diff --git a/src/test/regress/expected/arrays.out b/src/test/regress/expected/arrays.out
index 0ff54a18de..1c46da1e0b 100644
--- a/src/test/regress/expected/arrays.out
+++ b/src/test/regress/expected/arrays.out
@@ -2303,14 +2303,14 @@ insert into src
 create type textandtext as (c1 text, c2 text);
 create temp table dest (f1 textandtext[]);
 insert into dest select array[row(f1,f1)::textandtext] from src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
  length 
 --------
      32
 (1 row)
 
 delete from src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
  length 
 --------
      32
@@ -2318,7 +2318,7 @@ select length(md5((f1[1]).c2)) from dest;
 
 truncate table src;
 drop table src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
  length 
 --------
      32
diff --git a/src/test/regress/expected/brin.out b/src/test/regress/expected/brin.out
index 73fa38396e..b3aac15ecc 100644
--- a/src/test/regress/expected/brin.out
+++ b/src/test/regress/expected/brin.out
@@ -530,7 +530,7 @@ EXPLAIN (COSTS OFF) SELECT * FROM brin_test WHERE b = 1;
 CREATE TABLE brintest_3 (a text, b text, c text, d text);
 -- long random strings (~2000 chars each, so ~6kB for min/max on two
 -- columns) to trigger toasting
-WITH rand_value AS (SELECT string_agg(md5(i::text),'') AS val FROM generate_series(1,60) s(i))
+WITH rand_value AS (SELECT string_agg(notmd5(i::text),'') AS val FROM generate_series(1,60) s(i))
 INSERT INTO brintest_3
 SELECT val, val, val, val FROM rand_value;
 CREATE INDEX brin_test_toast_idx ON brintest_3 USING brin (b, c);
@@ -545,7 +545,7 @@ VACUUM brintest_3;
 -- retry insert with a different random-looking (but deterministic) value
 -- the value is different, and so should replace either min or max in the
 -- brin summary
-WITH rand_value AS (SELECT string_agg(md5((-i)::text),'') AS val FROM generate_series(1,60) s(i))
+WITH rand_value AS (SELECT string_agg(notmd5((-i)::text),'') AS val FROM generate_series(1,60) s(i))
 INSERT INTO brintest_3
 SELECT val, val, val, val FROM rand_value;
 -- now try some queries, accessing the brin index
diff --git a/src/test/regress/expected/brin_multi.out b/src/test/regress/expected/brin_multi.out
index f3309f433f..28d136f59c 100644
--- a/src/test/regress/expected/brin_multi.out
+++ b/src/test/regress/expected/brin_multi.out
@@ -29,7 +29,7 @@ INSERT INTO brintest_multi SELECT
 	(four + 1.0)/(hundred+1),
 	odd::float8 / (tenthous + 1),
 	format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
-	substr(md5(unique1::text), 1, 16)::macaddr8,
+	substr(notmd5(unique1::text), 1, 16)::macaddr8,
 	inet '10.2.3.4/24' + tenthous,
 	cidr '10.2.3/24' + tenthous,
 	date '1995-08-15' + tenthous,
@@ -179,7 +179,7 @@ INSERT INTO brinopers_multi VALUES
 	('macaddr8col', 'macaddr8',
 	 '{>, >=, =, <=, <}',
 	 '{b1:d1:0e:7b:af:a4:42:12, d9:35:91:bd:f7:86:0e:1e, 72:8f:20:6c:2a:01:bf:57, 23:e8:46:63:86:07:ad:cb, 13:16:8e:6a:2e:6c:84:b4}',
-	 '{33, 15, 1, 13, 6}'),
+	 '{31, 17, 1, 11, 4}'),
 	('inetcol', 'inet',
 	 '{=, <, <=, >, >=}',
 	 '{10.2.14.231/24, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0}',
@@ -327,7 +327,7 @@ INSERT INTO brintest_multi SELECT
 	(four + 1.0)/(hundred+1),
 	odd::float8 / (tenthous + 1),
 	format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
-	substr(md5(unique1::text), 1, 16)::macaddr8,
+	substr(notmd5(unique1::text), 1, 16)::macaddr8,
 	inet '10.2.3.4' + tenthous,
 	cidr '10.2.3/24' + tenthous,
 	date '1995-08-15' + tenthous,
diff --git a/src/test/regress/expected/compression.out b/src/test/regress/expected/compression.out
index e06ac93a36..0e814e3192 100644
--- a/src/test/regress/expected/compression.out
+++ b/src/test/regress/expected/compression.out
@@ -102,7 +102,7 @@ SELECT pg_column_compression(f1) FROM cmmove2;
 
 -- test externally stored compressed data
 CREATE OR REPLACE FUNCTION large_val() RETURNS TEXT LANGUAGE SQL AS
-'select array_agg(md5(g::text))::text from generate_series(1, 256) g';
+'select array_agg(notmd5(g::text))::text from generate_series(1, 256) g';
 CREATE TABLE cmdata2 (f1 text COMPRESSION pglz);
 INSERT INTO cmdata2 SELECT large_val() || repeat('a', 4000);
 SELECT pg_column_compression(f1) FROM cmdata2;
@@ -123,13 +123,13 @@ SELECT SUBSTR(f1, 200, 5) FROM cmdata1;
  substr 
 --------
  01234
- 8f14e
+ 79026
 (2 rows)
 
 SELECT SUBSTR(f1, 200, 5) FROM cmdata2;
  substr 
 --------
- 8f14e
+ 79026
 (1 row)
 
 DROP TABLE cmdata2;
@@ -317,7 +317,7 @@ SELECT pg_column_compression(f1) FROM cmdata;
 DROP TABLE cmdata2;
 CREATE TABLE cmdata2 (f1 TEXT COMPRESSION pglz, f2 TEXT COMPRESSION lz4);
 CREATE UNIQUE INDEX idx1 ON cmdata2 ((f1 || f2));
-INSERT INTO cmdata2 VALUES((SELECT array_agg(md5(g::TEXT))::TEXT FROM
+INSERT INTO cmdata2 VALUES((SELECT array_agg(notmd5(g::TEXT))::TEXT FROM
 generate_series(1, 50) g), VERSION());
 -- check data is ok
 SELECT length(f1) FROM cmdata;
diff --git a/src/test/regress/expected/compression_1.out b/src/test/regress/expected/compression_1.out
index c0a47646eb..5fde7bf94f 100644
--- a/src/test/regress/expected/compression_1.out
+++ b/src/test/regress/expected/compression_1.out
@@ -102,7 +102,7 @@ SELECT pg_column_compression(f1) FROM cmmove2;
 
 -- test externally stored compressed data
 CREATE OR REPLACE FUNCTION large_val() RETURNS TEXT LANGUAGE SQL AS
-'select array_agg(md5(g::text))::text from generate_series(1, 256) g';
+'select array_agg(notmd5(g::text))::text from generate_series(1, 256) g';
 CREATE TABLE cmdata2 (f1 text COMPRESSION pglz);
 INSERT INTO cmdata2 SELECT large_val() || repeat('a', 4000);
 SELECT pg_column_compression(f1) FROM cmdata2;
@@ -126,7 +126,7 @@ LINE 1: SELECT SUBSTR(f1, 200, 5) FROM cmdata1;
 SELECT SUBSTR(f1, 200, 5) FROM cmdata2;
  substr 
 --------
- 8f14e
+ 79026
 (1 row)
 
