#!/usr/bin/perl

eval 'exec /usr/bin/perl  -S $0 ${1+"$@"}'
    if 0; # not running under some shell

# This is a program to load files into MySQL in parallel.
#
# This program is copyright (c) 2007 Baron Schwartz.  Feedback and improvements
# are welcome.
#
# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, version 2; OR the Perl Artistic License.  On UNIX and similar
# systems, you can issue `man perlgpl' or `man perlartistic' to read these
# licenses.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA  02111-1307  USA.

# TODO: wrap float columns in CONVERT so they'll restore correctly.
# TODO: wrap character columns in CONVERT so can specify a charset explicitly.
# TODO: write out progress, checkpoint, and allow resuming.

use strict;
use warnings FATAL => 'all';

our $VERSION = '1.0.6';
our $DISTRIB = '1877';
our $SVN_REV = sprintf("%d", map { $_ || 0 } q$Revision: 1871 $ =~ m/(\d+)/g);

# ###########################################################################
# OptionParser package 1844
# ###########################################################################
use strict;
use warnings FATAL => 'all';

package OptionParser;

use Getopt::Long;
use List::Util qw(max);
use English qw(-no_match_vars);

sub new {
   my ( $class, @opts ) = @_;
   my %key_seen;
   my %long_seen;
   my %key_for;
   my %defaults;
   my @mutex;
   my @atleast1;
   my %long_for;
   my %disables;
   my %copyfrom;
   unshift @opts,
      { s => 'help',    d => 'Show this help message' },
      { s => 'version', d => 'Output version information and exit' };
   foreach my $opt ( @opts ) {
      if ( ref $opt ) {
         my ( $long, $short ) = $opt->{s} =~ m/^([\w-]+)(?:\|([^!+=]*))?/;
         $opt->{k} = $short || $long;
         $key_for{$long} = $opt->{k};
         $long_for{$opt->{k}} = $long;
         $long_for{$long} = $long;
         $opt->{l} = $long;
         die "Duplicate option $opt->{k}" if $key_seen{$opt->{k}}++;
         die "Duplicate long option $opt->{l}" if $long_seen{$opt->{l}}++;
         $opt->{t} = $short;
         $opt->{n} = $opt->{s} =~ m/!/;
         $opt->{g} ||= 'o';
         if ( (my ($y) = $opt->{s} =~ m/=([mdHhAaz])/) ) {
            $ENV{MKDEBUG} && _d("Option $opt->{k} type: $y");
            $opt->{y} = $y;
            $opt->{s} =~ s/=./=s/;
         }
         if ( $opt->{d} =~ m/required/ ) {
            $opt->{r} = 1;
            $ENV{MKDEBUG} && _d("Option $opt->{k} is required");
         }
         if ( (my ($def) = $opt->{d} =~ m/default\b(?: ([^)]+))?/) ) {
            $defaults{$opt->{k}} = defined $def ? $def : 1;
            $ENV{MKDEBUG} && _d("Option $opt->{k} has a default");
         }
         if ( (my ($dis) = $opt->{d} =~ m/(disables .*)/) ) {
            $disables{$opt->{k}} = [ $class->get_participants($dis) ];
            $ENV{MKDEBUG} && _d("Option $opt->{k} $dis");
         }
      }
      else { # It's an instruction.

         if ( $opt =~ m/at least one|mutually exclusive|one and only one/ ) {
            my @participants = map {
                  die "No such option '$_' in $opt" unless $long_for{$_};
                  $long_for{$_};
               } $class->get_participants($opt);
            if ( $opt =~ m/mutually exclusive|one and only one/ ) {
               push @mutex, \@participants;
               $ENV{MKDEBUG} && _d(@participants, ' are mutually exclusive');
            }
            if ( $opt =~ m/at least one|one and only one/ ) {
               push @atleast1, \@participants;
               $ENV{MKDEBUG} && _d(@participants, ' require at least one');
            }
         }
         elsif ( $opt =~ m/default to/ ) {
            my @participants = map {
                  die "No such option '$_' in $opt" unless $long_for{$_};
                  $key_for{$_};
               } $class->get_participants($opt);
            $copyfrom{$participants[0]} = $participants[1];
            $ENV{MKDEBUG} && _d(@participants, ' copy from each other');
         }

      }
   }

   if ( $ENV{MKDEBUG} ) {
      my $text = do {
         local $RS = undef;
         open my $fh, "<", $PROGRAM_NAME
            or die "Can't open $PROGRAM_NAME: $OS_ERROR";
         <$fh>;
      };
      my %used = map { $_ => 1 } $text =~ m/\$opts\{'?([\w-]+)'?\}/g;
      my @unused;
      my @undefined;
      my %option_exists;
      foreach my $opt ( @opts ) {
         next unless ref $opt;
         my $key = $opt->{k};
         $option_exists{$key}++;
         next if $opt->{l} =~ m/^(?:help|version|defaults-file|database|charset
                                    |password|port|socket|user|host)$/x
              || $disables{$key};
         push @unused, $key unless $used{$key};
      }
      foreach my $key ( keys %used ) {
         push @undefined, $key unless $option_exists{$key};
      }
      if ( @unused || @undefined ) {
         die "The following command-line options are unused: "
            . join(',', @unused)
            . ' The following are undefined: '
            . join(',', @undefined);
      }
   }

   foreach my $dis ( keys %disables ) {
      $disables{$dis} = [ map {
            die "No such option '$_' while processing $dis" unless $long_for{$_};
            $long_for{$_};
         } @{$disables{$dis}} ];
   }

   return bless {
      specs => [ grep { ref $_ } @opts ],
      notes => [],
      instr => [ grep { !ref $_ } @opts ],
      mutex => \@mutex,
      defaults => \%defaults,
      long_for => \%long_for,
      atleast1 => \@atleast1,
      disables => \%disables,
      key_for  => \%key_for,
      copyfrom => \%copyfrom,
      strict   => 1,
      groups   => [ { k => 'o', d => 'Options' } ],
   }, $class;
}

sub get_participants {
   my ( $self, $str ) = @_;
   my @participants;
   foreach my $thing ( $str =~ m/(--?[\w-]+)/g ) {
      if ( (my ($long) = $thing =~ m/--(.+)/) ) {
         push @participants, $long;
      }
      else {
         foreach my $short ( $thing =~ m/([^-])/g ) {
            push @participants, $short;
         }
      }
   }
   $ENV{MKDEBUG} && _d("Participants for $str: ", @participants);
   return @participants;
}

sub parse {
   my ( $self, %defaults ) = @_;
   my @specs = @{$self->{specs}};
   my %factor_for = (k => 1_024, M => 1_048_576, G => 1_073_741_824);

   my %opt_seen;
   my %vals = %{$self->{defaults}};
   @vals{keys %defaults} = values %defaults;
   foreach my $spec ( @specs ) {
      $vals{$spec->{k}} = undef unless defined $vals{$spec->{k}};
      $opt_seen{$spec->{k}} = 1;
   }

   foreach my $key ( keys %defaults ) {
      die "Cannot set default for non-existent option '$key'\n"
         unless $opt_seen{$key};
   }

