On Fri, Feb 29, 2008 at 02:53:05PM +0530, Gurjeet Singh wrote: > In my opinion (without looking at the code), if you have a grouping-function > or ORDER BY or GROUP BY clause, then yes, the whole query has to be executed > to show the first row of the result-set. But if the query doesn't have any > of these clauses, then the DB has the ability to send back the first row > from the result as soon as it processes it (i.e after WHERE clause > processing), and stop the query execution there. Except if you have an index on the column you're ordering by. Then the server can really return the first row quickly. Have a nice day, -- Martijn van Oosterhout <kleptog@xxxxxxxxx> http://svana.org/kleptog/ > Those who make peaceful revolution impossible will make violent revolution inevitable. > -- John F Kennedy
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