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   1 /**
   2  * Implements hook_field_storage_delete_field().
   3  */
   4 function {{ machine_name }}_field_storage_delete_field($field) {
   5   // Mark all data associated with the field for deletion.
   6   $field['deleted'] = 0;
   7   $table = _field_sql_storage_tablename($field);
   8   $revision_table = _field_sql_storage_revision_tablename($field);
   9   db_update($table)
  10     ->fields(array('deleted' => 1))
  11     ->execute();
  12
  13   // Move the table to a unique name while the table contents are being deleted.
  14   $field['deleted'] = 1;
  15   $new_table = _field_sql_storage_tablename($field);
  16   $revision_new_table = _field_sql_storage_revision_tablename($field);
  17   db_rename_table($table, $new_table);
  18   db_rename_table($revision_table, $revision_new_table);
  19   drupal_get_schema(NULL, TRUE);
  20 }