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|
SET @@GLOBAL.internal_tmp_mem_storage_engine = TempTable;
CREATE TABLE t_int (c INT);
CREATE TABLE t_char (c CHAR(20));
CREATE TABLE t_varchar (c VARCHAR(20));
CREATE TABLE t_text (c TEXT);
CREATE TABLE t_blob (c BLOB);
CREATE TABLE t_json (c JSON);
CREATE TABLE t_point (c POINT);
CREATE TABLE t_geom (c GEOMETRY);
INSERT INTO t_int VALUES
(1),
(2),
(2),
(3),
(4),
(NULL);
INSERT INTO t_char VALUES
('abcde'),
('fghij'),
('fghij'),
('klmno '),
('stxyz'),
(''),
(NULL);
INSERT INTO t_varchar VALUES
('abcde'),
('fghij'),
('fghij'),
('klmno '),
('stxyz'),
(''),
(NULL);
INSERT INTO t_text VALUES
('abcde'),
('fghij'),
('fghij'),
('klmno '),
('stxyz'),
(''),
(NULL);
INSERT INTO t_blob VALUES
('abcde'),
('fghij'),
('fghij'),
('klmno '),
('stxyz'),
(''),
(NULL);
INSERT INTO t_json VALUES
('{"k1": "value", "k2": [10, 20]}'),
('["hot", "cold"]'),
('["hot", "cold"]'),
('["a", "b", 1]'),
('{"key": "value"}'),
(NULL);
INSERT INTO t_point VALUES
(ST_PointFromText('POINT(10 10)')),
(ST_PointFromText('POINT(50 10)')),
(ST_PointFromText('POINT(50 10)')),
(ST_PointFromText('POINT(-1 -2)')),
(ST_PointFromText('POINT(10 50)')),
(NULL);
INSERT INTO t_geom VALUES
(ST_PointFromText('POINT(10 10)')),
(ST_MultiPointFromText('MULTIPOINT(0 0,10 10,10 20,20 20)')),
(ST_MultiPointFromText('MULTIPOINT(0 0,10 10,10 20,20 20)')),
(ST_PolygonFromText('POLYGON((10 10,20 10,20 20,10 20,10 10))')),
(ST_LineFromText('LINESTRING(0 0,0 10,10 0)')),
(NULL);
SHOW STATUS LIKE 'Created_tmp_tables';
Variable_name Value
Created_tmp_tables 0
SHOW STATUS LIKE 'Created_tmp_disk_tables';
Variable_name Value
Created_tmp_disk_tables 0
# ---------------------------------------------------------------------
# Scenario 1:
#
SELECT DISTINCT * FROM
t_int AS t1,
t_int AS t2;
c c
1 1
1 2
1 3
1 4
1 NULL
2 1
2 2
2 3
2 4
2 NULL
3 1
3 2
3 3
3 4
3 NULL
4 1
4 2
4 3
4 4
4 NULL
NULL 1
NULL 2
NULL 3
NULL 4
NULL NULL
SELECT DISTINCT * FROM
t_char AS t1,
t_char AS t2;
c c
NULL
abcde
fghij
klmno
stxyz
NULL
NULL NULL
NULL abcde
NULL fghij
NULL klmno
NULL stxyz
abcde
abcde NULL
abcde abcde
abcde fghij
abcde klmno
abcde stxyz
fghij
fghij NULL
fghij abcde
fghij fghij
fghij klmno
fghij stxyz
klmno
klmno NULL
klmno abcde
klmno fghij
klmno klmno
klmno stxyz
stxyz
stxyz NULL
stxyz abcde
stxyz fghij
stxyz klmno
stxyz stxyz
SELECT DISTINCT * FROM
t_varchar AS t1,
t_varchar AS t2;
c c
NULL
abcde
fghij
klmno
stxyz
NULL
NULL NULL
NULL abcde
NULL fghij
NULL klmno
NULL stxyz
abcde
abcde NULL
abcde abcde
abcde fghij
abcde klmno
abcde stxyz
fghij
fghij NULL
fghij abcde
fghij fghij
fghij klmno
fghij stxyz
klmno
klmno NULL
klmno abcde
klmno fghij
klmno klmno
klmno stxyz
stxyz
stxyz NULL
stxyz abcde
stxyz fghij
stxyz klmno
stxyz stxyz
SELECT DISTINCT * FROM
t_text AS t1,
t_text AS t2;
c c
NULL
abcde
fghij
klmno
stxyz
NULL
NULL NULL
NULL abcde
NULL fghij
NULL klmno
NULL stxyz
abcde
abcde NULL
