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Merge pull request #8511 from jmfederico/patch-1

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Update comment about locks in MySQL
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Sam Minnée 2018-11-05 22:32:18 +13:00 committed by GitHub
commit 536e2d6835
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1 changed files with 3 additions and 2 deletions
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src/ORM/Connect/MySQLDatabase.php
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@ -495,8 +495,9 @@ class MySQLDatabase extends Database
{
$id = $this->getLockIdentifier($name);
// MySQL auto-releases existing locks on subsequent GET_LOCK() calls,
// in contrast to PostgreSQL and SQL Server who stack the locks.
// MySQL 5.7.4 and below auto-releases existing locks on subsequent GET_LOCK() calls.
// MySQL 5.7.5 and newer allow multiple locks per sessions even with the same name.
// https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html#function_get-lock
return (bool) $this->query(sprintf("SELECT GET_LOCK('%s', %d)", $id, $timeout))->value();
}