   Getopt::Long::Configure('no_ignore_case', 'bundling');
   GetOptions( map { $_->{s} => \$vals{$_->{k}} } @specs )
      or $self->error('Error parsing options');

   if ( $vals{version} ) {
      my $prog = $self->prog;
      printf("%s  Ver %s Distrib %s Changeset %s\n",
         $prog, $main::VERSION, $main::DISTRIB, $main::SVN_REV);
      exit(0);
   }

   if ( @ARGV && $self->{strict} ) {
      $self->error("Unrecognized command-line options @ARGV");
   }

   foreach my $dis ( grep { defined $vals{$_} } keys %{$self->{disables}} ) {
      my @disses = map { $self->{key_for}->{$_} } @{$self->{disables}->{$dis}};
      $ENV{MKDEBUG} && _d("Unsetting options: ", @disses);
      @vals{@disses} = map { undef } @disses;
   }

   foreach my $spec ( grep { $_->{r} } @specs ) {
      if ( !defined $vals{$spec->{k}} ) {
         $self->error("Required option --$spec->{l} must be specified");
      }
   }

   foreach my $mutex ( @{$self->{mutex}} ) {
      my @set = grep { defined $vals{$self->{key_for}->{$_}} } @$mutex;
      if ( @set > 1 ) {
         my $note = join(', ',
            map { "--$self->{long_for}->{$_}" }
                @{$mutex}[ 0 .. scalar(@$mutex) - 2] );
         $note .= " and --$self->{long_for}->{$mutex->[-1]}"
               . " are mutually exclusive.";
         $self->error($note);
      }
   }

   foreach my $required ( @{$self->{atleast1}} ) {
      my @set = grep { defined $vals{$self->{key_for}->{$_}} } @$required;
      if ( !@set ) {
         my $note = join(', ',
            map { "--$self->{long_for}->{$_}" }
                @{$required}[ 0 .. scalar(@$required) - 2] );
         $note .= " or --$self->{long_for}->{$required->[-1]}";
         $self->error("Specify at least one of $note");
      }
   }

   foreach my $spec ( grep { $_->{y} && defined $vals{$_->{k}} } @specs ) {
      my $val = $vals{$spec->{k}};
      if ( $spec->{y} eq 'm' ) {
         my ( $num, $suffix ) = $val =~ m/(\d+)([a-z])?$/;
         if ( !$suffix ) {
            my ( $s ) = $spec->{d} =~ m/\(suffix (.)\)/;
            $suffix = $s || 's';
            $ENV{MKDEBUG} && _d("No suffix given; using $suffix for $spec->{k} "
               . "(value: '$val')");
         }
         if ( $suffix =~ m/[smhd]/ ) {
            $val = $suffix eq 's' ? $num            # Seconds
                 : $suffix eq 'm' ? $num * 60       # Minutes
                 : $suffix eq 'h' ? $num * 3600     # Hours
                 :                  $num * 86400;   # Days
            $vals{$spec->{k}} = $val;
            $ENV{MKDEBUG} && _d("Setting option $spec->{k} to $val");
         }
         else {
            $self->error("Invalid --$spec->{l} argument");
         }
      }
      elsif ( $spec->{y} eq 'd' ) {
         $ENV{MKDEBUG} && _d("Parsing option $spec->{y} as a DSN");
         my $from_key = $self->{copyfrom}->{$spec->{k}};
         my $default = {};
         if ( $from_key ) {
            $ENV{MKDEBUG} && _d("Option $spec->{y} DSN copies from option $from_key");
            $default = $self->{dsn}->parse($self->{dsn}->as_string($vals{$from_key}));
         }
         $vals{$spec->{k}} = $self->{dsn}->parse($val, $default);
      }
      elsif ( $spec->{y} eq 'z' ) {
         my ($pre, $num, $factor) = $val =~ m/^([+-])?(\d+)([kMG])?$/;
         if ( defined $num ) {
            if ( $factor ) {
               $num *= $factor_for{$factor};
               $ENV{MKDEBUG} && _d("Setting option $spec->{y} to num * factor");
            }
            $vals{$spec->{k}} = ($pre || '') . $num;
         }
         else {
            $self->error("Invalid --$spec->{l} argument");
         }
      }
   }

   foreach my $spec ( grep { $_->{y} } @specs ) {
      $ENV{MKDEBUG} && _d("Treating option $spec->{k} as a list");
      my $val = $vals{$spec->{k}};
      if ( $spec->{y} eq 'H' || (defined $val && $spec->{y} eq 'h') ) {
         $vals{$spec->{k}} = { map { $_ => 1 } split(',', ($val || '')) };
      }
      elsif ( $spec->{y} eq 'A' || (defined $val && $spec->{y} eq 'a') ) {
         $vals{$spec->{k}} = [ split(',', ($val || '')) ];
      }
   }

   return %vals;
}

sub error {
   my ( $self, $note ) = @_;
   $self->{__error__} = 1;
   push @{$self->{notes}}, $note;
}

sub prog {
   (my $prog) = $PROGRAM_NAME =~ m/([.A-Za-z-]+)$/;
   return $prog || $PROGRAM_NAME;
}

sub prompt {
   my ( $self ) = @_;
   my $prog   = $self->prog;
   my $prompt = $self->{prompt} || '<options>';
   return "Usage: $prog $prompt\n";
}

sub descr {
   my ( $self ) = @_;
   my $prog = $self->prog;
   my $descr  = $prog . ' ' . ($self->{descr} || '')
          . "  For more details, please use the --help option, "
          . "or try 'perldoc $prog' for complete documentation.";
   $descr = join("\n", $descr =~ m/(.{0,80})(?:\s+|$)/g);
   $descr =~ s/ +$//mg;
   return $descr;
}

sub usage_or_errors {
   my ( $self, %opts ) = @_;
   if ( $opts{help} ) {
      print $self->usage(%opts);
      exit(0);
   }
   elsif ( $self->{__error__} ) {
      print $self->errors();
      exit(0);
   }
}

sub errors {
   my ( $self ) = @_;
   my $usage = $self->prompt() . "\n";
   if ( (my @notes = @{$self->{notes}}) ) {
      $usage .= join("\n  * ", 'Errors in command-line arguments:', @notes) . "\n";
   }
   return $usage . "\n" . $self->descr();
}

sub usage {
   my ( $self, %vals ) = @_;
   my @specs = @{$self->{specs}};

   my $maxl = max(map { length($_->{l}) + ($_->{n} ? 4 : 0)} @specs);

   my $maxs = max(0,
      map { length($_->{l}) + ($_->{n} ? 4 : 0)}
      grep { $_->{t} } @specs);

   my $lcol = max($maxl, ($maxs + 3));
   my $rcol = 80 - $lcol - 6;
   my $rpad = ' ' x ( 80 - $rcol );

