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-rw-r--r--src/test/regress/expected/rules.out9
-rw-r--r--src/test/regress/expected/stats.out202
-rw-r--r--src/test/regress/sql/stats.sql86
3 files changed, 297 insertions, 0 deletions
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out
index 9dd137415e8..bfcd8ac9a06 100644
--- a/src/test/regress/expected/rules.out
+++ b/src/test/regress/expected/rules.out
@@ -1763,6 +1763,7 @@ pg_stat_all_indexes| SELECT c.oid AS relid,
c.relname,
i.relname AS indexrelname,
pg_stat_get_numscans(i.oid) AS idx_scan,
+ pg_stat_get_lastscan(i.oid) AS last_idx_scan,
pg_stat_get_tuples_returned(i.oid) AS idx_tup_read,
pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch
FROM (((pg_class c
@@ -1774,8 +1775,10 @@ pg_stat_all_tables| SELECT c.oid AS relid,
n.nspname AS schemaname,
c.relname,
pg_stat_get_numscans(c.oid) AS seq_scan,
+ pg_stat_get_lastscan(c.oid) AS last_seq_scan,
pg_stat_get_tuples_returned(c.oid) AS seq_tup_read,
(sum(pg_stat_get_numscans(i.indexrelid)))::bigint AS idx_scan,
+ max(pg_stat_get_lastscan(i.indexrelid)) AS last_idx_scan,
((sum(pg_stat_get_tuples_fetched(i.indexrelid)))::bigint + pg_stat_get_tuples_fetched(c.oid)) AS idx_tup_fetch,
pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins,
pg_stat_get_tuples_updated(c.oid) AS n_tup_upd,
@@ -2107,6 +2110,7 @@ pg_stat_sys_indexes| SELECT pg_stat_all_indexes.relid,
pg_stat_all_indexes.relname,
pg_stat_all_indexes.indexrelname,
pg_stat_all_indexes.idx_scan,
+ pg_stat_all_indexes.last_idx_scan,
pg_stat_all_indexes.idx_tup_read,
pg_stat_all_indexes.idx_tup_fetch
FROM pg_stat_all_indexes
@@ -2115,8 +2119,10 @@ pg_stat_sys_tables| SELECT pg_stat_all_tables.relid,
pg_stat_all_tables.schemaname,
pg_stat_all_tables.relname,
pg_stat_all_tables.seq_scan,
+ pg_stat_all_tables.last_seq_scan,
pg_stat_all_tables.seq_tup_read,
pg_stat_all_tables.idx_scan,
+ pg_stat_all_tables.last_idx_scan,
pg_stat_all_tables.idx_tup_fetch,
pg_stat_all_tables.n_tup_ins,
pg_stat_all_tables.n_tup_upd,
@@ -2151,6 +2157,7 @@ pg_stat_user_indexes| SELECT pg_stat_all_indexes.relid,
pg_stat_all_indexes.relname,
pg_stat_all_indexes.indexrelname,
pg_stat_all_indexes.idx_scan,
+ pg_stat_all_indexes.last_idx_scan,
pg_stat_all_indexes.idx_tup_read,
pg_stat_all_indexes.idx_tup_fetch
FROM pg_stat_all_indexes
@@ -2159,8 +2166,10 @@ pg_stat_user_tables| SELECT pg_stat_all_tables.relid,
pg_stat_all_tables.schemaname,
pg_stat_all_tables.relname,
pg_stat_all_tables.seq_scan,
+ pg_stat_all_tables.last_seq_scan,
pg_stat_all_tables.seq_tup_read,
pg_stat_all_tables.idx_scan,
+ pg_stat_all_tables.last_idx_scan,
pg_stat_all_tables.idx_tup_fetch,
pg_stat_all_tables.n_tup_ins,
pg_stat_all_tables.n_tup_upd,
diff --git a/src/test/regress/expected/stats.out b/src/test/regress/expected/stats.out
index f701da20697..257a6a9da9a 100644
--- a/src/test/regress/expected/stats.out
+++ b/src/test/regress/expected/stats.out
@@ -557,6 +557,208 @@ SELECT pg_stat_get_live_tuples(:drop_stats_test_subxact_oid);
DROP TABLE trunc_stats_test, trunc_stats_test1, trunc_stats_test2, trunc_stats_test3, trunc_stats_test4;
DROP TABLE prevstats;
-----
+-- Test that last_seq_scan, last_idx_scan are correctly maintained
+--
+-- Perform test using a temporary table. That way autovacuum etc won't
+-- interfere. To be able to check that timestamps increase, we sleep for 100ms
+-- between tests, assuming that there aren't systems with a coarser timestamp
+-- granularity.
