MySQL在ROW模式下通过binlog提取SQL语句

15230阅读　0评论2016-09-03　dba_life
分类：Mysql/postgreSQL

基于row模式的binlog，生成DML(insert/update/delete)的rollback语句
通过mysqlbinlog -v 解析binlog生成可读的sql文件
提取需要处理的有效sql
  "### "开头的行.如果输入的start-position位于某个event group中间，则会导致"无法识别event"错误


将INSERT/UPDATE/DELETE 的sql反转,并且1个完整sql只能占1行
  INSERT: INSERT INTO => DELETE FROM, SET => WHERE
  UPDATE: WHERE => SET, SET => WHERE
  DELETE: DELETE FROM => INSERT INTO, WHERE => SET
用列名替换位置@{1,2,3}
  通过desc table获得列顺序及对应的列名
  特殊列类型value做特别处理
逆序


注意:
  表结构与现在的表结构必须相同[谨记]
  由于row模式是幂等的，并且恢复是一次性，所以只提取sql，不提取BEGIN/COMMIT
  只能对INSERT/UPDATE/DELETE进行处理

mysql> select * from yoon;
+----------+------------+-----------+---------------------+
| actor_id | first_name | last_name | last_update         |
+----------+------------+-----------+---------------------+
|        1 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        2 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        3 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        4 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        5 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        6 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        7 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        8 | HANK       | YOON      | 2006-02-15 04:34:33 |
|        9 | HANK       | YOON      | 2006-02-15 04:34:33 |
|       10 | HANK       | YOON      | 2006-02-15 04:34:33 |
|       11 | HANK       | YOON      | 2006-02-15 04:34:33 |
+----------+------------+-----------+---------------------+
11 rows in set (0.00 sec)


mysql> delete from yoon;
Query OK, 11 rows affected (1.03 sec)


mysql> select * from yoon;
Empty set (0.00 sec)

命令之间的空格一定要注意，否则就会无法提取SQL语句：
[root@hank-yoon data]# perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/export/data/mysql/data/yoon.sql' -u 'root' -p 'yoon'
Warning: Using a password on the command line interface can be insecure.
[root@hank-yoon data]# ls
auto.cnf            hank     ibdata2      ib_logfile1  modify.pl  mysql-bin.000001  performance_schema  test  yoon.sql
binlog-rollback.pl  ibdata1  ib_logfile0  ib_logfile2  mysql      mysql-bin.index   sakila              yoon
[root@hank-yoon data]# cat yoon.sql 
INSERT INTO `yoon`.`yoon` SET `actor_id`=11, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=10, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=9, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=8, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=7, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=6, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=5, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=4, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=3, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=2, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
INSERT INTO `yoon`.`yoon` SET `actor_id`=1, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);

mysql> INSERT INTO `yoon`.`yoon` SET `actor_id`=11, `first_name`='HANK', `last_name`='YOON', `last_update`=from_unixtime(1139949273);
Query OK, 1 row affected (0.01 sec)


mysql> select * from yoon;
+----------+------------+-----------+---------------------+
| actor_id | first_name | last_name | last_update         |
+----------+------------+-----------+---------------------+
|       11 | HANK       | YOON      | 2006-02-15 04:34:33 |
+----------+------------+-----------+---------------------+



  1. #!/usr/lib/perl -w

  3. use strict;
  4. use warnings;

  6. use Class::Struct;
  7. use Getopt::Long qw(:config no_ignore_case);                    # GetOption
  8. # register handler system signals
  9. use sigtrap 'handler', \&sig_int, 'normal-signals';

  11. # catch signal
  12. sub sig_int(){
  13.     my ($signals) = @_;
  14.     print STDERR "# Caught SIG$signals.\n";
  15.     exit 1;
  16. }

  18. my %opt;
  19. my $srcfile;
  20. my $host = '127.0.0.1';
  21. my $port = 3306;
  22. my ($user,$pwd);
  23. my ($MYSQL, $MYSQLBINLOG, $ROLLBACK_DML);
  24. my $outfile = '/dev/null';
  25. my (%do_dbs,%do_tbs);

  27. # tbname=>tbcol, tbcol: @n=>colname,type
  28. my %tbcol_pos;