   $maxs = max($lcol - 3, $maxs);

   my $usage = $self->descr() . "\n" . $self->prompt();
   foreach my $g ( @{$self->{groups}} ) {
      $usage .= "\n$g->{d}:\n";
      foreach my $spec (
         sort { $a->{l} cmp $b->{l} } grep { $_->{g} eq $g->{k} } @specs )
      {
         my $long  = $spec->{n} ? "[no]$spec->{l}" : $spec->{l};
         my $short = $spec->{t};
         my $desc  = $spec->{d};
         if ( $spec->{y} && $spec->{y} eq 'm' ) {
            my ($s) = $desc =~ m/\(suffix (.)\)/;
            $s    ||= 's';
            $desc =~ s/\s+\(suffix .\)//;
            $desc .= ".  Optional suffix s=seconds, m=minutes, h=hours, "
                   . "d=days; if no suffix, $s is used.";
         }
         $desc = join("\n$rpad", grep { $_ } $desc =~ m/(.{0,$rcol})(?:\s+|$)/g);
         $desc =~ s/ +$//mg;
         if ( $short ) {
            $usage .= sprintf("  --%-${maxs}s -%s  %s\n", $long, $short, $desc);
         }
         else {
            $usage .= sprintf("  --%-${lcol}s  %s\n", $long, $desc);
         }
      }
   }

   if ( (my @instr = @{$self->{instr}}) ) {
      $usage .= join("\n", map { "  $_" } @instr) . "\n";
   }
   if ( $self->{dsn} ) {
      $usage .= "\n" . $self->{dsn}->usage();
   }
   $usage .= "\nOptions and values after processing arguments:\n";
   foreach my $spec ( sort { $a->{l} cmp $b->{l} } @specs ) {
      my $val   = $vals{$spec->{k}};
      my $type  = $spec->{y} || '';
      my $bool  = $spec->{s} =~ m/^[\w-]+(?:\|[\w-])?!?$/;
      $val      = $bool                     ? ( $val ? 'TRUE' : 'FALSE' )
                : !defined $val             ? '(No value)'
                : $type eq 'd'              ? $self->{dsn}->as_string($val)
                : $type =~ m/H|h/           ? join(',', sort keys %$val)
                : $type =~ m/A|a/           ? join(',', @$val)
                :                             $val;
      $usage .= sprintf("  --%-${lcol}s  %s\n", $spec->{l}, $val);
   }
   return $usage;
}

sub prompt_noecho {
   shift @_ if ref $_[0] eq __PACKAGE__;
   my ( $prompt ) = @_;
   local $OUTPUT_AUTOFLUSH = 1;
   print $prompt;
   my $response;
   eval {
      require Term::ReadKey;
      Term::ReadKey::ReadMode('noecho');
      chomp($response = <STDIN>);
      Term::ReadKey::ReadMode('normal');
      print "\n";
   };
   if ( $EVAL_ERROR ) {
      die "Cannot read response; is Term::ReadKey installed? $EVAL_ERROR";
   }
   return $response;
}

sub groups {
   my ( $self, @groups ) = @_;
   push @{$self->{groups}}, @groups;
}

sub _d {
   my ( $line ) = (caller(0))[2];
   print "# OptionParser:$line $PID ", @_, "\n";
}

if ( $ENV{MKDEBUG} ) {
   print '# ', $^X, ' ', $], "\n";
   my $uname = `uname -a`;
   if ( $uname ) {
      $uname =~ s/\s+/ /g;
      print "# $uname\n";
   }
   printf("# %s  Ver %s Distrib %s Changeset %s line %d\n",
      $PROGRAM_NAME, ($main::VERSION || ''), ($main::DISTRIB || ''),
      ($main::SVN_REV || ''), __LINE__);
}

1;

# ###########################################################################
# End OptionParser package
# ###########################################################################

# ###########################################################################
# Quoter package 1755
# ###########################################################################
use strict;
use warnings FATAL => 'all';

package Quoter;

use English qw(-no_match_vars);

sub new {
   my ( $class ) = @_;
   bless {}, $class;
}

sub quote {
   my ( $self, @vals ) = @_;
   foreach my $val ( @vals ) {
      $val =~ s/`/``/g;
   }
   return join('.', map { '`' . $_ . '`' } @vals);
}

sub quote_val {
   my ( $self, @vals ) = @_;
   return join(', ',
      map {
         if ( defined $_ ) {
            $_ =~ s/(['\\])/\\$1/g;
            $_ eq '' || $_ =~ m/^0|\D/ ? "'$_'" : $_;
         }
         else {
            'NULL';
         }
      } @vals
   );
}

1;

# ###########################################################################
# End Quoter package
# ###########################################################################

# ###########################################################################
# DSNParser package 1868
# ###########################################################################
use strict;
use warnings FATAL => 'all';

package DSNParser;

use DBI;
use Data::Dumper;
$Data::Dumper::Indent    = 0;
$Data::Dumper::Quotekeys = 0;
use English qw(-no_match_vars);

sub new {
   my ( $class, @opts ) = @_;
   my $self = {
      opts => {
         A => {
            desc => 'Default character set',
            dsn  => 'charset',
            copy => 1,
         },
         D => {
            desc => 'Database to use',
            dsn  => 'database',
            copy => 1,
         },
         F => {
            desc => 'Only read default options from the given file',
            dsn  => 'mysql_read_default_file',
            copy => 1,
         },
         h => {
            desc => 'Connect to host',
            dsn  => 'host',
            copy => 1,
         },
         p => {
            desc => 'Password to use when connecting',
            dsn  => 'password',
            copy => 1,
         },
         P => {
            desc => 'Port number to use for connection',
            dsn  => 'port',
            copy => 1,
         },
         S => {
            desc => 'Socket file to use for connection',
            dsn  => 'mysql_socket',
            copy => 1,
         },
         u => {
            desc => 'User for login if not current user',
            dsn  => 'user',
            copy => 1,
         },
      },
   };
   foreach my $opt ( @opts ) {
      $ENV{MKDEBUG} && _d('Adding extra property ' . $opt->{key});
      $self->{opts}->{$opt->{key}} = { desc => $opt->{desc}, copy => $opt->{copy} };
   }
   return bless $self, $class;
}

sub prop {
   my ( $self, $prop, $value ) = @_;
   if ( @_ > 2 ) {
      $ENV{MKDEBUG} && _d("Setting $prop property");
      $self->{$prop} = $value;
   }
   return $self->{$prop};
}

sub parse {
   my ( $self, $dsn, $prev, $defaults ) = @_;
   if ( !$dsn ) {
      $ENV{MKDEBUG} && _d('No DSN to parse');
      return;
   }
   $ENV{MKDEBUG} && _d("Parsing $dsn");
   $prev     ||= {};
   $defaults ||= {};
   my %vals;
   my %opts = %{$self->{opts}};
   if ( $dsn !~ m/=/ && (my $p = $self->prop('autokey')) ) {
      $ENV{MKDEBUG} && _d("Interpreting $dsn as $p=$dsn");
      $dsn = "$p=$dsn";
   }
   my %hash = map { m/^(.)=(.*)$/g } split(/,/, $dsn);
   foreach my $key ( keys %opts ) {
      $ENV{MKDEBUG} && _d("Finding value for $key");
      $vals{$key} = $hash{$key};
      if ( !defined $vals{$key} && defined $prev->{$key} && $opts{$key}->{copy} ) {
         $vals{$key} = $prev->{$key};
         $ENV{MKDEBUG} && _d("Copying value for $key from previous DSN");
      }
      if ( !defined $vals{$key} ) {
         $vals{$key} = $defaults->{$key};
         $ENV{MKDEBUG} && _d("Copying value for $key from defaults");
      }
   }
   foreach my $key ( keys %hash ) {
      die "Unrecognized DSN part '$key' in '$dsn'\n"
         unless exists $opts{$key};
   }
   if ( (my $required = $self->prop('required')) ) {
      foreach my $key ( keys %$required ) {
         die "Missing DSN part '$key' in '$dsn'\n" unless $vals{$key};
      }
   }
   return \%vals;
}

