performance-art.fr/sites/all/modules/gui/textauthor/textauthor.install

<?php


/**
 * Implements hook_field_schema().
 */
function textauthor_field_schema($field) {
  if($field['type'] == 'textauthor'){
    return array(
      'columns' => array(
        'value' => array(
          'type' => 'text',
          'size' => 'big',
          'not null' => FALSE,
        ),
        'author' => array(
          'type' => 'varchar',
          'length' => 255,
          'not null' => FALSE,
          'sortable' => TRUE
        ),
        'format' => array(
          'type' => 'varchar',
          'length' => 255,
          'not null' => FALSE,
        ),
      ),
      'indexes' => array(
        'format' => array('format'),
      ),
      'foreign keys' => array(
        'format' => array(
          'table' => 'filter_format',
          'columns' => array('format' => 'format'),
        ),
      ),
    );
  }
}