Support DECLARE CURSOR syntax and added regression for table hinting.

[pghintplan/pg_hint_plan.git] / sql / ut-W.sql

diff --git a/sql/ut-W.sql b/sql/ut-W.sql
index 23e2f63..199b607 100644 (file)
--- a/sql/ut-W.sql
+++ b/sql/ut-W.sql
@@ -8,122 +8,154 @@ SET client_min_messages TO LOG;
 CREATE TABLE s1.tl (a int);
 INSERT INTO s1.tl (SELECT a FROM generate_series(0, 100000) a);
 
--- Queries on ordinary tables
+-- Queries on ordinary tables with default setting
 EXPLAIN (COSTS false) SELECT * FROM s1.t1;
 
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
-/*+Parallel(t1 10)*/
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
+SET max_parallel_workers_per_gather to DEFAULT;
+
+/*+Parallel(t1 8)*/
 EXPLAIN (COSTS false) SELECT * FROM s1.t1;
 
-/*+Parallel(t1 10 soft)*/
+/*+Parallel(t1 8 soft)*/
 EXPLAIN (COSTS false) SELECT * FROM s1.t1;
-SET parallel_setup_cost to DEFAULT;
-SET parallel_tuple_cost to DEFAULT;
-SET min_parallel_relation_size to DEFAULT;
 
-/*+Parallel(t1 10 hard)*/
+/*+Parallel(t1 8 hard)*/
 EXPLAIN (COSTS false) SELECT * FROM s1.t1;
 
 -- Queries on inheritance tables
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
-/*+Parallel(p1 10)*/
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
+/*+Parallel(p1 8)*/
 EXPLAIN (COSTS false) SELECT * FROM p1;
 SET parallel_setup_cost to DEFAULT;
 SET parallel_tuple_cost to DEFAULT;
-SET min_parallel_relation_size to DEFAULT;
+SET min_parallel_table_scan_size to DEFAULT;
+SET min_parallel_index_scan_size to DEFAULT;
 
-/*+Parallel(p1 10 hard)*/
+/*+Parallel(p1 8 hard)*/
 EXPLAIN (COSTS false) SELECT * FROM p1;
 
--- hinting on children don't work but enables parallel
-/*+Parallel(p1_c1 10 hard)*/
+-- hinting on children makes the whole inheritance parallel
+/*+Parallel(p1_c1 8 hard)*/
 EXPLAIN (COSTS false) SELECT * FROM p1;
 
 
 -- Joins
-EXPLAIN (COSTS false) SELECT * FROM p1_c1 join p2_c1 on p1_c1.id = p2_c1.id;
+EXPLAIN (COSTS false) SELECT * FROM p1_c1_c1 join p2_c1_c1 on p1_c1_c1.id = p2_c1_c1.id;
 
-/*+Parallel(p1_c1 10 hard)*/
-EXPLAIN (COSTS false) SELECT * FROM p1_c1 join p2_c1 on p1_c1.id = p2_c1.id;
+/*+Parallel(p1_c1_c1 8 hard)*/
+EXPLAIN (COSTS false) SELECT * FROM p1_c1_c1 join p2_c1_c1 on p1_c1_c1.id = p2_c1_c1.id;
 
-/*+Parallel(p2_c1 10 hard)*/
-EXPLAIN (COSTS false) SELECT * FROM p1_c1 join p2_c1 on p1_c1.id = p2_c1.id;
+SET parallel_setup_cost to 0;
+SET parallel_tuple_cost to 0;
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
 
-/*+Parallel(p1_c1 10 hard) Parallel(p2_c1 10 hard)*/
-EXPLAIN (COSTS false) SELECT * FROM p1_c1 join p2_c1 on p1_c1.id = p2_c1.id;
+/*+Parallel(p1_c1_c1 8 soft) Parallel(p2_c1_c1 0)*/
+EXPLAIN (COSTS false) SELECT * FROM p1_c1_c1 join p2_c1_c1 on p1_c1_c1.id = p2_c1_c1.id;
+
+/*+Parallel(p1_c1_c1 8 hard) Parallel(p2_c1_c1 0)*/
+EXPLAIN (COSTS false) SELECT * FROM p1_c1_c1 join p2_c1_c1 on p1_c1_c1.id = p2_c1_c1.id;
+
+/*+Parallel(p1_c1_c1 8 hard) Parallel(p2_c1_c1 8 hard)*/
+EXPLAIN (COSTS false) SELECT * FROM p1_c1_c1 join p2_c1_c1 on p1_c1_c1.id = p2_c1_c1.id;
 
 
 -- Joins on inheritance tables
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
-/*+Parallel(p1 10)*/
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
+/*+Parallel(p1 8)*/
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
+
+/*+Parallel(p1 8)Parallel(p2 0)*/
+EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
+
 SET parallel_setup_cost to DEFAULT;
 SET parallel_tuple_cost to DEFAULT;
-SET min_parallel_relation_size to DEFAULT;
+SET min_parallel_table_scan_size to DEFAULT;
+SET min_parallel_index_scan_size to DEFAULT;
 
