'filter_name' => array(
	'OR' => array(
		'upper(Music.name)' => array(
		    
			// 'like', 'not like', 'like begin', 'like end', '=', '!=', '>', '<', '>=','<='
			'operator' => 'like', 
			'fieldModel' => 'xyz',
			'value.before' => true,
			'value.after' => true,
			'value.upper' => true,
			
			// 'NOT', 'AND', 'OR'
			'explode.concatenate' => 'AND', 
			
			//' ', ',', '-'
			'explode.character' => ' ', 
		),
	)
),

Ex:

'filter_ex1' => array(	
	'Music.name' => array(
		'operator' => 'like',
		'value.upper' => true,		
	),
),
'filter_ex2' => array(
	'OR' => array(
		'upper(Music.name)' => array(
			'operator' => 'like begin',
			'value.upper' => true,
		),
	)
),