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-rw-r--r--src/test/regress/expected/tuplesort.out686
1 files changed, 686 insertions, 0 deletions
diff --git a/src/test/regress/expected/tuplesort.out b/src/test/regress/expected/tuplesort.out
new file mode 100644
index 0000000..418f296
--- /dev/null
+++ b/src/test/regress/expected/tuplesort.out
@@ -0,0 +1,686 @@
+-- only use parallelism when explicitly intending to do so
+SET max_parallel_maintenance_workers = 0;
+SET max_parallel_workers = 0;
+-- A table with contents that, when sorted, triggers abbreviated
+-- key aborts. One easy way to achieve that is to use uuids that all
+-- have the same prefix, as abbreviated keys for uuids just use the
+-- first sizeof(Datum) bytes.
+CREATE TEMP TABLE abbrev_abort_uuids (
+ id serial not null,
+ abort_increasing uuid,
+ abort_decreasing uuid,
+ noabort_increasing uuid,
+ noabort_decreasing uuid);
+INSERT INTO abbrev_abort_uuids (abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing)
+ SELECT
+ ('00000000-0000-0000-0000-'||to_char(g.i, '000000000000FM'))::uuid abort_increasing,
+ ('00000000-0000-0000-0000-'||to_char(20000 - g.i, '000000000000FM'))::uuid abort_decreasing,
+ (to_char(g.i % 10009, '00000000FM')||'-0000-0000-0000-'||to_char(g.i, '000000000000FM'))::uuid noabort_increasing,
+ (to_char(((20000 - g.i) % 10009), '00000000FM')||'-0000-0000-0000-'||to_char(20000 - g.i, '000000000000FM'))::uuid noabort_decreasing
+ FROM generate_series(0, 20000, 1) g(i);
+-- and a few NULLs
+INSERT INTO abbrev_abort_uuids(id) VALUES(0);
+INSERT INTO abbrev_abort_uuids DEFAULT VALUES;
+INSERT INTO abbrev_abort_uuids DEFAULT VALUES;
+-- add just a few duplicates
+INSERT INTO abbrev_abort_uuids (abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing)
+ SELECT abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+ FROM abbrev_abort_uuids
+ WHERE (id < 10 OR id > 19990) AND id % 3 = 0 AND abort_increasing is not null;
+----
+-- Check sort node uses of tuplesort wrt. abbreviated keys
+----
+-- plain sort triggering abbreviated abort
+SELECT abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_increasing OFFSET 20000 - 4;
+ abort_increasing | abort_decreasing
+--------------------------------------+--------------------------------------
+ 00000000-0000-0000-0000-000000019992 | 00000000-0000-0000-0000-000000000008
+ 00000000-0000-0000-0000-000000019993 | 00000000-0000-0000-0000-000000000007
+ 00000000-0000-0000-0000-000000019994 | 00000000-0000-0000-0000-000000000006
+ 00000000-0000-0000-0000-000000019994 | 00000000-0000-0000-0000-000000000006
+ 00000000-0000-0000-0000-000000019995 | 00000000-0000-0000-0000-000000000005
+ 00000000-0000-0000-0000-000000019996 | 00000000-0000-0000-0000-000000000004
+ 00000000-0000-0000-0000-000000019997 | 00000000-0000-0000-0000-000000000003
+ 00000000-0000-0000-0000-000000019997 | 00000000-0000-0000-0000-000000000003
+ 00000000-0000-0000-0000-000000019998 | 00000000-0000-0000-0000-000000000002
+ 00000000-0000-0000-0000-000000019999 | 00000000-0000-0000-0000-000000000001
+ 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ |
+ |
+ |
+(15 rows)
+
+SELECT abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_decreasing NULLS FIRST OFFSET 20000 - 4;
+ abort_increasing | abort_decreasing
+--------------------------------------+--------------------------------------
+ 00000000-0000-0000-0000-000000000011 | 00000000-0000-0000-0000-000000019989
+ 00000000-0000-0000-0000-000000000010 | 00000000-0000-0000-0000-000000019990
+ 00000000-0000-0000-0000-000000000009 | 00000000-0000-0000-0000-000000019991
+ 00000000-0000-0000-0000-000000000008 | 00000000-0000-0000-0000-000000019992
