constant REQUIRED_D7_SCHEMA_VERSION

Minimum schema version of Drupal 7 required for upgrade to Drupal 8.

Upgrades from Drupal 7 to Drupal 8 require that Drupal 7 be running the most recent version, or the upgrade could fail. We can't easily check the Drupal 7 version once the update process has begun, so instead we check the schema version of system.module.

1 use of REQUIRED_D7_SCHEMA_VERSION
update_prepare_d8_bootstrap in drupal/core/includes/update.inc
Performs extra steps required to bootstrap when using a Drupal 7 database.

File

drupal/core/includes/update.inc, line 25
Drupal database update API.

Code

const REQUIRED_D7_SCHEMA_VERSION = '7069';