[usenet/newsstats.git] / gatherstats.pl

#! /usr/bin/perl -W
#
# gatherstats.pl
#
# This script will gather statistical information from a database
# containing headers and other information from a INN feed.
# 
# It is part of the NewsStats package.
#
# Copyright (c) 2010-2012 Thomas Hochstein <thh@inter.net>
#
# It can be redistributed and/or modified under the same terms under 
# which Perl itself is published.

BEGIN {
  our $VERSION = "0.01";
  use File::Basename;
  push(@INC, dirname($0));
}
use strict;

use NewsStats qw(:DEFAULT :TimePeriods ListNewsgroups ReadGroupList);

use DBI;
use Getopt::Long qw(GetOptions);
Getopt::Long::config ('bundling');

################################# Definitions ##################################

# define types of information that can be gathered
# all / groups (/ clients / hosts)
my %LegalStats;
@LegalStats{('all','groups')} = ();

################################# Main program #################################

### read commandline options
my ($OptCheckgroupsFile,$OptClientsDB,$OptDebug,$OptGroupsDB,$OptTLH,
    $OptHostsDB,$OptMonth,$OptRawDB,$OptStatsType,$OptTest);
GetOptions ('c|checkgroups=s' => \$OptCheckgroupsFile,
            'clientsdb=s'     => \$OptClientsDB,
            'd|debug!'        => \$OptDebug,
            'groupsdb=s'      => \$OptGroupsDB,
            'hierarchy=s'     => \$OptTLH,
            'hostsdb=s'       => \$OptHostsDB,
            'm|month=s'       => \$OptMonth,
            'rawdb=s'         => \$OptRawDB,
            's|stats=s'       => \$OptStatsType,
            't|test!'         => \$OptTest,
            'h|help'          => \&ShowPOD,
            'V|version'       => \&ShowVersion) or exit 1;

### read configuration
my %Conf = %{ReadConfig($HomePath.'/newsstats.conf')};

### override configuration via commandline options
my %ConfOverride;
$ConfOverride{'DBTableRaw'}   = $OptRawDB if $OptRawDB;
$ConfOverride{'DBTableGrps'}  = $OptGroupsDB if $OptGroupsDB;
$ConfOverride{'DBTableClnts'} = $OptClientsDB if $OptClientsDB;
$ConfOverride{'DBTableHosts'} = $OptHostsDB if $OptHostsDB;
$ConfOverride{'TLH'} = $OptTLH if $OptTLH;
&OverrideConfig(\%Conf,\%ConfOverride);

### get type of information to gather, defaulting to 'all'
$OptStatsType = 'all' if !$OptStatsType;
&Bleat(2, sprintf("Unknown type '%s'!", $OptStatsType))
  if !exists($LegalStats{$OptStatsType});

### get time period from --month
# get verbal description of time period, drop SQL code
my ($Period) = &GetTimePeriod($OptMonth);
&Bleat(2,"--month option has an invalid format - please use 'YYYY-MM' or ".
         "'YYYY-MM:YYYY-MM'!") if (!$Period or $Period eq 'all time');

### reformat $Conf{'TLH'}
my $TLH;
if ($Conf{'TLH'}) {
  # $Conf{'TLH'} is parsed as an array by Config::Auto;
  # make a flat list again, separated by :
  if (ref($TLH) eq 'ARRAY') {
    $TLH = join(':',@{$Conf{'TLH'}});
  } else {
    $TLH  = $Conf{'TLH'};
  }
  # strip whitespace
  $TLH =~ s/\s//g;
  # check for illegal characters
  &Bleat(2,'Config error - illegal characters in TLH definition!')
    if ($TLH !~ /^[a-zA-Z0-9:]+$/);
  if ($TLH =~ /:/) {
    # reformat $TLH from a:b to (a)|(b),
    # e.g. replace '.' by '|'
    $TLH =~ s/:/)|(/g;
    $TLH = '(' . $TLH . ')';
  };
};

# read list of newsgroups from --checkgroups
# into a hash
my %ValidGroups = %{ReadGroupList($OptCheckgroupsFile)} if $OptCheckgroupsFile;