+ 00000000-0000-0000-0000-000000000008 | 00000000-0000-0000-0000-000000019992
+ 00000000-0000-0000-0000-000000000007 | 00000000-0000-0000-0000-000000019993
+ 00000000-0000-0000-0000-000000000006 | 00000000-0000-0000-0000-000000019994
+ 00000000-0000-0000-0000-000000000005 | 00000000-0000-0000-0000-000000019995
+ 00000000-0000-0000-0000-000000000005 | 00000000-0000-0000-0000-000000019995
+ 00000000-0000-0000-0000-000000000004 | 00000000-0000-0000-0000-000000019996
+ 00000000-0000-0000-0000-000000000003 | 00000000-0000-0000-0000-000000019997
+ 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998
+ 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998
+ 00000000-0000-0000-0000-000000000001 | 00000000-0000-0000-0000-000000019999
+ 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000020000
+(15 rows)
+
+-- plain sort not triggering abbreviated abort
+SELECT noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_increasing OFFSET 20000 - 4;
+ noabort_increasing | noabort_decreasing
+--------------------------------------+--------------------------------------
+ 00009997-0000-0000-0000-000000009997 | 00010003-0000-0000-0000-000000010003
+ 00009998-0000-0000-0000-000000009998 | 00010002-0000-0000-0000-000000010002
+ 00009999-0000-0000-0000-000000009999 | 00010001-0000-0000-0000-000000010001
+ 00010000-0000-0000-0000-000000010000 | 00010000-0000-0000-0000-000000010000
+ 00010001-0000-0000-0000-000000010001 | 00009999-0000-0000-0000-000000009999
+ 00010002-0000-0000-0000-000000010002 | 00009998-0000-0000-0000-000000009998
+ 00010003-0000-0000-0000-000000010003 | 00009997-0000-0000-0000-000000009997
+ 00010004-0000-0000-0000-000000010004 | 00009996-0000-0000-0000-000000009996
+ 00010005-0000-0000-0000-000000010005 | 00009995-0000-0000-0000-000000009995
+ 00010006-0000-0000-0000-000000010006 | 00009994-0000-0000-0000-000000009994
+ 00010007-0000-0000-0000-000000010007 | 00009993-0000-0000-0000-000000009993
+ 00010008-0000-0000-0000-000000010008 | 00009992-0000-0000-0000-000000009992
+ |
+ |
+ |
+(15 rows)
+
+SELECT noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing NULLS FIRST OFFSET 20000 - 4;
+ noabort_increasing | noabort_decreasing
+--------------------------------------+--------------------------------------
+ 00010006-0000-0000-0000-000000010006 | 00009994-0000-0000-0000-000000009994
+ 00010005-0000-0000-0000-000000010005 | 00009995-0000-0000-0000-000000009995
+ 00010004-0000-0000-0000-000000010004 | 00009996-0000-0000-0000-000000009996
+ 00010003-0000-0000-0000-000000010003 | 00009997-0000-0000-0000-000000009997
+ 00010002-0000-0000-0000-000000010002 | 00009998-0000-0000-0000-000000009998
+ 00010001-0000-0000-0000-000000010001 | 00009999-0000-0000-0000-000000009999
+ 00010000-0000-0000-0000-000000010000 | 00010000-0000-0000-0000-000000010000
+ 00009999-0000-0000-0000-000000009999 | 00010001-0000-0000-0000-000000010001
+ 00009998-0000-0000-0000-000000009998 | 00010002-0000-0000-0000-000000010002
+ 00009997-0000-0000-0000-000000009997 | 00010003-0000-0000-0000-000000010003
+ 00009996-0000-0000-0000-000000009996 | 00010004-0000-0000-0000-000000010004
+ 00009995-0000-0000-0000-000000009995 | 00010005-0000-0000-0000-000000010005
+ 00009994-0000-0000-0000-000000009994 | 00010006-0000-0000-0000-000000010006
+ 00009993-0000-0000-0000-000000009993 | 00010007-0000-0000-0000-000000010007
+ 00009992-0000-0000-0000-000000009992 | 00010008-0000-0000-0000-000000010008
+(15 rows)
+
+-- bounded sort (disables abbreviated keys)
+SELECT abort_increasing, noabort_increasing FROM abbrev_abort_uuids ORDER BY abort_increasing LIMIT 5;
