Pavel Stehule wrote:
2010/5/19 Peter Eisentraut <pete...@gmx.net>:
On tis, 2010-05-18 at 18:26 -0400, Ben Hockey wrote:
ecmascript 5 is the most recent specification for JavaScript and i
would think that having a DATESTYLE format to simplify
interoperability with JavaScript applications would be highly
desirable.
Note that we haven't got any other datestyles that are intended to
support interoperability with some language. It is usually the job of
the client driver to convert PostgreSQL data (plural of datum) to the
appropriate type and format for the client environment or language. Is
there any reason why JavaScript would be different?
I wouldn't be keen to see dedicated language specific handling of
date/datetime formats. It would lead to an explosion of functions with
new languages needing adding as and when their users jumped up and down
on us. However a generic format could be very useful and would give the
opportunity for people who need a language specific short cut the
opportunity to do a CREATE FUNCTION wrapping the generic one with a hard
coded format specifier.
Other platforms have generic support for this kind of task, for example
SQLServer: http://msdn.microsoft.com/en-us/library/ms187928.aspx. I
wouldn't recommend the SQLServer way, I think numeric format specifiers
are clumsy. Perhaps a mechanism like Java which is nicely summarized
here:
http://java.sun.com/j2se/1.5.0/docs/api/java/text/SimpleDateFormat.html
Pavel: Why do you believe a generic format function would lead to SQL
injections attacks?
JavaScript isn't special language, but JSON is wide used format for
interoperability. And same is true for XML datestyle format.
Regards
Pavel
I think that the postgres handling of those data types should handle the
date encoding themselves. For example, a XMLELEMENT call that was passed
a date would format the date string to the xs:date format (e.g.
2010-05-19) and when passed a timestamp format to xs:datetime (e.g.
2010-05-19T09:29:52+01:00). I would see the JSON handling as being no
different.
Thanks,
--
Mike Fowler
Registered Linux user: 379787
"I could be a genius if I just put my mind to it, and I,
I could do anything, if only I could get 'round to it"
-PULP 'Glory Days'
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