Api gives error when using 'LIKE' with pseudoconstant fields

To replicate

Create custom field (used for contact) of html type (basically those which register field option on Option value table)- checkbox/select/radio - any data type. Say Select field with options
custom_15 => ('option 1'=> 'a', 'option 2' => 'b');
2. On using advance filter array(LIKE => '%a%') it throw fatal error
"error_message": "'%a%' is not a valid option for field custom_15"

Comment by Monish:
So we need to extend _civicrm_api3_api_match_pseudoconstant() to support special character '%' on using 'LIKE' operator

Response by Eileen
@monishdeb - the minimum form of support would be to trim from the start & finish. But, are we trying to support

array('custom_10' => array('LIKE' => '%dakota%'));

for when people really do want to find north & south dakota or

array('LIKE' => '%big%house%'));

to find 'big house', 'my big house', 'my bigger house'

etc.

If we want to support the variants I'm not sure if that adds a security consideration.