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Commit bdab8b74 authored by Varun Gupta's avatar Varun Gupta
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MDEV-11274: Executing EXPLAIN of complex query over join limit causes server to crash 

For this case we have a view that is mergeable but we are not able to merge it in the
parent select because that would exceed the maximum tables allowed in the join list, so we
materialise this view
TABLE_LIST::dervied is NULL for such views, it is only set for views which have ALGORITHM=TEMPTABLE
Fixed by making sure TABLE_LIST::derived is set for views that could not be merged
parent e8c2366b
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mysql-test/r/view.result
View file @ bdab8b74
......@@ -5535,6 +5535,203 @@ View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select group_concat(`t1`.`str` separator '\\') AS `GROUP_CONCAT(str SEPARATOR '\\')` from `t1` latin1 latin1_swedish_ci
drop view v1;
drop table t1;
CREATE TABLE IF NOT EXISTS t0 (f0 INT);
CREATE TABLE IF NOT EXISTS t1 (f1 INT);
CREATE TABLE IF NOT EXISTS t2 (f2 INT);
CREATE TABLE IF NOT EXISTS t3 (f3 INT);
CREATE TABLE IF NOT EXISTS t4 (f4 INT);
CREATE TABLE IF NOT EXISTS t5 (f5 INT);
CREATE TABLE IF NOT EXISTS t6 (f6 INT);
CREATE TABLE IF NOT EXISTS t7 (f7 INT);
CREATE TABLE IF NOT EXISTS t8 (f8 INT);
CREATE TABLE IF NOT EXISTS t9 (f9 INT);
CREATE TABLE IF NOT EXISTS t10 (f10 INT);
CREATE TABLE IF NOT EXISTS t11 (f11 INT);
CREATE TABLE IF NOT EXISTS t12 (f12 INT);
CREATE TABLE IF NOT EXISTS t13 (f13 INT);
CREATE TABLE IF NOT EXISTS t14 (f14 INT);
CREATE TABLE IF NOT EXISTS t15 (f15 INT);
CREATE TABLE IF NOT EXISTS t16 (f16 INT);
CREATE TABLE IF NOT EXISTS t17 (f17 INT);
CREATE TABLE IF NOT EXISTS t18 (f18 INT);
CREATE TABLE IF NOT EXISTS t19 (f19 INT);
CREATE TABLE IF NOT EXISTS t20 (f20 INT);
CREATE TABLE IF NOT EXISTS t21 (f21 INT);
CREATE TABLE IF NOT EXISTS t22 (f22 INT);
CREATE TABLE IF NOT EXISTS t23 (f23 INT);
CREATE TABLE IF NOT EXISTS t24 (f24 INT);
CREATE TABLE IF NOT EXISTS t25 (f25 INT);
CREATE TABLE IF NOT EXISTS t26 (f26 INT);
CREATE TABLE IF NOT EXISTS t27 (f27 INT);
CREATE TABLE IF NOT EXISTS t28 (f28 INT);
CREATE TABLE IF NOT EXISTS t29 (f29 INT);
CREATE TABLE IF NOT EXISTS t30 (f30 INT);
CREATE TABLE IF NOT EXISTS t31 (f31 INT);
CREATE TABLE IF NOT EXISTS t32 (f32 INT);
