Add more tests for relation statistics with rewrites

While there are many tests related to relation rewrites, nothing existed
to check how the cumulative statistics behave in such cases for
relations.

A different patch is under discussion to move the relation statistics to
be tracked on a per-relfilenode basis, so as these could be rebuilt
during crash recovery.  This commit gives us a way to check (and perhaps
change) the existing behaviors for several rewrite scenarios, mixing
transactions, sub-transactions, two-phase commit and VACUUM.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aQ3X20hbqoThQXgp@ip-10-97-1-34.eu-west-3.compute.internal

src/test/regress/expected/stats_rewrite.out

@@ -0,0 +1,355 @@
+--
+-- Test cumulative statistics with relation rewrites
+--
+-- Two-phase commit.
+-- Table-level stats with VACUUM and rewrite after 2PC commit.
+CREATE TABLE test_2pc_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_2pc_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp' \gset
+BEGIN;
+ALTER TABLE test_2pc_timestamp ALTER COLUMN a TYPE int;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp';
+ same_vacuum_ts 
+----------------
+ t
+(1 row)
+
+DROP TABLE test_2pc_timestamp;
+-- Table-level stats with single rewrite after 2PC commit.
+CREATE TABLE test_2pc_rewrite_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_2pc_rewrite_alone;
+-- Table-level stats with rewrite and DMLs after 2PC commit.
+CREATE TABLE test_2pc (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc VALUES (1);
+BEGIN;
+INSERT INTO test_2pc VALUES (1);
+INSERT INTO test_2pc VALUES (2);
+INSERT INTO test_2pc VALUES (3);
+ALTER TABLE test_2pc ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          4 |          0
+(1 row)
+
+DROP TABLE test_2pc;
+-- Table-level stats with multiple rewrites after 2PC commit.
+CREATE TABLE test_2pc_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_multi VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_multi VALUES (1);
+INSERT INTO test_2pc_multi VALUES (2);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_multi VALUES (3);
+INSERT INTO test_2pc_multi VALUES (4);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_2pc_multi VALUES (5);
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_multi';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          6 |          0
+(1 row)
+
+DROP TABLE test_2pc_multi;
+-- Table-level stats with single rewrite after 2PC abort.
+CREATE TABLE test_2pc_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+ROLLBACK PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_2pc_rewrite_alone_abort;
+-- Table-level stats with rewrite and DMLs after 2PC abort.
+CREATE TABLE test_2pc_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_abort VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_abort VALUES (1);
+INSERT INTO test_2pc_abort VALUES (2);
+ALTER TABLE test_2pc_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_abort VALUES (3);
+PREPARE TRANSACTION 'test';
+ROLLBACK PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          1 |          3
+(1 row)
+
+DROP TABLE test_2pc_abort;
+-- Table-level stats with rewrites and subtransactions after 2PC commit.
+CREATE TABLE test_2pc_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_2pc_savepoint VALUES (1);
+INSERT INTO test_2pc_savepoint VALUES (2);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_2pc_savepoint VALUES (3);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_2pc_savepoint VALUES (4);
+INSERT INTO test_2pc_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_savepoint';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          3 |          3
+(1 row)
+
+DROP TABLE test_2pc_savepoint;
+-- Table-level stats with single rewrite and VACUUM
+CREATE TABLE test_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp' \gset
+ALTER TABLE test_timestamp ALTER COLUMN a TYPE bigint;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp';
+ same_vacuum_ts 
+----------------
+ t
+(1 row)
+
+DROP TABLE test_timestamp;
+-- Table-level stats with single rewrite.
+CREATE TABLE test_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_alone ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_alone';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_alone;
+-- Table-level stats with rewrite and DMLs.
+CREATE TABLE test (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test VALUES (1);
+BEGIN;
+INSERT INTO test VALUES (1);
+INSERT INTO test VALUES (2);
+INSERT INTO test VALUES (3);
+ALTER TABLE test ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          4 |          0
+(1 row)
+
+DROP TABLE test;
+-- Table-level stats with multiple rewrites and DMLs.
+CREATE TABLE test_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_multi VALUES (1);
+BEGIN;
+INSERT INTO test_multi VALUES (1);
+INSERT INTO test_multi VALUES (2);
+ALTER TABLE test_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_multi VALUES (3);
+INSERT INTO test_multi VALUES (4);
+ALTER TABLE test_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_multi VALUES (5);
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_multi';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          6 |          0
+(1 row)
+
+DROP TABLE test_multi;
+-- Table-level stats with rewrite and rollback.
+CREATE TABLE test_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_rewrite_alone_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_rewrite_alone_abort;
+-- Table-level stats with rewrite, DMLs and rollback.
+CREATE TABLE test_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_abort VALUES (1);
+BEGIN;
+INSERT INTO test_abort VALUES (1);
+INSERT INTO test_abort VALUES (2);
+ALTER TABLE test_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_abort VALUES (3);
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          1 |          3
+(1 row)
+
+DROP TABLE test_abort;
+-- Table-level stats with rewrites and subtransactions.
+CREATE TABLE test_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_savepoint VALUES (1);
+INSERT INTO test_savepoint VALUES (2);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_savepoint VALUES (3);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_savepoint VALUES (4);
+INSERT INTO test_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_savepoint';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          3 |          3
+(1 row)
+
+DROP TABLE test_savepoint;
+-- Table-level stats with tablespace rewrite.
+CREATE TABLE test_tbs (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_tbs VALUES (1);
+ALTER TABLE test_tbs SET TABLESPACE pg_default;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_tbs';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_tbs;

