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Stable13 #29

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Merged
danolivo merged 20 commits into postgrespro:stable13 from Alena0704:stable13
Jun 13, 2021
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197145a
Prevent distributed deadlocks. Disable AQO for FDW queries.
danolivo Dec 3, 2020
626d5ee
Allow learning (and predicting for) on a ForeignScan, an Append, a Me...
danolivo Dec 4, 2020
386cd6d
Add support of postgres_fdw push-down.
danolivo Dec 4, 2020
0cd3ce3
Process GatherMergePath in get_path_clauses routine.
danolivo Dec 15, 2020
e8dcb5b
Add a foreign relation estimation hook into the core patch and AQO.
danolivo Jan 15, 2021
38d4f77
Add basic regression test on FDW support.
danolivo Jan 15, 2021
8291220
Add missed aqo_fdw.sql
danolivo Jan 19, 2021
9aff621
Prepare the insert_index routine for PGv14 signature
danolivo Jan 18, 2021
36c97ac
Change the license sentence in accordance with 2021.
danolivo Jan 19, 2021
34c640d
Fix the state:
danolivo Jan 19, 2021
fbf27d6
Rename aqo.details to aqo.show_details.
danolivo Jan 20, 2021
d8e18ce
Update the readme file in accordance with the new AQO version.
danolivo Jan 20, 2021
418c7d4
Bugfix of the aqo_fdw regress test
danolivo Jan 20, 2021
505c064
Update README.md
danolivo Feb 6, 2021
453bef5
Rename the aqo_details to aqo_show_details
danolivo Feb 18, 2021
d705b5d
Store selectivity cache data in the cache memory context instead of
danolivo Feb 18, 2021
2b20ff0
Change insert/update scheme for the ML-knowledge base.
danolivo Feb 18, 2021
436b3e6
Improve AQO makefile
danolivo Feb 18, 2021
8ec6572
Bugfix: don't create ignorance table in parallel worker.
danolivo Feb 18, 2021
d339ad0
Make the explain of AQO more readable.
danolivo Mar 1, 2021
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Fix the state: 
AQO supports push-down of trivial JOIN and JOIN with mergejoinable clauses.
  • Loading branch information
danolivo authored and Alena0704 committed Jun 12, 2021
commit 34c640d40f511f236f2186a57e1ff8de1f85f360
54 changes: 48 additions & 6 deletions expected/aqo_fdw.out
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,9 @@ CREATE TABLE local (x int);
CREATE FOREIGN TABLE frgn(x int) SERVER loopback OPTIONS (table_name 'local');
INSERT INTO frgn (x) VALUES (1);
ANALYZE local;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;
-- Trivial foreign scan.s
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn;
QUERY PLAN
-------------------------------------------------------------
Foreign Scan on frgn (actual rows=1 loops=1) (AQO not used)
Expand All @@ -30,7 +32,8 @@ EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;
JOINS: 0
(4 rows)

EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn;
QUERY PLAN
-----------------------------------------------------------------------------
Foreign Scan on frgn (actual rows=1 loops=1) (AQO: cardinality=1, error=0%)
Expand All @@ -39,8 +42,9 @@ EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;
JOINS: 0
(4 rows)

-- Push down base filters.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frgn WHERE x < 10;
-- Push down base filters. Use verbose mode to see filters.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT x FROM frgn WHERE x < 10;
QUERY PLAN
--------------------------------------------------------------------
Foreign Scan on public.frgn (actual rows=1 loops=1) (AQO not used)
Expand All @@ -51,7 +55,8 @@ EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frg
JOINS: 0
(6 rows)

EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frgn WHERE x < 10;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT x FROM frgn WHERE x < 10;
QUERY PLAN
------------------------------------------------------------------------------------
Foreign Scan on public.frgn (actual rows=1 loops=1) (AQO: cardinality=1, error=0%)
Expand All @@ -62,7 +67,8 @@ EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frg
JOINS: 0
(6 rows)

EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn WHERE x < -10; -- AQO ignores constants
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn WHERE x < -10; -- AQO ignores constants
QUERY PLAN
-------------------------------------------------------------------------------
Foreign Scan on frgn (actual rows=0 loops=1) (AQO: cardinality=1, error=100%)
Expand All @@ -71,4 +77,40 @@ EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn WHERE x
JOINS: 0
(4 rows)

-- Trivial JOIN push-down.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x=b.x;
QUERY PLAN
---------------------------------------------------------------------------
Merge Join (actual rows=1 loops=1) (AQO not used)
Merge Cond: (a.x = b.x)
-> Sort (actual rows=1 loops=1) (AQO not used)
Sort Key: a.x
Sort Method: quicksort Memory: 25kB
-> Foreign Scan on frgn a (actual rows=1 loops=1) (AQO not used)
-> Sort (actual rows=1 loops=1) (AQO not used)
Sort Key: b.x
Sort Method: quicksort Memory: 25kB
-> Foreign Scan on frgn b (actual rows=1 loops=1) (AQO not used)
Using aqo: true
AQO mode: LEARN
JOINS: 0
(13 rows)

EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x=b.x;
QUERY PLAN
---------------------------------------------------------------------
Foreign Scan (actual rows=1 loops=1) (AQO: cardinality=1, error=0%)
Relations: (frgn a) INNER JOIN (frgn b)
Using aqo: true
AQO mode: LEARN
JOINS: 0
(5 rows)

-- Non-mergejoinable join condition
--EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
--SELECT * FROM frgn AS a, frgn AS b WHERE a.x<b.x;
--EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
--SELECT * FROM frgn AS a, frgn AS b WHERE a.x<b.x;
DROP EXTENSION aqo;
32 changes: 25 additions & 7 deletions sql/aqo_fdw.sql
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -26,13 +26,31 @@ CREATE FOREIGN TABLE frgn(x int) SERVER loopback OPTIONS (table_name 'local');
INSERT INTO frgn (x) VALUES (1);
ANALYZE local;

EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn;

-- Push down base filters.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frgn WHERE x < 10;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE) SELECT x FROM frgn WHERE x < 10;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF) SELECT x FROM frgn WHERE x < -10; -- AQO ignores constants
-- Trivial foreign scan.s
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn;

-- Push down base filters. Use verbose mode to see filters.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT x FROM frgn WHERE x < 10;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT x FROM frgn WHERE x < 10;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT x FROM frgn WHERE x < -10; -- AQO ignores constants

-- Trivial JOIN push-down.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x=b.x;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x=b.x;

-- TODO: Non-mergejoinable join condition.
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x<b.x;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF, VERBOSE)
SELECT * FROM frgn AS a, frgn AS b WHERE a.x<b.x;

DROP EXTENSION aqo;

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