XQuery/XPath 2.0+ support

Garfield Lewis <garfield.lewis@lzlabs.com> writes:

I am investigating whether there are any plans to have XPath 2.0 support for Postgres XML natively or are there any available extension packages that includes this support?

I don't know of anyone actively working on that. The difficulty is
that we don't especially want to write/maintain such logic ourselves,
but there don't seem to be any suitable libraries available that
(a) can be called from C and (b) have a compatible license.

regards, tom lane

Thx, Tom...

But isn't the libxml2 library not sufficient for this purpose? Note that I have not tried it yet, I am still just investigating possible solutions.

--
Regards,
Garfield A. Lewis

On 2021-11-29, 12:08 PM, "Tom Lane" <tgl@sss.pgh.pa.us> wrote:

Garfield Lewis <garfield.lewis@lzlabs.com> writes:

I am investigating whether there are any plans to have XPath 2.0 support for Postgres XML natively or are there any available extension packages that includes this support?

I don't know of anyone actively working on that. The difficulty is
that we don't especially want to write/maintain such logic ourselves,
but there don't seem to be any suitable libraries available that
(a) can be called from C and (b) have a compatible license.

regards, tom lane

Hi

st 1. 12. 2021 v 6:28 odesílatel Garfield Lewis <garfield.lewis@lzlabs.com>
napsal:

Thx, Tom...

But isn't the libxml2 library not sufficient for this purpose? Note that I
have not tried it yet, I am still just investigating possible solutions.

Unfortunately, no, or it is not about Postgres. The development of libxml2
is frozen :-/ and there are only bugfix releases. What I know, there are
only some experimental enhancements, but nobody has finalized it.

https://stackoverflow.com/questions/6586896/does-libxml2-support-xpath-2-0-or-not

XPath 2.0 is much more complex than XPath - it is a new language.

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https://en.wikipedia.org/wiki/Posting_style#Top-posting

Regards

Pavel