Execute SHARED LOCK
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    TableSelect::lockShared

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    TableSelect::lockShared — Execute SHARED LOCK

    Description

    public 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:

    • MYSQLX_LOCK_DEFAULT

    • MYSQLX_LOCK_NOWAIT

    • MYSQLX_LOCK_SKIP_LOCKED

    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
        )
)