-/*+Parallel(p2 10 hard)*/
+/*+Parallel(p2 8 soft)*/
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
 
-/*+Parallel(p2 10 hard) Parallel(p1 5 hard) */
+/*+Parallel(p2 8 hard)*/
+EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
+
+/*+Parallel(p2 8 hard) Parallel(p1 5 hard) */
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
 
 
 -- Mixture with a scan hint
 -- p1 can be parallel
-/*+Parallel(p1 10 hard) IndexScan(p2) */
+/*+Parallel(p1 8 hard) IndexScan(p2) */
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
 
--- seqscan doesn't harm parallelism
-/*+Parallel(p1 10 hard) SeqScan(p1) */
+-- Parallel sequential scan
+/*+Parallel(p1 8 hard) SeqScan(p1) */
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
 
--- parallelism is not available for the case
-/*+Parallel(p1 10 hard) IndexScan(p1) */
+-- Parallel index scan
+/*+Parallel(p1 8 hard) IndexScan(p1) */
+EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
+
+-- This hint doesn't turn on parallel, so the Parallel hint is ignored
+set max_parallel_workers_per_gather TO 0;
+/*+Parallel(p1 0 hard) IndexScan(p1) */
 EXPLAIN (COSTS false) SELECT * FROM p1 join p2 on p1.id = p2.id;
 
 
 -- Parallel on UNION
 EXPLAIN (COSTS false) SELECT id FROM p1 UNION ALL SELECT id FROM p2;
 
--- some of the scans are not parallel, so this cannot be parallel
+-- parallel hinting on any relation enables parallel
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
 SET max_parallel_workers_per_gather to 0;
-/*+Parallel(p1 10) */
+
+/*+Parallel(p1 8) */
 EXPLAIN (COSTS false) SELECT id FROM p1 UNION ALL SELECT id FROM p2;
 
--- all children are parallel, so this can be parallel
-/*+Parallel(p1 10) Parallel(p2 10) */
+-- set hint does the same thing
+/*+Set(max_parallel_workers_per_gather 1)*/
 EXPLAIN (COSTS false) SELECT id FROM p1 UNION ALL SELECT id FROM p2;
+
+-- applies largest number of workers on merged parallel paths
 SET parallel_setup_cost to DEFAULT;
 SET parallel_tuple_cost to DEFAULT;
-SET min_parallel_relation_size to DEFAULT;
-SET max_parallel_workers_per_gather to DEFAULT;
-
-/*+Parallel(p1 10 hard)Parallel(p2 10 hard) */
+SET min_parallel_table_scan_size to DEFAULT;
+SET min_parallel_index_scan_size to DEFAULT;
+SET max_parallel_workers_per_gather to 8;
+/*+Parallel(p1 5 hard)Parallel(p2 6 hard) */
 EXPLAIN (COSTS false) SELECT id FROM p1 UNION ALL SELECT id FROM p2;
 
 
 -- num of workers of non-hinted relations should be default value
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
 SET max_parallel_workers_per_gather to 3;
+SET enable_indexscan to false;
 
-/*+Parallel(p1 10 hard) */
+/*+Parallel(p1 8 hard) */
 EXPLAIN (COSTS false) SELECT * FROM p1 join t1 on p1.id = t1.id;
 
 -- Negative hint
+SET enable_indexscan to DEFAULT;
 SET parallel_setup_cost to 0;
 SET parallel_tuple_cost to 0;
-SET min_parallel_relation_size to 0;
+SET min_parallel_table_scan_size to 0;
+SET min_parallel_index_scan_size to 0;
 SET max_parallel_workers_per_gather to 5;
 EXPLAIN (COSTS false) SELECT * FROM p1;
 
@@ -132,8 +164,22 @@ EXPLAIN (COSTS false) SELECT * FROM p1;
 
 -- Errors
 /*+Parallel(p1 100x hard)Parallel(p1 -1000 hard)Parallel(p1 1000000 hard)
-   Parallel(p1 10 hoge)Parallel(p1)Parallel(p1 100 soft x)*/
+   Parallel(p1 8 hoge)Parallel(p1)Parallel(p1 100 soft x)*/
 EXPLAIN (COSTS false) SELECT id FROM p1 UNION ALL SELECT id FROM p2;
 
+-- Hints on unhintable relations are just ignored
+/*+Parallel(p1 5 hard) Parallel(s1 3 hard) IndexScan(ft1) SeqScan(cte1)
+  TidScan(fs1) IndexScan(t) IndexScan(*VALUES*) */
+EXPLAIN (COSTS false) SELECT id FROM p1_c1_c1 as s1 TABLESAMPLE SYSTEM(10)
+ UNION ALL
+SELECT id FROM ft1
+ UNION ALL
+(WITH cte1 AS (SELECT id FROM p1 WHERE id % 2 = 0) SELECT id FROM cte1)
+ UNION ALL
+SELECT userid FROM pg_stat_statements fs1
+ UNION ALL
+SELECT x FROM (VALUES (1), (2), (3)) t(x);
+
+
 ALTER SYSTEM SET session_preload_libraries TO DEFAULT;
 SELECT pg_reload_conf();