On 19 December 2012 11:56, Friedrich Röhrs f.roehrs@mis.uni-saarland.de wrote:
I don't understand why 1.6e-8 is absolutly necessary for sorting and comparison. PHP allows for the definition of custom sorting functions. If a custom datatype is defined, a custom sorting/comparision function can be defined too. Or am i missing some performance points?
I believe for performance reasons in many cases sorting needs to be performed already by the database and supported by an index. -- gregor