 DROP TABLE cmdata2;
@@ -312,10 +312,10 @@ ERROR:  compression method lz4 not supported
 DETAIL:  This functionality requires the server to be built with lz4 support.
 CREATE UNIQUE INDEX idx1 ON cmdata2 ((f1 || f2));
 ERROR:  relation "cmdata2" does not exist
-INSERT INTO cmdata2 VALUES((SELECT array_agg(md5(g::TEXT))::TEXT FROM
+INSERT INTO cmdata2 VALUES((SELECT array_agg(notmd5(g::TEXT))::TEXT FROM
 generate_series(1, 50) g), VERSION());
 ERROR:  relation "cmdata2" does not exist
-LINE 1: INSERT INTO cmdata2 VALUES((SELECT array_agg(md5(g::TEXT))::...
+LINE 1: INSERT INTO cmdata2 VALUES((SELECT array_agg(notmd5(g::TEXT)...
                     ^
 -- check data is ok
 SELECT length(f1) FROM cmdata;
diff --git a/src/test/regress/expected/inherit.out b/src/test/regress/expected/inherit.out
index e2a0dc80b2..9f98f33b0d 100644
--- a/src/test/regress/expected/inherit.out
+++ b/src/test/regress/expected/inherit.out
@@ -2560,7 +2560,7 @@ alter table permtest_child attach partition permtest_grandchild for values in ('
 alter table permtest_parent attach partition permtest_child for values in (1);
 create index on permtest_parent (left(c, 3));
 insert into permtest_parent
-  select 1, 'a', left(md5(i::text), 5) from generate_series(0, 100) i;
+  select 1, 'a', left(notmd5(i::text), 5) from generate_series(0, 100) i;
 analyze permtest_parent;
 create role regress_no_child_access;
 revoke all on permtest_grandchild from regress_no_child_access;
diff --git a/src/test/regress/expected/largeobject.out b/src/test/regress/expected/largeobject.out
index 31fba2ff9d..af65664eb7 100644
--- a/src/test/regress/expected/largeobject.out
+++ b/src/test/regress/expected/largeobject.out
@@ -441,7 +441,7 @@ TRUNCATE lotest_stash_values;
 \set newloid_1 :LASTOID
 SELECT lo_from_bytea(0, lo_get(:newloid_1)) AS newloid_2
 \gset
-SELECT md5(lo_get(:newloid_1)) = md5(lo_get(:newloid_2));
+SELECT notmd5(lo_get(:newloid_1)) = notmd5(lo_get(:newloid_2));
  ?column? 
 ----------
  t
diff --git a/src/test/regress/expected/largeobject_1.out b/src/test/regress/expected/largeobject_1.out
index 7acd7f73e1..10f1782eeb 100644
--- a/src/test/regress/expected/largeobject_1.out
+++ b/src/test/regress/expected/largeobject_1.out
@@ -441,7 +441,7 @@ TRUNCATE lotest_stash_values;
 \set newloid_1 :LASTOID
 SELECT lo_from_bytea(0, lo_get(:newloid_1)) AS newloid_2
 \gset
-SELECT md5(lo_get(:newloid_1)) = md5(lo_get(:newloid_2));
+SELECT notmd5(lo_get(:newloid_1)) = notmd5(lo_get(:newloid_2));
  ?column? 
 ----------
  t
diff --git a/src/test/regress/expected/matview.out b/src/test/regress/expected/matview.out
index 87b6e569a5..8dcf51ccd4 100644
--- a/src/test/regress/expected/matview.out
+++ b/src/test/regress/expected/matview.out
@@ -556,10 +556,10 @@ SET ROLE regress_user_mvtest;
 -- duplicate all the aliases used in those queries
 CREATE TABLE mvtest_foo_data AS SELECT i,
   i+1 AS tid,
-  md5(random()::text) AS mv,
-  md5(random()::text) AS newdata,
-  md5(random()::text) AS newdata2,
-  md5(random()::text) AS diff
+  notmd5(random()::text) AS mv,
+  notmd5(random()::text) AS newdata,
+  notmd5(random()::text) AS newdata2,
+  notmd5(random()::text) AS diff
   FROM generate_series(1, 10) i;
 CREATE MATERIALIZED VIEW mvtest_mv_foo AS SELECT * FROM mvtest_foo_data;
 CREATE MATERIALIZED VIEW mvtest_mv_foo AS SELECT * FROM mvtest_foo_data;
diff --git a/src/test/regress/expected/memoize.out b/src/test/regress/expected/memoize.out
index 60cbdeec7a..42e4396269 100644
--- a/src/test/regress/expected/memoize.out
+++ b/src/test/regress/expected/memoize.out
@@ -164,7 +164,7 @@ DROP TABLE flt;
 CREATE TABLE strtest (n name, t text);
 CREATE INDEX strtest_n_idx ON strtest (n);
 CREATE INDEX strtest_t_idx ON strtest (t);
-INSERT INTO strtest VALUES('one','one'),('two','two'),('three',repeat(md5('three'),100));
+INSERT INTO strtest VALUES('one','one'),('two','two'),('three',repeat(notmd5('three'),100));
 -- duplicate rows so we get some cache hits
 INSERT INTO strtest SELECT * FROM strtest;
 ANALYZE strtest;
diff --git a/src/test/regress/expected/plpgsql.out b/src/test/regress/expected/plpgsql.out
index cdc519256a..8be2fa9b40 100644
--- a/src/test/regress/expected/plpgsql.out
+++ b/src/test/regress/expected/plpgsql.out
@@ -3404,22 +3404,22 @@ select * from ret_query1();
 create type record_type as (x text, y int, z boolean);
 create or replace function ret_query2(lim int) returns setof record_type as $$
 begin
-    return query select md5(s.x::text), s.x, s.x > 0
+    return query select notmd5(s.x::text), s.x, s.x > 0
                  from generate_series(-8, lim) s (x) where s.x % 2 = 0;
 end;
 $$ language plpgsql;
 select * from ret_query2(8);
                 x                 | y  | z 
 ----------------------------------+----+---
- a8d2ec85eaf98407310b72eb73dda247 | -8 | f
- 596a3d04481816330f07e4f97510c28f | -6 | f
- 0267aaf632e87a63288a08331f22c7c3 | -4 | f
- 5d7b9adcbe1c629ec722529dd12e5129 | -2 | f
- cfcd208495d565ef66e7dff9f98764da |  0 | f
- c81e728d9d4c2f636f067f89cc14862c |  2 | t
- a87ff679a2f3e71d9181a67b7542122c |  4 | t
- 1679091c5a880faf6fb5e6087eb1b2dc |  6 | t
- c9f0f895fb98ab9159f51fd0297e236d |  8 | t
+ e91592205d3881e3ea35d66973bb4898 | -8 | f
+ 03b26944890929ff751653acb2f2af79 | -6 | f
+ e5e0093f285a4fb94c3fcc2ad7fd04ed | -4 | f
+ cf3bae39dd692048a8bf961182e6a34d | -2 | f
+ 5feceb66ffc86f38d952786c6d696c79 |  0 | f
+ d4735e3a265e16eee03f59718b9b5d03 |  2 | t
+ 4b227777d4dd1fc61c6f884f48641d02 |  4 | t
+ e7f6c011776e8db7cd330b54174fd76f |  6 | t
+ 2c624232cdd221771294dfbb310aca00 |  8 | t
 (9 rows)
 
 -- test EXECUTE USING
diff --git a/src/test/regress/expected/rowsecurity.out b/src/test/regress/expected/rowsecurity.out
index a415ad168c..2a7160c1b9 100644
--- a/src/test/regress/expected/rowsecurity.out
+++ b/src/test/regress/expected/rowsecurity.out
@@ -1408,9 +1408,9 @@ ERROR:  infinite recursion detected in policy for relation "rec1"
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
 CREATE TABLE s1 (a int, b text);
-INSERT INTO s1 (SELECT x, md5(x::text) FROM generate_series(-10,10) x);
+INSERT INTO s1 (SELECT x, public.notmd5(x::text) FROM generate_series(-10,10) x);
 CREATE TABLE s2 (x int, y text);
-INSERT INTO s2 (SELECT x, md5(x::text) FROM generate_series(-6,6) x);
+INSERT INTO s2 (SELECT x, public.notmd5(x::text) FROM generate_series(-6,6) x);
 GRANT SELECT ON s1, s2 TO regress_rls_bob;
 CREATE POLICY p1 ON s1 USING (a in (select x from s2 where y like '%2f%'));
 CREATE POLICY p2 ON s2 USING (x in (select a from s1 where b like '%22%'));
@@ -1428,13 +1428,11 @@ DROP POLICY p3 on s1;
 ALTER POLICY p2 ON s2 USING (x % 2 = 0);
 SET SESSION AUTHORIZATION regress_rls_bob;
 SELECT * FROM s1 WHERE f_leak(b);	-- OK
-NOTICE:  f_leak => c81e728d9d4c2f636f067f89cc14862c
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
- a |                b                 
----+----------------------------------
- 2 | c81e728d9d4c2f636f067f89cc14862c
- 4 | a87ff679a2f3e71d9181a67b7542122c
-(2 rows)
+NOTICE:  f_leak => 03b26944890929ff751653acb2f2af79
+ a  |                b                 
+----+----------------------------------
+ -6 | 03b26944890929ff751653acb2f2af79
+(1 row)
 
 EXPLAIN (COSTS OFF) SELECT * FROM only s1 WHERE f_leak(b);
                         QUERY PLAN                         
@@ -1450,13 +1448,11 @@ SET SESSION AUTHORIZATION regress_rls_alice;
 ALTER POLICY p1 ON s1 USING (a in (select x from v2)); -- using VIEW in RLS policy
 SET SESSION AUTHORIZATION regress_rls_bob;
 SELECT * FROM s1 WHERE f_leak(b);	-- OK
-NOTICE:  f_leak => 0267aaf632e87a63288a08331f22c7c3
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
+NOTICE:  f_leak => 03b26944890929ff751653acb2f2af79
  a  |                b                 
 ----+----------------------------------
- -4 | 0267aaf632e87a63288a08331f22c7c3
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-(2 rows)
+ -6 | 03b26944890929ff751653acb2f2af79
+(1 row)
 
