1，form是基于單表視圖建立的，沒有寫on-insert此類的觸發器。在視圖上加了個rownum列結果導致form上的列不能更新
? ? ?據說此種情形下的form會判斷視圖上的列是否屬于基表，不屬于的話會導致整個塊不能更新。
2，在form界面上顯示行號
? ? ?在post-query里使用:system.trigger_record;? ??
? ?SYSTEM.CURSOR_RECORD和:system.trigger_record的區別：
? ?SYSTEM.CURSOR_RECORD represents the number of the record where the cursor is located.
??This number represents the record's current physical order in the block's list of records.
??The value is always a character string. ? ?
??SYSTEM.TRIGGER_RECORD represents the number of the record that Form Builder is processing.??
??This number represents the record's current physical order in the block's list of records.
??The value is always a character string.
