ut-T.out

-- ut-T: tests for table hints
-- This test is focusing on hint retrieval from table
LOAD 'pg_hint_plan';
SET pg_hint_plan.enable_hint TO on;
SET pg_hint_plan.debug_print TO on;
SET client_min_messages TO LOG;
SET search_path TO public;
-- This hint affects queries with an equivalent query ID when executed as
-- a subquery.
SELECT get_query_id('SELECT * FROM t1 WHERE id = 1;') AS query_id \gset
INSERT INTO hint_plan.hints VALUES (DEFAULT, :'query_id', '', 'SeqScan(t1)');
PREPARE p1 AS SELECT * FROM t1 WHERE id = 100;
-- These queries uses IndexScan without hints
SET pg_hint_plan.enable_hint_table to off;
EXPLAIN (COSTS false) SELECT * FROM t1 WHERE id = 100;
           QUERY PLAN           
--------------------------------
 Index Scan using t1_pkey on t1
   Index Cond: (id = 100)
(2 rows)

EXPLAIN (COSTS false) EXECUTE p1;
           QUERY PLAN           
--------------------------------
 Index Scan using t1_pkey on t1
   Index Cond: (id = 100)
(2 rows)

DEALLOCATE p1;
PREPARE p1 AS SELECT * FROM t1 WHERE id = 100;
EXPLAIN (COSTS false) CREATE TABLE ct1 AS EXECUTE p1;
           QUERY PLAN           
--------------------------------
 Index Scan using t1_pkey on t1
   Index Cond: (id = 100)
(2 rows)

DEALLOCATE p1;
PREPARE p1 AS SELECT * FROM t1 WHERE id = 100;
-- Forced to use SeqScan by table hints
SET pg_hint_plan.enable_hint_table to on;
EXPLAIN (COSTS false) SELECT * FROM t1 WHERE id = 100;
LOG:  pg_hint_plan:
used hint:
SeqScan(t1)
not used hint:
duplication hint:
error hint:

      QUERY PLAN      
----------------------
 Seq Scan on t1
   Filter: (id = 100)
(2 rows)

EXPLAIN (COSTS false) EXECUTE p1;
LOG:  pg_hint_plan:
used hint:
SeqScan(t1)
not used hint:
duplication hint:
error hint:

      QUERY PLAN      
----------------------
 Seq Scan on t1
   Filter: (id = 100)
(2 rows)

DEALLOCATE p1;
PREPARE p1 AS SELECT * FROM t1 WHERE id = 100;
EXPLAIN (COSTS false) CREATE TABLE ct1 AS EXECUTE p1;
LOG:  pg_hint_plan:
used hint:
SeqScan(t1)
not used hint:
duplication hint:
error hint:

      QUERY PLAN      
----------------------
 Seq Scan on t1
   Filter: (id = 100)
(2 rows)

DEALLOCATE p1;
SET pg_hint_plan.enable_hint_table to off;
DELETE FROM hint_plan.hints;