 EXPLAIN (COSTS OFF) SELECT * FROM s1 WHERE f_leak(b);
                         QUERY PLAN                         
@@ -1471,10 +1467,8 @@ EXPLAIN (COSTS OFF) SELECT * FROM s1 WHERE f_leak(b);
 SELECT (SELECT x FROM s1 LIMIT 1) xx, * FROM s2 WHERE y like '%28%';
  xx | x  |                y                 
 ----+----+----------------------------------
- -6 | -6 | 596a3d04481816330f07e4f97510c28f
- -4 | -4 | 0267aaf632e87a63288a08331f22c7c3
-  2 |  2 | c81e728d9d4c2f636f067f89cc14862c
-(3 rows)
+ -4 | -4 | e5e0093f285a4fb94c3fcc2ad7fd04ed
+(1 row)
 
 EXPLAIN (COSTS OFF) SELECT (SELECT x FROM s1 LIMIT 1) xx, * FROM s2 WHERE y like '%28%';
                                QUERY PLAN                                
@@ -1900,7 +1894,7 @@ NOTICE:  f_leak => yyyyyy
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
 CREATE TABLE b1 (a int, b text);
-INSERT INTO b1 (SELECT x, md5(x::text) FROM generate_series(-10,10) x);
+INSERT INTO b1 (SELECT x, public.notmd5(x::text) FROM generate_series(-10,10) x);
 CREATE POLICY p1 ON b1 USING (a % 2 = 0);
 ALTER TABLE b1 ENABLE ROW LEVEL SECURITY;
 GRANT ALL ON b1 TO regress_rls_bob;
@@ -1918,18 +1912,18 @@ EXPLAIN (COSTS OFF) SELECT * FROM bv1 WHERE f_leak(b);
 (4 rows)
 
 SELECT * FROM bv1 WHERE f_leak(b);
-NOTICE:  f_leak => c81e728d9d4c2f636f067f89cc14862c
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
-NOTICE:  f_leak => c9f0f895fb98ab9159f51fd0297e236d
-NOTICE:  f_leak => d3d9446802a44259755d38e6d163e820
+NOTICE:  f_leak => d4735e3a265e16eee03f59718b9b5d03
+NOTICE:  f_leak => 4b227777d4dd1fc61c6f884f48641d02
+NOTICE:  f_leak => e7f6c011776e8db7cd330b54174fd76f
+NOTICE:  f_leak => 2c624232cdd221771294dfbb310aca00
+NOTICE:  f_leak => 4a44dc15364204a80fe80e9039455cc1
  a  |                b                 
 ----+----------------------------------
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
 (5 rows)
 
 INSERT INTO bv1 VALUES (-1, 'xxx'); -- should fail view WCO
@@ -1946,7 +1940,7 @@ EXPLAIN (COSTS OFF) UPDATE bv1 SET b = 'yyy' WHERE a = 4 AND f_leak(b);
 (3 rows)
 
 UPDATE bv1 SET b = 'yyy' WHERE a = 4 AND f_leak(b);
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
+NOTICE:  f_leak => 4b227777d4dd1fc61c6f884f48641d02
 EXPLAIN (COSTS OFF) DELETE FROM bv1 WHERE a = 6 AND f_leak(b);
                               QUERY PLAN                               
 -----------------------------------------------------------------------
@@ -1956,30 +1950,30 @@ EXPLAIN (COSTS OFF) DELETE FROM bv1 WHERE a = 6 AND f_leak(b);
 (3 rows)
 
 DELETE FROM bv1 WHERE a = 6 AND f_leak(b);
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
+NOTICE:  f_leak => e7f6c011776e8db7cd330b54174fd76f
 SET SESSION AUTHORIZATION regress_rls_alice;
 SELECT * FROM b1;
   a  |                b                 
 -----+----------------------------------
- -10 | 1b0fd9efa5279c4203b7c70233f86dbf
-  -9 | 252e691406782824eec43d7eadc3d256
-  -8 | a8d2ec85eaf98407310b72eb73dda247
-  -7 | 74687a12d3915d3c4d83f1af7b3683d5
-  -6 | 596a3d04481816330f07e4f97510c28f
-  -5 | 47c1b025fa18ea96c33fbb6718688c0f
-  -4 | 0267aaf632e87a63288a08331f22c7c3
-  -3 | b3149ecea4628efd23d2f86e5a723472
-  -2 | 5d7b9adcbe1c629ec722529dd12e5129
-  -1 | 6bb61e3b7bce0931da574d19d1d82c88
-   0 | cfcd208495d565ef66e7dff9f98764da
-   1 | c4ca4238a0b923820dcc509a6f75849b
-   2 | c81e728d9d4c2f636f067f89cc14862c
-   3 | eccbc87e4b5ce2fe28308fd9f2a7baf3
-   5 | e4da3b7fbbce2345d7772b0674a318d5
-   7 | 8f14e45fceea167a5a36dedd4bea2543
-   8 | c9f0f895fb98ab9159f51fd0297e236d
-   9 | 45c48cce2e2d7fbdea1afc51c7c6ad26
-  10 | d3d9446802a44259755d38e6d163e820
+ -10 | c171d4ec282b23db89a99880cd624e9b
+  -9 | d5c534fde62beb89c745a59952c8efed
+  -8 | e91592205d3881e3ea35d66973bb4898
+  -7 | a770d3270c9dcdedf12ed9fd70444f7c
+  -6 | 03b26944890929ff751653acb2f2af79
+  -5 | 37aa1ccf80e481832b2db282d4d4f895
+  -4 | e5e0093f285a4fb94c3fcc2ad7fd04ed
+  -3 | 615bdd17c2556f82f384392ea8557f8c
+  -2 | cf3bae39dd692048a8bf961182e6a34d
+  -1 | 1bad6b8cf97131fceab8543e81f77571
+   0 | 5feceb66ffc86f38d952786c6d696c79
+   1 | 6b86b273ff34fce19d6b804eff5a3f57
+   2 | d4735e3a265e16eee03f59718b9b5d03
+   3 | 4e07408562bedb8b60ce05c1decfe3ad
+   5 | ef2d127de37b942baad06145e54b0c61
+   7 | 7902699be42c8a8e46fbbb4501726517
+   8 | 2c624232cdd221771294dfbb310aca00
+   9 | 19581e27de7ced00ff1ce50b2047e7a5
+  10 | 4a44dc15364204a80fe80e9039455cc1
   12 | xxx
    4 | yyy
 (21 rows)
@@ -3038,41 +3032,41 @@ DROP VIEW rls_sbv;
 -- Expression structure
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
-INSERT INTO y2 (SELECT x, md5(x::text) FROM generate_series(0,20) x);
+INSERT INTO y2 (SELECT x, public.notmd5(x::text) FROM generate_series(0,20) x);
 CREATE POLICY p2 ON y2 USING (a % 3 = 0);
 CREATE POLICY p3 ON y2 USING (a % 4 = 0);
 SET SESSION AUTHORIZATION regress_rls_bob;
 SELECT * FROM y2 WHERE f_leak(b);
-NOTICE:  f_leak => cfcd208495d565ef66e7dff9f98764da
-NOTICE:  f_leak => c81e728d9d4c2f636f067f89cc14862c
-NOTICE:  f_leak => eccbc87e4b5ce2fe28308fd9f2a7baf3
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
-NOTICE:  f_leak => c9f0f895fb98ab9159f51fd0297e236d
-NOTICE:  f_leak => 45c48cce2e2d7fbdea1afc51c7c6ad26
-NOTICE:  f_leak => d3d9446802a44259755d38e6d163e820
-NOTICE:  f_leak => c20ad4d76fe97759aa27a0c99bff6710
-NOTICE:  f_leak => aab3238922bcc25a6f606eb525ffdc56
-NOTICE:  f_leak => 9bf31c7ff062936a96d3c8bd1f8f2ff3
-NOTICE:  f_leak => c74d97b01eae257e44aa9d5bade97baf
-NOTICE:  f_leak => 6f4922f45568161a8cdf4ad2299f6d23
-NOTICE:  f_leak => 98f13708210194c475687be6106a3b84
+NOTICE:  f_leak => 5feceb66ffc86f38d952786c6d696c79
+NOTICE:  f_leak => d4735e3a265e16eee03f59718b9b5d03
+NOTICE:  f_leak => 4e07408562bedb8b60ce05c1decfe3ad
+NOTICE:  f_leak => 4b227777d4dd1fc61c6f884f48641d02
+NOTICE:  f_leak => e7f6c011776e8db7cd330b54174fd76f
+NOTICE:  f_leak => 2c624232cdd221771294dfbb310aca00
+NOTICE:  f_leak => 19581e27de7ced00ff1ce50b2047e7a5
+NOTICE:  f_leak => 4a44dc15364204a80fe80e9039455cc1
+NOTICE:  f_leak => 6b51d431df5d7f141cbececcf79edf3d
+NOTICE:  f_leak => 8527a891e224136950ff32ca212b45bc
+NOTICE:  f_leak => e629fa6598d732768f7c726b4b621285
+NOTICE:  f_leak => b17ef6d19c7a5b1ee83b907c595526dc
+NOTICE:  f_leak => 4ec9599fc203d176a301536c2e091a19
+NOTICE:  f_leak => f5ca38f748a1d6eaf726b8a42fb575c3
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  3 | eccbc87e4b5ce2fe28308fd9f2a7baf3
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
-  9 | 45c48cce2e2d7fbdea1afc51c7c6ad26
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 15 | 9bf31c7ff062936a96d3c8bd1f8f2ff3
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  3 | 4e07408562bedb8b60ce05c1decfe3ad
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+  9 | 19581e27de7ced00ff1ce50b2047e7a5
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 15 | e629fa6598d732768f7c726b4b621285
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
 (14 rows)
 
