Provided by: libcpan-sqlite-perl_0.220-1_all 
NAME
CPAN::SQLite::Search - perform queries on the database
VERSION
version 0.220
SYNOPSIS
my $max_results = 200;
my $query = CPAN::SQLite::Search->new(db_dir => $db_dir,
db_name => $db_name,
max_results => $max_results);
$query->query(mode => 'module', name => 'Net::FTP');
my $results = $query->{results};
CONSTRUCTING THE QUERY
This module queries the database via various types of queries and returns the results for
subsequent display. The "CPAN::SQLite::Search" object is created via the "new" method as
my $query = CPAN::SQLite::Search->new(db_dir => $db_dir,
db_name => $db_name,
max_results => $max_results);
which takes as arguments
• db_dir => $db_dir
This is the directory where the database file is stored. This is optional if the "CPAN"
option is given.
• CPAN => $CPAN
This option specifies the "cpan_home" directory of an already configured CPAN.pm, which
is where the database file will be stored if "db_dir" is not given.
• max_results => $max_results
This is the maximum value used to limit the number of results returned under a user
query. If not specified, a value contained within "CPAN::SQLite::Search" will be used.
A basic query then is constructed as
$query->query(mode => $mode, $type => $value);
with the results available as
my $results = $query->{results}
There are three basic modes:
• module
This is for information on modules.
• dist
This is for information on distributions.
• author
This is for information on CPAN authors or cpanids.
"module", "dist", and "author" modes
For a mode of "module", "dist", and "author", there are four basic options to be used for
the "$type => $value" option:
• query => $query_term
This will search through module names, distribution names, or CPAN author names and ids
(for "module", "dist", and "author" modes respectively). The results are case
insensitive, and Perl regular expressions for the $query_term are recognized.
• name => $name
This will report exact matches (in a case sensitive manner) for the module name,
distribution name, or CPAN author id, for "module", "dist", and "author" modes
respectively.
• id => $id
This will look up information on the primary key according to the mode specified. This
is more for internal use, to help speed up queries; using this "publically" is probably
not a good idea, as the ids may change over the course of time.
RESULTS
After making the query, the results can be accessed through
my $results = $query->{results};
No results either can mean no matches were found, or else an error in making the query
resulted (in which case, a brief error message is contained in "$query->{error}").
Assuming there are results, what is returned depends on the mode and on the type of query.
See CPAN::SQLite::Populate for a description of the fields in the various tables listed
below - these fields are used as the keys of the hash references that arise.
"author" mode
• "name" or "id" query
This returns the "auth_id", "cpanid", "email", and "fullname" of the "auths" table. As
well, an array reference "$results->{dists}" is returned representing all distributions
associated with that "cpanid" - each member of the array reference is a hash reference
describing the "dist_id", "dist_name", "dist_abs", "dist_vers", and "dist_file" fields
in the "dists" table. An additional entry, "download", is supplied, which can be used
as "$CPAN/authors/id/$download" to specify the url of the distribution.
• "query" query
If this results in more than one match, an array reference is returned, each member of
which is a hash reference containing the "auth_id", "cpanid", and "fullname" fields. If
there is only one result found, a "name" query based on the matched "cpanid" is
performed.
"module" mode
• "name" or "id" query
This returns the "mod_id", "mod_name", "mod_abs", "mod_vers", "dist_id", "dist_name",
"dist_file", "auth_id", "cpanid", "fullname", and "email" of the "auths", "mods", and
"dists" tables. As well, the following entries may be present.
• "download"
This can be used as "$CPAN/authors/id/$download" to specify the url of the
distribution.
• "query" query
If this results in more than one match, an array reference is returned, each member of
which is a hash reference containing the "mod_id", "mod_name", "mod_abs", "mod_abs",
"dist_vers", "dist_abs", "auth_id", "cpanid", "dist_id", "dist_name", and "dist_file".
As well, a "download" field which can be used as "$CPAN/authors/id/$download" to
specify the url of the distribution is provided. If there is only one result found, a
"name" query based on the matched "mod_name" is performed.
"dist" mode
• "name" or "id" query
This returns the "dist_id", "dist_name", "dist_abs", "dist_vers", "dist_file", "size",
"birth", "auth_id", "cpanid", and "fullname" of the "auths", "mods", and "dists"
tables. As well, the following entries may be present.
• "download"
This can be used as "$CPAN/authors/id/$download" to specify the url of the
distribution.
• "mods"
This is an array reference containing information on the modules present. Each entry
is a hash reference containing the "mod_id", "mod_name", "mod_abs", and "mod_vers"
fields for the module.
• "query" query
If this results in more than one match, an array reference is returned, each member of
which is a hash reference containing the "dist_id", "dist_name", "dist_abs",
"dist_file", and "cpanid" fields. As well, a "download" field which can be used as
"$CPAN/authors/id/$download" to specify the url of the distribution is provided. If
there is only one result found, a "name" query based on the matched "dist_name" is
performed.
SEE ALSO
CPAN::SQLite::Populate.
AUTHORS
Randy Kobes (passed away on September 18, 2010)
Serguei Trouchelle <stro@cpan.org>
COPYRIGHT
Copyright 2006,2008 by Randy Kobes <r.kobes@uwinnipeg.ca>.
Copyright 2011-2013 by Serguei Trouchelle <stro@cpan.org>.
Use and redistribution are under the same terms as Perl itself.