+ abort_increasing | noabort_increasing
+--------------------------------------+--------------------------------------
+ 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000000000
+ 00000000-0000-0000-0000-000000000001 | 00000001-0000-0000-0000-000000000001
+ 00000000-0000-0000-0000-000000000002 | 00000002-0000-0000-0000-000000000002
+ 00000000-0000-0000-0000-000000000002 | 00000002-0000-0000-0000-000000000002
+ 00000000-0000-0000-0000-000000000003 | 00000003-0000-0000-0000-000000000003
+(5 rows)
+
+SELECT abort_increasing, noabort_increasing FROM abbrev_abort_uuids ORDER BY noabort_increasing NULLS FIRST LIMIT 5;
+ abort_increasing | noabort_increasing
+--------------------------------------+--------------------------------------
+ |
+ |
+ |
+ 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000000000
+ 00000000-0000-0000-0000-000000010009 | 00000000-0000-0000-0000-000000010009
+(5 rows)
+
+----
+-- Check index creation uses of tuplesort wrt. abbreviated keys
+----
+-- index creation using abbreviated keys successfully
+CREATE INDEX abbrev_abort_uuids__noabort_increasing_idx ON abbrev_abort_uuids (noabort_increasing);
+CREATE INDEX abbrev_abort_uuids__noabort_decreasing_idx ON abbrev_abort_uuids (noabort_decreasing);
+-- verify
+EXPLAIN (COSTS OFF)
+SELECT id, noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_increasing LIMIT 5;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------
+ Limit
+ -> Index Scan using abbrev_abort_uuids__noabort_increasing_idx on abbrev_abort_uuids
+(2 rows)
+
+SELECT id, noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_increasing LIMIT 5;
+ id | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------
+ 1 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000
+ 10010 | 00000000-0000-0000-0000-000000010009 | 00009991-0000-0000-0000-000000009991
+ 2 | 00000001-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999
+ 10011 | 00000001-0000-0000-0000-000000010010 | 00009990-0000-0000-0000-000000009990
+ 3 | 00000002-0000-0000-0000-000000000002 | 00009989-0000-0000-0000-000000019998
+(5 rows)
+
+EXPLAIN (COSTS OFF)
+SELECT id, noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing LIMIT 5;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------
+ Limit
+ -> Index Scan using abbrev_abort_uuids__noabort_decreasing_idx on abbrev_abort_uuids
+(2 rows)
+
+SELECT id, noabort_increasing, noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing LIMIT 5;
+ id | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------
+ 20001 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20010 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 9992 | 00009991-0000-0000-0000-000000009991 | 00000000-0000-0000-0000-000000010009
+ 20000 | 00009990-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001
+ 9991 | 00009990-0000-0000-0000-000000009990 | 00000001-0000-0000-0000-000000010010
+(5 rows)
+
+-- index creation using abbreviated keys, hitting abort
+CREATE INDEX abbrev_abort_uuids__abort_increasing_idx ON abbrev_abort_uuids (abort_increasing);
+CREATE INDEX abbrev_abort_uuids__abort_decreasing_idx ON abbrev_abort_uuids (abort_decreasing);
+-- verify
+EXPLAIN (COSTS OFF)
+SELECT id, abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_increasing LIMIT 5;
+ QUERY PLAN
+---------------------------------------------------------------------------------------
+ Limit
+ -> Index Scan using abbrev_abort_uuids__abort_increasing_idx on abbrev_abort_uuids
+(2 rows)
+
+SELECT id, abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_increasing LIMIT 5;
+ id | abort_increasing | abort_decreasing
+-------+--------------------------------------+--------------------------------------
