NAME

       CPANDB - A unified database of CPAN metadata information

DESCRIPTION

       CPANDB is an module for accessing CPAN metadata merged from many different CPAN websites
       into a single object model, downloaded automatically and without the need for any
       configuration.

METHODS

   dsn
         my $string = CPANDB->dsn;

       The "dsn" accessor returns the DBI connection string used to connect to the SQLite
       database as a string.

   dbh
         my $handle = CPANDB->dbh;

       To reliably prevent potential SQLite deadlocks resulting from multiple connections in a
       single process, each ORLite package will only ever maintain a single connection to the
       database.

       During a transaction, this will be the same (cached) database handle.

       Although in most situations you should not need a direct DBI connection handle, the "dbh"
       method provides a method for getting a direct connection in a way that is compatible with
       connection management in ORLite.

       Please note that these connections should be short-lived, you should never hold onto a
       connection beyond your immediate scope.

       The transaction system in ORLite is specifically designed so that code using the database
       should never have to know whether or not it is in a transation.

       Because of this, you should never call the ->disconnect method on the database handles
       yourself, as the handle may be that of a currently running transaction.

       Further, you should do your own transaction management on a handle provided by the <dbh>
       method.

       In cases where there are extreme needs, and you absolutely have to violate these
       connection handling rules, you should create your own completely manual DBI->connect call
       to the database, using the connect string provided by the "dsn" method.

       The "dbh" method returns a DBI::db object, or throws an exception on error.

   begin
         CPANDB->begin;

       The "begin" method indicates the start of a transaction.

       In the same way that ORLite allows only a single connection, likewise it allows only a
       single application-wide transaction.

       No indication is given as to whether you are currently in a transaction or not, all code
       should be written neutrally so that it works either way or doesn't need to care.

       Returns true or throws an exception on error.

   rollback
       The "rollback" method rolls back the current transaction. If called outside of a current
       transaction, it is accepted and treated as a null operation.

       Once the rollback has been completed, the database connection falls back into auto-commit
       state. If you wish to immediately start another transaction, you will need to issue a
       separate ->begin call.

       If a transaction exists at END-time as the process exits, it will be automatically rolled
       back.

       Returns true or throws an exception on error.

   do
         CPANDB->do(
             'insert into table ( foo, bar ) values ( ?, ? )', {},
             \$foo_value,
             \$bar_value,
         );

       The "do" method is a direct wrapper around the equivalent DBI method, but applied to the
       appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectall_arrayref
       The "selectall_arrayref" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectall_hashref
       The "selectall_hashref" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectcol_arrayref
       The "selectcol_arrayref" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectrow_array
       The "selectrow_array" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectrow_arrayref
       The "selectrow_arrayref" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   selectrow_hashref
       The "selectrow_hashref" method is a direct wrapper around the equivalent DBI method, but
       applied to the appropriate locally-provided connection or transaction.

       It takes the same parameters and has the same return values and error behaviour.

   prepare
       The "prepare" method is a direct wrapper around the equivalent DBI method, but applied to
       the appropriate locally-provided connection or transaction

       It takes the same parameters and has the same return values and error behaviour.

       In general though, you should try to avoid the use of your own prepared statements if
       possible, although this is only a recommendation and by no means prohibited.

   pragma
         # Get the user_version for the schema
         my $version = CPANDB->pragma('user_version');

       The "pragma" method provides a convenient method for fetching a pragma for a database. See
       the SQLite documentation for more details.

SUPPORT

       CPANDB is based on ORLite.

       Documentation created by ORLite::Pod 0.10.

       Bugs should be reported via the CPAN bug tracker at

       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CPANDB>

       For other issues, contact the author.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2009 - 2012 Adam Kennedy.

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

       The full text of the license can be found in the LICENSE file included with this module.