Problem: xpath symbol conflict with postgres binary

Solution: rename the internal function name

extensions/omni_xml/CHANGELOG.md

@@ -0,0 +1,22 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres
+to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.1] - 2024-06-28
+
+### Fixed
+
+* Fixed `xpath` symbol conflict [#566]: [https://github.com/omnigres/omnigres/pull/566]
+
+## [0.1.0] - 2024-03-05
+
+Initial release following a few months of iterative development.
+
+[Unreleased]: https://github.com/omnigres/omnigres/commits/next/omni_httpd
+
+[0.1.0]: [https://github.com/omnigres/omnigres/pull/511]
+
+[0.1.1]: [https://github.com/omnigres/omnigres/pull/566]

extensions/omni_xml/migrate/1_xpath.sql

@@ -1,9 +1 @@
-create function xpath(document text, query text)
-    returns table
-            (
-                path text,
-                value text
-            )
-    language c
-as
-'MODULE_PATHNAME';
+/*{% include "../src/xpath.sql" %}*/

extensions/omni_xml/omni_xml.cc

@@ -84,6 +84,6 @@ extern "C" {
 
 void _PG_init() { init(); }
 
-PG_FUNCTION_INFO_V1(xpath);
-Datum xpath(PG_FUNCTION_ARGS) { return xpath_impl(fcinfo); }
+PG_FUNCTION_INFO_V1(xpath_fn);
+Datum xpath_fn(PG_FUNCTION_ARGS) { return xpath_impl(fcinfo); }
 }

extensions/omni_xml/src/xpath.sql

@@ -0,0 +1,10 @@
+create function xpath(document text, query text)
+    returns table
+            (
+                path  text,
+                value text
+            )
+    language c
+as
+'MODULE_PATHNAME',
+'xpath_fn';

versions.txt

@@ -18,4 +18,4 @@ omni_var=0.1.0
 omni_vfs_types_v1=0.1.0
 omni_vfs=0.1.1
 omni_web=0.1.0
-omni_xml=0.1.0
+omni_xml=0.1.1