Thread

Re: [PoC] XMLCast (SQL/XML X025)

Marcos Pegoraro <marcos@f10.com.br> — 2025-11-29T19:39:18Z

Em sáb., 29 de nov. de 2025 às 09:38, Jim Jones <jim.jones@uni-muenster.de>
escreveu:

> Perhaps listing the data types would make things easier to understand?
> Something like:
>
> * Casting is supported between xml and the built-in character
> (character, character varying, or text), numeric, boolean, binary, and
> date/time types. The date/time types (date, time with time zone,
> timestamp with time zone, and interval) are converted to their
> corresponding XML Schema types: xs:date, xs:time, xs:dateTime, and
> xs:duration.
>

If we link to them, then the user will not have any doubts of what
datatypes we work

+          It supports casting between <type>xml</type> and <link
linkend="datatype-character-table">character</link>, <link
linkend="datatype-numeric">numeric</link>, <link
linkend="datatype-datetime">date/time</link>, <link
linkend="datatype-boolean">boolean</link> and <link
linkend="datatype-binary">binary</link> data types.


>
> If the user gets a "ERROR:  unsupported target data type for XMLCast"
> using a domain (being an alias for a base type or not) and the
> documentation clearly lists the supported types, wouldn't that be
> enough? If not, do you have anything in mind that we could add to the docs?


I think being explicit in the previous paragraph then is fine to not
mention domains.

regards
Marcos