contrib/pg_stat_statements/expected/select.out - master - githubmirror/postgres

contrib/pg_stat_statements/expected/select.out
890 строк19 KB
Michael Paquier
Fix query jumbling with GROUP BY clauses
14 янв 2026, 02:44
14 янв 2026, 02:44e217dc7
--
-- SELECT statements
--
CREATE EXTENSION pg_stat_statements;
SET pg_stat_statements.track_utility = FALSE;
SET pg_stat_statements.track_planning = TRUE;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

--
-- simple and compound statements
--
SELECT 1 AS "int";
 int 
-----
   1
(1 row)

-- LIMIT and OFFSET patterns
-- Try some query permutations which once produced identical query IDs
SELECT 1 AS "int" LIMIT 1;
 int 
-----
   1
(1 row)

SELECT 1 AS "int" LIMIT 2;
 int 
-----
   1
(1 row)

SELECT 1 AS "int" OFFSET 1;
 int 
-----
(0 rows)

SELECT 1 AS "int" OFFSET 2;
 int 
-----
(0 rows)

SELECT 1 AS "int" OFFSET 1 LIMIT 1;
 int 
-----
(0 rows)

SELECT 1 AS "int" OFFSET 2 LIMIT 2;
 int 
-----
(0 rows)

SELECT 1 AS "int" LIMIT 1 OFFSET 1;
 int 
-----
(0 rows)

SELECT 1 AS "int" LIMIT 3 OFFSET 3;
 int 
-----
(0 rows)

SELECT 1 AS "int" OFFSET 1 FETCH FIRST 2 ROW ONLY;
 int 
-----
(0 rows)

SELECT 1 AS "int" OFFSET 2 FETCH FIRST 3 ROW ONLY;
 int 
-----
(0 rows)

-- DISTINCT and ORDER BY patterns
-- Try some query permutations which once produced identical query IDs
SELECT DISTINCT 1 AS "int";
 int 
-----
   1
(1 row)

SELECT DISTINCT 2 AS "int";
 int 
-----
   2
(1 row)

SELECT 1 AS "int" ORDER BY 1;
 int 
-----
   1
(1 row)

SELECT 2 AS "int" ORDER BY 1;
 int 
-----
   2
(1 row)

/* this comment should not appear in the output */
SELECT 'hello'
  -- but this one will appear
  AS "text";
 text  
-------
 hello
(1 row)

SELECT 'world' AS "text";
 text  
-------
 world
(1 row)

-- transaction
BEGIN;
SELECT 1 AS "int";
 int 
-----
   1
(1 row)

SELECT 'hello' AS "text";
 text  
-------
 hello
(1 row)

COMMIT;
-- compound transaction
BEGIN \;
SELECT 2.0 AS "float" \;
SELECT 'world' AS "text" \;
COMMIT;
 float 
-------
   2.0
(1 row)

 text  
-------
 world
(1 row)

-- compound with empty statements and spurious leading spacing
\;\;   SELECT 3 + 3 \;\;\;   SELECT ' ' || ' !' \;\;   SELECT 1 + 4 \;;
 ?column? 
----------
        6
(1 row)

 ?column? 
----------
   !
(1 row)

 ?column? 
----------
        5
(1 row)

-- non ;-terminated statements
SELECT 1 + 1 + 1 AS "add" \gset
SELECT :add + 1 + 1 AS "add" \;
SELECT :add + 1 + 1 AS "add" \gset
 add 
-----
   5
(1 row)

-- set operator
SELECT 1 AS i UNION SELECT 2 ORDER BY i;
 i 
---
 1
 2
(2 rows)

-- ? operator
select '{"a":1, "b":2}'::jsonb ? 'b';
 ?column? 
----------
 t
(1 row)

-- cte
WITH t(f) AS (
  VALUES (1.0), (2.0)
)
  SELECT f FROM t ORDER BY f;
  f  
-----
 1.0
 2.0
(2 rows)

-- prepared statement with parameter
PREPARE pgss_test (int) AS SELECT $1, 'test' LIMIT 1;
EXECUTE pgss_test(1);
 ?column? | ?column? 
----------+----------
        1 | test
(1 row)

