NAME
Tangram::Cursor - traverse a result set
SYNOPSIS
use Tangram;
$cursor = $storage->cursor( $query_obj, $filter );
while (my $obj = $cursor->current())
{
# process $obj
$cursor->next();
}DESCRIPTION
A Cursor makes it possible to iterate over a result set without loading all the objects in memory.
INSTANCE METHODS
current
Returns the current object, or undef() if the result set is exhausted.
next
Moves to the next object in the result set, if any. Returns the new current object, or undef() if the result set is exhausted.
residue
Returns the values of the Expr that were passed to the retrieve directive of the Storage::select() or Storage::cursor() statement.
MULTIPLE CURSORS
Each Cursor has its own connection to the database, thus making it possible to have multiple active cursors.