sub as_string {
   my ( $self, $dsn ) = @_;
   return $dsn unless ref $dsn;
   return join(',',
      map  { "$_=" . ($_ eq 'p' ? '...' : $dsn->{$_}) }
      grep { defined $dsn->{$_} && $self->{opts}->{$_} }
      sort keys %$dsn );
}

sub usage {
   my ( $self ) = @_;
   my $usage
      = "DSN syntax is key=value[,key=value...]  Allowable DSN keys:\n"
      . "  KEY  COPY  MEANING\n"
      . "  ===  ====  =============================================\n";
   my %opts = %{$self->{opts}};
   foreach my $key ( sort keys %opts ) {
      $usage .= "  $key    "
             .  ($opts{$key}->{copy} ? 'yes   ' : 'no    ')
             .  ($opts{$key}->{desc} || '[No description]')
             . "\n";
   }
   if ( (my $key = $self->prop('autokey')) ) {
      $usage .= "  If the DSN is a bareword, the word is treated as the '$key' key.\n";
   }
   return $usage;
}

sub get_cxn_params {
   my ( $self, $info ) = @_;
   my $dsn;
   my %opts = %{$self->{opts}};
   my $driver = $self->prop('dbidriver') || '';
   if ( $driver eq 'Pg' ) {
      $dsn = 'DBI:Pg:dbname=' . ( $info->{D} || '' ) . ';'
         . join(';', map  { "$opts{$_}->{dsn}=$info->{$_}" }
                     grep { defined $info->{$_} }
                     qw(h P));
   }
   else {
      $dsn = 'DBI:mysql:' . ( $info->{D} || '' ) . ';'
         . join(';', map  { "$opts{$_}->{dsn}=$info->{$_}" }
                     grep { defined $info->{$_} }
                     qw(F h P S A))
         . ';mysql_read_default_group=mysql';
   }
   $ENV{MKDEBUG} && _d($dsn);
   return ($dsn, $info->{u}, $info->{p});
}

sub get_dbh {
   my ( $self, $cxn_string, $user, $pass, $opts ) = @_;
   $opts ||= {};
   my $defaults = {
      AutoCommit        => 0,
      RaiseError        => 1,
      PrintError        => 0,
      mysql_enable_utf8 => ($cxn_string =~ m/charset=utf8/ ? 1 : 0),
   };
   @{$defaults}{ keys %$opts } = values %$opts;
   $ENV{MKDEBUG} && _d($cxn_string, ' ', $user, ' ', $pass, ' {',
      join(', ', map { "$_=>$defaults->{$_}" } keys %$defaults ), '}');
   my $dbh = DBI->connect($cxn_string, $user, $pass, $defaults);
   if ( my ($charset) = $cxn_string =~ m/charset=(\w+)/ ) {
      my $sql = "/*!40101 SET NAMES $charset*/";
      $ENV{MKDEBUG} && _d("$dbh: $sql");
      $dbh->do($sql);
      $ENV{MKDEBUG} && _d('Enabling charset for STDOUT');
      if ( $charset eq 'utf8' ) {
         binmode(STDOUT, ':utf8')
            or die "Can't binmode(STDOUT, ':utf8'): $OS_ERROR";
      }
      else {
         binmode(STDOUT) or die "Can't binmode(STDOUT): $OS_ERROR";
      }
   }
   my $setvars = $self->prop('setvars');
   if ( $setvars ) {
      my $sql = "SET $setvars";
      $ENV{MKDEBUG} && _d("$dbh: $sql");
      $dbh->do($sql);
   }
   $ENV{MKDEBUG} && _d('DBH info: ',
      $dbh,
      Dumper($dbh->selectrow_hashref(
         'SELECT DATABASE(), CONNECTION_ID(), VERSION()/*!50038 , @@hostname*/')),
      ' Connection info: ', ($dbh->{mysql_hostinfo} || 'undef'),
      ' Character set info: ',
      Dumper($dbh->selectall_arrayref(
         'SHOW VARIABLES LIKE "character_set%"', { Slice => {}})),
      ' $DBD::mysql::VERSION: ', $DBD::mysql::VERSION,
      ' $DBI::VERSION: ', $DBI::VERSION,
   );
   return $dbh;
}

sub get_hostname {
   my ( $self, $dbh ) = @_;
   if ( my ($host) = ($dbh->{mysql_hostinfo} || '') =~ m/^(\w+) via/ ) {
      return $host;
   }
   my ( $hostname, $one ) = $dbh->selectrow_array(
      'SELECT /*!50038 @@hostname, */ 1');
   return $hostname;
}

sub disconnect {
   my ( $self, $dbh ) = @_;
   $ENV{MKDEBUG} && $self->print_active_handles($dbh);
   $dbh->disconnect;
}

sub print_active_handles {
   my ( $self, $thing, $level ) = @_;
   $level ||= 0;
   printf("# Active %sh: %s %s %s\n", $thing->{Type}, "\t" x $level,
      $thing, ($thing->{Type} eq 'st' ? $thing->{Statement} || '' : ''));
   foreach my $handle ( grep {defined} @{ $thing->{ChildHandles} } ) {
      $self->print_active_handles->( $handle, $level + 1 );
   }
}

sub _d {
   my ( $line ) = (caller(0))[2];
   @_ = map { defined $_ ? $_ : 'undef' } @_;
   print "# DSNParser:$line $PID ", @_, "\n";
}

1;

# ###########################################################################
# End DSNParser package
# ###########################################################################

package main;

use English qw(-no_match_vars);
use File::Basename qw(dirname);
use File::Find;
use File::Spec;
use List::Util qw(max sum);
use POSIX;
use Time::HiRes qw(time);

my @conn_params;
my $dp = new DSNParser;