CREATE TABLE IF NOT EXISTS t33 (f33 INT);
CREATE TABLE IF NOT EXISTS t34 (f34 INT);
CREATE TABLE IF NOT EXISTS t35 (f35 INT);
CREATE TABLE IF NOT EXISTS t36 (f36 INT);
CREATE TABLE IF NOT EXISTS t37 (f37 INT);
CREATE TABLE IF NOT EXISTS t38 (f38 INT);
CREATE TABLE IF NOT EXISTS t39 (f39 INT);
CREATE TABLE IF NOT EXISTS t40 (f40 INT);
CREATE TABLE IF NOT EXISTS t41 (f41 INT);
CREATE TABLE IF NOT EXISTS t42 (f42 INT);
CREATE TABLE IF NOT EXISTS t43 (f43 INT);
CREATE TABLE IF NOT EXISTS t44 (f44 INT);
CREATE TABLE IF NOT EXISTS t45 (f45 INT);
CREATE TABLE IF NOT EXISTS t46 (f46 INT);
CREATE TABLE IF NOT EXISTS t47 (f47 INT);
CREATE TABLE IF NOT EXISTS t48 (f48 INT);
CREATE TABLE IF NOT EXISTS t49 (f49 INT);
CREATE TABLE IF NOT EXISTS t50 (f50 INT);
CREATE TABLE IF NOT EXISTS t51 (f51 INT);
CREATE TABLE IF NOT EXISTS t52 (f52 INT);
CREATE TABLE IF NOT EXISTS t53 (f53 INT);
CREATE TABLE IF NOT EXISTS t54 (f54 INT);
CREATE TABLE IF NOT EXISTS t55 (f55 INT);
CREATE TABLE IF NOT EXISTS t56 (f56 INT);
CREATE TABLE IF NOT EXISTS t57 (f57 INT);
CREATE TABLE IF NOT EXISTS t58 (f58 INT);
CREATE TABLE IF NOT EXISTS t59 (f59 INT);
CREATE TABLE IF NOT EXISTS t60 (f60 INT);
CREATE OR REPLACE VIEW v60 AS SELECT * FROM t60;
EXPLAIN
SELECT t0.*
FROM t0
JOIN t1
ON t1.f1 = t0.f0
LEFT JOIN t2
ON t0.f0 = t2.f2
LEFT JOIN t3
ON t0.f0 = t3.f3
LEFT JOIN t4
ON t0.f0 = t4.f4
LEFT JOIN t5
ON t4.f4 = t5.f5
LEFT JOIN t6
ON t0.f0 = t6.f6
LEFT JOIN t7
ON t0.f0 = t7.f7
LEFT JOIN t8
ON t0.f0 = t8.f8
LEFT JOIN t9
ON t0.f0 = t9.f9
LEFT JOIN t10
ON t0.f0 = t10.f10
LEFT JOIN t11
ON t0.f0 = t11.f11
LEFT JOIN t12
ON t0.f0 = t12.f12
LEFT JOIN t13
ON t0.f0 = t13.f13
LEFT JOIN t14
ON t0.f0 = t14.f14
LEFT JOIN t15
ON t0.f0 = t15.f15
LEFT JOIN t16
ON t0.f0 = t16.f16
LEFT JOIN t17
ON t0.f0 = t17.f17
LEFT JOIN t18
ON t0.f0 = t18.f18
LEFT JOIN t19
ON t18.f18 = t19.f19
LEFT JOIN t20
ON t20.f20 = t19.f19
LEFT JOIN t21
ON t20.f20 = t21.f21
LEFT JOIN t22
ON t19.f19 = t22.f22
LEFT JOIN t23
ON t23.f23 = t0.f0
LEFT JOIN t24
ON t24.f24 = t23.f23
LEFT JOIN t25
ON t0.f0 = t25.f25
LEFT JOIN t26
ON t26.f26 = t0.f0
LEFT JOIN t27
ON t27.f27 = t0.f0
LEFT JOIN t28
ON t0.f0 = t28.f28
LEFT JOIN t29
ON t0.f0 = t29.f29
LEFT JOIN t30
ON t30.f30 = t0.f0
LEFT JOIN t31
ON t0.f0 = t31.f31
LEFT JOIN t32
ON t32.f32 = t31.f31
LEFT JOIN t33
ON t33.f33 = t0.f0
LEFT JOIN t34