### init database
my $DBHandle = InitDB(\%Conf,1);

### get data for each month
&Bleat(1,'Test mode. Database is not updated.') if $OptTest;
foreach my $Month (&ListMonth($Period)) {

  print "---------- $Month ----------\n" if $OptDebug;

  if ($OptStatsType eq 'all' or $OptStatsType eq 'groups') {
    ### ----------------------------------------------
    ### get groups data (number of postings per group)
    # get groups data from raw table for given month
    my $DBQuery = $DBHandle->prepare(sprintf("SELECT newsgroups FROM %s.%s ".
                                             "WHERE day LIKE ? AND NOT disregard",
                                             $Conf{'DBDatabase'},
                                             $Conf{'DBTableRaw'}));
    $DBQuery->execute($Month.'-%')
      or &Bleat(2,sprintf("Can't get groups data for %s from %s.%s: ".
                          "$DBI::errstr\n",$Month,
                          $Conf{'DBDatabase'},$Conf{'DBTableRaw'}));

    # count postings per group
    my %Postings;
    while (($_) = $DBQuery->fetchrow_array) {
      # get list oft newsgroups and hierarchies from Newsgroups:
      my %Newsgroups = ListNewsgroups($_,$TLH,
                                      $OptCheckgroupsFile ? \%ValidGroups : '');
      # count each newsgroup and hierarchy once
      foreach (sort keys %Newsgroups) {
        $Postings{$_}++;
      };
    };

    # add valid but empty groups if --checkgroups is set
    if (%ValidGroups) {
      foreach (sort keys %ValidGroups) {
        if (!defined($Postings{$_})) {
          $Postings{$_} = 0 ;
          warn (sprintf("ADDED: %s as empty group\n",$_));
        }
      };
    };

    # delete old data for that month
    if (!$OptTest) {
      $DBQuery = $DBHandle->do(sprintf("DELETE FROM %s.%s WHERE month = ?",
                                       $Conf{'DBDatabase'},$Conf{'DBTableGrps'}),
                                       undef,$Month)
        or &Bleat(2,sprintf("Can't delete old groups data for %s from %s.%s: ".
                            "$DBI::errstr\n",$Month,
                            $Conf{'DBDatabase'},$Conf{'DBTableGrps'}));
    };

    print "----- GroupStats -----\n" if $OptDebug;
    foreach my $Newsgroup (sort keys %Postings) {
      print "$Newsgroup => $Postings{$Newsgroup}\n" if $OptDebug;
      if (!$OptTest) {
        # write to database
        $DBQuery = $DBHandle->prepare(sprintf("INSERT INTO %s.%s ".
                                              "(month,newsgroup,postings) ".
                                              "VALUES (?, ?, ?)",
                                              $Conf{'DBDatabase'},
                                              $Conf{'DBTableGrps'}));
        $DBQuery->execute($Month, $Newsgroup, $Postings{$Newsgroup})
          or &Bleat(2,sprintf("Can't write groups data for %s/%s to %s.%s: ".
                              "$DBI::errstr\n",$Month,$Newsgroup,
                              $Conf{'DBDatabase'},$Conf{'DBTableGrps'}));
        $DBQuery->finish;
      };
    };
  } else {
    # other types of information go here - later on
  };
};

### close handles
$DBHandle->disconnect;

__END__

################################ Documentation #################################

=head1 NAME

gatherstats - process statistical data from a raw source

=head1 SYNOPSIS

B<gatherstats> [B<-Vhdt>] [B<-m> I<YYYY-MM> | I<YYYY-MM:YYYY-MM>] [B<-s> I<stats] [B<-c> I<checkgroups file>]] [B<--hierarchy> I<TLH>] [B<--rawdb> I<database table>] [B<-groupsdb> I<database table>] [B<--clientsdb> I<database table>] [B<--hostsdb> I<database table>]

=head1 REQUIREMENTS

See L<doc/README>.