 EXPLAIN (COSTS OFF) SELECT * FROM y2 WHERE f_leak(b);
@@ -3109,20 +3103,20 @@ NOTICE:  f_leak => abc
 NOTICE:  f_leak => abc
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  3 | eccbc87e4b5ce2fe28308fd9f2a7baf3
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
-  9 | 45c48cce2e2d7fbdea1afc51c7c6ad26
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 15 | 9bf31c7ff062936a96d3c8bd1f8f2ff3
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  3 | 4e07408562bedb8b60ce05c1decfe3ad
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+  9 | 19581e27de7ced00ff1ce50b2047e7a5
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 15 | e629fa6598d732768f7c726b4b621285
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
 (14 rows)
 
 EXPLAIN (COSTS OFF) SELECT * FROM y2 WHERE f_leak('abc');
@@ -3156,20 +3150,20 @@ EXPLAIN (COSTS OFF) SELECT * FROM y2 JOIN test_qual_pushdown ON (b = abc) WHERE
 (7 rows)
 
 SELECT * FROM y2 JOIN test_qual_pushdown ON (b = abc) WHERE f_leak(b);
-NOTICE:  f_leak => cfcd208495d565ef66e7dff9f98764da
-NOTICE:  f_leak => c81e728d9d4c2f636f067f89cc14862c
-NOTICE:  f_leak => eccbc87e4b5ce2fe28308fd9f2a7baf3
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
-NOTICE:  f_leak => c9f0f895fb98ab9159f51fd0297e236d
-NOTICE:  f_leak => 45c48cce2e2d7fbdea1afc51c7c6ad26
-NOTICE:  f_leak => d3d9446802a44259755d38e6d163e820
-NOTICE:  f_leak => c20ad4d76fe97759aa27a0c99bff6710
-NOTICE:  f_leak => aab3238922bcc25a6f606eb525ffdc56
-NOTICE:  f_leak => 9bf31c7ff062936a96d3c8bd1f8f2ff3
-NOTICE:  f_leak => c74d97b01eae257e44aa9d5bade97baf
-NOTICE:  f_leak => 6f4922f45568161a8cdf4ad2299f6d23
-NOTICE:  f_leak => 98f13708210194c475687be6106a3b84
+NOTICE:  f_leak => 5feceb66ffc86f38d952786c6d696c79
+NOTICE:  f_leak => d4735e3a265e16eee03f59718b9b5d03
+NOTICE:  f_leak => 4e07408562bedb8b60ce05c1decfe3ad
+NOTICE:  f_leak => 4b227777d4dd1fc61c6f884f48641d02
+NOTICE:  f_leak => e7f6c011776e8db7cd330b54174fd76f
+NOTICE:  f_leak => 2c624232cdd221771294dfbb310aca00
+NOTICE:  f_leak => 19581e27de7ced00ff1ce50b2047e7a5
+NOTICE:  f_leak => 4a44dc15364204a80fe80e9039455cc1
+NOTICE:  f_leak => 6b51d431df5d7f141cbececcf79edf3d
+NOTICE:  f_leak => 8527a891e224136950ff32ca212b45bc
+NOTICE:  f_leak => e629fa6598d732768f7c726b4b621285
+NOTICE:  f_leak => b17ef6d19c7a5b1ee83b907c595526dc
+NOTICE:  f_leak => 4ec9599fc203d176a301536c2e091a19
+NOTICE:  f_leak => f5ca38f748a1d6eaf726b8a42fb575c3
  a | b | abc 
 ---+---+-----
 (0 rows)
@@ -3239,33 +3233,33 @@ CREATE TABLE t1 (a integer, b text);
 CREATE POLICY p1 ON t1 USING (a % 2 = 0);
 ALTER TABLE t1 ENABLE ROW LEVEL SECURITY;
 GRANT ALL ON t1 TO regress_rls_bob;
-INSERT INTO t1 (SELECT x, md5(x::text) FROM generate_series(0,20) x);
+INSERT INTO t1 (SELECT x, public.notmd5(x::text) FROM generate_series(0,20) x);
 SET SESSION AUTHORIZATION regress_rls_bob;
 WITH cte1 AS MATERIALIZED (SELECT * FROM t1 WHERE f_leak(b)) SELECT * FROM cte1;
-NOTICE:  f_leak => cfcd208495d565ef66e7dff9f98764da
-NOTICE:  f_leak => c81e728d9d4c2f636f067f89cc14862c
-NOTICE:  f_leak => a87ff679a2f3e71d9181a67b7542122c
-NOTICE:  f_leak => 1679091c5a880faf6fb5e6087eb1b2dc
-NOTICE:  f_leak => c9f0f895fb98ab9159f51fd0297e236d
-NOTICE:  f_leak => d3d9446802a44259755d38e6d163e820
-NOTICE:  f_leak => c20ad4d76fe97759aa27a0c99bff6710
-NOTICE:  f_leak => aab3238922bcc25a6f606eb525ffdc56
-NOTICE:  f_leak => c74d97b01eae257e44aa9d5bade97baf
-NOTICE:  f_leak => 6f4922f45568161a8cdf4ad2299f6d23
-NOTICE:  f_leak => 98f13708210194c475687be6106a3b84
+NOTICE:  f_leak => 5feceb66ffc86f38d952786c6d696c79
+NOTICE:  f_leak => d4735e3a265e16eee03f59718b9b5d03
+NOTICE:  f_leak => 4b227777d4dd1fc61c6f884f48641d02
+NOTICE:  f_leak => e7f6c011776e8db7cd330b54174fd76f
+NOTICE:  f_leak => 2c624232cdd221771294dfbb310aca00
+NOTICE:  f_leak => 4a44dc15364204a80fe80e9039455cc1
+NOTICE:  f_leak => 6b51d431df5d7f141cbececcf79edf3d
+NOTICE:  f_leak => 8527a891e224136950ff32ca212b45bc
+NOTICE:  f_leak => b17ef6d19c7a5b1ee83b907c595526dc
+NOTICE:  f_leak => 4ec9599fc203d176a301536c2e091a19
+NOTICE:  f_leak => f5ca38f748a1d6eaf726b8a42fb575c3
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
 (11 rows)
 
 EXPLAIN (COSTS OFF)
@@ -3283,17 +3277,17 @@ ERROR:  new row violates row-level security policy for table "t1"
 WITH cte1 AS (UPDATE t1 SET a = a RETURNING *) SELECT * FROM cte1; --ok
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
 (11 rows)
 
 WITH cte1 AS (INSERT INTO t1 VALUES (21, 'Fail') RETURNING *) SELECT * FROM cte1; --fail
@@ -3346,17 +3340,17 @@ EXPLAIN (COSTS OFF) INSERT INTO t2 (SELECT * FROM t1);
 SELECT * FROM t2;
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
  20 | Success
 (12 rows)
 
@@ -3370,17 +3364,17 @@ CREATE TABLE t3 AS SELECT * FROM t1;
 SELECT * FROM t3;
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
  20 | Success
 (12 rows)
 
@@ -3388,17 +3382,17 @@ SELECT * INTO t4 FROM t1;
 SELECT * FROM t4;
  a  |                b                 
 ----+----------------------------------
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
  20 | Success
 (12 rows)
 