  30. my $SPLITER_COL = ',';
  31. my $SQLTYPE_IST = 'INSERT';
  32. my $SQLTYPE_UPD = 'UPDATE';
  33. my $SQLTYPE_DEL = 'DELETE';
  34. my $SQLAREA_WHERE = 'WHERE';
  35. my $SQLAREA_SET = 'SET';

  37. my $PRE_FUNCT = '========================== ';

  39. # =========================================================
  40. # 基于row模式的binlog，生成DML(insert/update/delete)的rollback语句
  41. # 通过mysqlbinlog -v 解析binlog生成可读的sql文件
  42. # 提取需要处理的有效sql
  43. #     "### "开头的行.如果输入的start-position位于某个event group中间，则会导致"无法识别event"错误
  44. #
  45. # 将INSERT/UPDATE/DELETE 的sql反转,并且1个完整sql只能占1行
  46. #     INSERT: INSERT INTO => DELETE FROM, SET => WHERE
  47. #     UPDATE: WHERE => SET, SET => WHERE
  48. #     DELETE: DELETE FROM => INSERT INTO, WHERE => SET
  49. # 用列名替换位置@{1,2,3}
  50. #     通过desc table获得列顺序及对应的列名
  51. #     特殊列类型value做特别处理
  52. # 逆序
  53. # 
  54. # 注意:
  55. #     表结构与现在的表结构必须相同[谨记]
  56. #     由于row模式是幂等的，并且恢复是一次性，所以只提取sql，不提取BEGIN/COMMIT
  57. #     只能对INSERT/UPDATE/DELETE进行处理
  58. # ========================================================
  59. sub main{

  61.     # get input option
  62.     &get_options();

  64.     # 
  65.     &init_tbcol();

  67.     #
  68.     &do_binlog_rollback();
  69. }

  71. &main();


  74. # ----------------------------------------------------------------------------------------
  75. # Func : get options and set option flag 
  76. # ----------------------------------------------------------------------------------------
  77. sub get_options{
  78.     #Get options info
  79.     GetOptions(\%opt,
  80.         'help',                    # OUT : print help info 
  81.         'f|srcfile=s',            # IN : binlog file
  82.         'o|outfile=s',            # out : output sql file
  83.         'h|host=s',                # IN : host
  84.         'u|user=s', # IN : user
  85.         'p|password=s', # IN : password
  86.         'P|port=i',                # IN : port
  87.         'start-datetime=s',        # IN : start datetime
  88.         'stop-datetime=s',        # IN : stop datetime
  89.         'start-position=i',        # IN : start position
  90.         'stop-position=i',        # IN : stop position
  91.         'd|database=s',            # IN : database, split comma
  92.         'T|table=s',            # IN : table, split comma
  93.         'i|ignore',                # IN : ignore binlog check ddl and so on
  94.         'debug',                # IN : print debug information
  95.      ) or print_usage();

  97.     if (!scalar(%opt)) {
  98.         &print_usage();
  99.     }

  101.     # Handle for options
  102.     if ($opt{'f'}){
  103.         $srcfile = $opt{'f'};
  104.     }else{
  105.         &merror("please input binlog file");
  106.     }

  108.     $opt{'h'} and $host = $opt{'h'};
  109.     $opt{'u'} and $user = $opt{'u'};
  110.     $opt{'p'} and $pwd = $opt{'p'};
  111.     $opt{'P'} and $port = $opt{'P'};
  112.     if ($opt{'o'}) {
  113.         $outfile = $opt{'o'};
  114.         # 清空 outfile
  115.         `echo '' > $outfile`;
  116.     }

  118.     # 
  119.     $MYSQL = qq{mysql -h$host -u$user -p'$pwd' -P$port};
  120.     &mdebug("get_options::MYSQL\n\t$MYSQL");

  122.     # 提取binlog,不需要显示列定义信息，用-v，而不用-vv
  123.     $MYSQLBINLOG = qq{mysqlbinlog -v};
  124.     $MYSQLBINLOG .= " --start-position=".$opt{'start-position'} if $opt{'start-position'};
  125.     $MYSQLBINLOG .= " --stop-position=".$opt{'stop-position'} if $opt{'stop-postion'};
  126.     $MYSQLBINLOG .= " --start-datetime='".$opt{'start-datetime'}."'" if $opt{'start-datetime'};
  127.     $MYSQLBINLOG .= " --stop-datetime='$opt{'stop-datetime'}'" if $opt{'stop-datetime'};
  128.     $MYSQLBINLOG .= " $srcfile";
  129.     &mdebug("get_options::MYSQLBINLOG\n\t$MYSQLBINLOG");

