中身

qb

#!/usr/bin/perl
use strict;

my ($time, $id, $command, $argument, @lines) = ();

while(my $line = <>){
  chomp $line;

  if(
    $line =~ /^(\d{6}\s+\d+:\d+:\d+)\s+(\d+)\s([A-Z]\w+)(.*)$/ ||
    $line =~ /^(\t\t)\s*(\d+)\s([A-Z]\w+)(.*)$/
  ){
    _flush();
    ($time, $id, $command, $argument) = ($1, $2, $3, $4);
  } else {
    $line =~ s/^\s+/ /; # 行頭の空白は１つ
    $line =~ s/\s+$//;  # 行末の空白は取り除く
    $line =~ s/^(\S)/ $1/;
    push @lines, $line;
  }
}

sub _flush {
  print sprintf("%15s %9s %-11s %s %s\n",
          $time,
          $id,
          $command,
          $argument,
          join('', @lines),);
  ($time, $id, $command, $argument, @lines) = ();
}

qbt

#!/usr/bin/perl
use strict;

my ($time, $id, $command, $argument, @lines) = ();
my $tmp = '';

while(my $line = <>){
  chomp $line;

  if(
    $line =~ /^(\d{6}\s+\d+:\d+:\d+)\s+(\d+)\s([A-Z]\w+)(.*)$/ ||
    $line =~ /^(\t\t)\s*(\d+)\s([A-Z]\w+)(.*)$/
  ){
    _flush();
    ($tmp, $id, $command, $argument) = ($1, $2, $3, $4);
    if($tmp =~ /^(\d{6}) ([ \d]\d):(\d\d):(\d\d)/){
      $time = sprintf("%06d %02d:%02d:%02d", $1, $2, $3, $4);
    }
  } else {
    $line =~ s/^\s+/ /;
    $line =~ s/\s+$//;
    $line =~ s/^(\S)/ $1/;
    push @lines, $line;
  }
}

sub _flush {
  print sprintf("%15s %9s %-11s %s %s\n",
          $time,
          $id,
          $command,
          $argument,
          join('', @lines),);
  ($id, $command, $argument, @lines) = ();
}

使い方

unixコマンドライクなフィルタのように使ってください。
qbtは拾える限り時刻を拾います。
ネーミングはQuery-log Beautifier (with Timestamp) のつもり。
必要だったら実行属性付けてください。

$ tail -f mysql.log | qbt