# Tests for PERFORMANCE_SCHEMA

show create table performance_schema.data_lock_waits;

# Debug
let $debug_script = 0;

#setup
let $select_column = COUNT(*);
let $table = performance_schema.data_lock_waits;

connect(con1, localhost, root,,);

--echo # Connection con1
--connection con1

create database explain_test_db;
create table explain_test_db.explain_test_table(a int, b int, PRIMARY KEY (a, b)) engine=innodb
  PARTITION BY RANGE( a )
    SUBPARTITION BY HASH( b ) (
        PARTITION p0 VALUES LESS THAN (1990) (
            SUBPARTITION s0,
            SUBPARTITION s1
        ),
        PARTITION p1 VALUES LESS THAN (2000) (
            SUBPARTITION s2,
            SUBPARTITION s3
        ),
        PARTITION p2 VALUES LESS THAN MAXVALUE (
            SUBPARTITION s4,
            SUBPARTITION s5
        )
  );

insert into explain_test_db.explain_test_table values (1, 100), (1995, 200);

start transaction;
select * from explain_test_db.explain_test_table where a <= 1990 for update;

connect(con2, localhost, root,,);

--echo # Connection con2
--connection con2

start transaction;
--send
insert into explain_test_db.explain_test_table values (2, 150), (1998, 250);

--echo # Connection default
--connection default

# Wait for con2 to block
-- connection default
let $wait_condition= SELECT COUNT(*)>=1 FROM performance_schema.data_locks
  where OBJECT_NAME='explain_test_table' and LOCK_STATUS='WAITING';
--source include/wait_condition.inc

connect(con3, localhost, root,,);

--echo # Connection con3
--connection con3

create table explain_test_db.noise_table(a int, b int, PRIMARY KEY (a, b)) engine=innodb;
insert into explain_test_db.noise_table
  values (1, 100), (2, 200), (3, 300), (5, 500);
start transaction;
select * from explain_test_db.noise_table where a >= 2 for update;

connect(con4, localhost, root,,);

--echo # Connection con4
--connection con4

start transaction;
--send
insert into explain_test_db.noise_table values (4, 400);

--connection default

# Wait for con4 to block
-- connection default
let $wait_condition= SELECT COUNT(*)>=1 FROM performance_schema.data_locks
  where OBJECT_NAME='noise_table' and LOCK_STATUS='WAITING';
--source include/wait_condition.inc
if (!$success)
{
# wait_condition failed, dumping data for debug
  select * from performance_schema.threads;
  select * from performance_schema.data_locks;
  select * from performance_schema.data_lock_waits;
}

IF ($debug_script == 1)
{
  select * from performance_schema.data_locks;
  select * from performance_schema.data_lock_waits;
}

# Make sure there are enough records for the test to be valid
select count(*) >= 2 from performance_schema.data_lock_waits;

# Find requesting data lock on hold
select ENGINE, ENGINE_LOCK_ID, ENGINE_TRANSACTION_ID, THREAD_ID, EVENT_ID
  from performance_schema.data_locks
  where OBJECT_NAME='explain_test_table' and LOCK_STATUS='WAITING'
  into @engine, @requesting_lock_id, @requesting_trx_id,
  @requesting_thread_id, @requesting_event_id;

# Find blocking data lock
# use upper(ENGINE) to prevent the optimizer from using an index
select
  BLOCKING_ENGINE_LOCK_ID,
  BLOCKING_ENGINE_TRANSACTION_ID,
  BLOCKING_THREAD_ID,
  BLOCKING_EVENT_ID
  from performance_schema.data_lock_waits
  where (upper(ENGINE) = upper(@engine))
    and (REQUESTING_ENGINE_LOCK_ID = @requesting_lock_id)
  into @blocking_lock_id, @blocking_trx_id, @blocking_thread_id, @blocking_event_id;

IF ($debug_script == 1)
{
  select @engine,
    @requesting_lock_id,
    @requesting_trx_id,
    @requesting_thread_id,
    @requesting_event_id,
    @blocking_lock_id,
    @blocking_trx_id,
    @blocking_thread_id,
    @blocking_event_id;
}

# Make sure this test found a record.
select @engine,
  @requesting_lock_id is null,
  @requesting_trx_id is null,
  @requesting_thread_id is null,
  @requesting_event_id is null,
  @blocking_lock_id is null,
  @blocking_trx_id is null,
  @blocking_thread_id is null,
  @blocking_event_id is null;