+ 1 | 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000020000
+ 2 | 00000000-0000-0000-0000-000000000001 | 00000000-0000-0000-0000-000000019999
+ 3 | 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998
+ 20004 | 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998
+ 4 | 00000000-0000-0000-0000-000000000003 | 00000000-0000-0000-0000-000000019997
+(5 rows)
+
+EXPLAIN (COSTS OFF)
+SELECT id, abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_decreasing LIMIT 5;
+ QUERY PLAN
+---------------------------------------------------------------------------------------
+ Limit
+ -> Index Scan using abbrev_abort_uuids__abort_decreasing_idx on abbrev_abort_uuids
+(2 rows)
+
+SELECT id, abort_increasing, abort_decreasing FROM abbrev_abort_uuids ORDER BY abort_decreasing LIMIT 5;
+ id | abort_increasing | abort_decreasing
+-------+--------------------------------------+--------------------------------------
+ 20001 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20010 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20000 | 00000000-0000-0000-0000-000000019999 | 00000000-0000-0000-0000-000000000001
+ 19999 | 00000000-0000-0000-0000-000000019998 | 00000000-0000-0000-0000-000000000002
+ 19998 | 00000000-0000-0000-0000-000000019997 | 00000000-0000-0000-0000-000000000003
+(5 rows)
+
+----
+-- Check CLUSTER uses of tuplesort wrt. abbreviated keys
+----
+-- when aborting, increasing order
+BEGIN;
+SET LOCAL enable_indexscan = false;
+CLUSTER abbrev_abort_uuids USING abbrev_abort_uuids__abort_increasing_idx;
+-- head
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 1 | 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000
+ 2 | 00000000-0000-0000-0000-000000000001 | 00000000-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999
+ 3 | 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998 | 00000002-0000-0000-0000-000000000002 | 00009989-0000-0000-0000-000000019998
+ 20004 | 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998 | 00000002-0000-0000-0000-000000000002 | 00009989-0000-0000-0000-000000019998
+ 4 | 00000000-0000-0000-0000-000000000003 | 00000000-0000-0000-0000-000000019997 | 00000003-0000-0000-0000-000000000003 | 00009988-0000-0000-0000-000000019997
+(5 rows)
+
+-- tail
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid DESC LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 0 | | | |
+ 20002 | | | |
+ 20003 | | | |
+ 20001 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20010 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+(5 rows)
+
+ROLLBACK;
+-- when aborting, decreasing order
+BEGIN;
+SET LOCAL enable_indexscan = false;
+CLUSTER abbrev_abort_uuids USING abbrev_abort_uuids__abort_decreasing_idx;
+-- head
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 20010 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20001 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20000 | 00000000-0000-0000-0000-000000019999 | 00000000-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001
+ 19999 | 00000000-0000-0000-0000-000000019998 | 00000000-0000-0000-0000-000000000002 | 00009989-0000-0000-0000-000000019998 | 00000002-0000-0000-0000-000000000002
+ 20009 | 00000000-0000-0000-0000-000000019997 | 00000000-0000-0000-0000-000000000003 | 00009988-0000-0000-0000-000000019997 | 00000003-0000-0000-0000-000000000003
+(5 rows)
+
+-- tail
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid DESC LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 0 | | | |
+ 20002 | | | |
+ 20003 | | | |
+ 1 | 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000
