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Alzabo::Runtime::JoinCursor - Cursor that returns arrays of C |
Alzabo::Runtime::JoinCursor - Cursor that returns arrays of Alzabo::Runtime::Row objects
use Alzabo::Runtime::JoinCursor;
my $cursor = $schema->join( tables => [ $foo, $bar ],
where => [ $foo->column('foo_id') => 1 ] );
while ( my @rows = $cursor->next_rows )
{
print $row[0]->select('foo'), "\n";
print $row[1]->select('bar'), "\n";
}
Objects in this class are used to return arrays Alzabo::Runtime::Row objects when requested. The cursor does not preload objects but rather creates them on demand, which is much more efficient. For more details on the rational please see the HANDLING ERRORS section in Alzabo::Runtime::Cursor.
The next array of Alzabo::Runtime::Row
objects or an empty list if no more are available.
This behavior can mask errors in your database's referential integrity. For more information on how to deal with this see the HANDLING ERRORS section in Alzabo::Runtime::Cursor.
All the rows available from the current point onwards. These are
returned as an array of array references. Each reference is to an
array of Alzabo::Runtime::Row objects.
This means that if there are five set of rows that will be returned
when the object is created and you call next_rows twice, calling
all_rows after it will only return three sets. Calling the
errors method after this will return all errors trapped during the
fetching of these sets of rows. The return value is an array of array
references. Each of these references represents a single set of rows
as they would be returned from the next_rows method.
Resets the cursor so that the next next_rows call will
return the first row of the set.
Dave Rolsky, <autarch@urth.org>
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Alzabo::Runtime::JoinCursor - Cursor that returns arrays of C |