Issue #3280572 by Fabianx: Increase MAX LENGTH limit for Oracle 12.2

Connection.php

@@ -36,14 +36,14 @@ define('ORACLE_BLOB_PREFIX', 'B^#');
  *
  * Affects schema.inc table creation.
  */
-define('ORACLE_MAX_VARCHAR2_LENGTH', 1332);
+define('ORACLE_MAX_VARCHAR2_LENGTH', 4000);
 
 /**
  * Maximum length of a string that PDO_OCI can handle.
  *
  * Affects runtime blob creation.
  */
-define('ORACLE_MIN_PDO_BIND_LENGTH', 1332);
+define('ORACLE_MIN_PDO_BIND_LENGTH', 4000);
 
 /**
  * Alias used for queryRange filtering (we have to remove that from resultsets).