abcde abcde
abcde fghij
abcde klmno
abcde stxyz
fghij
fghij NULL
fghij abcde
fghij fghij
fghij klmno
fghij stxyz
klmno
klmno NULL
klmno abcde
klmno fghij
klmno klmno
klmno stxyz
stxyz
stxyz NULL
stxyz abcde
stxyz fghij
stxyz klmno
stxyz stxyz
SELECT DISTINCT * FROM
t_blob AS t1,
t_blob AS t2;
c c
NULL
abcde
fghij
klmno
stxyz
NULL
NULL NULL
NULL abcde
NULL fghij
NULL klmno
NULL stxyz
abcde
abcde NULL
abcde abcde
abcde fghij
abcde klmno
abcde stxyz
fghij
fghij NULL
fghij abcde
fghij fghij
fghij klmno
fghij stxyz
klmno
klmno NULL
klmno abcde
klmno fghij
klmno klmno
klmno stxyz
stxyz
stxyz NULL
stxyz abcde
stxyz fghij
stxyz klmno
stxyz stxyz
SELECT DISTINCT * FROM
t_json AS t1,
t_json AS t2;
c c
NULL NULL
NULL ["a", "b", 1]
NULL ["hot", "cold"]
NULL {"k1": "value", "k2": [10, 20]}
NULL {"key": "value"}
["a", "b", 1] NULL
["a", "b", 1] ["a", "b", 1]
["a", "b", 1] ["hot", "cold"]
["a", "b", 1] {"k1": "value", "k2": [10, 20]}
["a", "b", 1] {"key": "value"}
["hot", "cold"] NULL
["hot", "cold"] ["a", "b", 1]
["hot", "cold"] ["hot", "cold"]
["hot", "cold"] {"k1": "value", "k2": [10, 20]}
["hot", "cold"] {"key": "value"}
{"k1": "value", "k2": [10, 20]} NULL
{"k1": "value", "k2": [10, 20]} ["a", "b", 1]
{"k1": "value", "k2": [10, 20]} ["hot", "cold"]
{"k1": "value", "k2": [10, 20]} {"k1": "value", "k2": [10, 20]}
{"k1": "value", "k2": [10, 20]} {"key": "value"}
{"key": "value"} NULL
{"key": "value"} ["a", "b", 1]
{"key": "value"} ["hot", "cold"]
{"key": "value"} {"k1": "value", "k2": [10, 20]}
{"key": "value"} {"key": "value"}
SELECT DISTINCT ST_AsText(t1.c),ST_AsText(t2.c) FROM
t_point AS t1,
t_point AS t2;
ST_AsText(t1.c) ST_AsText(t2.c)
NULL NULL
NULL POINT(-1 -2)
NULL POINT(10 10)
NULL POINT(10 50)
NULL POINT(50 10)
POINT(-1 -2) NULL
POINT(-1 -2) POINT(-1 -2)
POINT(-1 -2) POINT(10 10)
POINT(-1 -2) POINT(10 50)
POINT(-1 -2) POINT(50 10)
POINT(10 10) NULL
POINT(10 10) POINT(-1 -2)
POINT(10 10) POINT(10 10)
POINT(10 10) POINT(10 50)
POINT(10 10) POINT(50 10)
POINT(10 50) NULL
POINT(10 50) POINT(-1 -2)
POINT(10 50) POINT(10 10)
POINT(10 50) POINT(10 50)
POINT(10 50) POINT(50 10)
POINT(50 10) NULL
POINT(50 10) POINT(-1 -2)
POINT(50 10) POINT(10 10)
POINT(50 10) POINT(10 50)
POINT(50 10) POINT(50 10)
SELECT DISTINCT ST_AsText(t1.c),ST_AsText(t2.c) FROM
t_geom AS t1,
t_geom AS t2;
ST_AsText(t1.c) ST_AsText(t2.c)
LINESTRING(0 0,0 10,10 0) LINESTRING(0 0,0 10,10 0)
LINESTRING(0 0,0 10,10 0) MULTIPOINT((0 0),(10 10),(10 20),(20 20))
LINESTRING(0 0,0 10,10 0) NULL
LINESTRING(0 0,0 10,10 0) POINT(10 10)
LINESTRING(0 0,0 10,10 0) POLYGON((10 10,20 10,20 20,10 20,10 10))
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) LINESTRING(0 0,0 10,10 0)
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) MULTIPOINT((0 0),(10 10),(10 20),(20 20))
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) NULL
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) POINT(10 10)