ON t33.f33 = t34.f34
LEFT JOIN t35
ON t33.f33 = t35.f35
LEFT JOIN t36
ON t36.f36 = t0.f0
LEFT JOIN t37
ON t32.f32 = t37.f37
LEFT JOIN t38
ON t31.f31 = t38.f38
LEFT JOIN t39
ON t39.f39 = t0.f0
LEFT JOIN t40
ON t40.f40 = t39.f39
LEFT JOIN t41
ON t41.f41 = t0.f0
LEFT JOIN t42
ON t42.f42 = t41.f41
LEFT JOIN t43
ON t43.f43 = t41.f41
LEFT JOIN t44
ON t44.f44 = t0.f0
LEFT JOIN t45
ON t45.f45 = t0.f0
LEFT JOIN t46
ON t46.f46 = t0.f0
LEFT JOIN t47
ON t47.f47 = t0.f0
LEFT JOIN t48
ON t48.f48 = t0.f0
LEFT JOIN t49
ON t0.f0 = t49.f49
LEFT JOIN t50
ON t0.f0 = t50.f50
LEFT JOIN t51
ON t0.f0 = t51.f51
LEFT JOIN t52
ON t52.f52 = t0.f0
LEFT JOIN t53
ON t53.f53 = t0.f0
LEFT JOIN t54
ON t54.f54 = t0.f0
LEFT JOIN t55
ON t55.f55 = t0.f0
LEFT JOIN t56
ON t56.f56 = t0.f0
LEFT JOIN t57
ON t57.f57 = t0.f0
LEFT JOIN t58
ON t58.f58 = t57.f57
LEFT JOIN t59
ON t36.f36 = t59.f59
LEFT JOIN v60
ON t36.f36 = v60.f60
;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table
drop table t0, t1, t2, t3, t4, t5, t6, t7, t8, t9,
t10, t11, t12, t13, t14, t15, t16, t17, t18,
t19, t20, t21, t22, t23, t24, t25, t26, t27,
t28, t29, t30, t31, t32, t33, t34, t35, t36,
t37, t38, t39, t40, t41, t42, t43, t44, t45,
t46, t47, t48, t49, t50, t51, t52, t53, t54,
t55, t56, t57, t58, t59,t60;
drop view v60;
# -----------------------------------------------------------------
# -- End of 5.5 tests.
# -----------------------------------------------------------------
......
mysql-test/t/view.test
View file @ bdab8b74
......@@ -5478,6 +5478,202 @@ SHOW CREATE VIEW v1;
drop view v1;
drop table t1;
CREATE TABLE IF NOT EXISTS t0 (f0 INT);
CREATE TABLE IF NOT EXISTS t1 (f1 INT);
CREATE TABLE IF NOT EXISTS t2 (f2 INT);
CREATE TABLE IF NOT EXISTS t3 (f3 INT);
CREATE TABLE IF NOT EXISTS t4 (f4 INT);
CREATE TABLE IF NOT EXISTS t5 (f5 INT);
CREATE TABLE IF NOT EXISTS t6 (f6 INT);
CREATE TABLE IF NOT EXISTS t7 (f7 INT);
CREATE TABLE IF NOT EXISTS t8 (f8 INT);
CREATE TABLE IF NOT EXISTS t9 (f9 INT);
CREATE TABLE IF NOT EXISTS t10 (f10 INT);
CREATE TABLE IF NOT EXISTS t11 (f11 INT);
CREATE TABLE IF NOT EXISTS t12 (f12 INT);
CREATE TABLE IF NOT EXISTS t13 (f13 INT);
CREATE TABLE IF NOT EXISTS t14 (f14 INT);
CREATE TABLE IF NOT EXISTS t15 (f15 INT);
CREATE TABLE IF NOT EXISTS t16 (f16 INT);
CREATE TABLE IF NOT EXISTS t17 (f17 INT);
CREATE TABLE IF NOT EXISTS t18 (f18 INT);
