On 23 Jun 2016 1:41 am, "Sergei Golubchik" <[email protected]> wrote: > > Hi, Jesse! > > It is based on the popular dtoa.c by David M. Gay. > The original source code is here: http://www.netlib.org/fp/dtoa.c > The math is explained here: http://ampl.com/REFS/rounding.pdf >
Thanks Sergei, >From what I can tell that library is focused on extracting the decimal digits from a double. I actually managed to do that part (in a slightly hackish way) using PHP's sprintf(), and the digits themselves do match. Where I'm stuck is how MariaDB decides between scientific and regular decimal notation. The number of significant digits, their position relative to the decimal point, and the target column length all seem to play a part, but I can't deduce exactly how. > Regards, > Sergei > Chief Architect MariaDB > and [email protected]
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