text: CREATE EXTENSION pg_stat_statements;
  
  --
  -- simple and compound statements
  --
  SET pg_stat_statements.track_utility = FALSE;
  SELECT pg_stat_statements_reset();
  
  SELECT 1 AS "int";
  
  SELECT 'hello'
    -- multiline
    AS "text";
  
  SELECT 'world' AS "text";
  
  -- transaction
  BEGIN;
  SELECT 1 AS "int";
  SELECT 'hello' AS "text";
  COMMIT;
  
  -- compound transaction
  BEGIN \;
  SELECT 2.0 AS "float" \;
  SELECT 'world' AS "text" \;
  COMMIT;
  
  -- compound with empty statements and spurious leading spacing
  \;\;   SELECT 3 + 3 \;\;\;   SELECT ' ' || ' !' \;\;   SELECT 1 + 4 \;;
  
  -- non ;-terminated statements
  SELECT 1 + 1 + 1 AS "add" \gset
  SELECT :add + 1 + 1 AS "add" \;
  SELECT :add + 1 + 1 AS "add" \gset
  
  -- set operator
  SELECT 1 AS i UNION SELECT 2 ORDER BY i;
  
  -- cte
  WITH t(f) AS (
    VALUES (1.0), (2.0)
  )
    SELECT f FROM t ORDER BY f;
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  --
  -- CRUD: INSERT SELECT UPDATE DELETE on test table
  --
  SELECT pg_stat_statements_reset();
  
  -- utility "create table" should not be shown
  CREATE TABLE test (a int, b char(20));
  
  INSERT INTO test VALUES(generate_series(1, 10), 'aaa');
  UPDATE test SET b = 'bbb' WHERE a > 7;
  DELETE FROM test WHERE a > 9;
  
  -- explicit transaction
  BEGIN;
  UPDATE test SET b = '111' WHERE a = 1 ;
  COMMIT;
  
  BEGIN \;
  UPDATE test SET b = '222' WHERE a = 2 \;
  COMMIT ;
  
  UPDATE test SET b = '333' WHERE a = 3 \;
  UPDATE test SET b = '444' WHERE a = 4 ;
  
  BEGIN \;
  UPDATE test SET b = '555' WHERE a = 5 \;
  UPDATE test SET b = '666' WHERE a = 6 \;
  COMMIT ;
  
  -- SELECT with constants
  SELECT * FROM test WHERE a > 5 ORDER BY a ;
  
  SELECT *
    FROM test
    WHERE a > 9
    ORDER BY a ;
  
  -- SELECT without constants
  SELECT * FROM test ORDER BY a;
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  --
  -- pg_stat_statements.track = none
  --
  SET pg_stat_statements.track = 'none';
  SELECT pg_stat_statements_reset();
  
  SELECT 1 AS "one";
  SELECT 1 + 1 AS "two";
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  --
  -- pg_stat_statements.track = top
  --
  SET pg_stat_statements.track = 'top';
  SELECT pg_stat_statements_reset();
  
  DO LANGUAGE plpgsql $$
  BEGIN
    -- this is a SELECT
    PERFORM 'hello world'::TEXT;
  END;
  $$;
  
  -- PL/pgSQL function
  CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
  DECLARE
    r INTEGER;
  BEGIN
    SELECT (i + 1 + 1.0)::INTEGER INTO r;
    RETURN r;
  END; $$ LANGUAGE plpgsql;
  
  SELECT PLUS_TWO(3);
  SELECT PLUS_TWO(7);
  
  -- SQL function --- use LIMIT to keep it from being inlined
  CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
  $$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
  
  SELECT PLUS_ONE(8);
  SELECT PLUS_ONE(10);
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  --
  -- pg_stat_statements.track = all
  --
  SET pg_stat_statements.track = 'all';
  SELECT pg_stat_statements_reset();
  
  -- we drop and recreate the functions to avoid any caching funnies
  DROP FUNCTION PLUS_ONE(INTEGER);
  DROP FUNCTION PLUS_TWO(INTEGER);
  
  -- PL/pgSQL function
  CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
  DECLARE
    r INTEGER;
  BEGIN
    SELECT (i + 1 + 1.0)::INTEGER INTO r;
    RETURN r;
  END; $$ LANGUAGE plpgsql;
  
  SELECT PLUS_TWO(-1);
  SELECT PLUS_TWO(2);
  
  -- SQL function --- use LIMIT to keep it from being inlined
  CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
  $$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
  
  SELECT PLUS_ONE(3);
  SELECT PLUS_ONE(1);
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  --
  -- utility commands
  --
  SET pg_stat_statements.track_utility = TRUE;
  SELECT pg_stat_statements_reset();
  
  SELECT 1;
  CREATE INDEX test_b ON test(b);
  DROP TABLE test \;
  DROP TABLE IF EXISTS test \;
  DROP FUNCTION PLUS_ONE(INTEGER);
  DROP TABLE IF EXISTS test \;
  DROP TABLE IF EXISTS test \;
  DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER);
  DROP FUNCTION PLUS_TWO(INTEGER);
  
  SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
  
  DROP EXTENSION pg_stat_statements;
  