@@ -3471,27 +3465,27 @@ RESET SESSION AUTHORIZATION;
 SELECT * FROM t1;
  a  |                b                 
 ----+----------------------------------
-  1 | c4ca4238a0b923820dcc509a6f75849b
-  3 | eccbc87e4b5ce2fe28308fd9f2a7baf3
-  5 | e4da3b7fbbce2345d7772b0674a318d5
-  7 | 8f14e45fceea167a5a36dedd4bea2543
-  9 | 45c48cce2e2d7fbdea1afc51c7c6ad26
- 11 | 6512bd43d9caa6e02c990b0a82652dca
- 13 | c51ce410c124a10e0db5e4b97fc2af39
- 15 | 9bf31c7ff062936a96d3c8bd1f8f2ff3
- 17 | 70efdf2ec9b086079795c442636b55fb
- 19 | 1f0e3dad99908345f7439f8ffabdffc4
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  1 | 6b86b273ff34fce19d6b804eff5a3f57
+  3 | 4e07408562bedb8b60ce05c1decfe3ad
+  5 | ef2d127de37b942baad06145e54b0c61
+  7 | 7902699be42c8a8e46fbbb4501726517
+  9 | 19581e27de7ced00ff1ce50b2047e7a5
+ 11 | 4fc82b26aecb47d2868c4efbe3581732
+ 13 | 3fdba35f04dc8c462986c992bcf87554
+ 15 | e629fa6598d732768f7c726b4b621285
+ 17 | 4523540f1504cd17100c4835e85b7eef
+ 19 | 9400f1b21cb527d7fa3d3eabba93557a
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
  20 | Success
 (22 rows)
 
@@ -3506,27 +3500,27 @@ SET SESSION AUTHORIZATION regress_rls_alice;
 SELECT * FROM t1;
  a  |                b                 
 ----+----------------------------------
-  1 | c4ca4238a0b923820dcc509a6f75849b
-  3 | eccbc87e4b5ce2fe28308fd9f2a7baf3
-  5 | e4da3b7fbbce2345d7772b0674a318d5
-  7 | 8f14e45fceea167a5a36dedd4bea2543
-  9 | 45c48cce2e2d7fbdea1afc51c7c6ad26
- 11 | 6512bd43d9caa6e02c990b0a82652dca
- 13 | c51ce410c124a10e0db5e4b97fc2af39
- 15 | 9bf31c7ff062936a96d3c8bd1f8f2ff3
- 17 | 70efdf2ec9b086079795c442636b55fb
- 19 | 1f0e3dad99908345f7439f8ffabdffc4
-  0 | cfcd208495d565ef66e7dff9f98764da
-  2 | c81e728d9d4c2f636f067f89cc14862c
-  4 | a87ff679a2f3e71d9181a67b7542122c
-  6 | 1679091c5a880faf6fb5e6087eb1b2dc
-  8 | c9f0f895fb98ab9159f51fd0297e236d
- 10 | d3d9446802a44259755d38e6d163e820
- 12 | c20ad4d76fe97759aa27a0c99bff6710
- 14 | aab3238922bcc25a6f606eb525ffdc56
- 16 | c74d97b01eae257e44aa9d5bade97baf
- 18 | 6f4922f45568161a8cdf4ad2299f6d23
- 20 | 98f13708210194c475687be6106a3b84
+  1 | 6b86b273ff34fce19d6b804eff5a3f57
+  3 | 4e07408562bedb8b60ce05c1decfe3ad
+  5 | ef2d127de37b942baad06145e54b0c61
+  7 | 7902699be42c8a8e46fbbb4501726517
+  9 | 19581e27de7ced00ff1ce50b2047e7a5
+ 11 | 4fc82b26aecb47d2868c4efbe3581732
+ 13 | 3fdba35f04dc8c462986c992bcf87554
+ 15 | e629fa6598d732768f7c726b4b621285
+ 17 | 4523540f1504cd17100c4835e85b7eef
+ 19 | 9400f1b21cb527d7fa3d3eabba93557a
+  0 | 5feceb66ffc86f38d952786c6d696c79
+  2 | d4735e3a265e16eee03f59718b9b5d03
+  4 | 4b227777d4dd1fc61c6f884f48641d02
+  6 | e7f6c011776e8db7cd330b54174fd76f
+  8 | 2c624232cdd221771294dfbb310aca00
+ 10 | 4a44dc15364204a80fe80e9039455cc1
+ 12 | 6b51d431df5d7f141cbececcf79edf3d
+ 14 | 8527a891e224136950ff32ca212b45bc
+ 16 | b17ef6d19c7a5b1ee83b907c595526dc
+ 18 | 4ec9599fc203d176a301536c2e091a19
+ 20 | f5ca38f748a1d6eaf726b8a42fb575c3
  20 | Success
 (22 rows)
 