=head1 DESCRIPTION

This script will extract and process statistical information from a
database table which is fed from F<feedlog.pl> for a given time period
and write its results to (an)other database table(s). Entries marked
with I<'disregard'> in the database will be ignored; currently, you
have to set this flag yourself, using your database management tools.
You can exclude erroneous entries that way (e.g. automatic reposts
(think of cancels flood and resurrectors); spam; ...).

The time period to act on defaults to last month; you can assign
another time period or a single month via the B<--month> option (see
below).

By default B<gatherstats> will process all types of information; you
can change that using the B<--stats> option and assigning the type of
information to process. Currently that doesn't matter yet as only
processing of the number of postings per group per month is
implemented anyway.

Possible information types include:

=over 3

=item B<groups> (postings per group per month)

B<gatherstats> will examine Newsgroups: headers. Crosspostings will be
counted for each single group they appear in. Groups not in I<TLH>
will be ignored.

B<gatherstats> will also add up the number of postings for each
hierarchy level, but only count each posting once. A posting to
de.alt.test will be counted for de.alt.test, de.alt.ALL and de.ALL,
respectively. A crossposting to de.alt.test and de.alt.admin, on the
other hand, will be counted for de.alt.test and de.alt.admin each, but
only once for de.alt.ALL and de.ALL.

Data is written to I<DBTableGrps> (see L<doc/INSTALL>); you can
override that default through the B<--groupsdb> option.

=back

=head2 Configuration

B<gatherstats> will read its configuration from F<newsstats.conf>
which should be present in the same directory via Config::Auto.

See L<doc/INSTALL> for an overview of possible configuration options.

You can override configuration options via the B<--hierarchy>,
B<--rawdb>, B<--groupsdb>, B<--clientsdb> and B<--hostsdb> options,
respectively.

=head1 OPTIONS

=over 3

=item B<-V>, B<--version>

Print out version and copyright information and exit.

=item B<-h>, B<--help>

Print this man page and exit.

=item B<-d>, B<--debug>

Output debugging information to STDOUT while processing (number of
postings per group).

=item B<-t>, B<--test>

Do not write results to database. You should use B<--debug> in
conjunction with B<--test> ... everything else seems a bit pointless.

=item B<-m>, B<--month> I<YYYY-MM[:YYYY-MM]>

Set processing period to a single month in YYYY-MM format or to a time
period between two month in YYYY-MM:YYYY-MM format (two month, separated
by a colon). 


=item B<-s>, B<--stats> I<type>

Set processing type to one of I<all> and I<groups>. Defaults to all
(and is currently rather pointless as only I<groups> has been
implemented).

=item B<-c>, B<--checkgroups> I<filename>

Check each group against a list of valid newsgroups read from
I<filename>, one group on each line and ignoring everything after the
first whitespace (so you can use a file in checkgroups format or (part
of) your INN active file).

Newsgroups not found in I<filename> will be dropped (and logged to
STDERR), and newsgroups found in I<filename> but having no postings
will be added with a count of 0 (and logged to STDERR).

=item B<--hierarchy> I<TLH> (newsgroup hierarchy)

Override I<TLH> from F<newsstats.conf>.

=item B<--rawdb> I<table> (raw data table)

Override I<DBTableRaw> from F<newsstats.conf>.

=item B<--groupsdb> I<table> (postings per group table)

Override I<DBTableGrps> from F<newsstats.conf>.

=item B<--clientsdb> I<table> (client data table)

Override I<DBTableClnts> from F<newsstats.conf>.

=item B<--hostsdb> I<table> (host data table)

Override I<DBTableHosts> from F<newsstats.conf>.

=back

=head1 INSTALLATION

See L<doc/INSTALL>.

=head1 EXAMPLES

Process all types of information for lasth month:

    gatherstats

Do a dry run, showing results of processing:

    gatherstats --debug --test

Process all types of information for January of 2010:

    gatherstats --month 2010-01

Process only number of postings for the year of 2010,
checking against checkgroups-2010.txt:

    gatherstats -m 2010-01:2010-12 -s groups -c checkgroups-2010.txt

=head1 FILES

=over 4

=item F<gatherstats.pl>

The script itself.

