question: static boolean compareNotNull ( Database database , Value l , Value r , int compareType ) { boolean result ; switch ( compareType ) { case EQUAL : case EQUAL_NULL_SAFE : result = database . areEqual ( l , r ) ; break ; case NOT_EQUAL : case NOT_EQUAL_NULL_SAFE : result = ! database . areEqual ( l , r ) ; break ; case BIGGER_EQUAL : result = database . compare ( l , r ) >= 0 ; break ; case BIGGER : result = database . compare ( l , r ) > 0 ; break ; case SMALLER_EQUAL : result = database . compare ( l , r ) <= 0 ; break ; case SMALLER : result = database . compare ( l , r ) < 0 ; break ; case SPATIAL_INTERSECTS : { ValueGeometry lg = ( ValueGeometry ) l . convertTo ( Value . GEOMETRY ) ; ValueGeometry rg = ( ValueGeometry ) r . convertTo ( Value . GEOMETRY ) ; result = lg . intersectsBoundingBox ( rg ) ; break ; } default : throw DbException . throwInternalError ( "type=" + compareType ) ; } return result ; }
target:  Compare two values, given the values are not NULL.