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Merged
blizzz merged 2 commits into from
Jan 11, 2021
Merged

Don't try a transaction for the migrator on MySQL #25038

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3cdfe7b
Don't try a transaction for the migrator on MySQL
nickvergessen Jan 8, 2021
2d34ca4
Only rollback when not MySQL
nickvergessen Jan 11, 2021
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Don't try a transaction for the migrator on MySQL 
As per https://dev.mysql.com/doc/refman/8.0/en/implicit-commit.html
CREATE TABLE statements automatically commit always. The only reason
this worked in the past was that PHPs PDO connection didn't check the
actual state on commit, but only checked their internal state.
But in PHP8 this was fixed:
https://github.com/php/php-src/blob/PHP-8.0/UPGRADING#L446-L450
So now commit() fails because the internal PDO connection implicitly
commited already.

Signed-off-by: Joas Schilling <[email protected]>
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@nickvergessen
nickvergessen committed Jan 8, 2021
commit 3cdfe7b0f40a52b39f128a86f00ed5c04398693b
9 changes: 7 additions & 2 deletions lib/private/DB/Migrator.php
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Expand Up @@ -32,6 +32,7 @@
namespace OC\DB;

use Doctrine\DBAL\Exception;
use Doctrine\DBAL\Platforms\MySQLPlatform;
use Doctrine\DBAL\Schema\AbstractAsset;
use Doctrine\DBAL\Schema\Comparator;
use Doctrine\DBAL\Schema\Index;
Expand Down Expand Up @@ -238,14 +239,18 @@ protected function applySchema(Schema $targetSchema, \Doctrine\DBAL\Connection $

$schemaDiff = $this->getDiff($targetSchema, $connection);

$connection->beginTransaction();
if (!$connection->getDatabasePlatform() instanceof MySQLPlatform) {
$connection->beginTransaction();
}
$sqls = $schemaDiff->toSql($connection->getDatabasePlatform());
$step = 0;
foreach ($sqls as $sql) {
$this->emit($sql, $step++, count($sqls));
$connection->query($sql);
}
$connection->commit();
if (!$connection->getDatabasePlatform() instanceof MySQLPlatform) {
$connection->commit();
}
}

/**
Expand Down