=item F<NewsStats.pm>

Library functions for the NewsStats package.

=item F<newsstats.conf>

Runtime configuration file.

=back

=head1 BUGS

Please report any bugs or feature requests to the author or use the
bug tracker at L<http://bugs.th-h.de/>!

=head1 SEE ALSO

=over 2

=item -

L<doc/README>

=item -

L<doc/INSTALL>

=back

This script is part of the B<NewsStats> package.

=head1 AUTHOR

Thomas Hochstein <thh@inter.net>

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2010-2012 Thomas Hochstein <thh@inter.net>

This program is free software; you may redistribute it and/or modify it
under the same terms as Perl itself.

=cut
Commit	Line	Data
	1	#! /usr/bin/perl -W
	2	#
	3	# gatherstats.pl
	4	#
	5	# This script will gather statistical information from a database
	6	# containing headers and other information from a INN feed.
	7	#
	8	# It is part of the NewsStats package.
	9	#
	10	# Copyright (c) 2010-2012 Thomas Hochstein <thh@inter.net>
	11	#
	12	# It can be redistributed and/or modified under the same terms under
	13	# which Perl itself is published.
	14
	15	BEGIN {
	16	our $VERSION = "0.01";
	17	use File::Basename;
	18	push(@INC, dirname($0));
	19	}
	20	use strict;
	21
	22	use NewsStats qw(:DEFAULT :TimePeriods ListNewsgroups ReadGroupList);
	23
	24	use DBI;
	25	use Getopt::Long qw(GetOptions);
	26	Getopt::Long::config ('bundling');
	27
	28	################################# Definitions ##################################
	29
	30	# define types of information that can be gathered
	31	# all / groups (/ clients / hosts)
	32	my %LegalStats;
	33	@LegalStats{('all','groups')} = ();
	34
	35	################################# Main program #################################
	36
	37	### read commandline options
	38	my ($OptCheckgroupsFile,$OptClientsDB,$OptDebug,$OptGroupsDB,$OptTLH,
	39	$OptHostsDB,$OptMonth,$OptRawDB,$OptStatsType,$OptTest);
	40	GetOptions ('c\|checkgroups=s' => \$OptCheckgroupsFile,
	41	'clientsdb=s' => \$OptClientsDB,
	42	'd\|debug!' => \$OptDebug,
	43	'groupsdb=s' => \$OptGroupsDB,
	44	'hierarchy=s' => \$OptTLH,
	45	'hostsdb=s' => \$OptHostsDB,
	46	'm\|month=s' => \$OptMonth,
	47	'rawdb=s' => \$OptRawDB,
	48	's\|stats=s' => \$OptStatsType,
	49	't\|test!' => \$OptTest,
	50	'h\|help' => \&ShowPOD,
	51	'V\|version' => \&ShowVersion) or exit 1;
	52
	53	### read configuration
	54	my %Conf = %{ReadConfig($HomePath.'/newsstats.conf')};
	55
	56	### override configuration via commandline options
	57	my %ConfOverride;
	58	$ConfOverride{'DBTableRaw'} = $OptRawDB if $OptRawDB;
	59	$ConfOverride{'DBTableGrps'} = $OptGroupsDB if $OptGroupsDB;
	60	$ConfOverride{'DBTableClnts'} = $OptClientsDB if $OptClientsDB;
	61	$ConfOverride{'DBTableHosts'} = $OptHostsDB if $OptHostsDB;
	62	$ConfOverride{'TLH'} = $OptTLH if $OptTLH;
	63	&OverrideConfig(\%Conf,\%ConfOverride);
	64
	65	### get type of information to gather, defaulting to 'all'
	66	$OptStatsType = 'all' if !$OptStatsType;
	67	&Bleat(2, sprintf("Unknown type '%s'!", $OptStatsType))
	68	if !exists($LegalStats{$OptStatsType});
	69
	70	### get time period from --month
	71	# get verbal description of time period, drop SQL code
	72	my ($Period) = &GetTimePeriod($OptMonth);
	73	&Bleat(2,"--month option has an invalid format - please use 'YYYY-MM' or ".
	74	"'YYYY-MM:YYYY-MM'!") if (!$Period or $Period eq 'all time');
