#
# MDEV-37199 UNIQUE KEY USING HASH accepting duplicate records
#
## INSERT
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
# Keep a Read View open to prevent purge
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
# Create delete marked secondary index Record ('a', 10)
insert t1 values(10, 'a');
delete from t1;
# Insert secondary index key ('a', 15) in the GAP between ('a', 10) and Supremum
set transaction isolation level read committed;
set debug_sync="innodb_row_ins_step_enter SIGNAL checked_duplicate WAIT_FOR do_insert";
insert t1 values(15, 'a');
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
# Insert secondary index key ('a', 5) in the GAP between Infimum and ('a', 10)
set transaction isolation level read committed;
insert t1 values(5, 'a');
set debug_sync="now SIGNAL do_insert";
connection con1;
ERROR 23000: Duplicate entry 'a' for key 'col2'
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## INSERT, row-level locking proof
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
# Keep a Read View open to prevent purge
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
# Create delete marked secondary index Record ('a', 10)
insert t1 values(10, 'a');
delete from t1;
# Insert secondary index key ('a', 15) in the GAP between ('a', 10) and Supremum
set transaction isolation level read committed;
set debug_sync="ha_write_row_end SIGNAL checked_duplicate WAIT_FOR do_insert";
insert t1 values(15, 'a');
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
# Insert secondary index key ('a', 5) in the GAP between Infimum and ('a', 10)
set session innodb_lock_wait_timeout= 1;
set transaction isolation level read committed;
insert t1 values(5, 'a');
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
set debug_sync="now SIGNAL do_insert";
connection con1;
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
15	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## UPDATE
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
insert into t1 values(10, 'a');
delete from t1;
insert into t1 values( 5, 'b');
insert into t1 values(15, 'c');
set transaction isolation level read committed;
set debug_sync="innodb_row_update_for_mysql_begin SIGNAL checked_duplicate WAIT_FOR do_insert";
update t1 set col2='a' where col1=5;
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
set transaction isolation level read committed;
update t1 set col2='a' where col1=15;
set debug_sync="now SIGNAL do_insert";
connection con1;
ERROR 23000: Duplicate entry 'a' for key 'col2'
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	b
15	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## INSERT IGNORE
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
insert t1 values(10, 'a');
delete from t1;
set transaction isolation level read committed;
set debug_sync="innodb_row_ins_step_enter SIGNAL checked_duplicate WAIT_FOR do_insert";
insert ignore t1 values(15, 'a'), (16, 'b');
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
set transaction isolation level read committed;
insert t1 values(5, 'a');
set debug_sync="now SIGNAL do_insert";
connection con1;
Warnings:
Warning	1062	Duplicate entry 'a' for key 'col2'
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	a
16	b
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## UPDATE IGNORE
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
insert into t1 values(10, 'a');
delete from t1;
insert into t1 values( 5, 'b');
insert into t1 values(15, 'c');
insert into t1 values( 9, 'd');
set transaction isolation level read committed;
set debug_sync="innodb_row_update_for_mysql_begin SIGNAL checked_duplicate WAIT_FOR do_insert";
update ignore t1 set col2=chr(92+col1) where col1<=9;
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
set transaction isolation level read committed;
update t1 set col2='a' where col1=15;
set debug_sync="now SIGNAL do_insert";
connection con1;
ERROR 42000: UPDATE IGNORE in READ COMMITTED isolation mode of a table with a UNIQUE constraint USING HASH is not currently supported
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	b
9	d
15	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## UPDATE modifying PK
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
insert into t1 values(10, 'a');
delete from t1;
insert into t1 values( 5, 'b');
insert into t1 values(15, 'c');
set transaction isolation level read committed;
set debug_sync="innodb_row_update_for_mysql_begin SIGNAL checked_duplicate WAIT_FOR do_insert";
update t1 set col2='a', col1=4 where col1=5;
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
set transaction isolation level read committed;
update t1 set col2='a' where col1=15;
set debug_sync="now SIGNAL do_insert";
connection con1;
ERROR 23000: Duplicate entry 'a' for key 'col2'
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	b
15	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
## UPDATE IGNORE modifying PK
create table t1 (
col1 int primary key,
col2 varchar(3000),
unique (col2) using hash) engine=innodb;
start transaction;
select * from t1;
col1	col2
connect con1,localhost,root;
insert into t1 values(10, 'a');
delete from t1;
insert into t1 values( 5, 'b');
insert into t1 values(15, 'c');
insert into t1 values( 9, 'd');
set transaction isolation level read committed;
set debug_sync="innodb_row_update_for_mysql_begin SIGNAL checked_duplicate WAIT_FOR do_insert";
update ignore t1 set col2=chr(92+col1), col1=col1-1 where col1<=9;
connect con2,localhost,root;
set debug_sync="now WAIT_FOR checked_duplicate";
set transaction isolation level read committed;
update t1 set col2='a' where col1=15;
set debug_sync="now SIGNAL do_insert";
connection con1;
ERROR 42000: UPDATE IGNORE in READ COMMITTED isolation mode of a table with a UNIQUE constraint USING HASH is not currently supported
connection default;
select * from t1;
col1	col2
commit;
select * from t1;
col1	col2
5	b
9	d
15	a
disconnect con1;
disconnect con2;
set debug_sync='RESET';
drop table t1;
# End of 10.6 tests