@@ -3574,35 +3568,35 @@ CREATE TABLE copy_t (a integer, b text);
 CREATE POLICY p1 ON copy_t USING (a % 2 = 0);
 ALTER TABLE copy_t ENABLE ROW LEVEL SECURITY;
 GRANT ALL ON copy_t TO regress_rls_bob, regress_rls_exempt_user;
-INSERT INTO copy_t (SELECT x, md5(x::text) FROM generate_series(0,10) x);
+INSERT INTO copy_t (SELECT x, public.notmd5(x::text) FROM generate_series(0,10) x);
 -- Check COPY TO as Superuser/owner.
 RESET SESSION AUTHORIZATION;
 SET row_security TO OFF;
 COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ',';
-0,cfcd208495d565ef66e7dff9f98764da
-1,c4ca4238a0b923820dcc509a6f75849b
-2,c81e728d9d4c2f636f067f89cc14862c
-3,eccbc87e4b5ce2fe28308fd9f2a7baf3
-4,a87ff679a2f3e71d9181a67b7542122c
-5,e4da3b7fbbce2345d7772b0674a318d5
-6,1679091c5a880faf6fb5e6087eb1b2dc
-7,8f14e45fceea167a5a36dedd4bea2543
-8,c9f0f895fb98ab9159f51fd0297e236d
-9,45c48cce2e2d7fbdea1afc51c7c6ad26
-10,d3d9446802a44259755d38e6d163e820
+0,5feceb66ffc86f38d952786c6d696c79
+1,6b86b273ff34fce19d6b804eff5a3f57
+2,d4735e3a265e16eee03f59718b9b5d03
+3,4e07408562bedb8b60ce05c1decfe3ad
+4,4b227777d4dd1fc61c6f884f48641d02
+5,ef2d127de37b942baad06145e54b0c61
+6,e7f6c011776e8db7cd330b54174fd76f
+7,7902699be42c8a8e46fbbb4501726517
+8,2c624232cdd221771294dfbb310aca00
+9,19581e27de7ced00ff1ce50b2047e7a5
+10,4a44dc15364204a80fe80e9039455cc1
 SET row_security TO ON;
 COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ',';
-0,cfcd208495d565ef66e7dff9f98764da
-1,c4ca4238a0b923820dcc509a6f75849b
-2,c81e728d9d4c2f636f067f89cc14862c
-3,eccbc87e4b5ce2fe28308fd9f2a7baf3
-4,a87ff679a2f3e71d9181a67b7542122c
-5,e4da3b7fbbce2345d7772b0674a318d5
-6,1679091c5a880faf6fb5e6087eb1b2dc
-7,8f14e45fceea167a5a36dedd4bea2543
-8,c9f0f895fb98ab9159f51fd0297e236d
-9,45c48cce2e2d7fbdea1afc51c7c6ad26
-10,d3d9446802a44259755d38e6d163e820
+0,5feceb66ffc86f38d952786c6d696c79
+1,6b86b273ff34fce19d6b804eff5a3f57
+2,d4735e3a265e16eee03f59718b9b5d03
+3,4e07408562bedb8b60ce05c1decfe3ad
+4,4b227777d4dd1fc61c6f884f48641d02
+5,ef2d127de37b942baad06145e54b0c61
+6,e7f6c011776e8db7cd330b54174fd76f
+7,7902699be42c8a8e46fbbb4501726517
+8,2c624232cdd221771294dfbb310aca00
+9,19581e27de7ced00ff1ce50b2047e7a5
+10,4a44dc15364204a80fe80e9039455cc1
 -- Check COPY TO as user with permissions.
 SET SESSION AUTHORIZATION regress_rls_bob;
 SET row_security TO OFF;
@@ -3610,40 +3604,40 @@ COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ','; --fail
 ERROR:  query would be affected by row-level security policy for table "copy_t"
 SET row_security TO ON;
 COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ','; --ok
-0,cfcd208495d565ef66e7dff9f98764da
-2,c81e728d9d4c2f636f067f89cc14862c
-4,a87ff679a2f3e71d9181a67b7542122c
-6,1679091c5a880faf6fb5e6087eb1b2dc
-8,c9f0f895fb98ab9159f51fd0297e236d
-10,d3d9446802a44259755d38e6d163e820
+0,5feceb66ffc86f38d952786c6d696c79
+2,d4735e3a265e16eee03f59718b9b5d03
+4,4b227777d4dd1fc61c6f884f48641d02
+6,e7f6c011776e8db7cd330b54174fd76f
+8,2c624232cdd221771294dfbb310aca00
+10,4a44dc15364204a80fe80e9039455cc1
 -- Check COPY TO as user with permissions and BYPASSRLS
 SET SESSION AUTHORIZATION regress_rls_exempt_user;
 SET row_security TO OFF;
 COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ','; --ok
-0,cfcd208495d565ef66e7dff9f98764da
-1,c4ca4238a0b923820dcc509a6f75849b
-2,c81e728d9d4c2f636f067f89cc14862c
-3,eccbc87e4b5ce2fe28308fd9f2a7baf3
-4,a87ff679a2f3e71d9181a67b7542122c
-5,e4da3b7fbbce2345d7772b0674a318d5
-6,1679091c5a880faf6fb5e6087eb1b2dc
-7,8f14e45fceea167a5a36dedd4bea2543
-8,c9f0f895fb98ab9159f51fd0297e236d
-9,45c48cce2e2d7fbdea1afc51c7c6ad26
-10,d3d9446802a44259755d38e6d163e820
+0,5feceb66ffc86f38d952786c6d696c79
+1,6b86b273ff34fce19d6b804eff5a3f57
+2,d4735e3a265e16eee03f59718b9b5d03
+3,4e07408562bedb8b60ce05c1decfe3ad
+4,4b227777d4dd1fc61c6f884f48641d02
+5,ef2d127de37b942baad06145e54b0c61
+6,e7f6c011776e8db7cd330b54174fd76f
+7,7902699be42c8a8e46fbbb4501726517
+8,2c624232cdd221771294dfbb310aca00
+9,19581e27de7ced00ff1ce50b2047e7a5
+10,4a44dc15364204a80fe80e9039455cc1
 SET row_security TO ON;
 COPY (SELECT * FROM copy_t ORDER BY a ASC) TO STDOUT WITH DELIMITER ','; --ok
-0,cfcd208495d565ef66e7dff9f98764da
-1,c4ca4238a0b923820dcc509a6f75849b
-2,c81e728d9d4c2f636f067f89cc14862c
-3,eccbc87e4b5ce2fe28308fd9f2a7baf3
-4,a87ff679a2f3e71d9181a67b7542122c
-5,e4da3b7fbbce2345d7772b0674a318d5
-6,1679091c5a880faf6fb5e6087eb1b2dc
-7,8f14e45fceea167a5a36dedd4bea2543
-8,c9f0f895fb98ab9159f51fd0297e236d
-9,45c48cce2e2d7fbdea1afc51c7c6ad26
-10,d3d9446802a44259755d38e6d163e820
+0,5feceb66ffc86f38d952786c6d696c79
+1,6b86b273ff34fce19d6b804eff5a3f57
+2,d4735e3a265e16eee03f59718b9b5d03
+3,4e07408562bedb8b60ce05c1decfe3ad
+4,4b227777d4dd1fc61c6f884f48641d02
+5,ef2d127de37b942baad06145e54b0c61
+6,e7f6c011776e8db7cd330b54174fd76f
+7,7902699be42c8a8e46fbbb4501726517
+8,2c624232cdd221771294dfbb310aca00
+9,19581e27de7ced00ff1ce50b2047e7a5
+10,4a44dc15364204a80fe80e9039455cc1
 -- Check COPY TO as user without permissions. SET row_security TO OFF;
 SET SESSION AUTHORIZATION regress_rls_carol;
 SET row_security TO OFF;
@@ -3659,15 +3653,15 @@ CREATE TABLE copy_rel_to (a integer, b text);
 CREATE POLICY p1 ON copy_rel_to USING (a % 2 = 0);
 ALTER TABLE copy_rel_to ENABLE ROW LEVEL SECURITY;
 GRANT ALL ON copy_rel_to TO regress_rls_bob, regress_rls_exempt_user;
-INSERT INTO copy_rel_to VALUES (1, md5('1'));
+INSERT INTO copy_rel_to VALUES (1, public.notmd5('1'));
 -- Check COPY TO as Superuser/owner.
 RESET SESSION AUTHORIZATION;
 SET row_security TO OFF;
 COPY copy_rel_to TO STDOUT WITH DELIMITER ',';
-1,c4ca4238a0b923820dcc509a6f75849b
+1,6b86b273ff34fce19d6b804eff5a3f57
 SET row_security TO ON;
 COPY copy_rel_to TO STDOUT WITH DELIMITER ',';
-1,c4ca4238a0b923820dcc509a6f75849b
+1,6b86b273ff34fce19d6b804eff5a3f57
 -- Check COPY TO as user with permissions.
 SET SESSION AUTHORIZATION regress_rls_bob;
 SET row_security TO OFF;
@@ -3679,10 +3673,10 @@ COPY copy_rel_to TO STDOUT WITH DELIMITER ','; --ok
 SET SESSION AUTHORIZATION regress_rls_exempt_user;
 SET row_security TO OFF;
 COPY copy_rel_to TO STDOUT WITH DELIMITER ','; --ok
-1,c4ca4238a0b923820dcc509a6f75849b
+1,6b86b273ff34fce19d6b804eff5a3f57
 SET row_security TO ON;
 COPY copy_rel_to TO STDOUT WITH DELIMITER ','; --ok
-1,c4ca4238a0b923820dcc509a6f75849b
+1,6b86b273ff34fce19d6b804eff5a3f57
 -- Check COPY TO as user without permissions. SET row_security TO OFF;
 SET SESSION AUTHORIZATION regress_rls_carol;
 SET row_security TO OFF;
diff --git a/src/test/regress/expected/stats_ext.out b/src/test/regress/expected/stats_ext.out
index 03880874c1..8777c9fc2b 100644
--- a/src/test/regress/expected/stats_ext.out
+++ b/src/test/regress/expected/stats_ext.out
@@ -2615,18 +2615,18 @@ CREATE TABLE mcv_lists_uuid (
 WITH (autovacuum_enabled = off);
 INSERT INTO mcv_lists_uuid (a, b, c)
      SELECT
-         md5(mod(i,100)::text)::uuid,
-         md5(mod(i,50)::text)::uuid,
-         md5(mod(i,25)::text)::uuid
+         notmd5(mod(i,100)::text)::uuid,
+         notmd5(mod(i,50)::text)::uuid,
+         notmd5(mod(i,25)::text)::uuid
      FROM generate_series(1,5000) s(i);
 ANALYZE mcv_lists_uuid;
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
  estimated | actual 
 -----------+--------
          1 |     50
 (1 row)
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND c = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND c = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
  estimated | actual 
 -----------+--------
          1 |     50
@@ -2635,13 +2635,13 @@ SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''167
 CREATE STATISTICS mcv_lists_uuid_stats (mcv) ON a, b, c
   FROM mcv_lists_uuid;
 ANALYZE mcv_lists_uuid;
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
  estimated | actual 
 -----------+--------
         50 |     50
 (1 row)
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND c = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND c = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
  estimated | actual 
 -----------+--------
         50 |     50
@@ -2657,7 +2657,7 @@ CREATE TABLE mcv_lists_arrays (
 WITH (autovacuum_enabled = off);
 INSERT INTO mcv_lists_arrays (a, b, c)
      SELECT
-         ARRAY[md5((i/100)::text), md5((i/100-1)::text), md5((i/100+1)::text)],
+         ARRAY[notmd5((i/100)::text), notmd5((i/100-1)::text), notmd5((i/100+1)::text)],
          ARRAY[(i/100-1)::numeric/1000, (i/100)::numeric/1000, (i/100+1)::numeric/1000],
          ARRAY[(i/100-1), i/100, (i/100+1)]
      FROM generate_series(1,5000) s(i);
@@ -3038,7 +3038,7 @@ SELECT * FROM check_estimated_rows('SELECT * FROM expr_stats WHERE a = 0 AND b =
 DROP TABLE expr_stats;
 -- statistics on expressions with different data types
 CREATE TABLE expr_stats (a int, b name, c text);
-INSERT INTO expr_stats SELECT mod(i,10), md5(mod(i,10)::text), md5(mod(i,10)::text) FROM generate_series(1,1000) s(i);
+INSERT INTO expr_stats SELECT mod(i,10), notmd5(mod(i,10)::text), notmd5(mod(i,10)::text) FROM generate_series(1,1000) s(i);
 ANALYZE expr_stats;
 SELECT * FROM check_estimated_rows('SELECT * FROM expr_stats WHERE a = 0 AND (b || c) <= ''z'' AND (c || b) >= ''0''');
  estimated | actual 
diff --git a/src/test/regress/expected/test_setup.out b/src/test/regress/expected/test_setup.out
index 4f54fe20ec..258d4cd60f 100644
--- a/src/test/regress/expected/test_setup.out
+++ b/src/test/regress/expected/test_setup.out
@@ -231,3 +231,15 @@ create function part_hashtext_length(value text, seed int8)
 create operator class part_test_text_ops for type text using hash as
     operator 1 =,
     function 2 part_hashtext_length(text, int8);
+--
+-- These functions are used in tests that used to use md5(), which we now
+-- mostly avoid so that the tests will pass in FIPS mode.
+--
+create function notmd5(bytea)
+    returns text
+    strict immutable parallel safe leakproof
+    begin atomic; select substr(encode(sha256($1), 'hex'), 1, 32); end;
+create function notmd5(text)
+    returns text
+    strict immutable parallel safe leakproof
+    begin atomic; select substr(encode(sha256($1::bytea), 'hex'), 1, 32); end;
diff --git a/src/test/regress/sql/arrays.sql b/src/test/regress/sql/arrays.sql
index 6ea4dba9f1..39c44ca47a 100644
--- a/src/test/regress/sql/arrays.sql
+++ b/src/test/regress/sql/arrays.sql
@@ -677,12 +677,12 @@ insert into src
 create type textandtext as (c1 text, c2 text);
 create temp table dest (f1 textandtext[]);
 insert into dest select array[row(f1,f1)::textandtext] from src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
 delete from src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
 truncate table src;
 drop table src;
-select length(md5((f1[1]).c2)) from dest;
+select length(notmd5((f1[1]).c2)) from dest;
 drop table dest;
 drop type textandtext;
 
diff --git a/src/test/regress/sql/brin.sql b/src/test/regress/sql/brin.sql
index e68e9e18df..aea5ed778b 100644
--- a/src/test/regress/sql/brin.sql
+++ b/src/test/regress/sql/brin.sql
@@ -476,7 +476,7 @@ CREATE TABLE brintest_3 (a text, b text, c text, d text);
 