	75
	76	### reformat $Conf{'TLH'}
	77	my $TLH;
	78	if ($Conf{'TLH'}) {
	79	# $Conf{'TLH'} is parsed as an array by Config::Auto;
	80	# make a flat list again, separated by :
	81	if (ref($TLH) eq 'ARRAY') {
	82	$TLH = join(':',@{$Conf{'TLH'}});
	83	} else {
	84	$TLH = $Conf{'TLH'};
	85	}
	86	# strip whitespace
	87	$TLH =~ s/\s//g;
	88	# check for illegal characters
	89	&Bleat(2,'Config error - illegal characters in TLH definition!')
	90	if ($TLH !~ /^[a-zA-Z0-9:]+$/);
	91	if ($TLH =~ /:/) {
	92	# reformat $TLH from a:b to (a)\|(b),
	93	# e.g. replace '.' by '\|'
	94	$TLH =~ s/:/)\|(/g;
	95	$TLH = '(' . $TLH . ')';
	96	};
	97	};
	98
	99	# read list of newsgroups from --checkgroups
	100	# into a hash
	101	my %ValidGroups = %{ReadGroupList($OptCheckgroupsFile)} if $OptCheckgroupsFile;
	102
	103	### init database
	104	my $DBHandle = InitDB(\%Conf,1);
	105
	106	### get data for each month
	107	&Bleat(1,'Test mode. Database is not updated.') if $OptTest;
	108	foreach my $Month (&ListMonth($Period)) {
	109
	110	print "---------- $Month ----------\n" if $OptDebug;
	111
	112	if ($OptStatsType eq 'all' or $OptStatsType eq 'groups') {
	113	### ----------------------------------------------
	114	### get groups data (number of postings per group)
	115	# get groups data from raw table for given month
	116	my $DBQuery = $DBHandle->prepare(sprintf("SELECT newsgroups FROM %s.%s ".
	117	"WHERE day LIKE ? AND NOT disregard",
	118	$Conf{'DBDatabase'},
	119	$Conf{'DBTableRaw'}));
	120	$DBQuery->execute($Month.'-%')
	121	or &Bleat(2,sprintf("Can't get groups data for %s from %s.%s: ".
	122	"$DBI::errstr\n",$Month,
	123	$Conf{'DBDatabase'},$Conf{'DBTableRaw'}));
	124
	125	# count postings per group
	126	my %Postings;
	127	while (($_) = $DBQuery->fetchrow_array) {
	128	# get list oft newsgroups and hierarchies from Newsgroups:
	129	my %Newsgroups = ListNewsgroups($_,$TLH,
	130	$OptCheckgroupsFile ? \%ValidGroups : '');
	131	# count each newsgroup and hierarchy once
	132	foreach (sort keys %Newsgroups) {
	133	$Postings{$_}++;
	134	};
	135	};
	136
	137	# add valid but empty groups if --checkgroups is set
	138	if (%ValidGroups) {
	139	foreach (sort keys %ValidGroups) {
	140	if (!defined($Postings{$_})) {
	141	$Postings{$_} = 0 ;
	142	warn (sprintf("ADDED: %s as empty group\n",$_));
	143	}
	144	};
	145	};
	146
	147	# delete old data for that month
	148	if (!$OptTest) {
	149	$DBQuery = $DBHandle->do(sprintf("DELETE FROM %s.%s WHERE month = ?",
	150	$Conf{'DBDatabase'},$Conf{'DBTableGrps'}),
	151	undef,$Month)
	152	or &Bleat(2,sprintf("Can't delete old groups data for %s from %s.%s: ".
	153	"$DBI::errstr\n",$Month,
	154	$Conf{'DBDatabase'},$Conf{'DBTableGrps'}));
	155	};
	156
	157	print "----- GroupStats -----\n" if $OptDebug;
	158	foreach my $Newsgroup (sort keys %Postings) {
	159	print "$Newsgroup => $Postings{$Newsgroup}\n" if $OptDebug;
	160	if (!$OptTest) {
	161	# write to database
	162	$DBQuery = $DBHandle->prepare(sprintf("INSERT INTO %s.%s ".
	163	"(month,newsgroup,postings) ".
	164	"VALUES (?, ?, ?)",
	165	$Conf{'DBDatabase'},
	166	$Conf{'DBTableGrps'}));
	167	$DBQuery->execute($Month, $Newsgroup, $Postings{$Newsgroup})
	168	or &Bleat(2,sprintf("Can't write groups data for %s/%s to %s.%s: ".
	169	"$DBI::errstr\n",$Month,$Newsgroup,
	170	$Conf{'DBDatabase'},$Conf{'DBTableGrps'}));