# ############################################################################
# Get configuration information.
# ############################################################################
my %opts = (
   basedir  => File::Spec->curdir(),
);

eval {
   # Try to read --numthread from the number of CPUs in /proc/cpuinfo.  This
   # only works on GNU/Linux.
   open my $file, "<", "/proc/cpuinfo"
      or die $OS_ERROR;
   local $INPUT_RECORD_SEPARATOR = undef;
   my $contents = <$file>;
   close $file;
   $opts{m} = scalar( map { $_ } $contents =~ m/(processor)/g );
};
$opts{m} ||= $ENV{NUMBER_OF_PROCESSORS}; # MSWin32
$opts{m} = max(2, $opts{m} || 0);

my @opt_spec = (
   { s => 'askpass',           d => 'Prompt for password for connections' },
   { s => 'basedir=s',         d => 'Base directory for creating files' },
   { s => 'bulkinsbufsize=i',  d => 'Set bulk_insert_buffer_size before LOAD DATA INFILE' },
   { s => 'charset|A=s',       d => 'Set the character set; default BINARY' },
   { s => 'commit',            d => 'Commit after each LOAD DATA INFILE' },
   { s => 'createdb',          d => 'Create databases that do not exist' },
   { s => 'csv',               d => 'Files are in in CSV format (implies --tab)' },
   { s => 'database|D=s',      d => 'Specify the database for all tables' },
   { s => 'databases|d=h',     d => 'Restore only this comma-separated list of databases' },
   { s => 'dbregex=s',         d => 'Restore only databases whose names match this pattern' },
   { s => 'defaults-file|F=s', d => 'Only read mysql options from the given file' },
   { s => 'disablekeys!',      d => 'Set DISABLE KEYS before loading files' },
   { s => 'fifo!',             d => 'Stream files into a FIFO for --tab; default' },
   { s => 'host|h=s',          d => 'Connect to host' },
   { s => 'ignoredb|g=H',      d => 'Ignore this comma-separated list of databases' },
   { s => 'ignore|i',          d => 'Use the IGNORE option to LOAD DATA INFILE' },
   { s => 'ignoretbl|n=H',     d => 'Ignore this comma-separated list of tables' },
   { s => 'local|L',           d => 'Use the LOCAL option to LOAD DATA INFILE' },
   { s => 'locktables!',       d => 'Lock tables before LOAD DATA INFILE' },
   { s => 'noautovalon0!',     d => 'Set NO_AUTO_VALUE_ON_ZERO before LOAD DATA INFILE' },
   { s => 'nobinlog!',         d => 'Set SQL_LOG_BIN=0 before LOAD DATA INFILE' },
   { s => 'noforeignkeys!',    d => 'Set FOREIGN_KEY_CHECKS=0 before LOAD DATA INFILE' },
   { s => 'nouniquechecks!',   d => 'Set UNIQUE_CHECKS=0 before LOAD DATA INFILE' },
   { s => 'numthread|m=i',     d => "Number of threads; default $opts{m}" },
   { s => 'password|p=s',      d => 'Password to use when connecting' },
   { s => 'port|P=i',          d => 'Port number to use for connection' },
   { s => 'quiet|q',           d => 'Sets --verbose to 0' },
   { s => 'replace|r',         d => 'Use the REPLACE option to LOAD DATA INFILE' },
   { s => 'setvars=s',         d => 'Set these MySQL variables (default wait_timeout=10000)' },
   { s => 'socket|S=s',        d => 'Socket file to use for connection' },
   { s => 'tables|t=h',        d => 'Restore only this comma-separated list of tables' },
   { s => 'tab|T',             d => 'Restore tab-separated files with LOAD DATA INFILE' },
   { s => 'tblregex=s',        d => 'Restore only tables whose names match this pattern' },
   { s => 'test',     ,        d => 'Print commands instead of executing them' },
   { s => 'truncate',          d => 'TRUNCATE TABLE before LOAD DATA INFILE' },
   { s => 'umask=s',           d => 'Set umask to this value, in octal' },
   { s => 'user|u=s',          d => 'User for login if not current user' },
   { s => 'verbose|v+',        d => 'Verbosity; can specify multiple times; default 1' },
   { s => 'wait|w=m',          d => 'Wait limit when server is down (default 5m)' },
);

my $q          = new Quoter();
my $opt_parser = new OptionParser(@opt_spec);
$opt_parser->{strict} = 0;
$opt_parser->{prompt} = '<options> PATH [PATH...]';
$opt_parser->{descr} = 'loads files into MySQL in parallel.';
%opts = $opt_parser->parse(%opts);
$dp->prop('setvars', $opts{setvars});

# ############################################################################
# Process options.
# ############################################################################
$opts{basedir} = File::Spec->rel2abs($opts{basedir});

if ( $opts{q} ) {
   # TODO: 'sets --verbose 0'
   $opts{v} = 0;
}

if ( $opts{csv} ) {
   # TODO: 'implies --tab'
   $opts{T} = 1;
}

if ( $opts{T} ) { # TODO 'implies
   $opts{disablekeys}    = 1 unless defined $opts{disablekeys};
   $opts{noautovalon0}   = 1 unless defined $opts{noautovalon0};
   $opts{nobinlog}       = 1 unless defined $opts{nobinlog};
   $opts{nouniquechecks} = 1 unless defined $opts{nouniquechecks};
   $opts{noforeignkeys}  = 1 unless defined $opts{noforeignkeys};
}

if ( !@ARGV ) {
   $opt_parser->error("You did not specify any files to restore");
}

foreach my $opt ( qw(locktables truncate disablekeys noautovalon0
                     nouniquechecks noforeignkeys nobinlog
                     bulkinsbufsize commit L i r) ) {
   if ( defined $opts{$opt} && !$opts{T} ) {
      $opt_parser->error('Option ' . (length($opt) > 1 ? '--' : '-')
         . "$opt is ineffective without --tab or --csv");
   }
}

if ( $opts{fifo} ) {
   if ( !defined $opts{umask} ) {
      $opts{umask} = 0;
   }
}

if ( defined $opts{umask} ) {
   umask oct($opts{umask});
}

$opt_parser->usage_or_errors(%opts);

# ############################################################################
# Gather connection parameters to pass to mysql.  Order matters; mysql
# will have a problem if --defaults-file isn't first.
# ############################################################################
if ( !defined $opts{p} && $opts{askpass} ) {
   $opts{p} = OptionParser::prompt_noecho("Enter password: ");
}
@conn_params = (
   [qw(--defaults-file F)],
   [qw(--host          h)],
   [qw(--password      p)],
   [qw(--port          P)],
   [qw(--socket        S)],
   [qw(--user          u)],
);
@conn_params = map { "$_->[0]='$opts{$_->[1]}'" } grep { defined $opts{$_->[1]} } @conn_params;

# ############################################################################
# Connect.
# ############################################################################
my $dbh = get_cxn();
$dbh->{InactiveDestroy}  = 1;         # Don't die on fork().
$dbh->{FetchHashKeyName} = 'NAME_lc'; # Lowercases all column names for fetchrow_hashref()

# ############################################################################
# Discover files to be restored.
# ############################################################################
my @tables_to_do;
my @view_files;
my %files_for_table;
my %stats;
my $known_filetypes = 'sql|txt|csv|trg';