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) POLYGON((10 10,20 10,20 20,10 20,10 10))
NULL LINESTRING(0 0,0 10,10 0)
NULL MULTIPOINT((0 0),(10 10),(10 20),(20 20))
NULL NULL
NULL POINT(10 10)
NULL POLYGON((10 10,20 10,20 20,10 20,10 10))
POINT(10 10) LINESTRING(0 0,0 10,10 0)
POINT(10 10) MULTIPOINT((0 0),(10 10),(10 20),(20 20))
POINT(10 10) NULL
POINT(10 10) POINT(10 10)
POINT(10 10) POLYGON((10 10,20 10,20 20,10 20,10 10))
POLYGON((10 10,20 10,20 20,10 20,10 10)) LINESTRING(0 0,0 10,10 0)
POLYGON((10 10,20 10,20 20,10 20,10 10)) MULTIPOINT((0 0),(10 10),(10 20),(20 20))
POLYGON((10 10,20 10,20 20,10 20,10 10)) NULL
POLYGON((10 10,20 10,20 20,10 20,10 10)) POINT(10 10)
POLYGON((10 10,20 10,20 20,10 20,10 10)) POLYGON((10 10,20 10,20 20,10 20,10 10))
# ---------------------------------------------------------------------
# Scenario 2:
#
SELECT c,COUNT(*) FROM t_int GROUP BY c;
c COUNT(*)
1 1
2 2
3 1
4 1
NULL 1
SELECT c,COUNT(*) FROM t_char GROUP BY c;
c COUNT(*)
1
NULL 1
abcde 1
fghij 2
klmno 1
stxyz 1
SELECT c,COUNT(*) FROM t_varchar GROUP BY c;
c COUNT(*)
1
NULL 1
abcde 1
fghij 2
klmno 1
stxyz 1
SELECT c,COUNT(*) FROM t_text GROUP BY c;
c COUNT(*)
1
NULL 1
abcde 1
fghij 2
klmno 1
stxyz 1
SELECT c,COUNT(*) FROM t_blob GROUP BY c;
c COUNT(*)
1
NULL 1
abcde 1
fghij 2
klmno 1
stxyz 1
SELECT c,COUNT(*) FROM t_json GROUP BY c;
c COUNT(*)
NULL 1
["a", "b", 1] 1
["hot", "cold"] 2
{"k1": "value", "k2": [10, 20]} 1
{"key": "value"} 1
SELECT ST_AsText(c),COUNT(*) FROM t_point GROUP BY c;
ST_AsText(c) COUNT(*)
NULL 1
POINT(-1 -2) 1
POINT(10 10) 1
POINT(10 50) 1
POINT(50 10) 2
SELECT ST_AsText(c),COUNT(*) FROM t_geom GROUP BY c;
ST_AsText(c) COUNT(*)
LINESTRING(0 0,0 10,10 0) 1
MULTIPOINT((0 0),(10 10),(10 20),(20 20)) 2
NULL 1
POINT(10 10) 1
POLYGON((10 10,20 10,20 20,10 20,10 10)) 1
SHOW STATUS LIKE 'Created_tmp_tables';
Variable_name Value
Created_tmp_tables 16
SHOW STATUS LIKE 'Created_tmp_disk_tables';
Variable_name Value
Created_tmp_disk_tables 0
DROP TABLE t_int;
DROP TABLE t_char;
DROP TABLE t_varchar;
DROP TABLE t_text;
DROP TABLE t_blob;
DROP TABLE t_json;
DROP TABLE t_point;
DROP TABLE t_geom;
CREATE TABLE t_pk (
pk INT NOT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t_pk VALUES
(1),
(2),
(3);
SELECT COUNT(t_pk.pk) FROM t_pk
WHERE 1 IN (SELECT 1 FROM t_pk AS SQ2_alias1
WHERE 1 IN (SELECT 1 FROM t_pk AS C_SQ1_alias1)
);
COUNT(t_pk.pk)
3
DROP TABLE t_pk;
CREATE TABLE t_json(json_col JSON);
INSERT INTO t_json VALUES (
'[
{ "name":"John Johnson", "nickname": {"stringValue": "Johnny"}},
{ "name":"John Smith"}
]'),
('[
{ "name":"John Smith"},
{ "name":"John Johnson", "nickname": {"stringValue": "Johnny"}}
]');
SELECT attrs.* FROM t_json, JSON_TABLE(json_col, '$[*]' COLUMNS (nickname JSON PATH '$.nickname')) as attrs;
nickname
{"stringValue": "Johnny"}
NULL
NULL
{"stringValue": "Johnny"}
DROP TABLE t_json;