  131.     # 检查binlog中是否含有 ddl sql: CREATE|ALTER|DROP|RENAME
  132.     &check_binlog() unless ($opt{'i'});

  134.     # 不使用mysqlbinlog过滤，USE dbname;方式可能会漏掉某些sql，所以不在mysqlbinlog过滤
  135.     # 指定数据库
  136.     if ($opt{'d'}){
  137.         my @dbs = split(/,/,$opt{'d'});
  138.         foreach my $db (@dbs){
  139.             $do_dbs{$db}=1;
  140.         }
  141.     }

  143.     # 指定表
  144.     if ($opt{'T'}){
  145.         my @tbs = split(/,/,$opt{'T'});
  146.         foreach my $tb (@tbs){
  147.             $do_tbs{$tb}=1;
  148.         }
  149.     }

  151.     # 提取有效DML SQL
  152.     $ROLLBACK_DML = $MYSQLBINLOG." | grep '^### '";
  153.     # 去掉注释: '### ' -> ''
  154.     # 删除首尾空格
  155.     $ROLLBACK_DML .= " | sed 's/###\\s*//g;s/\\s*\$//g'";
  156.     &mdebug("rollback dml\n\t$ROLLBACK_DML");
  157.     
  158.     # 检查内容是否为空
  159.     my $cmd = "$ROLLBACK_DML | wc -l";
  160.     &mdebug("check contain dml sql\n\t$cmd");
  161.     my $size = `$cmd`;
  162.     chomp($size);
  163.     unless ($size >0){
  164.         &merror("binlog DML is empty:$ROLLBACK_DML");
  165.     };

  167. }    


  170. # ----------------------------------------------------------------------------------------
  171. # Func : check binlog contain DDL
  172. # ----------------------------------------------------------------------------------------
  173. sub check_binlog{
  174.     &mdebug("$PRE_FUNCT check_binlog");
  175.     my $cmd = "$MYSQLBINLOG ";
  176.     $cmd .= " | grep -E -i '^(CREATE|ALTER|DROP|RENAME)' ";
  177.     &mdebug("check binlog has DDL cmd\n\t$cmd");
  178.     my $ddlcnt = `$cmd`;
  179.     chomp($ddlcnt);

  181.     my $ddlnum = `$cmd | wc -l`;
  182.     chomp($ddlnum);
  183.     my $res = 0;
  184.     if ($ddlnum>0){
  185.         # 在ddl sql前面加上前缀<DDL>
  186.         $ddlcnt = `echo '$ddlcnt' | sed 's/^//g'`;
  187.         &merror("binlog contain $ddlnum DDL:$MYSQLBINLOG. ddl sql:\n$ddlcnt");
  188.     }

  190.     return $res;
  191. }


  194. # ----------------------------------------------------------------------------------------
  195. # Func : init all table column order
  196. #        if input --database --table params, only get set table column order
  197. # ----------------------------------------------------------------------------------------
  198. sub init_tbcol{
  199.     &mdebug("$PRE_FUNCT init_tbcol");
  200.     # 提取DML语句
  201.     my $cmd .= "$ROLLBACK_DML | grep -E '^(INSERT|UPDATE|DELETE)'";
  202.     # 提取表名，并去重
  203.     #$cmd .= " | awk '{if (\$1 ~ \"^UPDATE\") {print \$2}else {print \$3}}' | uniq ";
  204.     $cmd .= " | awk '{if (\$1 ~ \"^UPDATE\") {print \$2}else {print \$3}}' | sort | uniq ";
  205.     &mdebug("get table name cmd\n\t$cmd");
  206.     open ALLTABLE, "$cmd | " or die "can't open file:$cmd\n";

