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MDEV-21555 Assertion secondary index is out of sync on delete from versioned table

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Delete-marked record is on the secondary index and the clustered index
already purged the corresponding record. We cannot detect if such
record is historical and we should not: the algorithm of
row_ins_check_foreign_constraint() skips such record anyway.
This commit is contained in:
Aleksey Midenkov
2021-07-19 22:17:51 +03:00
parent dc3a350df6
commit 1b45e05cce
3 changed files with 48 additions and 17 deletions
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13
mysql-test/suite/versioning/r/foreign.result
View File

@ -443,3 +443,16 @@ pk f1 f2 left(f3, 4) check_row_ts(row_start, row_end)
1 8 8 SHOR HISTORICAL ROW
2 8 8 LONG HISTORICAL ROW
drop table t1;
#
# MDEV-21555 Assertion secondary index is out of sync on delete from versioned table
#
create table t1 (a int, b int as (a + 1) virtual, key(a)) engine=innodb with system versioning;
set foreign_key_checks= off;
insert into t1 (a) values (1), (2);
alter table t1 add foreign key (b) references t1 (a), algorithm=copy;
update t1 set a= null where a = 1;
delete from t1 where a is null;
set foreign_key_checks= on;
delete history from t1;
delete from t1;
drop table t1;

18
mysql-test/suite/versioning/t/foreign.test
View File

@ -476,4 +476,22 @@ select pk, f1, f2, left(f3, 4), check_row_ts(row_start, row_end) from t1 for sys
# cleanup
drop table t1;
--echo #
--echo # MDEV-21555 Assertion secondary index is out of sync on delete from versioned table
--echo #
create table t1 (a int, b int as (a + 1) virtual, key(a)) engine=innodb with system versioning;
set foreign_key_checks= off;
insert into t1 (a) values (1), (2);
alter table t1 add foreign key (b) references t1 (a), algorithm=copy;
update t1 set a= null where a = 1;
delete from t1 where a is null;
set foreign_key_checks= on;
delete history from t1;
delete from t1;
# cleanup
drop table t1;
--source suite/versioning/common_finish.inc

34
storage/innobase/row/row0ins.cc
View File

@ -1666,23 +1666,6 @@ row_ins_check_foreign_constraint(
cmp = cmp_dtuple_rec(entry, rec, offsets);
if (cmp == 0) {
if (check_table->versioned()) {
bool history_row = false;
if (check_index->is_primary()) {
history_row = check_index->
vers_history_row(rec, offsets);
} else if (check_index->
vers_history_row(rec, history_row))
{
break;
}
if (history_row) {
continue;
}
}
if (rec_get_deleted_flag(rec,
rec_offs_comp(offsets))) {
/* In delete-marked records, DB_TRX_ID must
@ -1704,6 +1687,23 @@ row_ins_check_foreign_constraint(
goto end_scan;
}
} else {
if (check_table->versioned()) {
bool history_row = false;
if (check_index->is_primary()) {
history_row = check_index->
vers_history_row(rec,
offsets);
} else if (check_index->
vers_history_row(rec,
history_row)) {
break;
}
if (history_row) {
continue;
}
}
/* Found a matching record. Lock only
a record because we can allow inserts
into gaps */