	171	$DBQuery->finish;
	172	};
	173	};
	174	} else {
	175	# other types of information go here - later on
	176	};
	177	};
	178
	179	### close handles
	180	$DBHandle->disconnect;
	181
	182	__END__
	183
	184	################################ Documentation #################################
	185
	186	=head1 NAME
	187
	188	gatherstats - process statistical data from a raw source
	189
	190	=head1 SYNOPSIS
	191
	192	B<gatherstats> [B<-Vhdt>] [B<-m> I<YYYY-MM> \| I<YYYY-MM:YYYY-MM>] [B<-s> I<stats] [B<-c> I<checkgroups file>]] [B<--hierarchy> I<TLH>] [B<--rawdb> I<database table>] [B<-groupsdb> I<database table>] [B<--clientsdb> I<database table>] [B<--hostsdb> I<database table>]
	193
	194	=head1 REQUIREMENTS
	195
	196	See L<doc/README>.
	197
	198	=head1 DESCRIPTION
	199
	200	This script will extract and process statistical information from a
	201	database table which is fed from F<feedlog.pl> for a given time period
	202	and write its results to (an)other database table(s). Entries marked
	203	with I<'disregard'> in the database will be ignored; currently, you
	204	have to set this flag yourself, using your database management tools.
	205	You can exclude erroneous entries that way (e.g. automatic reposts
	206	(think of cancels flood and resurrectors); spam; ...).
	207
	208	The time period to act on defaults to last month; you can assign
	209	another time period or a single month via the B<--month> option (see
	210	below).
	211
	212	By default B<gatherstats> will process all types of information; you
	213	can change that using the B<--stats> option and assigning the type of
	214	information to process. Currently that doesn't matter yet as only
	215	processing of the number of postings per group per month is
	216	implemented anyway.
	217
	218	Possible information types include:
	219
	220	=over 3
	221
	222	=item B<groups> (postings per group per month)
	223
	224	B<gatherstats> will examine Newsgroups: headers. Crosspostings will be
	225	counted for each single group they appear in. Groups not in I<TLH>
	226	will be ignored.
	227
	228	B<gatherstats> will also add up the number of postings for each
	229	hierarchy level, but only count each posting once. A posting to
	230	de.alt.test will be counted for de.alt.test, de.alt.ALL and de.ALL,
	231	respectively. A crossposting to de.alt.test and de.alt.admin, on the
	232	other hand, will be counted for de.alt.test and de.alt.admin each, but
	233	only once for de.alt.ALL and de.ALL.
	234
	235	Data is written to I<DBTableGrps> (see L<doc/INSTALL>); you can
	236	override that default through the B<--groupsdb> option.
	237
	238	=back
	239
	240	=head2 Configuration
	241
	242	B<gatherstats> will read its configuration from F<newsstats.conf>
	243	which should be present in the same directory via Config::Auto.
	244
	245	See L<doc/INSTALL> for an overview of possible configuration options.
	246
	247	You can override configuration options via the B<--hierarchy>,
	248	B<--rawdb>, B<--groupsdb>, B<--clientsdb> and B<--hostsdb> options,
	249	respectively.
	250
	251	=head1 OPTIONS
	252
	253	=over 3
	254
	255	=item B<-V>, B<--version>
	256
	257	Print out version and copyright information and exit.
	258
	259	=item B<-h>, B<--help>
	260
	261	Print this man page and exit.
	262
	263	=item B<-d>, B<--debug>
	264
