diff -U3 /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_queries.out /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_queries.out
--- /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_queries.out	2024-03-19 13:35:14.032937000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_queries.out	2024-03-19 13:52:47.768397000 +0000
@@ -84,6 +84,7 @@
 ERROR:  column name/value list contains nonexistent column name "cow"
 -- test compound return
 select * from tcl_test_cube_squared(5);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  squared | cubed 
 ---------+-------
       25 |   125
@@ -91,6 +92,7 @@
 
 -- test SRF
 select * from tcl_test_squared_rows(0,5);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  x | y  
 ---+----
  0 |  0
@@ -101,6 +103,7 @@
 (5 rows)
 
 select * from tcl_test_sequence(0,5) as a;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
  a 
 ---
  0
@@ -144,6 +147,7 @@
 (1 row)
 
 select * from tcl_composite_result(1002);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
     tkey    | ref1 |         ref2         
 ------------+------+----------------------
  tkey1      | 1002 | ref22               
@@ -159,12 +163,14 @@
 (1 row)
 
 select * from tcl_dcomposite_result(1002);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
     tkey    | ref1 |         ref2         
 ------------+------+----------------------
  tkey2      | 1002 | ref42               
 (1 row)
 
 select * from tcl_dcomposite_result(-1);  -- fail
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  value for domain d_comp1 violates check constraint "d_comp1_check"
 create function tcl_record_result(int) returns record as $$
 return [list q1 sometext q2 $1 q3 moretext]
@@ -174,18 +180,21 @@
 select * from tcl_record_result(42);  -- fail
 ERROR:  a column definition list is required for functions returning "record" at character 15
 select * from tcl_record_result(42) as (q1 text, q2 int, q3 text);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
     q1    | q2 |    q3    
 ----------+----+----------
  sometext | 42 | moretext
 (1 row)
 
 select * from tcl_record_result(42) as (q1 text, q2 int, q3 text, q4 int);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
     q1    | q2 |    q3    | q4 
 ----------+----+----------+----
  sometext | 42 | moretext |   
 (1 row)
 
 select * from tcl_record_result(42) as (q1 text, q2 int, q4 int);  -- fail
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 ERROR:  column name/value list contains nonexistent column name "q3"
 -- test quote
 select tcl_eval('quote foo bar');
@@ -314,6 +323,7 @@
 ERROR:  forced error
 -- test loop control in spi_exec[p]
 select tcl_spi_exec(true, 'break');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: break
@@ -324,6 +334,7 @@
 (1 row)
 
 select tcl_spi_exec(true, 'continue');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: continue
@@ -335,11 +346,13 @@
 (1 row)
 
 select tcl_spi_exec(true, 'error');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: error
 ERROR:  error message
 select tcl_spi_exec(true, 'return');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: return
@@ -349,6 +362,7 @@
 (1 row)
 
 select tcl_spi_exec(false, 'break');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: break
@@ -359,6 +373,7 @@
 (1 row)
 
 select tcl_spi_exec(false, 'continue');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: continue
@@ -370,11 +385,13 @@
 (1 row)
 
 select tcl_spi_exec(false, 'error');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: error
 ERROR:  error message
 select tcl_spi_exec(false, 'return');
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  col1 1, col2 foo
 NOTICE:  col1 2, col2 bar
 NOTICE:  action: return
diff -U3 /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_trigger.out /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_trigger.out
--- /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_trigger.out	2024-03-19 13:35:14.033012000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_trigger.out	2024-03-19 13:52:47.847490000 +0000
@@ -723,6 +723,7 @@
 NOTICE:  TG_when: {INSTEAD OF}
 NOTICE:  args: {24 {skidoo view}}
 update trigger_test_view set v = 'update' where i=1;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  NEW: {i: 1, v: update}
 NOTICE:  OLD: {i: 1, v: insert}
 NOTICE:  TG_level: ROW
@@ -735,6 +736,7 @@
 NOTICE:  TG_when: {INSTEAD OF}
 NOTICE:  args: {24 {skidoo view}}
 delete from trigger_test_view;
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 NOTICE:  NEW: {}
 NOTICE:  OLD: {i: 1, v: insert}
 NOTICE:  TG_level: ROW
@@ -864,7 +866,9 @@
   REFERENCING OLD TABLE AS old_table NEW TABLE AS new_table
   FOR EACH STATEMENT EXECUTE PROCEDURE transition_table_test_f();
 update transition_table_test set name = 'b';
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 INFO:  old: 1 -> a
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 INFO:  new: 1 -> b
 drop table transition_table_test;
 drop function transition_table_test_f();
diff -U3 /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_transaction.out /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_transaction.out
--- /tmp/cirrus-ci-build/src/pl/tcl/expected/pltcl_transaction.out	2024-03-19 13:35:14.032991000 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pltcl/regress/results/pltcl_transaction.out	2024-03-19 13:52:47.961129000 +0000
@@ -63,6 +63,7 @@
 -- commit inside cursor loop
 CREATE TABLE test2 (x int);
 INSERT INTO test2 VALUES (0), (1), (2), (3), (4);
+WARNING:  outfuncs/readfuncs failed to produce an equal rewritten parse tree
 TRUNCATE test1;
 CREATE PROCEDURE transaction_test4a()
 LANGUAGE pltcl