fix: unknown variable column-statistics=0 with MariaDB 10

src/Services/DatabaseBackup/MysqlDatabaseBackup.php

@@ -75,7 +75,24 @@ public function backup(AbstractExecutor $executor): void
         $executor->getReferenceRepository()->save($this->getBackupFilePath());
         self::$metadata = $em->getMetadataFactory()->getLoadedMetadata();
 
-        exec("{$dbPass} mysqldump --host {$dbHost} {$port} --user {$dbUser} --no-create-info --skip-triggers --no-create-db --no-tablespaces --compact --column-statistics=0 {$dbName} > {$this->getBackupFilePath()}");
+        $mysqldumpOptions = '--no-create-info --skip-triggers --no-create-db --no-tablespaces --compact';
+        $mysqldumpCommand = 'mysqldump --host '.$dbHost.' '.$port.' --user '.$dbUser.' '.$dbName.' '.$mysqldumpOptions;
+        $columnStatistics0 = '--column-statistics=0';
+
+        // ignore the E_WARNING if “--column-statistics=0” is not a valid option
+        $execWithColumnStatistics = @exec(
+            $dbPass.' '.$mysqldumpCommand.' '.$columnStatistics0.' > '.$this->getBackupFilePath()
+        );
+
+        if (false !== $execWithColumnStatistics) {
+            return;
+        }
+
+        // when mysqldump is provided by MariaDB 10, “--column-statistics=0” is not a valid option,
+        // we call mysqldump without this option
+        exec(
+            $dbPass.' '.$mysqldumpCommand.' > '.$this->getBackupFilePath()
+        );
     }
 
     public function restore(AbstractExecutor $executor, array $excludedTables = []): void