+ 2 | 00000000-0000-0000-0000-000000000001 | 00000000-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999
+(5 rows)
+
+ROLLBACK;
+-- when not aborting, increasing order
+BEGIN;
+SET LOCAL enable_indexscan = false;
+CLUSTER abbrev_abort_uuids USING abbrev_abort_uuids__noabort_increasing_idx;
+-- head
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 1 | 00000000-0000-0000-0000-000000000000 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000
+ 10010 | 00000000-0000-0000-0000-000000010009 | 00000000-0000-0000-0000-000000009991 | 00000000-0000-0000-0000-000000010009 | 00009991-0000-0000-0000-000000009991
+ 2 | 00000000-0000-0000-0000-000000000001 | 00000000-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999
+ 10011 | 00000000-0000-0000-0000-000000010010 | 00000000-0000-0000-0000-000000009990 | 00000001-0000-0000-0000-000000010010 | 00009990-0000-0000-0000-000000009990
+ 20004 | 00000000-0000-0000-0000-000000000002 | 00000000-0000-0000-0000-000000019998 | 00000002-0000-0000-0000-000000000002 | 00009989-0000-0000-0000-000000019998
+(5 rows)
+
+-- tail
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid DESC LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 0 | | | |
+ 20002 | | | |
+ 20003 | | | |
+ 10009 | 00000000-0000-0000-0000-000000010008 | 00000000-0000-0000-0000-000000009992 | 00010008-0000-0000-0000-000000010008 | 00009992-0000-0000-0000-000000009992
+ 10008 | 00000000-0000-0000-0000-000000010007 | 00000000-0000-0000-0000-000000009993 | 00010007-0000-0000-0000-000000010007 | 00009993-0000-0000-0000-000000009993
+(5 rows)
+
+ROLLBACK;
+-- when no aborting, decreasing order
+BEGIN;
+SET LOCAL enable_indexscan = false;
+CLUSTER abbrev_abort_uuids USING abbrev_abort_uuids__noabort_decreasing_idx;
+-- head
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 20010 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 20001 | 00000000-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000 | 00009991-0000-0000-0000-000000020000 | 00000000-0000-0000-0000-000000000000
+ 9992 | 00000000-0000-0000-0000-000000009991 | 00000000-0000-0000-0000-000000010009 | 00009991-0000-0000-0000-000000009991 | 00000000-0000-0000-0000-000000010009
+ 20000 | 00000000-0000-0000-0000-000000019999 | 00000000-0000-0000-0000-000000000001 | 00009990-0000-0000-0000-000000019999 | 00000001-0000-0000-0000-000000000001
+ 9991 | 00000000-0000-0000-0000-000000009990 | 00000000-0000-0000-0000-000000010010 | 00009990-0000-0000-0000-000000009990 | 00000001-0000-0000-0000-000000010010
+(5 rows)
+
+-- tail
+SELECT id, abort_increasing, abort_decreasing, noabort_increasing, noabort_decreasing
+FROM abbrev_abort_uuids
+ORDER BY ctid DESC LIMIT 5;
+ id | abort_increasing | abort_decreasing | noabort_increasing | noabort_decreasing
+-------+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------
+ 0 | | | |
+ 20003 | | | |
+ 20002 | | | |
+ 9993 | 00000000-0000-0000-0000-000000009992 | 00000000-0000-0000-0000-000000010008 | 00009992-0000-0000-0000-000000009992 | 00010008-0000-0000-0000-000000010008
+ 9994 | 00000000-0000-0000-0000-000000009993 | 00000000-0000-0000-0000-000000010007 | 00009993-0000-0000-0000-000000009993 | 00010007-0000-0000-0000-000000010007
+(5 rows)
+
+ROLLBACK;
+----
+-- test forward and backward scans for in-memory and disk based tuplesort
+----
+-- in-memory
+BEGIN;
+SET LOCAL enable_indexscan = false;
+-- unfortunately can't show analyze output confirming sort method,
+-- the memory used output wouldn't be stable
+EXPLAIN (COSTS OFF) DECLARE c SCROLL CURSOR FOR SELECT noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing;
+ QUERY PLAN
+--------------------------------------
+ Sort
