Improve error logging on migration failure

Signed-off-by: John Molakvoæ <skjnldsv@protonmail.com>

Author: skjnldsv

lib/private/DB/MigrationService.php

@@ -27,7 +27,6 @@
  */
 namespace OC\DB;
 
-use Doctrine\DBAL\Exception\DriverException;
 use Doctrine\DBAL\Platforms\OraclePlatform;
 use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
 use Doctrine\DBAL\Schema\Index;
@@ -424,10 +423,10 @@ public function migrate($to = 'latest', $schemaOnly = false) {
 		foreach ($toBeExecuted as $version) {
 			try {
 				$this->executeStep($version, $schemaOnly);
-			} catch (DriverException $e) {
+			} catch (\Exception $e) {
 				// The exception itself does not contain the name of the migration,
 				// so we wrap it here, to make debugging easier.
-				throw new \Exception('Database error when running migration ' . $to . ' for app ' . $this->getApp(), 0, $e);
+				throw new \Exception('Database error when running migration ' . $version . ' for app ' . $this->getApp() . PHP_EOL. $e->getMessage(), 0, $e);
 			}
 		}
 	}
@@ -607,7 +606,6 @@ public function ensureOracleConstraints(Schema $sourceSchema, Schema $targetSche
 				// we will NOT detect invalid length if the column is not modified
 				if (($sourceColumn === null || $sourceColumn->getLength() !== $thing->getLength() || $sourceColumn->getType()->getName() !== Types::STRING)
 					&& $thing->getLength() > 4000 && $thing->getType()->getName() === Types::STRING) {
-						var_dump($sourceColumn === null, $sourceColumn->getLength(), $thing->getLength(),  $sourceColumn->getName());
 					throw new \InvalidArgumentException('Column "' . $table->getName() . '"."' . $thing->getName() . '" is type String, but exceeding the 4.000 length limit.');
 				}
 			}