diff --strip-trailing-cr -U3 C:/cirrus/src/test/regress/expected/hot_updates.out C:/cirrus/build/testrun/pg_upgrade/002_pg_upgrade/data/results/hot_updates.out
--- C:/cirrus/src/test/regress/expected/hot_updates.out	2026-03-23 19:26:03.710277100 +0000
+++ C:/cirrus/build/testrun/pg_upgrade/002_pg_upgrade/data/results/hot_updates.out	2026-03-23 19:32:12.712066900 +0000
@@ -640,7 +640,10 @@
 INSERT INTO hot_xml_test VALUES
     (1, '<person><name>Alice</name><age>30</age></person>'),
     (2, '<person><name>Bob</name><age>25</age></person>');
-ERROR:  could not identify a comparison function for type xml
+ERROR:  unsupported XML feature
+LINE 2:     (1, '<person><name>Alice</name><age>30</age></person>'),
+                ^
+DETAIL:  This functionality requires the server to be built with libxml support.
 SELECT * FROM get_hot_count('hot_xml_test');
  updates | hot 
 ---------+-----
@@ -650,6 +653,10 @@
 -- Update non-indexed XPath (age) - behavior depends on XML comparison fallback
 -- Full XML value replacement means non-indexed path updates still require index comparison
 UPDATE hot_xml_test SET doc = '<person><name>Alice</name><age>31</age></person>' WHERE id = 1;
+ERROR:  unsupported XML feature
+LINE 1: UPDATE hot_xml_test SET doc = '<person><name>Alice</name><ag...
+                                      ^
+DETAIL:  This functionality requires the server to be built with libxml support.
 SELECT * FROM get_hot_count('hot_xml_test');
  updates | hot 
 ---------+-----
@@ -658,6 +665,10 @@
 
 -- Update indexed XPath (name) - should NOT be HOT
 UPDATE hot_xml_test SET doc = '<person><name>Alice2</name><age>31</age></person>' WHERE id = 1;
+ERROR:  unsupported XML feature
+LINE 1: UPDATE hot_xml_test SET doc = '<person><name>Alice2</name><a...
+                                      ^
+DETAIL:  This functionality requires the server to be built with libxml support.
 SELECT * FROM get_hot_count('hot_xml_test');
  updates | hot 
 ---------+-----