+ Sort Key: noabort_decreasing
+ -> Seq Scan on abbrev_abort_uuids
+(3 rows)
+
+DECLARE c SCROLL CURSOR FOR SELECT noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing;
+-- first and second
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+-- scroll beyond beginning
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+-- scroll beyond end end
+FETCH LAST FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+COMMIT;
+-- disk based
+BEGIN;
+SET LOCAL enable_indexscan = false;
+SET LOCAL work_mem = '100kB';
+-- unfortunately can't show analyze output confirming sort method,
+-- the memory used output wouldn't be stable
+EXPLAIN (COSTS OFF) DECLARE c SCROLL CURSOR FOR SELECT noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing;
+ QUERY PLAN
+--------------------------------------
+ Sort
+ Sort Key: noabort_decreasing
+ -> Seq Scan on abbrev_abort_uuids
+(3 rows)
+
+DECLARE c SCROLL CURSOR FOR SELECT noabort_decreasing FROM abbrev_abort_uuids ORDER BY noabort_decreasing;
+-- first and second
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+-- scroll beyond beginning
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------------------------
+ 00000000-0000-0000-0000-000000000000
+(1 row)
+
+-- scroll beyond end end
+FETCH LAST FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+FETCH BACKWARD FROM c;
+ noabort_decreasing
+--------------------
+
+(1 row)
+
+FETCH NEXT FROM c;
+ noabort_decreasing
+--------------------
+(0 rows)
+
+COMMIT;
+----
+-- test tuplesort using both in-memory and disk sort
+---
+-- memory based
+SELECT
+ -- fixed-width by-value datum
+ (array_agg(id ORDER BY id DESC NULLS FIRST))[0:5],
+ -- fixed-width by-ref datum
+ (array_agg(abort_increasing ORDER BY abort_increasing DESC NULLS LAST))[0:5],
+ -- variable-width datum
+ (array_agg(id::text ORDER BY id::text DESC NULLS LAST))[0:5],
+ -- fixed width by-value datum tuplesort
+ percentile_disc(0.99) WITHIN GROUP (ORDER BY id),
+ -- ensure state is shared
+ percentile_disc(0.01) WITHIN GROUP (ORDER BY id),
+ -- fixed width by-ref datum tuplesort
+ percentile_disc(0.8) WITHIN GROUP (ORDER BY abort_increasing),
+ -- variable width by-ref datum tuplesort
+ percentile_disc(0.2) WITHIN GROUP (ORDER BY id::text),
+ -- multi-column tuplesort
+ rank('00000000-0000-0000-0000-000000000000', '2', '2') WITHIN GROUP (ORDER BY noabort_increasing, id, id::text)
+FROM (
+ SELECT * FROM abbrev_abort_uuids
+ UNION ALL
+ SELECT NULL, NULL, NULL, NULL, NULL) s;
+ array_agg | array_agg | array_agg | percentile_disc | percentile_disc | percentile_disc | percentile_disc | rank
+--------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------+-----------------+-----------------+--------------------------------------+-----------------+------
+ {NULL,20010,20009,20008,20007} | {00000000-0000-0000-0000-000000020000,00000000-0000-0000-0000-000000020000,00000000-0000-0000-0000-000000019999,00000000-0000-0000-0000-000000019998,00000000-0000-0000-0000-000000019997} | {9999,9998,9997,9996,9995} | 19810 | 200 | 00000000-0000-0000-0000-000000016003 | 136 | 2
+(1 row)
+
+-- disk based (see also above)
+BEGIN;
+SET LOCAL work_mem = '100kB';
+SELECT
+ (array_agg(id ORDER BY id DESC NULLS FIRST))[0:5],
+ (array_agg(abort_increasing ORDER BY abort_increasing DESC NULLS LAST))[0:5],
+ (array_agg(id::text ORDER BY id::text DESC NULLS LAST))[0:5],
+ percentile_disc(0.99) WITHIN GROUP (ORDER BY id),
+ percentile_disc(0.01) WITHIN GROUP (ORDER BY id),
+ percentile_disc(0.8) WITHIN GROUP (ORDER BY abort_increasing),
+ percentile_disc(0.2) WITHIN GROUP (ORDER BY id::text),
