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Ensure that test_quick_select doesn't return more rows than in the table

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Other changes:
- In test_quick_select(), assume that if table->used_stats_records is 0
  then the table has 0 rows.
- Fixed prepare_simple_select() to populate table->used_stat_records
- Enusre that set_statistics_for_tables() doesn't cause used_stats_records
  to be 0 when using stat_tables.
- To get blackhole to work with replication, set stats.records to 2 so
  that test_quick_select() doesn't assume the table is empty.
This commit is contained in:
Monty
2021-10-05 17:08:16 +03:00
committed by Sergei Petrunia
parent 8b977a6c3a
commit c443dbff0e
16 changed files with 85 additions and 50 deletions
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13
mysql-test/main/sql_safe_updates.result
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@ -9,18 +9,23 @@ select @@sql_safe_updates;
#
create table t1 (a int, b int, primary key (a), key (b));
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
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 ALL NULL NULL NULL NULL 1 Using where
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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
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 t1 ALL NULL NULL NULL NULL 1 Using where
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