src/test/regress/expected/stats_rewrite_1.out

@@ -0,0 +1,376 @@
+--
+-- Test cumulative statistics with relation rewrites
+--
+-- Two-phase commit.
+-- Table-level stats with VACUUM and rewrite after 2PC commit.
+CREATE TABLE test_2pc_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_2pc_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp' \gset
+BEGIN;
+ALTER TABLE test_2pc_timestamp ALTER COLUMN a TYPE int;
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+COMMIT PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp';
+ same_vacuum_ts 
+----------------
+ t
+(1 row)
+
+DROP TABLE test_2pc_timestamp;
+-- Table-level stats with single rewrite after 2PC commit.
+CREATE TABLE test_2pc_rewrite_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+COMMIT PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_2pc_rewrite_alone;
+-- Table-level stats with rewrite and DMLs after 2PC commit.
+CREATE TABLE test_2pc (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc VALUES (1);
+BEGIN;
+INSERT INTO test_2pc VALUES (1);
+INSERT INTO test_2pc VALUES (2);
+INSERT INTO test_2pc VALUES (3);
+ALTER TABLE test_2pc ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+COMMIT PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          1 |          3
+(1 row)
+
+DROP TABLE test_2pc;
+-- Table-level stats with multiple rewrites after 2PC commit.
+CREATE TABLE test_2pc_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_multi VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_multi VALUES (1);
+INSERT INTO test_2pc_multi VALUES (2);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_multi VALUES (3);
+INSERT INTO test_2pc_multi VALUES (4);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_2pc_multi VALUES (5);
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+COMMIT PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_multi';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          1 |          5
+(1 row)
+
+DROP TABLE test_2pc_multi;
+-- Table-level stats with single rewrite after 2PC abort.
+CREATE TABLE test_2pc_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+ROLLBACK PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_2pc_rewrite_alone_abort;
+-- Table-level stats with rewrite and DMLs after 2PC abort.
+CREATE TABLE test_2pc_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_abort VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_abort VALUES (1);
+INSERT INTO test_2pc_abort VALUES (2);
+ALTER TABLE test_2pc_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_abort VALUES (3);
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+ROLLBACK PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          1 |          3
+(1 row)
+
+DROP TABLE test_2pc_abort;
+-- Table-level stats with rewrites and subtransactions after 2PC commit.
+CREATE TABLE test_2pc_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_2pc_savepoint VALUES (1);
+INSERT INTO test_2pc_savepoint VALUES (2);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_2pc_savepoint VALUES (3);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_2pc_savepoint VALUES (4);
+INSERT INTO test_2pc_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+PREPARE TRANSACTION 'test';
+ERROR:  prepared transactions are disabled
+HINT:  Set "max_prepared_transactions" to a nonzero value.
+COMMIT PREPARED 'test';
+ERROR:  prepared transaction with identifier "test" does not exist
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_savepoint';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          1 |          5
+(1 row)
+
+DROP TABLE test_2pc_savepoint;
+-- Table-level stats with single rewrite and VACUUM
+CREATE TABLE test_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp' \gset
+ALTER TABLE test_timestamp ALTER COLUMN a TYPE bigint;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp';
+ same_vacuum_ts 
+----------------
+ t
+(1 row)
+
+DROP TABLE test_timestamp;
+-- Table-level stats with single rewrite.
+CREATE TABLE test_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_alone ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_alone';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_alone;
+-- Table-level stats with rewrite and DMLs.
+CREATE TABLE test (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test VALUES (1);
+BEGIN;
+INSERT INTO test VALUES (1);
+INSERT INTO test VALUES (2);
+INSERT INTO test VALUES (3);
+ALTER TABLE test ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          4 |          0
+(1 row)
+
+DROP TABLE test;
+-- Table-level stats with multiple rewrites and DMLs.
+CREATE TABLE test_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_multi VALUES (1);
+BEGIN;
+INSERT INTO test_multi VALUES (1);
+INSERT INTO test_multi VALUES (2);
+ALTER TABLE test_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_multi VALUES (3);
+INSERT INTO test_multi VALUES (4);
+ALTER TABLE test_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_multi VALUES (5);
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_multi';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          6 |          0
+(1 row)
+
+DROP TABLE test_multi;
+-- Table-level stats with rewrite and rollback.
+CREATE TABLE test_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_rewrite_alone_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_rewrite_alone_abort;
+-- Table-level stats with rewrite, DMLs and rollback.
+CREATE TABLE test_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_abort VALUES (1);
+BEGIN;
+INSERT INTO test_abort VALUES (1);
+INSERT INTO test_abort VALUES (2);
+ALTER TABLE test_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_abort VALUES (3);
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_abort';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         4 |          1 |          3
+(1 row)
+
+DROP TABLE test_abort;
+-- Table-level stats with rewrites and subtransactions.
+CREATE TABLE test_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_savepoint VALUES (1);
+INSERT INTO test_savepoint VALUES (2);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_savepoint VALUES (3);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_savepoint VALUES (4);
+INSERT INTO test_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_savepoint';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         6 |          3 |          3
+(1 row)
+
+DROP TABLE test_savepoint;
+-- Table-level stats with tablespace rewrite.
+CREATE TABLE test_tbs (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_tbs VALUES (1);
+ALTER TABLE test_tbs SET TABLESPACE pg_default;
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush 
+--------------------------
+ 
+(1 row)
+
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_tbs';
+ n_tup_ins | n_live_tup | n_dead_tup 
+-----------+------------+------------
+         1 |          1 |          0
+(1 row)
+
+DROP TABLE test_tbs;

