Re: JSON / ASP.NET AJAX Dates support in PostgreSQL

On 2023-04-13 10:07:09 -0500, Ron wrote:
> On 4/13/23 09:44, Sebastien Flaesch wrote:
> Is there an easy way to convert JSON data containing ASP.NET AJAX Dates
> into PostgreSQL timestamp?
>
> I have this kind of JSON data:
>
> {
>     "PurchaseOrder" : "4500000000",
>     "CreationDate" : "\/Date(1672358400000)\/",
>     "LastChangeDateTime" : "\/Date(1672692813062+0100)\/"
> }
>
> Warning: Note the backslash before the slashes!

That's a Noop. According to RFC 8259, "\/" is the same as "/" (no idea
why they even specified that - it seems quite pointless).

> According to JSON spec this is valid JSON and used by AJAX Date format.

It's valid JSON, but for JSON it's just a string, not a date.

Any interpretation is strictly by convention between the sender and the
receiver.

> This looks like "milliseconds since the Unix epoch:
>
> $ date -d @1672692813.062
> Mon 02 Jan 2023 02:53:33 PM CST
>
> Thus:
> select to_timestamp(cast(1672692813062 as bigint))::timestamp;

ITYM:

select to_timestamp(1672692813062/1000.0);

hp

--
_ | Peter J. Holzer | Story must make more sense than reality.
|_|_) | |
| | | hjp(at)hjp(dot)at | -- Charles Stross, "Creative writing
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