CREATE TABLE IF NOT EXISTS t19 (f19 INT);
CREATE TABLE IF NOT EXISTS t20 (f20 INT);
CREATE TABLE IF NOT EXISTS t21 (f21 INT);
CREATE TABLE IF NOT EXISTS t22 (f22 INT);
CREATE TABLE IF NOT EXISTS t23 (f23 INT);
CREATE TABLE IF NOT EXISTS t24 (f24 INT);
CREATE TABLE IF NOT EXISTS t25 (f25 INT);
CREATE TABLE IF NOT EXISTS t26 (f26 INT);
CREATE TABLE IF NOT EXISTS t27 (f27 INT);
CREATE TABLE IF NOT EXISTS t28 (f28 INT);
CREATE TABLE IF NOT EXISTS t29 (f29 INT);
CREATE TABLE IF NOT EXISTS t30 (f30 INT);
CREATE TABLE IF NOT EXISTS t31 (f31 INT);
CREATE TABLE IF NOT EXISTS t32 (f32 INT);
CREATE TABLE IF NOT EXISTS t33 (f33 INT);
CREATE TABLE IF NOT EXISTS t34 (f34 INT);
CREATE TABLE IF NOT EXISTS t35 (f35 INT);
CREATE TABLE IF NOT EXISTS t36 (f36 INT);
CREATE TABLE IF NOT EXISTS t37 (f37 INT);
CREATE TABLE IF NOT EXISTS t38 (f38 INT);
CREATE TABLE IF NOT EXISTS t39 (f39 INT);
CREATE TABLE IF NOT EXISTS t40 (f40 INT);
CREATE TABLE IF NOT EXISTS t41 (f41 INT);
CREATE TABLE IF NOT EXISTS t42 (f42 INT);
CREATE TABLE IF NOT EXISTS t43 (f43 INT);
CREATE TABLE IF NOT EXISTS t44 (f44 INT);
CREATE TABLE IF NOT EXISTS t45 (f45 INT);
CREATE TABLE IF NOT EXISTS t46 (f46 INT);
CREATE TABLE IF NOT EXISTS t47 (f47 INT);
CREATE TABLE IF NOT EXISTS t48 (f48 INT);
CREATE TABLE IF NOT EXISTS t49 (f49 INT);
CREATE TABLE IF NOT EXISTS t50 (f50 INT);
CREATE TABLE IF NOT EXISTS t51 (f51 INT);
CREATE TABLE IF NOT EXISTS t52 (f52 INT);
CREATE TABLE IF NOT EXISTS t53 (f53 INT);
CREATE TABLE IF NOT EXISTS t54 (f54 INT);
CREATE TABLE IF NOT EXISTS t55 (f55 INT);
CREATE TABLE IF NOT EXISTS t56 (f56 INT);
CREATE TABLE IF NOT EXISTS t57 (f57 INT);
CREATE TABLE IF NOT EXISTS t58 (f58 INT);
CREATE TABLE IF NOT EXISTS t59 (f59 INT);
CREATE TABLE IF NOT EXISTS t60 (f60 INT);
CREATE OR REPLACE VIEW v60 AS SELECT * FROM t60;
EXPLAIN
SELECT t0.*
FROM t0
JOIN t1
ON t1.f1 = t0.f0
LEFT JOIN t2
ON t0.f0 = t2.f2
LEFT JOIN t3
ON t0.f0 = t3.f3
LEFT JOIN t4
ON t0.f0 = t4.f4
LEFT JOIN t5
ON t4.f4 = t5.f5
LEFT JOIN t6
ON t0.f0 = t6.f6
LEFT JOIN t7
ON t0.f0 = t7.f7
LEFT JOIN t8
ON t0.f0 = t8.f8
LEFT JOIN t9
ON t0.f0 = t9.f9
LEFT JOIN t10
ON t0.f0 = t10.f10
LEFT JOIN t11
ON t0.f0 = t11.f11
LEFT JOIN t12
ON t0.f0 = t12.f12
LEFT JOIN t13
ON t0.f0 = t13.f13
LEFT JOIN t14
ON t0.f0 = t14.f14
LEFT JOIN t15
ON t0.f0 = t15.f15
LEFT JOIN t16
ON t0.f0 = t16.f16
LEFT JOIN t17
