Added backticks to table names in mysql schema reader. Otherwise indexes cannot be added to tables whose name coïncide with reserved mysql words (e.g. order).

Author: Vincent Hornikx

lib/internal/Magento/Framework/Setup/Declaration/Schema/Db/MySQL/DbSchemaReader.php

@@ -126,7 +126,7 @@ public function readIndexes($tableName, $resource)
         $indexes = [];
         $adapter = $this->resourceConnection->getConnection($resource);
         $condition = sprintf('`Non_unique` = 1');
-        $sql = sprintf('SHOW INDEXES FROM %s WHERE %s', $tableName, $condition);
+        $sql = sprintf('SHOW INDEXES FROM `%s` WHERE %s', $tableName, $condition);
         $stmt = $adapter->query($sql);
 
         // Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection
@@ -170,7 +170,7 @@ public function readReferences($tableName, $resource)
     public function getCreateTableSql($tableName, $resource)
     {
         $adapter = $this->resourceConnection->getConnection($resource);
-        $sql = sprintf('SHOW CREATE TABLE %s', $tableName);
+        $sql = sprintf('SHOW CREATE TABLE `%s`', $tableName);
         $stmt = $adapter->query($sql);
         return $stmt->fetch(\Zend_Db::FETCH_ASSOC);
     }
@@ -186,7 +186,7 @@ public function readConstraints($tableName, $resource)
         $constraints = [];
         $adapter = $this->resourceConnection->getConnection($resource);
         $condition = sprintf('`Non_unique` = 0');
-        $sql = sprintf('SHOW INDEXES FROM %s WHERE %s', $tableName, $condition);
+        $sql = sprintf('SHOW INDEXES FROM `%s` WHERE %s', $tableName, $condition);
         $stmt = $adapter->query($sql);
 
         // Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection