hook_views_data and DECIMAL columns I have an external database that I am wiring into views with hook_views_data().  This particular database is making use of DECIMAL data type.  What are the proper field, filter, etc, handlers to use with this?
The 'numeric' type classes handle both integers and floats/decimals:

Field handler: views_handler_field_numeric
Filter handler: views_handler_filter_numeric
Argument handler: views_handler_argument_numeric
Validation plugin: views_plugin_argument_validate_numeric

It's not that obvious at face value, but if you look at the comments for views_handler_field_numeric:

Definition terms:

float: If true this field contains a decimal value. If unset this field will be assumed to be integer.


So setting 'float' =&gt; TRUE on your field definition, and using the numeric handlers, is all you need to do. e.g
$data['some_table']['msrp'] = array(
  'title' =&gt; t('MSRP'),
  'help' =&gt; t('MSRP of the product.'),
  'field' =&gt; array(
    'handler' =&gt; 'views_handler_field_numeric',
    'click sortable' =&gt; TRUE,
    'float' =&gt; TRUE,
  ),
  'filter' =&gt; array(
    'handler' =&gt; 'views_handler_filter_numeric',
  ),
  'sort' =&gt; array(
    'handler' =&gt; 'views_handler_sort',
  ),
);