  208.     while (my $tbname = <ALLTABLE>){
  209.         chomp($tbname);
  210.         #if (exists $tbcol_pos{$tbname}){
  211.         #    next;
  212.         #}
  213.         &init_one_tbcol($tbname) unless (&ignore_tb($tbname));
  214.         
  215.     }
  216.     close ALLTABLE or die "can't close file:$cmd\n";

  218.     # init tb col
  219.     foreach my $tb (keys %tbcol_pos){
  220.         &mdebug("tbname->$tb");
  221.         my %colpos = %{$tbcol_pos{$tb}};
  222.         foreach my $pos (keys %colpos){
  223.             my $col = $colpos{$pos};
  224.             my ($cname,$ctype) = split(/$SPLITER_COL/, $col);
  225.             &mdebug("\tpos->$pos,cname->$cname,ctype->$ctype");
  226.         }
  227.     }
  228. };


  231. # ----------------------------------------------------------------------------------------
  232. # Func : init one table column order
  233. # ----------------------------------------------------------------------------------------
  234. sub init_one_tbcol{
  235.     my $tbname = shift;
  236.     &mdebug("$PRE_FUNCT init_one_tbcol");
  237.     # 获取表结构及列顺序
  238.     my $cmd = $MYSQL." --skip-column-names --silent -e 'desc $tbname'";
  239.     # 提取列名，并拼接
  240.     $cmd .= " | awk -F\'\\t\' \'{print NR\"$SPLITER_COL`\"\$1\"`$SPLITER_COL\"\$2}'";
  241.     &mdebug("get table column infor cmd\n\t$cmd");
  242.     open TBCOL,"$cmd | " or die "can't open desc $tbname;";

  244.     my %colpos;
  245.     while (my $line = <TBCOL>){
  246.         chomp($line);
  247.         my ($pos,$col,$coltype) = split(/$SPLITER_COL/,$line);
  248.         &mdebug("linesss=$line\n\t\tpos=$pos\n\t\tcol=$col\n\t\ttype=$coltype");
  249.         $colpos{$pos} = $col.$SPLITER_COL.$coltype;
  250.     }
  251.     close TBCOL or die "can't colse desc $tbname";

  253.     $tbcol_pos{$tbname} = \%colpos;
  254. }


  257. # ----------------------------------------------------------------------------------------
  258. # Func : rollback sql:    INSERT/UPDATE/DELETE
  259. # ----------------------------------------------------------------------------------------
  260. sub do_binlog_rollback{
  261.     my $binlogfile = "$ROLLBACK_DML ";
  262.     &mdebug("$PRE_FUNCT do_binlog_rollback");

  264.     # INSERT|UPDATE|DELETE
  265.     my $sqltype;
  266.     # WHERE|SET
  267.     my $sqlarea;
  268.     
  269.     my ($tbname, $sqlstr) = ('', '');
  270.     my ($notignore, $isareabegin) = (0,0);

  272.     # output sql file
  273.     open SQLFILE, ">> $outfile" or die "Can't open sql file:$outfile";

  275.     # binlog file
  276.     open BINLOG, "$binlogfile |" or die "Can't open file: $binlogfile";
  277.     while (my $line = <BINLOG>){
  278.         chomp($line);
  279.         if ($line =~ /^(INSERT|UPDATE|DELETE)/){
  280.             # export sql
  281.             if ($sqlstr ne ''){
  282.                 $sqlstr .= ";\n";
  283.                 print SQLFILE $sqlstr;
  284.                 &mdebug("export sql\n\t".$sqlstr);
  285.                 $sqlstr = '';
  286.             }

  288.             if ($line =~ /^INSERT/){
  289.                 $sqltype = $SQLTYPE_IST;
  290.                 $tbname = `echo '$line' | awk '{print \$3}'`;
  291.                 chomp($tbname);
  292.                 $sqlstr = qq{DELETE FROM $tbname};
  293.             }elsif ($line =~ /^UPDATE/){
  294.                 $sqltype = $SQLTYPE_UPD;
  295.                 $tbname = `echo '$line' | awk '{print \$2}'`;
  296.                 chomp($tbname);
  297.                 $sqlstr = qq{UPDATE $tbname};
  298.             }elsif ($line =~ /^DELETE/){
  299.                 $sqltype = $SQLTYPE_DEL;    
  300.                 $tbname = `echo '$line' | awk '{print \$3}'`;
  301.                 chomp($tbname);
  302.                 $sqlstr = qq{INSERT INTO $tbname};
  303.             }

