TableSelect::lockShared

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TableSelect::lockSharedExecute 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
        )
)