--
-- Cursors
--
-- These tests require track_utility to be enabled.
SET pg_stat_statements.track_utility = TRUE;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 t 
---
 t
(1 row)

-- DECLARE
-- SELECT is normalized.
DECLARE cursor_stats_1 CURSOR WITH HOLD FOR SELECT 1;
CLOSE cursor_stats_1;
DECLARE cursor_stats_1 CURSOR WITH HOLD FOR SELECT 2;
CLOSE cursor_stats_1;
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls | rows |                         query                         
-------+------+-------------------------------------------------------
     2 |    0 | CLOSE cursor_stats_1
     2 |    0 | DECLARE cursor_stats_1 CURSOR WITH HOLD FOR SELECT $1
     1 |    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)

-- FETCH
BEGIN;
DECLARE cursor_stats_1 CURSOR WITH HOLD FOR SELECT 2;
DECLARE cursor_stats_2 CURSOR WITH HOLD FOR SELECT 3;
FETCH 1 IN cursor_stats_1;
 ?column? 
----------
        2
(1 row)

FETCH 1 IN cursor_stats_2;
 ?column? 
----------
        3
(1 row)

CLOSE cursor_stats_1;
CLOSE cursor_stats_2;
COMMIT;
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls | rows |                         query                         
-------+------+-------------------------------------------------------
     1 |    0 | BEGIN
     1 |    0 | CLOSE cursor_stats_1
     1 |    0 | CLOSE cursor_stats_2
     1 |    0 | COMMIT
     1 |    0 | DECLARE cursor_stats_1 CURSOR WITH HOLD FOR SELECT $1
     1 |    0 | DECLARE cursor_stats_2 CURSOR WITH HOLD FOR SELECT $1
     1 |    1 | FETCH $1 IN cursor_stats_1
     1 |    1 | FETCH $1 IN cursor_stats_2
     1 |    1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
(9 rows)

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

-- Normalization of FETCH statements
BEGIN;
DECLARE pgss_cursor CURSOR FOR SELECT FROM generate_series(1, 10);
-- implicit directions
FETCH pgss_cursor;
--
(1 row)

FETCH 1 pgss_cursor;
--
(1 row)

FETCH 2 pgss_cursor;
--
(2 rows)

FETCH -1 pgss_cursor;
--
(1 row)

-- explicit NEXT
FETCH NEXT pgss_cursor;
--
(1 row)

-- explicit PRIOR
FETCH PRIOR pgss_cursor;
--
(1 row)

-- explicit FIRST
FETCH FIRST pgss_cursor;
--
(1 row)

-- explicit LAST
FETCH LAST pgss_cursor;
--
(1 row)

-- explicit ABSOLUTE
FETCH ABSOLUTE 1 pgss_cursor;
--
(1 row)

FETCH ABSOLUTE 2 pgss_cursor;
--
(1 row)

FETCH ABSOLUTE -1 pgss_cursor;
--
(1 row)

-- explicit RELATIVE
FETCH RELATIVE 1 pgss_cursor;
--
(0 rows)

FETCH RELATIVE 2 pgss_cursor;
--
(0 rows)

FETCH RELATIVE -1 pgss_cursor;
--
(1 row)

-- explicit FORWARD
FETCH ALL pgss_cursor;
--
(0 rows)

-- explicit FORWARD ALL
FETCH FORWARD ALL pgss_cursor;
--
(0 rows)

-- explicit FETCH FORWARD
FETCH FORWARD pgss_cursor;
--
(0 rows)

FETCH FORWARD 1 pgss_cursor;
--
(0 rows)

FETCH FORWARD 2 pgss_cursor;
--
(0 rows)

FETCH FORWARD -1 pgss_cursor;
--
(1 row)

-- explicit FETCH BACKWARD
FETCH BACKWARD pgss_cursor;
--
(1 row)

FETCH BACKWARD 1 pgss_cursor;
--
(1 row)

FETCH BACKWARD 2 pgss_cursor;
--
(2 rows)

FETCH BACKWARD -1 pgss_cursor;
--
(1 row)

-- explicit BACKWARD ALL
FETCH BACKWARD ALL pgss_cursor;
--
(6 rows)

COMMIT;
SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
 calls |                               query                                
-------+--------------------------------------------------------------------
     1 | BEGIN
     1 | COMMIT
     1 | DECLARE pgss_cursor CURSOR FOR SELECT FROM generate_series($1, $2)
     3 | FETCH ABSOLUTE $1 pgss_cursor
     1 | FETCH ALL pgss_cursor
     1 | FETCH BACKWARD ALL pgss_cursor
     4 | FETCH BACKWARD pgss_cursor
     1 | FETCH FIRST pgss_cursor
     1 | FETCH FORWARD ALL pgss_cursor
     4 | FETCH FORWARD pgss_cursor
     1 | FETCH LAST pgss_cursor
     1 | FETCH NEXT pgss_cursor
     1 | FETCH PRIOR pgss_cursor
     3 | FETCH RELATIVE $1 pgss_cursor
     4 | FETCH pgss_cursor
     1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
(16 rows)