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TableSelect::lockShared

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TableSelect::lockShared โ€” SHARED LOCK ใ‚’ๅฎŸ่กŒใ™ใ‚‹

่ชฌๆ˜Ž

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

่ชญใฟๅ–ใ‚Šๆ“ไฝœใ‚’ SHARED LOCK ไป˜ใใงๅฎŸ่กŒใ—ใพใ™ใ€‚ ใ‚ขใ‚ฏใƒ†ใ‚ฃใƒ–ใซใชใ‚Œใ‚‹ใƒญใƒƒใ‚ฏใฏไธ€ๅบฆใซใฒใจใคใ ใ‘ใงใ™ใ€‚

ใƒ‘ใƒฉใƒกใƒผใ‚ฟ

lock_waiting_option

ใ‚ชใƒ—ใ‚ทใƒงใƒณใงๆŒ‡ๅฎšใงใใ‚‹ใ€ใƒญใƒƒใ‚ฏๅพ…ใกใฎใ‚ชใƒ—ใ‚ทใƒงใƒณใ€‚ ใƒ‡ใƒ•ใ‚ฉใƒซใƒˆใฏ MYSQLX_LOCK_DEFAULT ใงใ™ใ€‚ ๆœ‰ๅŠนใชๅ€คใฏไปฅไธ‹ใฎใจใŠใ‚Šใงใ™:

ๆˆปใ‚Šๅ€ค

TableSelect ใ‚ชใƒ–ใ‚ธใ‚งใ‚ฏใƒˆใ‚’่ฟ”ใ—ใพใ™ใ€‚

ไพ‹

ไพ‹1 mysql_xdevapi\TableSelect::lockShared() ใฎไพ‹

<?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);
?>

ไธŠใฎไพ‹ใฎๅ‡บๅŠ›ใฏใ€ ใŸใจใˆใฐไปฅไธ‹ใฎใ‚ˆใ†ใซใชใ‚Šใพใ™ใ€‚

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