( -file => '/etc/db.ini' );
                   my $dbinst = $cfg -> val('AST', 'DBINST');
                   my $dbhost = $cfg -> val('AST', 'DBHOST');
                   my $dbuser = $cfg -> val('AST', 'DBUSER');
                   my $dbpass = $cfg -> val('AST', 'DBPASS');
                   
   my $dbhA  = DBI->connect( "dbi:mysql:$dbinst:$dbhost",$dbuser,$dbpass, 
                               { RaiseError => 0,
                                 PrintError => 1,
                                 AutoCommit => 0,
                               }
                            ) or die $DBI::errstr;   
###################################################### DB connection ###########################################################

my $generator = Data::UUID->new;
my $session_id = $generator->create();


my  $query_insert_data = "INSERT INTO sessions ( id  ) VALUES(?)";
my  $statement_data = $dbhA->prepare($query_insert_data);
    $statement_data->execute( $session_id );           
    $statement_data->finish();

################## Close DB connection ##################
    warn $DBI::errstr if $DBI::err;
         $dbhA->commit(); 
         $dbhA->disconnect();
################## Close DB connection ##################