对 Laravel 中的 cursor 语句的原始查询

Question

I have a set of raw queries that I want to transform into Illuminate\Database\Query\Builder and then fetch their data through the cursor() method. For example:

$queries = [];
$queries[] = 'SELECT * from users';
$queries[] = 'SELECT * from toys INNER JOIN users ON toys.owner_id = user.id';
$queries[] = 'SELECT * from toys';

$connection = \DB::connection();

foreach ($queries as $query) {
    $builder = $connection->query();
    // Pass some how the raw query to the builder
    $builder->raw($query);
    // Execute the statement with a cursor function
    foreach($builder->cursor() as $data) {
         // Do something
    }
}

The problem that I have is on how to pass the raw query to the Builder and then fetch the data trought the cursor method.

Any ideas?

Answer 1

According to the official API documentation you should be able to use cursor() just like select() .

$generator = DB::cursor('SELECT * from users'); 

foreach ($generator as $data) { ... }

$queries = [];
$queries[] = 'SELECT * from users';
$queries[] = 'SELECT * from toys INNER JOIN users ON toys.owner_id = user.id';
$queries[] = 'SELECT * from toys';

foreach ($queries as $query) {
    foreach(\DB::cursor($query) as $data) {
         // Do something
    }
}

\DB::connection()->cursor($query) is the same as \DB::cursor($query) . Through the magic method __call , the DatabaseManager ( DB Facade) pipes the cursor call to the default connection.