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MDEV-20403 Assertion 0' or Assertion btr_validate_index(index, 0)' failed in row_upd_sec_index_entry or error code 126: Index is corrupted upon UPDATE with TIMESTAMP..ON UPDATE

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Three issues here:
* ON UPDATE DEFAULT NOW columns were updated after generated columns
  were computed - this broke indexed virtual columns
* ON UPDATE DEFAULT NOW columns were updated after BEFORE triggers,
  so triggers didn't see the correct NEW value
* in case of a multi-update generated columns were also updated
  after BEFORE triggers
This commit is contained in:
Sergei Golubchik
2019-09-02 14:10:20 +02:00
parent 3789692d17
commit c7c481f4d9
4 changed files with 65 additions and 14 deletions
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23
mysql-test/r/function_defaults.result
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@ -3093,3 +3093,26 @@ a b
1999-12-01 11:22:33.000000 1999-12-01 11:22:33.000000
2001-09-09 04:46:40.000000 2001-09-09 04:46:40.000000
DROP TABLE t1;
create table t1 (t timestamp, i int, v timestamp as (t) virtual, key(v));
insert t1 (t,i) values ('2006-03-01 23:59:59',1);
update t1 set i = 2;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
drop table t1;
create table t1 (t timestamp, i int);
create trigger tr1 before update on t1 for each row set @new:=new.t;
insert t1 (t,i) values ('2006-03-01 23:59:59', 1);
update t1 set i = 2;
select if(@new = t, 'correct', 'wrong') from t1;
if(@new = t, 'correct', 'wrong')
correct
drop table t1;
create table t1 (i int, j int as (i));
create trigger tr1 before update on t1 for each row set @new:=new.j;
insert t1 (i) values (1);
update t1, t1 as t2 set t1.i = 2;
select if(@new = j, 'correct', 'wrong') from t1;
if(@new = j, 'correct', 'wrong')
correct
drop table t1;