Merge branch '5' into 6

src/ORM/Connect/MySQLDatabase.php

@@ -569,23 +569,21 @@ public function clearTable($table)
         // Not simply using "TRUNCATE TABLE \"$table\"" because DELETE is a lot quicker
         // than TRUNCATE which is very relevant during unit testing. Using TRUNCATE will lead to an
         // approximately 50% increase it the total time of running unit tests.
-        //
-        // Using max(ID) to determine if the table should reset its auto-increment, rather than using
-        // SELECT "AUTO_INCREMENT" FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?
-        // after deleting from the table, because in MySQL 8, under certain conditions, notably
-        // when running behat, sometimes the auto-increment was being reset to 2 for unknown reasons
-        $self = $this;
-        $fn = function () use ($self, $table) {
-            $maxID = $self->query("SELECT MAX(ID) FROM \"$table\"")->value();
-            $self->query("DELETE FROM \"$table\"");
-            if ($maxID > 0) {
-                $self->query("ALTER TABLE \"$table\" AUTO_INCREMENT = 1");
-            }
-        };
-        if ($this->supportsTransactions()) {
-            $this->withTransaction($fn);
-        } else {
-            $fn();
+        $this->query("DELETE FROM \"$table\"");
+
+        // Check if resetting the auto-increment is needed
+
+        // First run ANALYZE TABLE to reset table stats which are cached for 24 hours by
+        // default in MySQL 8
+        $this->query("ANALYZE TABLE \"$table\"");
+
+        $autoIncrement = $this->preparedQuery(
+            'SELECT "AUTO_INCREMENT" FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?',
+            [ $this->getSelectedDatabase(), $table]
+        )->value();
+
+        if ($autoIncrement > 1) {
+            $this->query("ALTER TABLE \"$table\" AUTO_INCREMENT = 1");
         }
     }
 }