 -- long random strings (~2000 chars each, so ~6kB for min/max on two
 -- columns) to trigger toasting
-WITH rand_value AS (SELECT string_agg(md5(i::text),'') AS val FROM generate_series(1,60) s(i))
+WITH rand_value AS (SELECT string_agg(notmd5(i::text),'') AS val FROM generate_series(1,60) s(i))
 INSERT INTO brintest_3
 SELECT val, val, val, val FROM rand_value;
 
@@ -495,7 +495,7 @@ VACUUM brintest_3;
 -- retry insert with a different random-looking (but deterministic) value
 -- the value is different, and so should replace either min or max in the
 -- brin summary
-WITH rand_value AS (SELECT string_agg(md5((-i)::text),'') AS val FROM generate_series(1,60) s(i))
+WITH rand_value AS (SELECT string_agg(notmd5((-i)::text),'') AS val FROM generate_series(1,60) s(i))
 INSERT INTO brintest_3
 SELECT val, val, val, val FROM rand_value;
 
diff --git a/src/test/regress/sql/brin_multi.sql b/src/test/regress/sql/brin_multi.sql
index 2189b6ccf4..ad67bd8828 100644
--- a/src/test/regress/sql/brin_multi.sql
+++ b/src/test/regress/sql/brin_multi.sql
@@ -30,7 +30,7 @@ INSERT INTO brintest_multi SELECT
 	(four + 1.0)/(hundred+1),
 	odd::float8 / (tenthous + 1),
 	format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
-	substr(md5(unique1::text), 1, 16)::macaddr8,
+	substr(notmd5(unique1::text), 1, 16)::macaddr8,
 	inet '10.2.3.4/24' + tenthous,
 	cidr '10.2.3/24' + tenthous,
 	date '1995-08-15' + tenthous,
@@ -183,7 +183,7 @@ INSERT INTO brinopers_multi VALUES
 	('macaddr8col', 'macaddr8',
 	 '{>, >=, =, <=, <}',
 	 '{b1:d1:0e:7b:af:a4:42:12, d9:35:91:bd:f7:86:0e:1e, 72:8f:20:6c:2a:01:bf:57, 23:e8:46:63:86:07:ad:cb, 13:16:8e:6a:2e:6c:84:b4}',
-	 '{33, 15, 1, 13, 6}'),
+	 '{31, 17, 1, 11, 4}'),
 	('inetcol', 'inet',
 	 '{=, <, <=, >, >=}',
 	 '{10.2.14.231/24, 255.255.255.255, 255.255.255.255, 0.0.0.0, 0.0.0.0}',
@@ -334,7 +334,7 @@ INSERT INTO brintest_multi SELECT
 	(four + 1.0)/(hundred+1),
 	odd::float8 / (tenthous + 1),
 	format('%s:00:%s:00:%s:00', to_hex(odd), to_hex(even), to_hex(hundred))::macaddr,
-	substr(md5(unique1::text), 1, 16)::macaddr8,
+	substr(notmd5(unique1::text), 1, 16)::macaddr8,
 	inet '10.2.3.4' + tenthous,
 	cidr '10.2.3/24' + tenthous,
 	date '1995-08-15' + tenthous,
diff --git a/src/test/regress/sql/compression.sql b/src/test/regress/sql/compression.sql
index 86332dcc51..d8fd3be855 100644
--- a/src/test/regress/sql/compression.sql
+++ b/src/test/regress/sql/compression.sql
@@ -48,7 +48,7 @@ SELECT pg_column_compression(f1) FROM cmmove2;
 
 -- test externally stored compressed data
 CREATE OR REPLACE FUNCTION large_val() RETURNS TEXT LANGUAGE SQL AS
-'select array_agg(md5(g::text))::text from generate_series(1, 256) g';
+'select array_agg(notmd5(g::text))::text from generate_series(1, 256) g';
 CREATE TABLE cmdata2 (f1 text COMPRESSION pglz);
 INSERT INTO cmdata2 SELECT large_val() || repeat('a', 4000);
 SELECT pg_column_compression(f1) FROM cmdata2;
@@ -135,7 +135,7 @@ SELECT pg_column_compression(f1) FROM cmdata;
 DROP TABLE cmdata2;
 CREATE TABLE cmdata2 (f1 TEXT COMPRESSION pglz, f2 TEXT COMPRESSION lz4);
 CREATE UNIQUE INDEX idx1 ON cmdata2 ((f1 || f2));
-INSERT INTO cmdata2 VALUES((SELECT array_agg(md5(g::TEXT))::TEXT FROM
+INSERT INTO cmdata2 VALUES((SELECT array_agg(notmd5(g::TEXT))::TEXT FROM
 generate_series(1, 50) g), VERSION());
 
 -- check data is ok
diff --git a/src/test/regress/sql/inherit.sql b/src/test/regress/sql/inherit.sql
index 5db6dbc191..211b45b9a6 100644
--- a/src/test/regress/sql/inherit.sql
+++ b/src/test/regress/sql/inherit.sql
@@ -920,7 +920,7 @@ alter table permtest_child attach partition permtest_grandchild for values in ('
 alter table permtest_parent attach partition permtest_child for values in (1);
 create index on permtest_parent (left(c, 3));
 insert into permtest_parent
-  select 1, 'a', left(md5(i::text), 5) from generate_series(0, 100) i;
+  select 1, 'a', left(notmd5(i::text), 5) from generate_series(0, 100) i;
 analyze permtest_parent;
 create role regress_no_child_access;
 revoke all on permtest_grandchild from regress_no_child_access;
diff --git a/src/test/regress/sql/largeobject.sql b/src/test/regress/sql/largeobject.sql
index 15e0dff7a3..ae45688ae6 100644
--- a/src/test/regress/sql/largeobject.sql
+++ b/src/test/regress/sql/largeobject.sql
@@ -244,7 +244,7 @@ TRUNCATE lotest_stash_values;
 SELECT lo_from_bytea(0, lo_get(:newloid_1)) AS newloid_2
 \gset
 
-SELECT md5(lo_get(:newloid_1)) = md5(lo_get(:newloid_2));
+SELECT notmd5(lo_get(:newloid_1)) = notmd5(lo_get(:newloid_2));
 
 SELECT lo_get(:newloid_1, 0, 20);
 SELECT lo_get(:newloid_1, 10, 20);
diff --git a/src/test/regress/sql/matview.sql b/src/test/regress/sql/matview.sql
index 68b9ccfd45..4c43899757 100644
--- a/src/test/regress/sql/matview.sql
+++ b/src/test/regress/sql/matview.sql
@@ -216,10 +216,10 @@ SET ROLE regress_user_mvtest;
 -- duplicate all the aliases used in those queries
 CREATE TABLE mvtest_foo_data AS SELECT i,
   i+1 AS tid,
-  md5(random()::text) AS mv,
-  md5(random()::text) AS newdata,
-  md5(random()::text) AS newdata2,
-  md5(random()::text) AS diff
+  notmd5(random()::text) AS mv,
+  notmd5(random()::text) AS newdata,
+  notmd5(random()::text) AS newdata2,
+  notmd5(random()::text) AS diff
   FROM generate_series(1, 10) i;
 CREATE MATERIALIZED VIEW mvtest_mv_foo AS SELECT * FROM mvtest_foo_data;
 CREATE MATERIALIZED VIEW mvtest_mv_foo AS SELECT * FROM mvtest_foo_data;
diff --git a/src/test/regress/sql/memoize.sql b/src/test/regress/sql/memoize.sql
index d66acaed85..4235c4223c 100644
--- a/src/test/regress/sql/memoize.sql
+++ b/src/test/regress/sql/memoize.sql
@@ -91,7 +91,7 @@ DROP TABLE flt;
 CREATE TABLE strtest (n name, t text);
 CREATE INDEX strtest_n_idx ON strtest (n);
 CREATE INDEX strtest_t_idx ON strtest (t);
-INSERT INTO strtest VALUES('one','one'),('two','two'),('three',repeat(md5('three'),100));
+INSERT INTO strtest VALUES('one','one'),('two','two'),('three',repeat(notmd5('three'),100));
 -- duplicate rows so we get some cache hits
 INSERT INTO strtest SELECT * FROM strtest;
 ANALYZE strtest;
diff --git a/src/test/regress/sql/plpgsql.sql b/src/test/regress/sql/plpgsql.sql
index 9a53b15081..58d73761ed 100644
--- a/src/test/regress/sql/plpgsql.sql
+++ b/src/test/regress/sql/plpgsql.sql
@@ -2877,7 +2877,7 @@ create type record_type as (x text, y int, z boolean);
 
