show가 왜이 rebol listview를 새로 고치지 않습니까?

Question

목록 표시에서 mysql의 스팸 목록을 표시합니다. 삭제 후에 show grid를 사용하지만 새로 고침하지 않습니다. 이유는 무엇입니까?

do http://reboltutorial.com/source/mysql-protocol.r 
do http://www.hmkdesign.dk/rebol/list-view/list-view.r 

window: layout [ 
    grid: list-view 500x400 with [ 
    data-columns: ["ID" "Author" "comment_author_IP"] 
    viewed-columns: ["ID" "Author" "comment_author_IP"] 
    data: read/custom mysql://johndoe:123@72.64.23.123/wordpress_db [ 
     "SELECT DISTINCT COMMENT_ID, comment_author,comment_author_IP from wp_1_comments WHERE comment_approved='spam'" 
    ] 
    ] 
    Button 200x30 "Delete all spams" [ 
     read/custom mysql://johndoe:123@72.64.23.123/wordpress_db [ 
     "DELETE FROM wp_1_comments WHERE comment_approved='spam'" 
    ] 
    Print "Spams deleted." 
    show grid ;SHOULD refresh the grid BUT DOESN'T 
    ] 
] 
view/title window "All Rebol Tutorial's Spams" 

Answer 1

http://www.hmkdesign.dk/rebol/list-view/docs/list-view.html#section-13

내가 시도했지만하거나 새로 고침하지 않는 것