DEALLOCATE pgss_test;
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls | rows |                                    query                                     
-------+------+------------------------------------------------------------------------------
     1 |    1 | PREPARE pgss_test (int) AS SELECT $1, $2 LIMIT $3
     4 |    4 | SELECT $1                                                                   +
       |      |   -- but this one will appear                                               +
       |      |   AS "text"
     2 |    2 | SELECT $1 + $2
     3 |    3 | SELECT $1 + $2 + $3 AS "add"
     1 |    1 | SELECT $1 AS "float"
     2 |    2 | SELECT $1 AS "int"
     2 |    2 | SELECT $1 AS "int" LIMIT $2
     2 |    0 | SELECT $1 AS "int" OFFSET $2
     6 |    0 | SELECT $1 AS "int" OFFSET $2 LIMIT $3
     2 |    2 | SELECT $1 AS "int" ORDER BY 1
     1 |    2 | SELECT $1 AS i UNION SELECT $2 ORDER BY i
     1 |    1 | SELECT $1 || $2
     2 |    2 | SELECT DISTINCT $1 AS "int"
     0 |    0 | SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C"
     1 |    1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
     1 |    2 | WITH t(f) AS (                                                              +
       |      |   VALUES ($1), ($2)                                                         +
       |      | )                                                                           +
       |      |   SELECT f FROM t ORDER BY f
     1 |    1 | select $1::jsonb ? $2
(17 rows)

SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

-- normalization of constants and parameters, with constant locations
-- recorded one or more times.
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

SELECT WHERE '1' IN ('1'::int, '3'::int::text);
--
(1 row)

SELECT WHERE (1, 2) IN ((1, 2), (2, 3));
--
(1 row)

SELECT WHERE (3, 4) IN ((5, 6), (8, 7));
--
(0 rows)

SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C";
                                 query                                  | calls 
------------------------------------------------------------------------+-------
 SELECT WHERE $1 IN ($2::int, $3::int::text)                            |     1
 SELECT WHERE ($1, $2) IN (($3, $4), ($5, $6))                          |     2
 SELECT pg_stat_statements_reset() IS NOT NULL AS t                     |     1
 SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C" |     0
(4 rows)

-- with the last element being an explicit function call with an argument, ensure
-- the normalization of the squashing interval is correct.
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

SELECT WHERE 1 IN (1, int4(1), int4(2));
--
(1 row)

SELECT WHERE 1 = ANY (ARRAY[1, int4(1), int4(2)]);
--
(1 row)

SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C";
                                 query                                  | calls 
------------------------------------------------------------------------+-------
 SELECT WHERE $1 IN ($2 /*, ... */)                                     |     2
 SELECT pg_stat_statements_reset() IS NOT NULL AS t                     |     1
 SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C" |     0
(3 rows)

--
-- queries with locking clauses
--
CREATE TABLE pgss_a (id integer PRIMARY KEY);
CREATE TABLE pgss_b (id integer PRIMARY KEY, a_id integer REFERENCES pgss_a);
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

-- control query
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id;
 id | id | a_id 
----+----+------
(0 rows)

-- test range tables
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a, pgss_b; -- matches plain "FOR UPDATE"
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b, pgss_a;
 id | id | a_id 
----+----+------
(0 rows)

-- test strengths
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR NO KEY UPDATE;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR SHARE;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR KEY SHARE;
 id | id | a_id 
----+----+------
(0 rows)

-- test wait policies
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE NOWAIT;
 id | id | a_id 
----+----+------
(0 rows)

SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE SKIP LOCKED;
 id | id | a_id 
----+----+------
(0 rows)

SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls |                                          query                                           
-------+------------------------------------------------------------------------------------------
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR KEY SHARE
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR NO KEY UPDATE
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR SHARE
     2 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE NOWAIT
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b, pgss_a
     1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE SKIP LOCKED
     0 | SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C"
     1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
(12 rows)

DROP TABLE pgss_a, pgss_b CASCADE;
--
-- access to pg_stat_statements_info view
--
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

SELECT dealloc FROM pg_stat_statements_info;
 dealloc 
---------
       0
(1 row)

-- FROM [ONLY]
CREATE TABLE tbl_inh(id integer);
CREATE TABLE tbl_inh_1() INHERITS (tbl_inh);
INSERT INTO tbl_inh_1 SELECT 1;
SELECT * FROM tbl_inh;
 id 
----
  1
(1 row)

SELECT * FROM ONLY tbl_inh;
 id 
----
(0 rows)

SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FROM%tbl_inh%';
 count 
-------
     2
(1 row)

-- WITH TIES
CREATE TABLE limitoption AS SELECT 0 AS val FROM generate_series(1, 10);
SELECT *
FROM limitoption
WHERE val < 2
ORDER BY val
FETCH FIRST 2 ROWS WITH TIES;
 val 
-----
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
(10 rows)

SELECT *
FROM limitoption
WHERE val < 2
ORDER BY val
FETCH FIRST 2 ROW ONLY;
 val 
-----
   0
   0
(2 rows)

SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FETCH FIRST%';
 count 
-------
     2
(1 row)

