| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and a system for efficiently using a database technique for notice, especially, for subscription. SOLUTION: Concerning this method for efficiently utilizing an active database technique and an expandable database technique, namely, trigger and user defining functions generally for processing subscription, in a first style, all the subscription on a specified table or generally plural tables is merged to this table or one trigger on these tables. Thus, the efficiency of a trigger base is dramatically improved. In a second style, information registered by a subscriber is directly distributed from the address space of a database system through a suitable user defining function. This is the other basis of efficiency improvement.</p> |