src/test/regress/parallel_schedule

@@ -102,7 +102,7 @@ test: publication subscription
 # Another group of parallel tests
 # select_views depends on create_view
 # ----------
-test: select_views portals_p2 foreign_key cluster dependency guc bitmapops combocid tsearch tsdicts foreign_data window xmlmap functional_deps advisory_lock indirect_toast equivclass
+test: select_views portals_p2 foreign_key cluster dependency guc bitmapops combocid tsearch tsdicts foreign_data window xmlmap functional_deps advisory_lock indirect_toast equivclass stats_rewrite
 
 # ----------
 # Another group of parallel tests (JSON related)

src/test/regress/sql/stats_rewrite.sql

@@ -0,0 +1,220 @@
+--
+-- Test cumulative statistics with relation rewrites
+--
+
+-- Two-phase commit.
+-- Table-level stats with VACUUM and rewrite after 2PC commit.
+CREATE TABLE test_2pc_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_2pc_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp' \gset
+BEGIN;
+ALTER TABLE test_2pc_timestamp ALTER COLUMN a TYPE int;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_timestamp';
+DROP TABLE test_2pc_timestamp;
+
+-- Table-level stats with single rewrite after 2PC commit.
+CREATE TABLE test_2pc_rewrite_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone';
+DROP TABLE test_2pc_rewrite_alone;
+
+-- Table-level stats with rewrite and DMLs after 2PC commit.
+CREATE TABLE test_2pc (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc VALUES (1);
+BEGIN;
+INSERT INTO test_2pc VALUES (1);
+INSERT INTO test_2pc VALUES (2);
+INSERT INTO test_2pc VALUES (3);
+ALTER TABLE test_2pc ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc';
+DROP TABLE test_2pc;
+
+-- Table-level stats with multiple rewrites after 2PC commit.
+CREATE TABLE test_2pc_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_multi VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_multi VALUES (1);
+INSERT INTO test_2pc_multi VALUES (2);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_multi VALUES (3);
+INSERT INTO test_2pc_multi VALUES (4);
+ALTER TABLE test_2pc_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_2pc_multi VALUES (5);
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_multi';
+DROP TABLE test_2pc_multi;
+
+-- Table-level stats with single rewrite after 2PC abort.
+CREATE TABLE test_2pc_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_2pc_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+PREPARE TRANSACTION 'test';
+ROLLBACK PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_rewrite_alone_abort';
+DROP TABLE test_2pc_rewrite_alone_abort;
+
+-- Table-level stats with rewrite and DMLs after 2PC abort.
+CREATE TABLE test_2pc_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_abort VALUES (1);
+BEGIN;
+INSERT INTO test_2pc_abort VALUES (1);
+INSERT INTO test_2pc_abort VALUES (2);
+ALTER TABLE test_2pc_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_2pc_abort VALUES (3);
+PREPARE TRANSACTION 'test';
+ROLLBACK PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_abort';
+DROP TABLE test_2pc_abort;
+
+-- Table-level stats with rewrites and subtransactions after 2PC commit.
+CREATE TABLE test_2pc_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_2pc_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_2pc_savepoint VALUES (1);
+INSERT INTO test_2pc_savepoint VALUES (2);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_2pc_savepoint VALUES (3);
+ALTER TABLE test_2pc_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_2pc_savepoint VALUES (4);
+INSERT INTO test_2pc_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+PREPARE TRANSACTION 'test';
