Perl: 向mysql数据库插入二进制字段, 并返回所插入记录的自动增长字段的值

#! c:/perl/bin/perl.exe use strict; use warnings; use Digest::MD5; use DBI; use DBD::mysql; my $filePath = "D://malware//ixigua.exe"; my $fileLen = -s $filePath; my $md5 = Digest::MD5->new(); open ( HFILE, "< $filePath" ) or die ("Can't open:$!"); binmode( HFILE ); $md5->addfile( *HFILE ); my $strMD5 = $md5->hexdigest(); #计算MD5值 seek( HFILE, 0, 0);  #调整文件指针至文件头,必需步骤 my $data;             #存放文件内容 my $len = read( HFILE, $data, $fileLen ); close( HFILE ); my $dbh = DBI -> connect("DBI:mysql:DB_AAA;host=192.168.22.252;user=ixigua;password=aaa123",{RaiseError=>1}); my $insertStr = "insert into `SIMPLE_BODY` ( SIMPLE_SIZE, SIMPLE_BODY) values( ?,?);"; #预留参数的位置 my $sth = $dbh->prepare( $insertStr ) or die("Cannot prepare statement:", $dbh->errstr(),"/n"); my $rc = $sth->execute($fileLen, $data) or die("Cannot execute statement:", $sth->errstr(), "/n"); my $id = $dbh->last_insert_id(undef,undef, "`SIMPLE_BODY`", "SIMPLE_BODY_KEY"); #前2个参数不用理会，第3个为数据表名，第4个具有自动增长属性的列名 print 'insert_id=',$id, "/n"; warn( $DBI::errstr ) if $DBI::err; $dbh->disconnect(); ================================================ 注释： 若数据库插入语句不用参数预留， 操作就失败，原因没有找到？ my $insertStr = " insert into `SIMPLE_BODY` ( SIMPLE_SIZE, SIMPLE_BODY) values( $fileLen, $data);"; #不预留参数而直接填充 my $sth = $dbh-> prepare( $insertStr ) or die(" Cannot prepare statement:", $dbh->errstr()," /n"); my $rc = $sth-> execute() or die(" Cannot execute statement:", $sth->errstr(), " /n");