-- GROUP BY, HAVING, GROUPING
SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a;
 count 
-------
     1
(1 row)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY b;
 count 
-------
     1
(1 row)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a, b;
 count 
-------
     1
(1 row)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY b, a;
 count 
-------
     1
(1 row)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY GROUPING SETS(a, ());
 count 
-------
     1
     1
(2 rows)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY GROUPING SETS(b, ());
 count 
-------
     1
     1
(2 rows)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a HAVING a = 1;
 count 
-------
     1
(1 row)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a HAVING a = 2;
 count 
-------
(0 rows)

SELECT COUNT(*) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY b HAVING b = 1;
 count 
-------
(0 rows)

SELECT GROUPING(a) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a;
 grouping 
----------
        0
(1 row)

SELECT GROUPING(b) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY b;
 grouping 
----------
        0
(1 row)

SELECT GROUPING(b) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY a, b;
 grouping 
----------
        0
(1 row)

SELECT GROUPING(b) FROM (VALUES (1::INT, 2::INT)) AS t(a, b) GROUP BY b, a;
 grouping 
----------
        0
(1 row)

SELECT calls, query FROM pg_stat_statements WHERE query LIKE '%GROUP BY%' ORDER BY query COLLATE "C";
 calls |                                           query                                           
-------+-------------------------------------------------------------------------------------------
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY GROUPING SETS(a, ())
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY GROUPING SETS(b, ())
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY a
     2 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY a HAVING a = $3
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY a, b
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY b
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY b HAVING b = $3
     1 | SELECT COUNT(*) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY b, a
     1 | SELECT GROUPING(a) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY a
     1 | SELECT GROUPING(b) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY a, b
     1 | SELECT GROUPING(b) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY b
     1 | SELECT GROUPING(b) FROM (VALUES ($1::INT, $2::INT)) AS t(a, b) GROUP BY b, a
(12 rows)

-- GROUP BY [DISTINCT]
SELECT a, b, c
FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
GROUP BY ROLLUP(a, b), rollup(a, c)
ORDER BY a, b, c;
 a | b | c 
---+---+---
 1 | 2 | 3
 1 | 2 |  
 1 | 2 |  
 1 |   | 3
 1 |   | 3
 1 |   |  
 1 |   |  
 1 |   |  
 4 |   | 6
 4 |   | 6
 4 |   | 6
 4 |   |  
 4 |   |  
 4 |   |  
 4 |   |  
 4 |   |  
 7 | 8 | 9
 7 | 8 |  
 7 | 8 |  
 7 |   | 9
 7 |   | 9
 7 |   |  
 7 |   |  
 7 |   |  
   |   |  
(25 rows)

SELECT a, b, c
FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
GROUP BY DISTINCT ROLLUP(a, b), rollup(a, c)
ORDER BY a, b, c;
 a | b | c 
---+---+---
 1 | 2 | 3
 1 | 2 |  
 1 |   | 3
 1 |   |  
 4 |   | 6
 4 |   | 6
 4 |   |  
 4 |   |  
 7 | 8 | 9
 7 | 8 |  
 7 |   | 9
 7 |   |  
   |   |  
(13 rows)

SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%GROUP BY%ROLLUP%';
 count 
-------
     2
(1 row)

-- GROUPING SET agglevelsup
SELECT (
  SELECT (
    SELECT GROUPING(a,b) FROM (VALUES (1)) v2(c)
  ) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
 grouping 
----------
        0
        0
        0
(3 rows)

SELECT (
  SELECT (
    SELECT GROUPING(e,f) FROM (VALUES (1)) v2(c)
  ) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
 grouping 
----------
        3
        0
        1
(3 rows)

SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%SELECT GROUPING%';
 count 
-------
     6
(1 row)

SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

-- Temporary table with same name, re-created.
BEGIN;
  CREATE TEMP TABLE temp_t (id int) ON COMMIT DROP;
  SELECT * FROM temp_t;
 id 
----
(0 rows)

COMMIT;
BEGIN;
  CREATE TEMP TABLE temp_t (id int) ON COMMIT DROP;
  SELECT * FROM temp_t;
 id 
----
(0 rows)

COMMIT;
SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls |                                 query                                  
-------+------------------------------------------------------------------------
     2 | SELECT * FROM temp_t
     0 | SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C"
     1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
(3 rows)

SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

-- search_path with various schemas and temporary tables
CREATE SCHEMA pgss_schema_1;
CREATE SCHEMA pgss_schema_2;
-- Same attributes.
CREATE TABLE pgss_schema_1.tab_search_same (a int, b int);
CREATE TABLE pgss_schema_2.tab_search_same (a int, b int);
CREATE TEMP TABLE tab_search_same (a int, b int);
-- Different number of attributes, mapping types
CREATE TABLE pgss_schema_1.tab_search_diff_1 (a int);
CREATE TABLE pgss_schema_2.tab_search_diff_1 (a int, b int);
CREATE TEMP TABLE tab_search_diff_1 (a int, b int, c int);
-- Same number of attributes, different types
CREATE TABLE pgss_schema_1.tab_search_diff_2 (a int);
CREATE TABLE pgss_schema_2.tab_search_diff_2 (a text);
CREATE TEMP TABLE tab_search_diff_2 (a bigint);
-- First permanent schema
SET search_path = 'pgss_schema_1';
SELECT count(*) FROM tab_search_same;
 count 
-------
     0
(1 row)

SELECT a, b FROM tab_search_same;
 a | b 
---+---
(0 rows)

SELECT count(*) FROM tab_search_diff_1;
 count 
-------
     0
(1 row)

SELECT count(*) FROM tab_search_diff_2;
 count 
-------
     0
(1 row)

SELECT a FROM tab_search_diff_2 AS t1;
 a 
---
(0 rows)

SELECT a FROM tab_search_diff_2;
 a 
---
(0 rows)

SELECT a AS a1 FROM tab_search_diff_2;
 a1 
----
(0 rows)

-- Second permanent schema
SET search_path = 'pgss_schema_2';
SELECT count(*) FROM tab_search_same;
 count 
-------
     0
(1 row)

SELECT a, b FROM tab_search_same;
 a | b 
---+---
(0 rows)

SELECT count(*) FROM tab_search_diff_1;
 count 
-------
     0
(1 row)

SELECT count(*) FROM tab_search_diff_2;
 count 
-------
     0
(1 row)

SELECT a FROM tab_search_diff_2 AS t1;
 a 
---
(0 rows)

SELECT a FROM tab_search_diff_2;
 a 
---
(0 rows)

SELECT a AS a1 FROM tab_search_diff_2;
 a1 
----
(0 rows)

-- Temporary schema
SET search_path = 'pg_temp';
SELECT count(*) FROM tab_search_same;
 count 
-------
     0
(1 row)

SELECT a, b FROM tab_search_same;
 a | b 
---+---
(0 rows)

SELECT count(*) FROM tab_search_diff_1;
 count 
-------
     0
(1 row)

SELECT count(*) FROM tab_search_diff_2;
 count 
-------
     0
(1 row)

SELECT a FROM tab_search_diff_2 AS t1;
 a 
---
(0 rows)

SELECT a FROM tab_search_diff_2;
 a 
---
(0 rows)

SELECT a AS a1 FROM tab_search_diff_2;
 a1 
----
(0 rows)

RESET search_path;
-- Schema qualifications
SELECT count(*) FROM pgss_schema_1.tab_search_same;
 count 
-------
     0
(1 row)

SELECT a, b FROM pgss_schema_1.tab_search_same;
 a | b 
---+---
(0 rows)

SELECT count(*) FROM pgss_schema_2.tab_search_diff_1;
 count 
-------
     0
(1 row)

SELECT count(*) FROM pg_temp.tab_search_diff_2;
 count 
-------
     0
(1 row)

SELECT a FROM pgss_schema_2.tab_search_diff_2 AS t1;
 a 
---
(0 rows)

SELECT a FROM pgss_schema_2.tab_search_diff_2;
 a 
---
(0 rows)

SELECT a AS a1 FROM pgss_schema_2.tab_search_diff_2;
 a1 
----
(0 rows)

SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls |                                 query                                  
-------+------------------------------------------------------------------------
     8 | SELECT a FROM tab_search_diff_2
     4 | SELECT a FROM tab_search_diff_2 AS t1
     4 | SELECT a, b FROM tab_search_same
     0 | SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C"
     4 | SELECT count(*) FROM tab_search_diff_1
     4 | SELECT count(*) FROM tab_search_diff_2
     4 | SELECT count(*) FROM tab_search_same
     1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
(8 rows)

DROP SCHEMA pgss_schema_1 CASCADE;
NOTICE:  drop cascades to 3 other objects
DETAIL:  drop cascades to table pgss_schema_1.tab_search_same
drop cascades to table pgss_schema_1.tab_search_diff_1
drop cascades to table pgss_schema_1.tab_search_diff_2
DROP SCHEMA pgss_schema_2 CASCADE;
NOTICE:  drop cascades to 3 other objects
DETAIL:  drop cascades to table pgss_schema_2.tab_search_same
drop cascades to table pgss_schema_2.tab_search_diff_1
drop cascades to table pgss_schema_2.tab_search_diff_2
DROP TABLE tab_search_same, tab_search_diff_1, tab_search_diff_2;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)