+ rank('00000000-0000-0000-0000-000000000000', '2', '2') WITHIN GROUP (ORDER BY noabort_increasing, id, id::text)
+FROM (
+ SELECT * FROM abbrev_abort_uuids
+ UNION ALL
+ SELECT NULL, NULL, NULL, NULL, NULL) s;
+ array_agg | array_agg | array_agg | percentile_disc | percentile_disc | percentile_disc | percentile_disc | rank
+--------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------+-----------------+-----------------+--------------------------------------+-----------------+------
+ {NULL,20010,20009,20008,20007} | {00000000-0000-0000-0000-000000020000,00000000-0000-0000-0000-000000020000,00000000-0000-0000-0000-000000019999,00000000-0000-0000-0000-000000019998,00000000-0000-0000-0000-000000019997} | {9999,9998,9997,9996,9995} | 19810 | 200 | 00000000-0000-0000-0000-000000016003 | 136 | 2
+(1 row)
+
+ROLLBACK;
+----
+-- test tuplesort mark/restore
+---
+CREATE TEMP TABLE test_mark_restore(col1 int, col2 int, col12 int);
+-- need a few duplicates for mark/restore to matter
+INSERT INTO test_mark_restore(col1, col2, col12)
+ SELECT a.i, b.i, a.i * b.i FROM generate_series(1, 500) a(i), generate_series(1, 5) b(i);
+BEGIN;
+SET LOCAL enable_nestloop = off;
+SET LOCAL enable_hashjoin = off;
+SET LOCAL enable_material = off;
+-- set query into variable once, to avoid repetition of the fairly long query
+SELECT $$
+ SELECT col12, count(distinct a.col1), count(distinct a.col2), count(distinct b.col1), count(distinct b.col2), count(*)
+ FROM test_mark_restore a
+ JOIN test_mark_restore b USING(col12)
+ GROUP BY 1
+ HAVING count(*) > 1
+ ORDER BY 2 DESC, 1 DESC, 3 DESC, 4 DESC, 5 DESC, 6 DESC
+ LIMIT 10
+$$ AS qry \gset
+-- test mark/restore with in-memory sorts
+EXPLAIN (COSTS OFF) :qry;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Limit
+ -> Sort
+ Sort Key: (count(DISTINCT a.col1)) DESC, a.col12 DESC, (count(DISTINCT a.col2)) DESC, (count(DISTINCT b.col1)) DESC, (count(DISTINCT b.col2)) DESC, (count(*)) DESC
+ -> GroupAggregate
+ Group Key: a.col12
+ Filter: (count(*) > 1)
+ -> Merge Join
+ Merge Cond: (a.col12 = b.col12)
+ -> Sort
+ Sort Key: a.col12 DESC
+ -> Seq Scan on test_mark_restore a
+ -> Sort
+ Sort Key: b.col12 DESC
+ -> Seq Scan on test_mark_restore b
+(14 rows)
+
+:qry;
+ col12 | count | count | count | count | count
+-------+-------+-------+-------+-------+-------
+ 480 | 5 | 5 | 5 | 5 | 25
+ 420 | 5 | 5 | 5 | 5 | 25
+ 360 | 5 | 5 | 5 | 5 | 25
+ 300 | 5 | 5 | 5 | 5 | 25
+ 240 | 5 | 5 | 5 | 5 | 25
+ 180 | 5 | 5 | 5 | 5 | 25
+ 120 | 5 | 5 | 5 | 5 | 25
+ 60 | 5 | 5 | 5 | 5 | 25
+ 960 | 4 | 4 | 4 | 4 | 16
+ 900 | 4 | 4 | 4 | 4 | 16
+(10 rows)
+
+-- test mark/restore with on-disk sorts
+SET LOCAL work_mem = '100kB';
+EXPLAIN (COSTS OFF) :qry;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Limit
+ -> Sort
+ Sort Key: (count(DISTINCT a.col1)) DESC, a.col12 DESC, (count(DISTINCT a.col2)) DESC, (count(DISTINCT b.col1)) DESC, (count(DISTINCT b.col2)) DESC, (count(*)) DESC
+ -> GroupAggregate
+ Group Key: a.col12
+ Filter: (count(*) > 1)
+ -> Merge Join
+ Merge Cond: (a.col12 = b.col12)
+ -> Sort
+ Sort Key: a.col12 DESC
+ -> Seq Scan on test_mark_restore a
+ -> Sort
+ Sort Key: b.col12 DESC
+ -> Seq Scan on test_mark_restore b
+(14 rows)
+
+:qry;
+ col12 | count | count | count | count | count
+-------+-------+-------+-------+-------+-------
+ 480 | 5 | 5 | 5 | 5 | 25
+ 420 | 5 | 5 | 5 | 5 | 25
+ 360 | 5 | 5 | 5 | 5 | 25
+ 300 | 5 | 5 | 5 | 5 | 25
+ 240 | 5 | 5 | 5 | 5 | 25
+ 180 | 5 | 5 | 5 | 5 | 25
+ 120 | 5 | 5 | 5 | 5 | 25
+ 60 | 5 | 5 | 5 | 5 | 25
+ 960 | 4 | 4 | 4 | 4 | 16
+ 900 | 4 | 4 | 4 | 4 | 16
+(10 rows)
+
+COMMIT;
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-10 00:54:51 +0000