  305.             # check ignore table
  306.             if(&ignore_tb($tbname)){
  307.                 $notignore = 0;
  308.                 &mdebug("#IGNORE#:line:".$line);
  309.                 $sqlstr = '';
  310.             }else{
  311.                 $notignore = 1;
  312.                 &mdebug("#DO#:line:".$line);
  313.             }
  314.         }else {
  315.             if($notignore){
  316.                 &merror("can't get tbname") unless (defined($tbname));
  317.                 if ($line =~ /^WHERE/){
  318.                     $sqlarea = $SQLAREA_WHERE;
  319.                     $sqlstr .= qq{ SET};
  320.                     $isareabegin = 1;
  321.                 }elsif ($line =~ /^SET/){
  322.                     $sqlarea = $SQLAREA_SET;
  323.                     $sqlstr .= qq{ WHERE};
  324.                     $isareabegin = 1;
  325.                 }elsif ($line =~ /^\@/){
  326.                     $sqlstr .= &deal_col_value($tbname, $sqltype, $sqlarea, $isareabegin, $line);
  327.                     $isareabegin = 0;
  328.                 }else{
  329.                     &mdebug("::unknown sql:".$line);
  330.                 }
  331.             }
  332.         }
  333.     }
  334.     # export last sql
  335.     if ($sqlstr ne ''){
  336.         $sqlstr .= ";\n";
  337.         print SQLFILE $sqlstr;
  338.         &mdebug("export sql\n\t".$sqlstr);
  339.     }
  340.     
  341.     close BINLOG or die "Can't close binlog file: $binlogfile";

  343.     close SQLFILE or die "Can't close out sql file: $outfile";

  345.     # 逆序
  346.     # 1!G: 只有第一行不执行G, 将hold space中的内容append回到pattern space
  347.     # h: 将pattern space 拷贝到hold space
  348.     # $!d: 除最后一行都删除
  349.     my $invert = "sed -i '1!G;h;\$!d' $outfile";
  350.     my $res = `$invert`;
  351.     &mdebug("inverter order sqlfile :$invert");
  352. }

  354. # ----------------------------------------------------------------------------------------
  355. # Func : transfer column pos to name
  356. #    deal column value
  357. #
  358. # &deal_col_value($tbname, $sqltype, $sqlarea, $isareabegin, $line);
  359. # ----------------------------------------------------------------------------------------
  360. sub deal_col_value($$$$$){
  361.     my ($tbname, $sqltype, $sqlarea, $isareabegin, $line) = @_;
  362.     &mdebug("$PRE_FUNCT deal_col_value");
  363.     &mdebug("input:tbname->$tbname,type->$sqltype,area->$sqlarea,areabegin->$isareabegin,line->$line");
  364.     my @vals = split(/=/, $line);
  365.     my $pos = substr($vals[0],1);
  366.     my $valstartpos = length($pos)+2;
  367.     my $val = substr($line,$valstartpos);
  368.     my %tbcol = %{$tbcol_pos{$tbname}};
  369.     my ($cname,$ctype) = split(/$SPLITER_COL/,$tbcol{$pos});
  370.     &merror("can't get $tbname column $cname type") unless (defined($cname) || defined($ctype));
  371.     &mdebug("column infor:cname->$cname,type->$ctype");

  373.     # join str
  374.     my $joinstr;
  375.     if ($isareabegin){
  376.         $joinstr = ' ';
  377.     }else{
  378.         # WHERE 被替换为 SET, 使用 , 连接
  379.         if ($sqlarea eq $SQLAREA_WHERE){
  380.             $joinstr = ', ';
  381.         # SET 被替换为 WHERE 使用 AND 连接
  382.         }elsif ($sqlarea eq $SQLAREA_SET){
  383.             $joinstr = ' AND ';
  384.         }else{
  385.             &merror("!!!!!!The scripts error");
  386.         }
  387.     }
  388.     
  389.     # 
  390.     my $newline = $joinstr;

