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| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2019-03-07 15:21:56 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2019-03-07 18:16:34 -0300 |
| commit | 251cf2e27bec98274e8bb002608680bdc211319e (patch) | |
| tree | f2d8a8f63e4fbe9ad2c11d60a20b109dca632878 /doc/src | |
| parent | 1d338584062b3e53b738f987ecb0d2b67745232a (diff) | |
| download | postgresql-251cf2e27bec98274e8bb002608680bdc211319e.tar.gz postgresql-251cf2e27bec98274e8bb002608680bdc211319e.zip | |
Fix minor deficiencies in XMLTABLE, xpath(), xmlexists()
Correctly process nodes of more types than previously. In some cases,
nodes were being ignored (nothing was output); in other cases, trying to
return them resulted in errors about unrecognized nodes. In yet other
cases, necessary escaping (of XML special characters) was not being
done. Fix all those (as far as the authors could find) and add
regression tests cases verifying the new behavior.
I (Álvaro) was of two minds about backpatching these changes. They do
seem bugfixes that would benefit most users of the affected functions;
but on the other hand it would change established behavior in minor
releases, so it seems prudent not to.
Authors: Pavel Stehule, Markus Winand, Chapman Flack
Discussion:
https://postgr.es/m/CAFj8pRA6J25CtAZ2TuRvxK3gat7-bBUYh0rfE2yM7Hj9GD14Dg@mail.gmail.com
https://postgr.es/m/8BDB0627-2105-4564-AA76-7849F028B96E@winand.at
The elephant in the room as pointed out by Chapman Flack, not fixed in
this commit, is that we still have XMLTABLE operating on XPath 1.0
instead of the standard-mandated XQuery (or even its subset XPath 2.0).
Fixing that is a major undertaking, however.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/func.sgml | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 7e14478db7d..03859a78eaa 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -11010,9 +11010,9 @@ $$ AS data; SELECT xmltable.* FROM xmlelements, XMLTABLE('/root' PASSING data COLUMNS element text); - element ----------------------- - Hello2a2 bbbCC + element +------------------------- + Hello2a2 bbbxxxCC ]]></screen> </para> |