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1. The full-text search feature automatically removes words that are shorter than a specified length. You need to tell the visitor which words have been removed when doing searches. First, find out which words are removed with the FlagStopWords method. This method receives as parameter an array of words and returns two arrays, one for the stop-words, and the other for the accepted words. Add this method to your Catalog class, located in business/catalog.php: // Flags stop words in search query public static function FlagStopWords($words) { // Build SQL query $sql = 'SELECT * FROM catalog_flag_stop_words(:words);'; // Build the parameters array $params = array (':words' => '{' . implode(', ', $words) . '}'); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query $flags = DatabaseHandler::GetAll($result, $params); $search_words = array ('accepted_words' => array (), 'ignored_words' => array ()); for ($i = 0; $i < count($flags); $i++) if ($flags[$i]['catalog_flag_stop_words']) $search_words['ignored_words'][] = $words[$i]; else $search_words['accepted_words'][] = $words[$i]; return $search_words; } 2. Finally, add the Search method to your Catalog class: // Search the catalog public static function Search($searchString, $allWords, $pageNo, &$rHowManyPages) { // The search results will be an array of this form $search_result = array ('accepted_words' => array (), 'ignored_words' => array (),

SQL> @is_profiler DBMS_PROFILER Version 2.0 DBMS_PROFILER.internal_version_check = 0 You have access to locally defined profiler tables for your current username: BPS PL/SQL procedure successfully completed. Given that you have access to the profiler, profile your relational version of the debug logger by following these steps: 1. Profile your debug logger by executing the following at the SQL*Plus prompt: SQL> @run_profiler.sql debug_ts.sql This profiles your debug logging table package by executing your test unit for said package. The run_profiler.sql script should have displayed the run number on the screen. Jot down this number, because you ll need it to run the two profiling reports next. 2. Create an average percent consumption report by executing the following at the SQL*Plus prompt: SQL> @avg_profile.sql <run_number> where <run_number> is the run number you got from executing script run_profiler.sql. 3. Examine the file avg_profile_<run_number>.txt. Ask yourself, What s the biggest consumer of resources

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4. Create an order by program unit and line number report by executing the following at the SQL*Plus prompt: SQL> @ord_profile.sql <run_number> 5. Examine the file ord_profile_<run_number>.txt. Scan down the report. Find where your methods start and stop. Add up the average time consumption in nanoseconds. Ask yourself, What s the biggest consumer of resources Interestingly enough, in both cases, when you ask yourself to identify the biggest consumer of resources, you ll see that the answer is your SQL statements. Yes, we re back to dealing with SQL again. It s important to verify that your PL/SQL program logic is sound and it performs well, but it s even more important to make sure that your SQL is efficient. So let s see how you can determine just what s going on in a SQL statement next.

'products' => array ()); // Return void result if the search string is void if (empty ($searchString)) return $search_result; // Search string delimiters $delimiters = ',.; '; // Use strtok to get the first word of the search string $word = strtok($searchString, $delimiters); $words = array (); // Build words array while ($word) { $words[] = $word; // Get the next word of the search string $word = strtok($delimiters); } // Split the search words in two categories: accepted and ignored $search_words = Catalog::FlagStopWords($words); $search_result['accepted_words'] = $search_words['accepted_words']; $search_result['ignored_words'] = $search_words['ignored_words']; // Return void result if all words are stop words if (count($search_result['accepted_words']) == 0) return $search_result; // Count the number of search results $sql = 'SELECT catalog_count_search_result(:words, :all_words);'; $params = array ( ':words' => '{' . implode(', ', $search_result['accepted_words']) . '}', ':all_words' => $allWords); // Calculate the number of pages required to display the products $rHowManyPages = Catalog::HowManyPages($sql, $params); // Calculate the start item $start_item = ($pageNo - 1) * PRODUCTS_PER_PAGE; // Retrieve the list of matching products $sql = 'SELECT * FROM catalog_search(:words, :all_words, :short_product_description_length, :products_per_page, :start_page);'; $params = array (

You can concatenate fields without using the CONCATENATE function by building the formula yourself. Tip For example, to combine [FirstName] and [LastName] into a [FullName] column displaying Last name, First name, you can create the following formula:

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':words' => '{' . implode(', ', $search_result['accepted_words']) . '}', ':all_words' => $allWords, ':short_product_description_length' => SHORT_PRODUCT_DESCRIPTION_LENGTH, ':products_per_page' => PRODUCTS_PER_PAGE, ':start_page' => $start_item); // Prepare and execute the query, and return the results $result = DatabaseHandler::Prepare($sql); $search_result['products'] = DatabaseHandler::GetAll($result, $params); return $search_result; }

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