Merge pull request #5416 from kenjis/fix-MySQLi-Connection-_foreignKeyData

fix: `MySQLi\Connection::_foreignKeyData()` may return duplicated rows

Author: kenjis

system/Database/MySQLi/Connection.php

@@ -485,8 +485,10 @@ protected function _foreignKeyData(string $table): array
                     FROM information_schema.TABLE_CONSTRAINTS AS tc
                     INNER JOIN information_schema.REFERENTIAL_CONSTRAINTS AS rc
                         ON tc.CONSTRAINT_NAME = rc.CONSTRAINT_NAME
+                        AND tc.CONSTRAINT_SCHEMA = rc.CONSTRAINT_SCHEMA
                     INNER JOIN information_schema.KEY_COLUMN_USAGE AS kcu
                         ON tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
+                        AND tc.CONSTRAINT_SCHEMA = kcu.CONSTRAINT_SCHEMA
                     WHERE
                         tc.CONSTRAINT_TYPE = ' . $this->escape('FOREIGN KEY') . ' AND
                         tc.TABLE_SCHEMA = ' . $this->escape($this->database) . ' AND