+COMMIT PREPARED 'test';
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_2pc_savepoint';
+DROP TABLE test_2pc_savepoint;
+
+-- Table-level stats with single rewrite and VACUUM
+CREATE TABLE test_timestamp (a int) WITH (autovacuum_enabled = false);
+VACUUM ANALYZE test_timestamp;
+SELECT last_analyze AS last_vacuum_analyze
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp' \gset
+ALTER TABLE test_timestamp ALTER COLUMN a TYPE bigint;
+SELECT pg_stat_force_next_flush();
+SELECT last_analyze = :'last_vacuum_analyze'::timestamptz AS same_vacuum_ts
+  FROM pg_stat_all_tables WHERE relname = 'test_timestamp';
+DROP TABLE test_timestamp;
+
+-- Table-level stats with single rewrite.
+CREATE TABLE test_alone (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_alone VALUES (1);
+BEGIN;
+ALTER TABLE test_alone ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_alone';
+DROP TABLE test_alone;
+
+-- Table-level stats with rewrite and DMLs.
+CREATE TABLE test (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test VALUES (1);
+BEGIN;
+INSERT INTO test VALUES (1);
+INSERT INTO test VALUES (2);
+INSERT INTO test VALUES (3);
+ALTER TABLE test ALTER COLUMN a TYPE bigint;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test';
+DROP TABLE test;
+
+-- Table-level stats with multiple rewrites and DMLs.
+CREATE TABLE test_multi (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_multi VALUES (1);
+BEGIN;
+INSERT INTO test_multi VALUES (1);
+INSERT INTO test_multi VALUES (2);
+ALTER TABLE test_multi ALTER COLUMN a TYPE bigint;
+INSERT INTO test_multi VALUES (3);
+INSERT INTO test_multi VALUES (4);
+ALTER TABLE test_multi ALTER COLUMN a TYPE int;
+INSERT INTO test_multi VALUES (5);
+COMMIT;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_multi';
+DROP TABLE test_multi;
+
+-- Table-level stats with rewrite and rollback.
+CREATE TABLE test_rewrite_alone_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_rewrite_alone_abort VALUES (1);
+BEGIN;
+ALTER TABLE test_rewrite_alone_abort ALTER COLUMN a TYPE bigint;
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_rewrite_alone_abort';
+DROP TABLE test_rewrite_alone_abort;
+
+-- Table-level stats with rewrite, DMLs and rollback.
+CREATE TABLE test_abort (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_abort VALUES (1);
+BEGIN;
+INSERT INTO test_abort VALUES (1);
+INSERT INTO test_abort VALUES (2);
+ALTER TABLE test_abort ALTER COLUMN a TYPE bigint;
+INSERT INTO test_abort VALUES (3);
+ROLLBACK;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_abort';
+DROP TABLE test_abort;
+
+-- Table-level stats with rewrites and subtransactions.
+CREATE TABLE test_savepoint (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_savepoint VALUES (1);
+BEGIN;
+SAVEPOINT a;
+INSERT INTO test_savepoint VALUES (1);
+INSERT INTO test_savepoint VALUES (2);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE bigint;
+SAVEPOINT b;
+INSERT INTO test_savepoint VALUES (3);
+ALTER TABLE test_savepoint ALTER COLUMN a TYPE int;
+SAVEPOINT c;
+INSERT INTO test_savepoint VALUES (4);
+INSERT INTO test_savepoint VALUES (5);
+ROLLBACK TO SAVEPOINT b;
+COMMIT;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_savepoint';
+DROP TABLE test_savepoint;
+
+-- Table-level stats with tablespace rewrite.
+CREATE TABLE test_tbs (a int) WITH (autovacuum_enabled = false);
+INSERT INTO test_tbs VALUES (1);
+ALTER TABLE test_tbs SET TABLESPACE pg_default;
+SELECT pg_stat_force_next_flush();
+SELECT n_tup_ins, n_live_tup, n_dead_tup
+  FROM pg_stat_all_tables WHERE relname = 'test_tbs';
+DROP TABLE test_tbs;