# Find directories and files and save them.
File::Find::find(
   {  no_chdir => 1,
      wanted   => sub {
         my ( $dir, $filename ) = ($File::Find::dir, $File::Find::name);
         if ( -f $filename && $filename !~ m/00_(?:master|views)/ ) {
            my ($vol, $dirs, $file) = File::Spec->splitpath( $filename );
            if ( $file =~ m/\.(?:$known_filetypes)(?:\.\d+)?(?:\.gz)?$/ ) {
               my @dirs  = grep { $_ } File::Spec->splitdir($dir);
               my $db    = $opts{D} || $dirs[-1];
               my ($tbl) = $file =~ m/^([^.]+)/;

               if ( ( !$opts{d} || exists($opts{d}->{$db}) )
                  && ( !$opts{dbregex} || $db =~ m/$opts{dbregex}/ )
                  && ( !exists $opts{g}->{$db} )
                  && ( !exists $opts{n}->{$tbl} )
                  && ( !exists $opts{n}->{"$db.$tbl"} )
                  && ( !$opts{t} || exists($opts{t}->{$tbl}) )
                  && ( !$opts{tblregex} || $tbl =~ m/$opts{tblregex}/ )
               ) {
                  if ( filetype($file) ne 'sql' && !$opts{T} ) {
                     die "$filename isn't a SQL file and you didn't tell me "
                        . "to load tab-delimited files.  Maybe you should "
                        . "specify the --tab option.\n";
                  }
                  $stats{files}++;
                  push @{$files_for_table{$db}->{$tbl}}, $filename;
                  push @tables_to_do, {
                     D => $db,
                     N => $tbl,
                  };
               }
            }
         }
         elsif ( $filename =~ m/00_views.sql/ ) {
            $stats{files}++;
            push @view_files, $filename;
         }
         elsif ( ! -d $filename && $filename !~ m/00_master_data.sql/ ) {
            info(1, "Skipping file $filename");
         }
      },
   },
   map { File::Spec->rel2abs($_) } @ARGV
);

# ############################################################################
# Canonicalize table list in the order they were discovered, filtering out
# tables that should not be done.
# ############################################################################
{
   my %seen;
   @tables_to_do = grep { !$seen{$_->{D}}->{$_->{N}}++ } @tables_to_do;
   $stats{tables} = scalar(@tables_to_do);

   if ( $opts{createdb} ) {
      my %dbs;
      map { $dbs{ $_->{D} }++ } @tables_to_do;
      foreach my $db ( keys %dbs ) {
         $dbh->do("CREATE DATABASE IF NOT EXISTS " . $q->quote($db));
      }
   }

}

# #########################################################################
# Design the format for printing out.
# #########################################################################
my ( $maxdb, $maxtbl);
$maxdb  = max(8, map { length($_->{D}) } @tables_to_do);
$maxtbl = max(5, map { length($_->{N}) } @tables_to_do);
my $format = "%-${maxdb}s %-${maxtbl}s %5s %5s %6s %7s";
info(2, sprintf($format, qw(DATABASE TABLE FILES TIME STATUS THREADS)));

# This signal handler will do nothing but wake up the sleeping parent process
# and record the exit status and time of the child that exited (as a side
# effect of not discarding the signal).  Due to Solaris's signal handling and
# File::Find's use of forking, this must go after File::Find.  See
# bug #1887102.
my %exited_children;
$SIG{CHLD} = sub {
   my $kid;
   while (($kid = waitpid(-1, POSIX::WNOHANG)) > 0) {
      # Must right-shift to get the actual exit status of the child.
      $exited_children{$kid}->{exit_status} = $CHILD_ERROR >> 8;
      $exited_children{$kid}->{exit_time}   = time();
   }
};

# #########################################################################
# Assign the work to child processes.  Initially just start --numthreads
# number of children.  Each child that exits will trigger a new one to start
# after that.
# #########################################################################
my $start = time();
my %kids;
while ( @tables_to_do || %kids ) {

   # Wait for the MySQL server to become responsive.
   my $tries = 0;
   while ( !$dbh->ping && $tries++ < $opts{w} ) {
      sleep(1);
      eval {
         $dbh = get_cxn();
      };
      if ( $EVAL_ERROR ) {
         info(0, 'Waiting: ' . scalar(localtime) . ' ' . mysql_error_msg($EVAL_ERROR));
      }
   }
   if ( $tries >= $opts{w} ) {
      die "Too many retries, exiting.\n";
   }

   # Start a new child process.
   while ( @tables_to_do && $opts{m} > keys %kids ) {
      my $todo = shift @tables_to_do;
      $todo->{time} = time;
      my $pid = fork();
      die "Can't fork: $OS_ERROR" unless defined $pid;
      if ( $pid ) {              # I'm the parent
         $kids{$pid} = $todo;
      }
      else {                     # I'm the child
         $SIG{CHLD} = 'DEFAULT'; # See bug #1886444
         my $exit_status = 0;
         $exit_status = do_table(
            @{$todo}{qw(D N)},
            @{$files_for_table{$todo->{D}}->{$todo->{N}}}
         ) || $exit_status;
         exit($exit_status);
      }
   }

   # Possibly wait for child.
   my $reaped = 0;
   foreach my $kid ( keys %exited_children ) {
      my $status = $exited_children{$kid};
      my $todo   = $kids{$kid};
      my $stat   = $status->{exit_status};
      my $time   = $status->{exit_time} - $todo->{time};
      info(2, sprintf($format, @{$todo}{qw(D N)},
         scalar(@{$files_for_table{$todo->{D}}->{$todo->{N}}}),
         sprintf('%.2f', $time), $stat, scalar(keys %kids)));
      $stats{ $stat ? 'failure' : 'success' }++;
      $stats{time} += $time;
      delete $kids{$kid};
      delete $exited_children{$kid};
      $reaped = 1;
   }

   if ( !$reaped ) {
      # Don't busy-wait.  But don't wait forever either, as a child may exit
      # and signal while we're not sleeping, so if we sleep forever we may
      # not get the signal.
      sleep(1);
   }
}

# Load views.
foreach my $file ( @view_files ) {
   my @args;
   if ( $file =~ m/\.gz/ ) {
      @args = (qw(gunzip --stdout), qq{'$file'}, qw(| mysql), @conn_params);
   }
   else {
      @args = (qw(mysql), @conn_params, '<', qq{'$file'});
   }
   my $exit_status = system_call( @args );
   $stats{ $exit_status ? 'failure' : 'success' }++;
}

$stats{wallclock} = time() - $start;

info(1, sprintf(
   '%5d tables, %5d files, %5d successes, %2d failures, '
   . '%6.2f wall-clock time, %6.2f load time',
      map {
         $stats{$_} || 0
      } qw(tables files success failure wallclock time)
   ));

# Exit status is 1 if there were any failures.
exit( $stats{failure} ? 1 : 0 );

# ############################################################################
# Subroutines
# ############################################################################

sub makefifo {
   my $filename = File::Spec->catfile($opts{basedir}, "mpr_fifo_$PID");
   if ( !-p $filename ) {
      if ( -e $filename ) {
         die "Cannot make fifo: $filename exists";
      }
      if ( $opts{test} ) {
         print "mkfifo $filename\n";
      }
      else {
         POSIX::mkfifo($filename, 0777) or die "Cannot make fifo $filename: $OS_ERROR";
      }
   }
   return $filename;
}

sub mysql_error_msg {
   my ( $text ) = @_;
   $text =~ s/^.*?failed: (.*?) at \S+ line (\d+).*$/$1 at line $2/s;
   return $text;
}

# Prints a message.
sub info {
   my ( $level, $msg ) = @_;
   if ( $level <= $opts{v} ) {
      print $msg, "\n";
   }
}

