Comments on: Many needles in a haystack http://dom.as/2009/02/08/many-needles-in-a-haystack/ Sat, 17 Dec 2011 20:14:59 +0000 hourly 1 http://wordpress.com/ By: PaulM http://dom.as/2009/02/08/many-needles-in-a-haystack/#comment-1465 Sun, 15 Feb 2009 01:37:14 +0000 http://dammit.lt/?p=337#comment-1465 Nice article.
Scott’s reply at the end was funny.
But end of the day if this SQL is run over the life of this application how much time will be saved.
Short term the ROI is high, especially if the original question was just an exam question.
Long term, application running this over 3-5 years, your method is better.

My answer to the original question would have been a question (to understand the background). i.e. What’s this for?
Answer (a): Exam = use concat noting that normal b-tree indexes are not used when called with in a function.
Answer (b): Text pattern matching in an application… your method, maybe a text search engine, … etc.

Have Fun
Paul

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