function migrate_update_7206 in Migrate 7.2

Replace three-column PK with a simple serial.

File

./migrate.install, line 540

Migrate module installation

Code

function migrate_update_7206() {
  if (!db_field_exists('migrate_field_mapping', 'fmid')) {
    db_drop_primary_key('migrate_field_mapping');
    db_add_field('migrate_field_mapping', 'fmid', array(
      'type' => 'serial',
      'unsigned' => TRUE,
      'not null' => TRUE,
      'description' => 'Unique ID for the field mapping row',
    ), array(
      'primary key' => array(
        'fmid',
      ),
    ));
  }
}