# Actually restores a table.
sub do_table {
   my ( $db, $tbl, @files ) = @_;
   my $exit_status = 0;

   # Sort files.  If it's a --tab, this will result in the following load
   # order:
   # * sql     (drop and create table)
   # * txt/csv (load data into table)
   # * trg     (create triggers)
   # Later we'll do the views from the 00_views file, after all tables are
   # recreated.
   @files = sort {
      my $a_type = filetype($a);
      my $b_type = filetype($b);
      (index($known_filetypes, $a_type) <=> index($known_filetypes, $b_type))
         || ($a cmp $b);
   } @files;

   my $dbh;

   my ($fifo, $load_from, $loaded);

   foreach my $file ( @files ) {

      if ( filetype($file) =~ m/^(?:sql|trg)$/ ) {
         my @args;
         if ( $file =~ m/\.gz/ ) {
            @args = (qw(gunzip --stdout), qq{'$file'}, qw(| mysql),
                     @conn_params, $db);
         }
         else {
            @args = (qw(mysql), @conn_params, $db, '<', qq{'$file'});
         }
         $exit_status = system_call( @args ) || $exit_status;
      }
      else {

         if ( $file =~ m/\.gz$/ ) {
            if ( $opts{fifo} ) {
               $fifo ||= makefifo();
               $exit_status
                  = system_call(qq{gunzip --stdout '$file' > '$fifo' &}) || $exit_status;
               $load_from = $fifo;
            }
            else {
               $exit_status = system_call(qq{gunzip '$file'}) || $exit_status;
               ( $load_from = $file ) =~ s/\.gz$//;
            }
         }
         else {
            $load_from = $file;
         }

         my $sql;
         my $LOCAL = $opts{L} ? ' LOCAL' : '';
         my $OPT   = $opts{i} ? 'IGNORE' : $opts{r} ? 'REPLACE' : '';
         if ( $opts{csv} ) {
            $sql  = qq{LOAD DATA$LOCAL INFILE ? }
                  . qq{$OPT INTO TABLE `$db`.`$tbl` }
                  . qq{FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\\"' }
                  . qq{LINES TERMINATED BY '\\n' }
                  . qq{/*!50038 CHARACTER SET $opts{A} */};
         }
         elsif ( $opts{T} ) {
            $sql  = qq{LOAD DATA$LOCAL INFILE ? }
                  . qq{$OPT INTO TABLE `$db`.`$tbl` }
                  . qq{/*!50038 CHARACTER SET $opts{A} */};
         }

         if ( $sql ) {
            if ( $opts{test} ) {
               print $sql, "\n";
            }
            else {

               # First loop through.
               if ( !$loaded++ ) {
                  $dbh ||= get_cxn();
                  if ( $opts{locktables} ) {
                     $dbh->do("LOCK TABLES `$db`.`$tbl` WRITE");
                  }
                  if ( $opts{truncate} ) {
                     $dbh->do("TRUNCATE TABLE `$db`.`$tbl`");
                  }
               }

               # Every loop through, set options.
               $dbh ||= get_cxn();
               $dbh->do("USE `$db`"); # For binary logging.
               if ( $opts{disablekeys} ) {
                  $dbh->do("/*!40000 ALTER TABLE `$db`.`$tbl` DISABLE KEYS */");
               }
               if ( $opts{noautovalon0} ) {
                  $dbh->do('/*!40101 SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO" */');
               }
               if ( $opts{nouniquechecks} ) {
                  $dbh->do('SET UNIQUE_CHECKS=0');
               }
               if ( $opts{noforeignkeys} ) {
                  $dbh->do('SET FOREIGN_KEY_CHECKS=0');
               }
               if ( $opts{nobinlog} ) {
                  $dbh->do('SET SQL_LOG_BIN=0');
               }
               if ( $opts{bulkinsbufsize} ) {
                  $dbh->do("SET SESSION bulk_insert_buffer_size=$opts{bulkinsbufsize}");
               }

               eval {
                  $dbh->do($sql, {}, $load_from);
                  $dbh->commit if $opts{commit};
               };
               if ( $EVAL_ERROR ) {
                  die mysql_error_msg($EVAL_ERROR) . " while restoring $db.$tbl";
               }
            }
         }
         else {
            unlink $fifo if $fifo;
            die "I don't understand how to load file $file\n";
         }
      }
   }

   if ( $dbh && $opts{T} ) {
      if ( $opts{disablekeys} ) {
         $dbh->do("/*!40000 ALTER TABLE `$db`.`$tbl` ENABLE KEYS */");
      }
      if ( $opts{locktables} ) {
         $dbh->do("LOCK TABLES `$db`.`$tbl` WRITE");
      }
   }

   if ( !$opts{test} && $fifo ) {
      unlink $fifo;
   }

   $dbh->disconnect() if $dbh;
   return $exit_status;
}

sub filetype {
   my ( $filename ) = @_;
   my ( $type ) = $filename =~ m/\.(sql|txt|csv|trg)(?:\.\d+)?(?:\.gz)?$/;
   return $type || '';
}

sub get_cxn {
   my %params = %opts;
   delete $params{D}; # Because it has a special meaning; see documentation.
   my $dbh = $dp->get_dbh($dp->get_cxn_params(\%params));
   if ( $opts{A} ) {
      $dbh->do("/*!40101 SET character_set_database=$opts{A} */");
   }
   return $dbh;
}

sub system_call {
   my ( @cmd ) = @_;
   my $exit_status = 0;
   if ( $opts{test} ) {
      print join(' ', @cmd), "\n";
   }
   else {
      $exit_status = system(join(' ', @cmd));
      # Must right-shift to get the actual exit status of the command.
      # Otherwise the upstream exit() call that's about to happen will get a
      # larger value than it likes, and will just report zero to waitpid().
      $exit_status = $exit_status >> 8;
   }
   return $exit_status;
}

# ############################################################################
# Documentation.
# ############################################################################

=pod

=head1 NAME

mk-parallel-restore - Load files into MySQL in parallel.

=head1 SYNOPSIS

  mk-parallel-restore /path/to/files
  mk-parallel-restore --tab /path/to/files

=head1 DESCRIPTION

mk-parallel-restore is a way to load SQL or delimited-file dumps into MySQL
in parallel at high speed.  It is especially designed for restoring files
dumped by L<mk-parallel-dump>.  It automatically
detects whether a file contains SQL or delimited data from the filename
extension, and either shells out to C<mysql> or executes C<LOAD DATA INFILE>
with the file.  On UNIX-like systems, it will even make a FIFO to decompress
gzipped files for C<LOAD DATA INFILE>.

By default it discovers all files in the directory you specify on the command
line.  It uses the file's parent directory as the database name and the file's
name (up to the first dot) as the table name.  It can deal with files named
like the following:

  dir/tbl.sql
  dir/tbl.txt
  dir/tbl.csv
  dir/tbl.trg

It is also happy with files that look like this, where C<EXT> is one of the
extensions just listed.

  dir/tbl.EXT.000
  dir/tbl.EXT.000.gz

By default, it loads C<SQL> files first, if they exist, then loads C<CSV> or
C<TXT> files next, in order of the numbers in the filename extension as just
shown.  This makes it easy for you to reload a table's definition followed by
its data, in case you dumped them into separate files (as happens with
C<mysqldump>'s C<--tab> option).  It loads C<TRG> files, which create
triggers, last.  Creating the triggers before loading data might keep the data
from being restored correctly.  Files that are named 00_views.sql are loaded
even later, after all the parallel restores are finished; dependencies among
views and tables make them hard to restore one at a time.  See
L<mk-parallel-dump> for details on how data is dumped.

