CURR_PRICE MONEY; BEGIN REMARK — Throw out bids
CURR_PRICE MONEY; BEGIN REMARK — Throw out bids that are incorrectly passed in IF LISTING# IS NULL OR BID IS NULL OR BID <= 0 THEN RETURN FALSE; REMARK -- bidding price (including proxy bids) must exceed starting price REMARK -- if current price is NULL, otherwise must exceed current price SELECT STARTING_PRICE, CURRENT_PRICE INTO START_PRICE, CURR_PRICE FROM LISTING WHERE LISTING# = LISTNUM; IF CURR_PRICE IS NULL THEN IF BID <= START_PRICE THEN RETURN FALSE; ELSE IF BID <= CURR_PRICE THEN RETURN FALSE; END IF; RETURN TRUE; END; The preceding script applies to both normal (regular) bids and to proxy bids as well. Aproxy bid must always be greater than the current bid price; otherwise, the proxy bid is just a normal bid. Aproxy bid is where a buyer sets a maximum price that they will bid to. Whenever other bidders place bids, the system automatically increments the highest bid price with the current increment, until the proxy bid is reached. If the competing bidder exceeds the proxy bid, the other buyer becomes the current highest bidder. Encoding Business Rules for the Data Warehouse Database Model In short, there is nothing that you would want to attach to a data warehouse database model in the form of database model embedded coding, acting on the database model structures. It would simply be contrary to the existence of a data warehouse. Try It Out Field Level Business Rules for an OLTP Database Model Figure 12-8 shows an ERD for the musicians OLTP database model. Here s a basic approach to business rules field settings: 1. Individual field business rules (including defaults, CHECK constraints, display formats, and input masks) 2. Encoding business rules using some kind of stored database coding, if and where appropriate (usually CHECK constraint functions) 374 Chapter 12
We recommend high quality webhost to host and run your jsp application: christian web host services.