Fix handling of namespace nodes in xpath() (xml)
xpath() attempted to call xmlCopyNode() and xmlNodeDump() on a
XML_NAMESPACE_DECL, finishing with a confusing error:
=# SELECT xpath('//namespace::foo', '<root xmlns:foo="http://127.0.0.1"/>');
ERROR: 53200: could not copy node
CONTEXT: SQL function "xpath" statement 1
xpath() is changed so as it goes through xmlXPathCastNodeToString()
instead, that is able to handle namespace nodes. xml2 uses the same
solution. This issue has been discovered while digging into
9d33a5a804db.
Author: Michael Paquier <[email protected]>
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 14
Branch
------
REL_15_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/1d8c72b2eff61202f3b35c0c130a52231cb3590a
Modified Files
--------------
src/backend/utils/adt/xml.c | 4 +++-
src/test/regress/expected/xml.out | 6 ++++++
src/test/regress/expected/xml_1.out | 5 +++++
src/test/regress/sql/xml.sql | 1 +
4 files changed, 15 insertions(+), 1 deletion(-)