Exit status is 0 if everything went well, 1 if any files failed, and any
other value indicates an internal error.

=head1 OUTPUT

Output depends on verbosity.  When L<"--test"> is given, output includes
commands that would be executed.

When L<"--verbose"> is 0, there is normally no output unless there's an error.

When L<"--verbose"> is 1, there is one line of output for the entire job,
showing how many tables were processed, how many files were loaded with what
status, how much time elapsed, and how much time the parallel load jobs added
up to.  If any files were skipped, the filenames are printed to the output.

When L<"--verbose"> is 2, there's one line of output per table, showing extra
data such as how many threads were running when each table finished loading:

  DATABASE TABLE            FILES  TIME STATUS THREADS
  sakila   language             2  0.07      0       2
  sakila   film_actor           2  0.07      0       2
  sakila   actor                2  0.06      0       2
  sakila   payment              2  0.07      0       2
  sakila   transport_backup     2  0.05      0       2
  sakila   country              2  0.08      0       2
  sakila   film                 2  0.05      0       2
  sakila   rental               2  0.07      0       2

=head1 SPEED OF PARALLEL LOADING

User-contributed benchmarks are welcome.  See
L<http://www.paragon-cs.com/wordpress/?p=52> for one user's experiences.

=head1 OPTIONS

Some options can be disabled by prefixing them with C<--no>.

=over

=item --basedir

Directory in which temporary files, such as FIFO files (see L<"--fifo">) will be
created.

=item --bulkinsbufsize

Sets the bulk_insert_buffer_size variable before each C<LOAD DATA INFILE>.
Has no effect without L<"--tab">.

=item --charset

Sets the connection, database, and C<LOAD DATA INFILE> character set.  The
default is C<BINARY>, which is the safest value to use for C<LOAD DATA
INFILE>.  Has no effect without L<"--tab">.

=item --commit

Commit between each file it loads via C<LOAD DATA INFILE>.

=item --createdb

Create databases if they don't exist.

=item --csv

Changes L<"--tab"> options so the following C<LOAD DATA INFILE> statement is used:

   LOAD DATA INFILE <filename> INTO TABLE <table>
   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\"'
   LINES TERMINATED BY '\n';

This option implies L<"--tab">.

=item --database

Specifies a database into which all files should be loaded.  Overrides the
database which is normally specified by the directory in which the files live.
Does I<not> specify a default database for the connection.

=item --databases

Load only this comma-separated list of databases.

=item dbregex

Load only databases whose names match this Perl regular expression.

=item --defaults-file

Only read default options from the given file.  You must give an absolute
pathname.

=item --disablekeys

Use C<ALTER TABLE DISABLE KEYS> before loading files into a table.

=item --fifo

Load compressed tab-separated files by piping them into a FIFO and using the
FIFO with C<LOAD DATA INFILE>, instead of by decompressing the files on disk.
Sets L<"--umask"> to 0.

=item --help

Displays a help message.

=item --host

Connect to host.

=item --ignore

Adds the C<IGNORE> modifier to C<LOAD DATA INFILE>.

=item --ignoredb

Do not load this comma-separated list of databases.

=item --ignoretbl

Do not restore this comma-separated list of table names.  Table names may be
qualified with the database name.

=item --local

Uses the C<LOCAL> modifier to C<LOAD DATA INFILE>, so the files are read locally
by the client library, not by the server.

=item --locktables

Lock tables before C<LOAD DATA INFILE> (disabled by default).

=item --noautovalon0

Set the SQL mode to C<NO_AUTO_VALUE_ON_ZERO> before C<LOAD DATA INFILE>.

=item --nobinlog

Set C<SQL_LOG_BIN=0> before C<LOAD DATA INFILE>.  This prevents large loads
from being logged to the server's binary log.

=item --noforeignkeys

Set C<FOREIGN_KEY_CHECKS=0> before C<LOAD DATA INFILE>.

=item --nouniquechecks

Set C<UNIQUE_CHECKS=0> before C<LOAD DATA INFILE>.

=item --numthread

Specifies the number of parallel processes to run.  The default is 2 (this is
mk-parallel-restore after all -- 1 is not parallel).  On GNU/Linux machines,
the default is the number of times 'processor' appears in F</proc/cpuinfo>.  On
Windows, the default is read from the environment.  In any case, the default is
at least 2, even when there's only a single processor.

=item --password

Password to use when connecting.

=item --port

Port number to use for connection.

=item --quiet

Sets L<"--verbose"> to 0.

=item --replace

Adds the C<REPLACE> modifier to C<LOAD DATA INFILE>.

=item --setvars

Specify any variables you want to be set immediately after connecting to MySQL.
These will be included in a C<SET> command.

=item --socket

Socket file to use for connection.

=item --tab

Load via C<LOAD DATA INFILE>, which is similar to what C<mysqlimport> does, but
more flexibly.

Enables the following options, unless they are specifically disabled:
L<"--commit">, L<"--disablekeys">, L<"--noautovalon0">, L<"--nobinlog">,
L<"--nouniquechecks">, L<"--noforeignkeys">.

=item --tables

Restore this comma-separated list of table names.  Table names may be
qualified with the database name.

=item --tblregex

Restore only tables whose names match this Perl regular expression.

=item --test

Print commands instead of executing them.

=item --truncate

Issues C<TRUNCATE TABLE> to delete all rows from a table before loading the
first tab-delimited file into it with C<LOAD DATA INFILE>.

=item --umask

Set the program's C<umask> to this octal value.  This is useful when you want
created files (such as FIFO files) to be readable or writable by other users
(for example, the MySQL server itself).

=item --user

User for login if not current user.

=item --verbose

Sets the verbosity; repeatedly specifying it increments the verbosity.
Default is 1 if not specified.  See L<"OUTPUT">.

=item --version

Output version information and exit.

=item --wait

If the MySQL server crashes during loading, waits until the server comes back
and then continues with the rest of the files.  C<mk-parallel-restore> will
check the server every second until this time is exhausted, at which point it
will give up and exit.

=back

=head1 ENVIRONMENT

The environment variable C<MKDEBUG> enables verbose debugging output in all of
the Maatkit tools:

   MKDEBUG=1 mk-....

=head1 SYSTEM REQUIREMENTS

You need Perl, DBI, DBD::mysql, and some core packages that ought to be
installed in any reasonably new version of Perl.

=head1 BUGS

Please use the Sourceforge bug tracker, forums, and mailing lists to request
support or report bugs: L<http://sourceforge.net/projects/maatkit/>.

=head1 COPYRIGHT, LICENSE AND WARRANTY

This program is copyright (c) 2007 Baron Schwartz.  Feedback and improvements
are welcome.

THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, version 2; OR the Perl Artistic License.  On UNIX and similar
systems, you can issue `man perlgpl' or `man perlartistic' to read these
licenses.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA  02111-1307  USA.

=head1 AUTHOR

Baron Schwartz.

=head1 SEE ALSO

See also L<mk-parallel-dump>.

=head1 VERSION

This manual page documents Ver 1.0.6 Distrib 1877 $Revision: 1871 $.

=cut