	265	Output debugging information to STDOUT while processing (number of
	266	postings per group).
	267
	268	=item B<-t>, B<--test>
	269
	270	Do not write results to database. You should use B<--debug> in
	271	conjunction with B<--test> ... everything else seems a bit pointless.
	272
	273	=item B<-m>, B<--month> I<YYYY-MM[:YYYY-MM]>
	274
	275	Set processing period to a single month in YYYY-MM format or to a time
	276	period between two month in YYYY-MM:YYYY-MM format (two month, separated
	277	by a colon).
	278
	279
	280	=item B<-s>, B<--stats> I<type>
	281
	282	Set processing type to one of I<all> and I<groups>. Defaults to all
	283	(and is currently rather pointless as only I<groups> has been
	284	implemented).
	285
	286	=item B<-c>, B<--checkgroups> I<filename>
	287
	288	Check each group against a list of valid newsgroups read from
	289	I<filename>, one group on each line and ignoring everything after the
	290	first whitespace (so you can use a file in checkgroups format or (part
	291	of) your INN active file).
	292
	293	Newsgroups not found in I<filename> will be dropped (and logged to
	294	STDERR), and newsgroups found in I<filename> but having no postings
	295	will be added with a count of 0 (and logged to STDERR).
	296
	297	=item B<--hierarchy> I<TLH> (newsgroup hierarchy)
	298
	299	Override I<TLH> from F<newsstats.conf>.
	300
	301	=item B<--rawdb> I<table> (raw data table)
	302
	303	Override I<DBTableRaw> from F<newsstats.conf>.
	304
	305	=item B<--groupsdb> I<table> (postings per group table)
	306
	307	Override I<DBTableGrps> from F<newsstats.conf>.
	308
	309	=item B<--clientsdb> I<table> (client data table)
	310
	311	Override I<DBTableClnts> from F<newsstats.conf>.
	312
	313	=item B<--hostsdb> I<table> (host data table)
	314
	315	Override I<DBTableHosts> from F<newsstats.conf>.
	316
	317	=back
	318
	319	=head1 INSTALLATION
	320
	321	See L<doc/INSTALL>.
	322
	323	=head1 EXAMPLES
	324
	325	Process all types of information for lasth month:
	326
	327	gatherstats
	328
	329	Do a dry run, showing results of processing:
	330
	331	gatherstats --debug --test
	332
	333	Process all types of information for January of 2010:
	334
	335	gatherstats --month 2010-01
	336
	337	Process only number of postings for the year of 2010,
	338	checking against checkgroups-2010.txt:
	339
	340	gatherstats -m 2010-01:2010-12 -s groups -c checkgroups-2010.txt
	341
	342	=head1 FILES
	343
	344	=over 4
	345
	346	=item F<gatherstats.pl>
	347
	348	The script itself.
	349
	350	=item F<NewsStats.pm>
	351
	352	Library functions for the NewsStats package.
	353
	354	=item F<newsstats.conf>
	355
	356	Runtime configuration file.
	357
	358	=back
	359
	360	=head1 BUGS
	361
	362	Please report any bugs or feature requests to the author or use the
	363	bug tracker at L<http://bugs.th-h.de/>!
	364
	365	=head1 SEE ALSO
	366
	367	=over 2
	368
	369	=item -
	370
	371	L<doc/README>
	372
	373	=item -
	374
	375	L<doc/INSTALL>
	376
	377	=back
	378
	379	This script is part of the B<NewsStats> package.
	380
	381	=head1 AUTHOR
	382
	383	Thomas Hochstein <thh@inter.net>
	384
	385	=head1 COPYRIGHT AND LICENSE
	386
	387	Copyright (c) 2010-2012 Thomas Hochstein <thh@inter.net>
	388
	389	This program is free software; you may redistribute it and/or modify it
	390	under the same terms as Perl itself.
	391
	392	=cut