=head1 NAME

DBIx::SQLEngine::Docs::ToDo - Tasks, ideas, and bugs


=head1 TO DO

There are a number of things that could be done to improve this module.


=head2 Tests

The test scripts are incomplete and ought to exercise much more of the public interface. Specific things to add to the test include:

Test for inserting, updating and selecting nulls, including "is null" test.

Tests for new transaction code.

Tests for null-value/empty-string distinction.

Find people to test drivers for Informix, Sybase, MS SQL.


=head2 Object Mapping

The handling of primary keys in Schema::Table and Schema::Column is not yet correct. The Record classes could also use a review to ensure primary keys are handled correctly throughout.


=head2 Driver Interface

There sure are a lot of fetch methods... But it's not clear how to
usefully simplify and combine them:

    			x_method()		x_rows()
     fetch_select	hashes			arrays
     visit_select	hashes => \&sub		arrays => \&sub
     fetchsub_select	hash_sub		array_sub
     fetch_one	 	one_hash		one_array
     fetch_one_value	one_value		one_list


=head2 Driver-Specific Features

Review DBIx::Compat; it seems like this information should map 
fairly directly to candidate methods and subclasses.

Consider interface for handling BLOBs on drivers where they need to be retrieved separately.

Consider interface for handling multiple simultaneous statement handles on drivers where this needs special treatement, such as Sybase.

Determine which features, if any, should be handled by an ODBC driver subclass.


=head2 Driver Internals

Determine the right way to handle the multiplexing drivers, DBD::Multiplex,
DBIx::DBCluster, and DBIx::HA, given that they may reconnect to a different
server in mid-stream. In practice, all of the servers in a pool are
typically of the same type so this may not be a major issue.

The column-information retrieve in DBIx::SQLEngine::Default should be using DBI's type_info methods.

Consider centralizing logging interface by making 'DBI', 'SQL' arguments to general function, or using a callback that could be hooked to log4perl.


=head2 Additional Criteria

The Criteria subclasses are incomplete. Candidates include: Inequality, SubString, CaseInsensitiveSubString.

Consider enabling pure-Perl interpretation of criteria to allow post-fetch processing by RecordSet objects:

  package DBIx::SQLEngine::Criteria::Equality;
  
  sub inverse { 'DBO::Criteria::Inequality' }
  
  # $flag = $crit->matches( $record );
  sub matches {
    my ($crit, $record) = @_;
    return ($crit->value( $record ) eq $crit->{'value'}) ? 1 : 0;
  }


=head1 SEE ALSO 

L<DBIx::SQLEngine::ReadMe>

=cut