+-----
+BEGIN;
+CREATE TEMPORARY TABLE test_last_scan(idx_col int primary key, noidx_col int);
+INSERT INTO test_last_scan(idx_col, noidx_col) VALUES(1, 1);
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush
+--------------------------
+
+(1 row)
+
+COMMIT;
+SELECT pg_stat_reset_single_table_counters('test_last_scan'::regclass);
+ pg_stat_reset_single_table_counters
+-------------------------------------
+
+(1 row)
+
+SELECT seq_scan, idx_scan FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+ seq_scan | idx_scan
+----------+----------
+ 0 | 0
+(1 row)
+
+-- ensure we start out with exactly one index and sequential scan
+BEGIN;
+SET LOCAL enable_seqscan TO on;
+SET LOCAL enable_indexscan TO on;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+ QUERY PLAN
+----------------------------------
+ Aggregate
+ -> Seq Scan on test_last_scan
+ Filter: (noidx_col = 1)
+(3 rows)
+
+SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+ count
+-------
+ 1
+(1 row)
+
+SET LOCAL enable_seqscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ QUERY PLAN
+--------------------------------------------------------------
+ Aggregate
+ -> Index Scan using test_last_scan_pkey on test_last_scan
+ Index Cond: (idx_col = 1)
+(3 rows)
+
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ count
+-------
+ 1
+(1 row)
+
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush
+--------------------------
+
+(1 row)
+
+COMMIT;
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1); -- assume a minimum timestamp granularity of 100ms
+ pg_sleep
+----------
+
+(1 row)
+
+-- cause one sequential scan
+BEGIN;
+SET LOCAL enable_seqscan TO on;
+SET LOCAL enable_indexscan TO off;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+ QUERY PLAN
+----------------------------------
+ Aggregate
+ -> Seq Scan on test_last_scan
+ Filter: (noidx_col = 1)
+(3 rows)
+
+SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+ count
+-------
+ 1
+(1 row)
+
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush
+--------------------------
+
+(1 row)
+
+COMMIT;
+-- check that just sequential scan stats were incremented
+SELECT seq_scan, :'test_last_seq' < last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' = last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+ seq_scan | seq_ok | idx_scan | idx_ok
+----------+--------+----------+--------
+ 2 | t | 1 | t
+(1 row)
+
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1);
+ pg_sleep
+----------
+
+(1 row)
+
+-- cause one index scan
+BEGIN;
+SET LOCAL enable_seqscan TO off;
+SET LOCAL enable_indexscan TO on;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ QUERY PLAN
+--------------------------------------------------------------
+ Aggregate
+ -> Index Scan using test_last_scan_pkey on test_last_scan
+ Index Cond: (idx_col = 1)
+(3 rows)
+
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ count
+-------
+ 1
+(1 row)
+
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush
+--------------------------
+
+(1 row)
+
+COMMIT;
+-- check that just index scan stats were incremented
+SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+ seq_scan | seq_ok | idx_scan | idx_ok
+----------+--------+----------+--------
+ 2 | t | 2 | t
+(1 row)
+
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1);
+ pg_sleep
+----------
+
+(1 row)
+
+-- cause one bitmap index scan
+BEGIN;
+SET LOCAL enable_seqscan TO off;
+SET LOCAL enable_indexscan TO off;
+SET LOCAL enable_bitmapscan TO on;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ QUERY PLAN
+------------------------------------------------------
+ Aggregate
+ -> Bitmap Heap Scan on test_last_scan
