Make xpath() do something useful with XPath expressions that return scalars.
Previously, xpath() simply returned an empty array if the expression did
not yield a node set. This is useless for expressions that return scalars,
such as one with name() at the top level. Arrange to return the scalar
value as a single-element xml array, instead. (String values will be
suitably escaped.)
This change will also cause xpath_exists() to return true, not false,
for such expressions.
Florian Pflug, reviewed by Radoslaw Smogura
Branch
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master
Details
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http://git.postgresql.org/pg/commitdiff/0ce7676aa03a2501fde949fea211ba5cd84c2ded
Modified Files
--------------
doc/src/sgml/func.sgml | 2 +
src/backend/utils/adt/xml.c | 114 ++++++++++++++++++++++++++++-------
src/test/regress/expected/xml.out | 48 +++++++++++++++
src/test/regress/expected/xml_1.out | 48 +++++++++++++++
src/test/regress/sql/xml.sql | 8 +++
5 files changed, 198 insertions(+), 22 deletions(-)