###########################################################################
# Test index on REQUESTING_ENGINE_LOCK_ID, ENGINE
###########################################################################

let $table = performance_schema.data_lock_waits;

let $column_count = 2;
let $col1 = REQUESTING_ENGINE_LOCK_ID;
let $col2 = ENGINE;
let $col1_act = @requesting_lock_id;
let $col2_act = @engine;

--source ../include/idx_explain_test.inc

# verify actual data
select BLOCKING_ENGINE_LOCK_ID = @blocking_lock_id
  from performance_schema.data_lock_waits
  where (ENGINE = @engine)
  and (REQUESTING_ENGINE_LOCK_ID = @requesting_lock_id);

###########################################################################
# Test index on BLOCKING_ENGINE_LOCK_ID, ENGINE
###########################################################################

let $table = performance_schema.data_lock_waits;

let $column_count = 2;
let $col1 = BLOCKING_ENGINE_LOCK_ID;
let $col2 = ENGINE;
let $col1_act = @blocking_lock_id;
let $col2_act = @engine;

--source ../include/idx_explain_test.inc

# verify actual data
select REQUESTING_ENGINE_LOCK_ID = @requesting_lock_id
  from performance_schema.data_lock_waits
  where (ENGINE = @engine)
  and (BLOCKING_ENGINE_LOCK_ID = @blocking_lock_id);

###########################################################################
# Test index on REQUESTING_ENGINE_TRANSACTION_ID, ENGINE
###########################################################################

let $table = performance_schema.data_lock_waits;

let $column_count = 2;
let $col1 = REQUESTING_ENGINE_TRANSACTION_ID;
let $col2 = ENGINE;
let $col1_act = @requesting_trx_id;
let $col2_act = @engine;

--source ../include/idx_explain_test.inc

# verify actual data
select BLOCKING_ENGINE_LOCK_ID = @blocking_lock_id
  from performance_schema.data_lock_waits
  where (ENGINE = @engine)
  and (REQUESTING_ENGINE_TRANSACTION_ID = @requesting_trx_id);

###########################################################################
# Test index on BLOCKING_ENGINE_TRANSACTION_ID, ENGINE
###########################################################################

let $table = performance_schema.data_lock_waits;

let $column_count = 2;
let $col1 = BLOCKING_ENGINE_TRANSACTION_ID;
let $col2 = ENGINE;
let $col1_act = @blocking_trx_id;
let $col2_act = @engine;

--source ../include/idx_explain_test.inc

# verify actual data
select REQUESTING_ENGINE_LOCK_ID = @requesting_lock_id
  from performance_schema.data_lock_waits
  where (ENGINE = @engine)
  and (BLOCKING_ENGINE_TRANSACTION_ID = @blocking_trx_id);

###########################################################################
# Test index on REQUESTING_THREAD_ID, REQUESTING_EVENT_ID
###########################################################################

let $table = performance_schema.data_lock_waits force index(REQUESTING_THREAD_ID);

let $column_count = 2;
let $col1 = REQUESTING_THREAD_ID;
let $col2 = REQUESTING_EVENT_ID;
let $col1_act = @requesting_thread_id;
let $col2_act = @requesting_event_id;

--source ../include/idx_explain_test.inc

# verify actual data
select BLOCKING_ENGINE_LOCK_ID = @blocking_lock_id
  from performance_schema.data_lock_waits
  where (REQUESTING_THREAD_ID = @requesting_thread_id)
  and (REQUESTING_EVENT_ID = @requesting_event_id);

###########################################################################
# Test index on BLOCKING_THREAD_ID, BLOCKING_EVENT_ID
###########################################################################

let $table = performance_schema.data_lock_waits force index(BLOCKING_THREAD_ID);

let $column_count = 2;
let $col1 = BLOCKING_THREAD_ID;
let $col2 = BLOCKING_EVENT_ID;
let $col1_act = @blocking_thread_id;
let $col2_act = @blocking_event_id;

--source ../include/idx_explain_test.inc

# verify actual data
select REQUESTING_ENGINE_LOCK_ID = @requesting_lock_id
  from performance_schema.data_lock_waits
  where (BLOCKING_THREAD_ID = @blocking_thread_id)
  and (BLOCKING_EVENT_ID = @blocking_event_id);

# Cleanup

--echo # Connection con1
--connection con1
commit;

--echo # Connection con2
--connection con2
--reap
commit;

--echo # Connection con3
--connection con3
commit;

--echo # Connection con4
--connection con4
--reap
commit;

--echo # Connection default
--connection default

drop table explain_test_db.explain_test_table;
drop database explain_test_db;

--disconnect con1
--disconnect con2
--disconnect con3
--disconnect con4