ON t0.f0 = t17.f17
LEFT JOIN t18
ON t0.f0 = t18.f18
LEFT JOIN t19
ON t18.f18 = t19.f19
LEFT JOIN t20
ON t20.f20 = t19.f19
LEFT JOIN t21
ON t20.f20 = t21.f21
LEFT JOIN t22
ON t19.f19 = t22.f22
LEFT JOIN t23
ON t23.f23 = t0.f0
LEFT JOIN t24
ON t24.f24 = t23.f23
LEFT JOIN t25
ON t0.f0 = t25.f25
LEFT JOIN t26
ON t26.f26 = t0.f0
LEFT JOIN t27
ON t27.f27 = t0.f0
LEFT JOIN t28
ON t0.f0 = t28.f28
LEFT JOIN t29
ON t0.f0 = t29.f29
LEFT JOIN t30
ON t30.f30 = t0.f0
LEFT JOIN t31
ON t0.f0 = t31.f31
LEFT JOIN t32
ON t32.f32 = t31.f31
LEFT JOIN t33
ON t33.f33 = t0.f0
LEFT JOIN t34
ON t33.f33 = t34.f34
LEFT JOIN t35
ON t33.f33 = t35.f35
LEFT JOIN t36
ON t36.f36 = t0.f0
LEFT JOIN t37
ON t32.f32 = t37.f37
LEFT JOIN t38
ON t31.f31 = t38.f38
LEFT JOIN t39
ON t39.f39 = t0.f0
LEFT JOIN t40
ON t40.f40 = t39.f39
LEFT JOIN t41
ON t41.f41 = t0.f0
LEFT JOIN t42
ON t42.f42 = t41.f41
LEFT JOIN t43
ON t43.f43 = t41.f41
LEFT JOIN t44
ON t44.f44 = t0.f0
LEFT JOIN t45
ON t45.f45 = t0.f0
LEFT JOIN t46
ON t46.f46 = t0.f0
LEFT JOIN t47
ON t47.f47 = t0.f0
LEFT JOIN t48
ON t48.f48 = t0.f0
LEFT JOIN t49
ON t0.f0 = t49.f49
LEFT JOIN t50
ON t0.f0 = t50.f50
LEFT JOIN t51
ON t0.f0 = t51.f51
LEFT JOIN t52
ON t52.f52 = t0.f0
LEFT JOIN t53
ON t53.f53 = t0.f0
LEFT JOIN t54
ON t54.f54 = t0.f0
LEFT JOIN t55
ON t55.f55 = t0.f0
LEFT JOIN t56
ON t56.f56 = t0.f0
LEFT JOIN t57
ON t57.f57 = t0.f0
LEFT JOIN t58
ON t58.f58 = t57.f57
LEFT JOIN t59
ON t36.f36 = t59.f59
LEFT JOIN v60
ON t36.f36 = v60.f60
;
drop table t0, t1, t2, t3, t4, t5, t6, t7, t8, t9,
t10, t11, t12, t13, t14, t15, t16, t17, t18,
t19, t20, t21, t22, t23, t24, t25, t26, t27,
t28, t29, t30, t31, t32, t33, t34, t35, t36,
t37, t38, t39, t40, t41, t42, t43, t44, t45,
t46, t47, t48, t49, t50, t51, t52, t53, t54,
t55, t56, t57, t58, t59,t60;
drop view v60;
--echo # -----------------------------------------------------------------
--echo # -- End of 5.5 tests.
--echo # -----------------------------------------------------------------
......
sql/table.h
View file @ bdab8b74
......@@ -2125,6 +2125,7 @@ struct TABLE_LIST
DBUG_PRINT("enter", ("Alias: '%s' Unit: %p",
(alias ? alias : "<NULL>"),
get_unit()));
derived= get_unit();
derived_type= ((derived_type & (derived ? DTYPE_MASK : DTYPE_VIEW)) |
DTYPE_TABLE | DTYPE_MATERIALIZE);
set_check_materialized();
......
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