Re: Adding IEEE 754:2008 decimal floating point and hardware support for it

Поиск
Список
Период
Сортировка
От Thomas Munro
Тема Re: Adding IEEE 754:2008 decimal floating point and hardware support for it
Дата
Msg-id CADLWmXXizVdi6K4REx98qHfkAPLWbd8KnUohmcSQY4nBLgMhMQ@mail.gmail.com
обсуждение исходный текст
Ответ на Adding IEEE 754:2008 decimal floating point and hardware support for it  (Craig Ringer <craig@2ndquadrant.com>)
Список pgsql-hackers
<div dir="ltr">On 12 June 2013 00:56, Craig Ringer <span dir="ltr"><<a href="mailto:craig@2ndquadrant.com"
target="_blank">craig@2ndquadrant.com</a>></span>wrote:<br /><div class="gmail_extra"><div
class="gmail_quote"><blockquoteclass="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div
bgcolor="#FFFFFF"text="#000000">The main thing I'm wondering is how/if to handle backward compatibility with the
existingNUMERIC and its DECIMAL alias, or whether adding new DECIMAL32, DECIMAL64, and DECIMAL128 types would be more
appropriate.I'd love to just use the SQL standard types name DECIMAL if possible, and the standard would allow for it
(seebelow), but backward compat would be a challenge, as would coming up with a sensible transparent promotion scheme
from32->64->128->numeric and ways to stop undesired promotion.<br /></div></blockquote><div style="style"><br
/>Forwhat it's worth, DB2 9.5 and later call these types DECFLOAT(16) and DECFLOAT(34), and they are distinct from
DECIMAL/NUMERIC. <br /><br /><a
href="http://www.ibm.com/developerworks/data/library/techarticle/dm-0801chainani/">http://www.ibm.com/developerworks/data/library/techarticle/dm-0801chainani/</a><br
/></div></div></div></div>

В списке pgsql-hackers по дате отправления:

Предыдущее
От: Yeb Havinga
Дата:
Сообщение: Re: Parallell Optimizer
Следующее
От: Fabien COELHO
Дата:
Сообщение: Re: [PATCH] pgbench --throttle (submission 7 - with lag measurement)