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#
# MDEV-14429 sql_safe_updates in my.cnf not work
#
select @@sql_safe_updates;
@@sql_safe_updates
1
#
# MDEV-18304 sql_safe_updates does not work with OR clauses
#
create table t1 (a int, b int, primary key (a), key (b));
update t1 set b=2 where a=1 or b=2;
explain update t1 set b=2 where a=1 or b=2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
delete from t1 where a=1 or b=2;
explain delete from t1 where a=1 or b=2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8);
explain update t1 set b=2 where a=1 or b=2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge PRIMARY,b PRIMARY,b 4,5 NULL 2 Using union(PRIMARY,b); Using where; Using buffer
update t1 set b=2 where a=1 or b=2;
set @@optimizer_switch="index_merge=off";
update t1 set b=2 where a=1 or b=2;
ERROR HY000: You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column
delete from t1 where a=1 or b=2;
ERROR HY000: You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column
drop table t1;
#
# End of 10.3 tests
#
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