# Test for bug #14676111: WRONG PAGE_LEVEL WRITTEN FOR UPPER THAN FATHER PAGE AT BTR_LIFT_PAGE_UP()

-- source include/have_innodb.inc
-- source include/have_debug.inc

if (`select count(*)=0 from information_schema.global_variables where variable_name = 'INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG'`)
{
  --skip Test requires InnoDB built with UNIV_DEBUG definition.
}

--disable_query_log
set @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
--enable_query_log
--disable_warnings
drop table if exists t1;
--enable_warnings

CREATE TABLE t1 (a int not null primary key) engine=InnoDB;

let $wait_condition=
  SELECT VARIABLE_VALUE < 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS
  WHERE VARIABLE_NAME = 'INNODB_PURGE_TRX_ID_AGE';

#
# make 4 leveled straight tree
#
set global innodb_limit_optimistic_insert_debug = 2;
insert into t1 values (1);
insert into t1 values (5);
#current tree form
# (1, 5)

insert into t1 values (4);
#records in a page is limited to 2 artificially. root rise occurs
#current tree form
#   (1, 5)
#(1, 4) (5)

insert into t1 values (3);
#current tree form
#    (1, 5)
#  (1, 4) (5)
#(1, 3) (4) (5)

insert into t1 values (2);
#current tree form
#      (1, 5)
#    (1, 4) (5)
#  (1, 3) (4) (5)
#(1, 2) (3) (4) (5)

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

delete from t1 where a=4;
--source include/wait_condition.inc
#deleting 1 record of 2 records don't cause merge artificially.
#current tree form
#      (1, 5)
#    (1)    (5)
#  (1, 3)     (5)
#(1, 2) (3)     (5)

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

delete from t1 where a=5;
--source include/wait_condition.inc
#deleting 1 record of 2 records don't cause merge artificially.
#current tree form
#      (1)
#    (1)
#  (1, 3) <- lift up this level next, when deleting node ptr
#(1, 2) (3) <- merged next

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

#
# cause merge at level 0
#

#disable the artificial limitation of records in a page
set global innodb_limit_optimistic_insert_debug = 10000;
delete from t1 where a=2;
--source include/wait_condition.inc
#merge page occurs. and lift up occurs.
#current tree form
#      (1)
#    (1)
#  (1, 3)

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

insert into t1 values (2);
#current tree form
#      (1)
#    (1) <- lift up this level next, because it is not root
#  (1, 2, 3)

delete from t1 where a=2;
--source include/wait_condition.inc
#current tree form
#      (1)
#    (1, 3)

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

insert into t1 values (2);
#current tree form
#      (1)
#    (1, 2, 3) <- lift up this level next, because the father is root

delete from t1 where a=2;
--source include/wait_condition.inc
#current tree form
#      (1, 3)

analyze table t1;
select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';

drop table t1;

--disable_query_log
set global innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;
--enable_query_log