  392.     # NULL value
  393.     if (($val eq 'NULL') && ($sqlarea eq $SQLAREA_SET)){
  394.         $newline .= qq{ $cname IS NULL};
  395.     }else{
  396.         # timestamp: record seconds
  397.         if ($ctype eq 'timestamp'){
  398.             $newline .= qq{$cname=from_unixtime($val)};
  399.         # datetime: @n=yyyy-mm-dd hh::ii::ss
  400.         }elsif ($ctype eq 'datetime'){
  401.             $newline .= qq{$cname='$val'};
  402.         }else{
  403.             $newline .= qq{$cname=$val};
  404.         }
  405.     }
  406.     &mdebug("\told>$line\n\tnew>$newline");
  407.     
  408.     return $newline;
  409. }

  411. # ----------------------------------------------------------------------------------------
  412. # Func : check is ignore table
  413. # params: IN table full name # format:`dbname`.`tbname`
  414. # RETURN：
  415. #        0 not ignore
  416. #        1 ignore
  417. # ----------------------------------------------------------------------------------------
  418. sub ignore_tb($){
  419.     my $fullname = shift;
  420.     # 删除`
  421.     $fullname =~ s/`//g;
  422.     my ($dbname,$tbname) = split(/\./,$fullname);
  423.     my $res = 0;
  424.     
  425.     # 指定了数据库
  426.     if ($opt{'d'}){
  427.         # 与指定库相同
  428.         if ($do_dbs{$dbname}){
  429.             # 指定表
  430.             if ($opt{'T'}){
  431.                 # 与指定表不同
  432.                 unless ($do_tbs{$tbname}){
  433.                     $res = 1;
  434.                 }
  435.             }
  436.         # 与指定库不同
  437.         }else{
  438.             $res = 1;
  439.         }
  440.     }
  441.     #&mdebug("Table check ignore:$fullname->$res");
  442.     return $res;
  443. }


  446. # ----------------------------------------------------------------------------------------
  447. # Func : print debug msg
  448. # ----------------------------------------------------------------------------------------
  449. sub mdebug{
  450.     my (@msg) = @_;
  451.     print "@msg\n" if ($opt{'debug'});
  452. }


  455. # ----------------------------------------------------------------------------------------
  456. # Func : print error msg and exit
  457. # ----------------------------------------------------------------------------------------
  458. sub merror{
  459.     my (@msg) = @_;
  460.     print ":@msg\n";
  461.     &print_usage();
  462.     exit(1);
  463. }

  465. # ----------------------------------------------------------------------------------------
  466. # Func : print usage
  467. # ----------------------------------------------------------------------------------------
  468. sub print_usage{
  469.     print <<EOF;
  470. ==========================================================================================
  471. Command line options :
  472.     --help                # OUT : print help info 
  473.     -f, --srcfile            # IN : binlog file. [required]
  474.     -o, --outfile            # OUT : output sql file. [required]
  475.     -h, --host            # IN : host. default '127.0.0.1'
  476.     -u, --user            # IN : user. [required]
  477.     -p, --password            # IN : password. [required] 
  478.     -P, --port            # IN : port. default '3306'
  479.     --start-datetime        # IN : start datetime
  480.     --stop-datetime            # IN : stop datetime
  481.     --start-position        # IN : start position
  482.     --stop-position            # IN : stop position
  483.     -d, --database            # IN : database, split comma
  484.     -T, --table            # IN : table, split comma. [required] set -d
  485.     -i, --ignore            # IN : ignore binlog check contain DDL(CREATE|ALTER|DROP|RENAME)
  486.     --debug                # IN : print debug information

  488. Sample :
  489.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' 
  490.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' -i
  491.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' --debug
  492.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -h '192.168.1.2' -u 'user' -p 'pwd' -P 3307
  493.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' --start-position=107
  494.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' --start-position=107 --stop-position=10000
  495.    shell> perl binlog-rollback.pl -f 'mysql-bin.000001' -o '/tmp/t.sql' -u 'user' -p 'pwd' -d 'db1,db2'
  496.    shell> perl binlog-rollback.pl -f 'mysql-bin.0000*' -o '/tmp/t.sql' -u 'user' -p 'pwd' -d 'db1,db2' -T 'tb1,tb2'
  497. ==========================================================================================
  498. EOF
  499.     exit; 
  500. }


  503. 1;
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