#
# Bug #30677984: UNINITIALISED VALUE ERROR WITH VALGRIND IN SQL_TMP_TABLE.CC
#
CREATE TABLE t1 (
pk INTEGER NOT NULL,
f1 varchar(255)
);
INSERT INTO t1 VALUES (5,'N');
CREATE TABLE t2 (
pk int,
f2 varchar(10)
);
INSERT INTO t2 VALUES (5,'he');
INSERT INTO t2 VALUES (5,'l');
CREATE TABLE t3 (
f2 varchar(10),
f3 varchar(255)
);
INSERT INTO t3 VALUES ('L','2.0');
set optimizer_switch='block_nested_loop=off';
SELECT SUM(t3.f3)
FROM t1
LEFT JOIN t2 ON t1.pk = t2.pk
LEFT JOIN t3 ON t2.f2 = t3.f2
GROUP BY t1.f1;
SUM(t3.f3)
2
set optimizer_switch=default;
DROP TABLE t1, t2, t3;
#
# Bug #31116036: TEMPTABLE WASTES 1MB FOR EACH CONNECTION IN THREAD CACHE
#
truncate performance_schema.memory_summary_global_by_event_name;
select * from performance_schema.memory_summary_global_by_event_name where event_name like 'memory/temptable%';
EVENT_NAME COUNT_ALLOC COUNT_FREE SUM_NUMBER_OF_BYTES_ALLOC SUM_NUMBER_OF_BYTES_FREE LOW_COUNT_USED CURRENT_COUNT_USED HIGH_COUNT_USED LOW_NUMBER_OF_BYTES_USED CURRENT_NUMBER_OF_BYTES_USED HIGH_NUMBER_OF_BYTES_USED
memory/temptable/physical_disk 0 0 0 0 0 0 0 0 0 0
memory/temptable/physical_ram 1 0 1048608 0 1 1 1 1048608 1048608 1048608
# conn1
show variables like '%tmp_mem_storage%';
Variable_name Value
internal_tmp_mem_storage_engine TempTable
select * from performance_schema.memory_summary_global_by_event_name where event_name like 'memory/temptable%';
EVENT_NAME COUNT_ALLOC COUNT_FREE SUM_NUMBER_OF_BYTES_ALLOC SUM_NUMBER_OF_BYTES_FREE LOW_COUNT_USED CURRENT_COUNT_USED HIGH_COUNT_USED LOW_NUMBER_OF_BYTES_USED CURRENT_NUMBER_OF_BYTES_USED HIGH_NUMBER_OF_BYTES_USED
memory/temptable/physical_disk 0 0 0 0 0 0 0 0 0 0
memory/temptable/physical_ram 2 0 2097216 0 1 2 2 1048608 2097216 2097216
select * from performance_schema.memory_summary_global_by_event_name where event_name like 'memory/temptable%';
EVENT_NAME COUNT_ALLOC COUNT_FREE SUM_NUMBER_OF_BYTES_ALLOC SUM_NUMBER_OF_BYTES_FREE LOW_COUNT_USED CURRENT_COUNT_USED HIGH_COUNT_USED LOW_NUMBER_OF_BYTES_USED CURRENT_NUMBER_OF_BYTES_USED HIGH_NUMBER_OF_BYTES_USED
memory/temptable/physical_disk 0 0 0 0 0 0 0 0 0 0
memory/temptable/physical_ram 2 0 2097216 0 1 2 2 1048608 2097216 2097216
select * from performance_schema.memory_summary_global_by_event_name where event_name like 'memory/temptable%';
EVENT_NAME COUNT_ALLOC COUNT_FREE SUM_NUMBER_OF_BYTES_ALLOC SUM_NUMBER_OF_BYTES_FREE LOW_COUNT_USED CURRENT_COUNT_USED HIGH_COUNT_USED LOW_NUMBER_OF_BYTES_USED CURRENT_NUMBER_OF_BYTES_USED HIGH_NUMBER_OF_BYTES_USED
memory/temptable/physical_disk 0 0 0 0 0 0 0 0 0 0
memory/temptable/physical_ram 2 1 2097216 1048608 1 1 2 1048608 1048608 2097216
#
# Bug #31091089 TEMPTABLE: ASSERTION `P - M_MYSQL_BUF < M_LENGTH' FAILED.
#
CREATE TABLE t1 (
f1 CHAR(0) NOT NULL,
f2 INT NOT NULL
);
INSERT INTO t1(f1, f2) VALUES('', 1);
SELECT AVG(f1) from t1 GROUP BY f2, f1;
AVG(f1)
0
DROP TABLE t1;
SET @@GLOBAL.internal_tmp_mem_storage_engine = default;
|