+ Recheck Cond: (idx_col = 1)
+ -> Bitmap Index Scan on test_last_scan_pkey
+ Index Cond: (idx_col = 1)
+(5 rows)
+
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+ count
+-------
+ 1
+(1 row)
+
+SELECT pg_stat_force_next_flush();
+ pg_stat_force_next_flush
+--------------------------
+
+(1 row)
+
+COMMIT;
+-- check that just index scan stats were incremented
+SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+ seq_scan | seq_ok | idx_scan | idx_ok
+----------+--------+----------+--------
+ 2 | t | 3 | t
+(1 row)
+
+-----
-- Test that various stats views are being properly populated
-----
-- Test that sessions is incremented when a new session is started in pg_stat_database
diff --git a/src/test/regress/sql/stats.sql b/src/test/regress/sql/stats.sql
index eb081f65a42..f6270f7badb 100644
--- a/src/test/regress/sql/stats.sql
+++ b/src/test/regress/sql/stats.sql
@@ -291,6 +291,92 @@ DROP TABLE prevstats;
-----
+-- Test that last_seq_scan, last_idx_scan are correctly maintained
+--
+-- Perform test using a temporary table. That way autovacuum etc won't
+-- interfere. To be able to check that timestamps increase, we sleep for 100ms
+-- between tests, assuming that there aren't systems with a coarser timestamp
+-- granularity.
+-----
+
+BEGIN;
+CREATE TEMPORARY TABLE test_last_scan(idx_col int primary key, noidx_col int);
+INSERT INTO test_last_scan(idx_col, noidx_col) VALUES(1, 1);
+SELECT pg_stat_force_next_flush();
+COMMIT;
+
+SELECT pg_stat_reset_single_table_counters('test_last_scan'::regclass);
+SELECT seq_scan, idx_scan FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+
+-- ensure we start out with exactly one index and sequential scan
+BEGIN;
+SET LOCAL enable_seqscan TO on;
+SET LOCAL enable_indexscan TO on;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+SET LOCAL enable_seqscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT pg_stat_force_next_flush();
+COMMIT;
+
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1); -- assume a minimum timestamp granularity of 100ms
+
+-- cause one sequential scan
+BEGIN;
+SET LOCAL enable_seqscan TO on;
+SET LOCAL enable_indexscan TO off;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+SELECT count(*) FROM test_last_scan WHERE noidx_col = 1;
+SELECT pg_stat_force_next_flush();
+COMMIT;
+-- check that just sequential scan stats were incremented
+SELECT seq_scan, :'test_last_seq' < last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' = last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1);
+
+-- cause one index scan
+BEGIN;
+SET LOCAL enable_seqscan TO off;
+SET LOCAL enable_indexscan TO on;
+SET LOCAL enable_bitmapscan TO off;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT pg_stat_force_next_flush();
+COMMIT;
+-- check that just index scan stats were incremented
+SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+
+-- fetch timestamps from before the next test
+SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset
+SELECT pg_sleep(0.1);
+
+-- cause one bitmap index scan
+BEGIN;
+SET LOCAL enable_seqscan TO off;
+SET LOCAL enable_indexscan TO off;
+SET LOCAL enable_bitmapscan TO on;
+EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT count(*) FROM test_last_scan WHERE idx_col = 1;
+SELECT pg_stat_force_next_flush();
+COMMIT;
+-- check that just index scan stats were incremented
+SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok
+FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass;
+
+
+-----
-- Test that various stats views are being properly populated
-----
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-22 04:45:44 +0000