TableSelect::lockShared

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    TableSelect::lockShared — Execute SHARED LOCK

    Description

    public function mysql_xdevapi\TableSelect::lockShared(int $lock_waiting_option = ?): mysql_xdevapi\TableSelect

    Execute a read operation with SHARED LOCK. Only one lock can be active at a time.

    Parameters

    lock_waiting_option

    The optional waiting option that defaults to MYSQLX_LOCK_DEFAULT. Valid values are:

    Return Values

    A TableSelect object.

    Examples

    Example #1 mysql_xdevapi\TableSelect::lockShared() example

    <?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");

$schema = $session->getSchema("addressbook");
$table  = $schema->getTable("names");

$session->startTransaction();

$result = $table->select('name', 'age')
  ->lockShared(MYSQLX_LOCK_NOWAIT)
  ->execute();

$session->commit();

$row = $result->fetchAll();
print_r($row);
?>

    The above example will output something similar to:

    Array
(
    [0] => Array
        (
            [name] => John
            [age] => 42
        )
    [1] => Array
        (
            [name] => Sam
            [age] => 42
        )
)

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