constant REQUIRED_D6_SCHEMA_VERSION
Minimum schema version of Drupal 6 required for upgrade to Drupal 7.
Upgrades from Drupal 6 to Drupal 7 require that Drupal 6 be running the most recent version, or the upgrade could fail. We can't easily check the Drupal 6 version once the update process has begun, so instead we check the schema version of system.module in the system table.
1 use of REQUIRED_D6_SCHEMA_VERSION
- update_prepare_d7_bootstrap in drupal-7.x/
includes/ update.inc - Performs extra steps required to bootstrap when using a Drupal 6 database.
File
- drupal-7.x/
includes/ update.inc, line 19 - Drupal database update API.
Code
define('REQUIRED_D6_SCHEMA_VERSION', '6055')