 create or replace function ret_query2(lim int) returns setof record_type as $$
 begin
-    return query select md5(s.x::text), s.x, s.x > 0
+    return query select notmd5(s.x::text), s.x, s.x > 0
                  from generate_series(-8, lim) s (x) where s.x % 2 = 0;
 end;
 $$ language plpgsql;
diff --git a/src/test/regress/sql/rowsecurity.sql b/src/test/regress/sql/rowsecurity.sql
index b38fa8ed8f..ce5cf40640 100644
--- a/src/test/regress/sql/rowsecurity.sql
+++ b/src/test/regress/sql/rowsecurity.sql
@@ -534,10 +534,10 @@ SELECT * FROM rec1;    -- fail, mutual recursion via s.b. views
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
 CREATE TABLE s1 (a int, b text);
-INSERT INTO s1 (SELECT x, md5(x::text) FROM generate_series(-10,10) x);
+INSERT INTO s1 (SELECT x, public.notmd5(x::text) FROM generate_series(-10,10) x);
 
 CREATE TABLE s2 (x int, y text);
-INSERT INTO s2 (SELECT x, md5(x::text) FROM generate_series(-6,6) x);
+INSERT INTO s2 (SELECT x, public.notmd5(x::text) FROM generate_series(-6,6) x);
 
 GRANT SELECT ON s1, s2 TO regress_rls_bob;
 
@@ -669,7 +669,7 @@ DELETE FROM t1 WHERE f_leak(b) RETURNING tableoid::regclass, *, t1;
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
 CREATE TABLE b1 (a int, b text);
-INSERT INTO b1 (SELECT x, md5(x::text) FROM generate_series(-10,10) x);
+INSERT INTO b1 (SELECT x, public.notmd5(x::text) FROM generate_series(-10,10) x);
 
 CREATE POLICY p1 ON b1 USING (a % 2 = 0);
 ALTER TABLE b1 ENABLE ROW LEVEL SECURITY;
@@ -1269,7 +1269,7 @@ DROP VIEW rls_sbv;
 -- Expression structure
 --
 SET SESSION AUTHORIZATION regress_rls_alice;
-INSERT INTO y2 (SELECT x, md5(x::text) FROM generate_series(0,20) x);
+INSERT INTO y2 (SELECT x, public.notmd5(x::text) FROM generate_series(0,20) x);
 CREATE POLICY p2 ON y2 USING (a % 3 = 0);
 CREATE POLICY p3 ON y2 USING (a % 4 = 0);
 
@@ -1341,7 +1341,7 @@ ALTER TABLE t1 ENABLE ROW LEVEL SECURITY;
 
 GRANT ALL ON t1 TO regress_rls_bob;
 
-INSERT INTO t1 (SELECT x, md5(x::text) FROM generate_series(0,20) x);
+INSERT INTO t1 (SELECT x, public.notmd5(x::text) FROM generate_series(0,20) x);
 
 SET SESSION AUTHORIZATION regress_rls_bob;
 
@@ -1473,7 +1473,7 @@ ALTER TABLE copy_t ENABLE ROW LEVEL SECURITY;
 
 GRANT ALL ON copy_t TO regress_rls_bob, regress_rls_exempt_user;
 
-INSERT INTO copy_t (SELECT x, md5(x::text) FROM generate_series(0,10) x);
+INSERT INTO copy_t (SELECT x, public.notmd5(x::text) FROM generate_series(0,10) x);
 
 -- Check COPY TO as Superuser/owner.
 RESET SESSION AUTHORIZATION;
@@ -1513,7 +1513,7 @@ ALTER TABLE copy_rel_to ENABLE ROW LEVEL SECURITY;
 
 GRANT ALL ON copy_rel_to TO regress_rls_bob, regress_rls_exempt_user;
 
-INSERT INTO copy_rel_to VALUES (1, md5('1'));
+INSERT INTO copy_rel_to VALUES (1, public.notmd5('1'));
 
 -- Check COPY TO as Superuser/owner.
 RESET SESSION AUTHORIZATION;
diff --git a/src/test/regress/sql/stats_ext.sql b/src/test/regress/sql/stats_ext.sql
index d0d42cd013..b27e9c683a 100644
--- a/src/test/regress/sql/stats_ext.sql
+++ b/src/test/regress/sql/stats_ext.sql
@@ -1283,25 +1283,25 @@ WITH (autovacuum_enabled = off);
 
 INSERT INTO mcv_lists_uuid (a, b, c)
      SELECT
-         md5(mod(i,100)::text)::uuid,
-         md5(mod(i,50)::text)::uuid,
-         md5(mod(i,25)::text)::uuid
+         notmd5(mod(i,100)::text)::uuid,
+         notmd5(mod(i,50)::text)::uuid,
+         notmd5(mod(i,25)::text)::uuid
      FROM generate_series(1,5000) s(i);
 
 ANALYZE mcv_lists_uuid;
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND c = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND c = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
 
 CREATE STATISTICS mcv_lists_uuid_stats (mcv) ON a, b, c
   FROM mcv_lists_uuid;
 
 ANALYZE mcv_lists_uuid;
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
 
-SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND b = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc'' AND c = ''1679091c-5a88-0faf-6fb5-e6087eb1b2dc''');
+SELECT * FROM check_estimated_rows('SELECT * FROM mcv_lists_uuid WHERE a = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND b = ''e7f6c011-776e-8db7-cd33-0b54174fd76f'' AND c = ''e7f6c011-776e-8db7-cd33-0b54174fd76f''');
 
 DROP TABLE mcv_lists_uuid;
 
@@ -1315,7 +1315,7 @@ WITH (autovacuum_enabled = off);
 
 INSERT INTO mcv_lists_arrays (a, b, c)
      SELECT
-         ARRAY[md5((i/100)::text), md5((i/100-1)::text), md5((i/100+1)::text)],
+         ARRAY[notmd5((i/100)::text), notmd5((i/100-1)::text), notmd5((i/100+1)::text)],
          ARRAY[(i/100-1)::numeric/1000, (i/100)::numeric/1000, (i/100+1)::numeric/1000],
          ARRAY[(i/100-1), i/100, (i/100+1)]
      FROM generate_series(1,5000) s(i);
@@ -1515,7 +1515,7 @@ DROP TABLE expr_stats;
 
 -- statistics on expressions with different data types
 CREATE TABLE expr_stats (a int, b name, c text);
-INSERT INTO expr_stats SELECT mod(i,10), md5(mod(i,10)::text), md5(mod(i,10)::text) FROM generate_series(1,1000) s(i);
+INSERT INTO expr_stats SELECT mod(i,10), notmd5(mod(i,10)::text), notmd5(mod(i,10)::text) FROM generate_series(1,1000) s(i);
 ANALYZE expr_stats;
 
 SELECT * FROM check_estimated_rows('SELECT * FROM expr_stats WHERE a = 0 AND (b || c) <= ''z'' AND (c || b) >= ''0''');
diff --git a/src/test/regress/sql/test_setup.sql b/src/test/regress/sql/test_setup.sql
index 8439b38d21..dfb06d4b2e 100644
--- a/src/test/regress/sql/test_setup.sql
+++ b/src/test/regress/sql/test_setup.sql
@@ -284,3 +284,18 @@ create function part_hashtext_length(value text, seed int8)
 create operator class part_test_text_ops for type text using hash as
     operator 1 =,
     function 2 part_hashtext_length(text, int8);
+
+--
+-- These functions are used in tests that used to use md5(), which we now
+-- mostly avoid so that the tests will pass in FIPS mode.
+--
+
+create function notmd5(bytea)
+    returns text
+    strict immutable parallel safe leakproof
+    begin atomic; select substr(encode(sha256($1), 'hex'), 1, 32); end;
+
+create function notmd5(text)
+    returns text
+    strict immutable parallel safe leakproof
+    begin atomic; select substr(encode(sha256($1::bytea), 'hex'), 1, 32); end;