number.install

<?php
/**
 * @file
 * Install, update and uninstall functions for the number module.
 */

/**
 * Implements hook_field_schema().
 */
function number_field_schema($field) {
  switch ($field['type']) {
    case 'number_integer' :
      $columns = array(
        'value' => array(
          'type' => 'int',
          'not null' => FALSE
        ),
      );
      break;

    case 'number_float' :
      $columns = array(
        'value' => array(
          'type' => 'float',
          'not null' => FALSE
        ),
      );
      break;

    case 'number_decimal' :
      $columns = array(
        'value' => array(
          'type' => 'numeric',
          'precision' => $field['settings']['precision'],
          'scale' => $field['settings']['scale'],
          'not null' => FALSE
        ),
      );
      break;
  }
  return array(
    'columns' => $columns,
  );
}