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MDEV-14440: Assertion `inited==RND' failed in handler::ha_rnd_end

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In the function QUICK_RANGE_SELECT::init_ror_merged_scan we create a seperate handler if the handler in
head->file cannot be reused. The flag free_file tells us if we have a seperate handler or not.
There are cases where you might create a handler and then there might be a failure(running ALTER)
and then we have to revert the handler back to the original one. The code does that
but it does not reset the flag 'free_file' in this case.
Also backported f2c418079d.
This commit is contained in:
Varun Gupta
2019-01-17 22:56:12 +02:00
parent 19a7656fb1
commit 2061e00c20
3 changed files with 52 additions and 0 deletions
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24
mysql-test/r/range_innodb.result
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@ -55,3 +55,27 @@ pk f1 f2 f3 pk f1 f2 f3 f4 f5
2 6 v NULL 14 1 q NULL 4 q
3 7 c NULL 14 1 q NULL 4 q
drop table t1,t2;
#
# MDEV-14440: Server crash in in handler::ha_external_lock or Assertion `inited==RND'
# failed in handler::ha_rnd_end upon SELECT from partitioned table
#
set @optimizer_switch_save= @@optimizer_switch;
set optimizer_switch='index_merge_sort_intersection=off';
create table t0 (a int)engine=innodb;
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int, b int, c int,
key(a),key(b),key(c)
)engine=innodb;
insert into t1
select A.a+10*B.a, A.a+10*B.a, A.a+10*B.a+100*C.a
from t0 A, t0 B, t0 C, t0 D where D.a<5;
set @@global.debug_dbug="+d,ha_index_init_fail";
explain select * from t1 where a=10 and b=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where
select * from t1 where a=10 and b=10;
ERROR HY000: Table definition has changed, please retry transaction
DROP TABLE t0,t1;
set @@global.debug_dbug="-d";
set @@optimizer_switch= @optimizer_switch_save;