Add XMLText function (SQL/XML X038)
This function implements the standard XMLTest function, which
converts text into xml text nodes. It uses the libxml2 function
xmlEncodeSpecialChars to escape predefined entities (&"<>), so
that those do not cause any conflict when concatenating the text
node output with existing xml documents.
This also adds a note in features.sgml about not supporting
XML(SEQUENCE). The SQL specification defines a RETURNING clause
to a set of XML functions, where RETURNING CONTENT or RETURNING
SEQUENCE can be defined. Since PostgreSQL doesn't support
XML(SEQUENCE) all of these functions operate with an
implicit RETURNING CONTENT.
Author: Jim Jones <jim.jones@uni-muenster.de>
Reviewed-by: Vik Fearing <vik@postgresfriends.org>
Discussion: https://postgr.es/m/86617a66-ec95-581f-8d54-08059cca8885@uni-muenster.de
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/526fe0d79914b2dfcfd79effd1ab26ff62469248
Modified Files
--------------
doc/src/sgml/features.sgml | 9 +++++++++
doc/src/sgml/func.sgml | 30 ++++++++++++++++++++++++++++++
src/backend/catalog/sql_features.txt | 2 +-
src/backend/utils/adt/xml.c | 22 ++++++++++++++++++++++
src/include/catalog/pg_proc.dat | 3 +++
src/test/regress/expected/xml.out | 36 ++++++++++++++++++++++++++++++++++++
src/test/regress/expected/xml_1.out | 23 +++++++++++++++++++++++
src/test/regress/expected/xml_2.out | 36 ++++++++++++++++++++++++++++++++++++
src/test/regress/sql/xml.sql | 7 +++++++
9 files changed, 167 insertions(+), 1 deletion(-)