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# 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

--disable_warnings
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.
}
--enable_warnings

--disable_query_log
set @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
set @old_innodb_stats_persistent = @@innodb_stats_persistent;
set @old_innodb_rollback_segments = @@innodb_rollback_segments;
# Limit undo segments for stable progress of purge.
set global innodb_rollback_segments = 1;
--enable_query_log
--disable_warnings
drop table if exists t1;
--enable_warnings
set global innodb_stats_persistent = false;

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

#
# 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 CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';

delete from t1 where a=4;
set global innodb_purge_stop_now=ON;
set global innodb_purge_run_now=ON;
--source include/wait_innodb_all_purged.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 CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';

delete from t1 where a=5;
set global innodb_purge_stop_now=ON;
set global innodb_purge_run_now=ON;
--source include/wait_innodb_all_purged.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 CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';

#
# cause merge at level 0
#

#disable the artificial limitation of records in a page
set global innodb_limit_optimistic_insert_debug = 0;
delete from t1 where a=2;
set global innodb_purge_stop_now=ON;
set global innodb_purge_run_now=ON;
--source include/wait_innodb_all_purged.inc
#merge page occurs. and lift up occurs.
#current tree form
#      (1)
#    (1)
#  (1, 3)

analyze table t1;
select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/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;
set global innodb_purge_stop_now=ON;
set global innodb_purge_run_now=ON;
--source include/wait_innodb_all_purged.inc
#current tree form
#      (1)
#    (1, 3)

analyze table t1;
select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/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;
set global innodb_purge_stop_now=ON;
set global innodb_purge_run_now=ON;
--source include/wait_innodb_all_purged.inc
#current tree form
#      (1, 3)

analyze table t1;
select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';

drop table t1;

--disable_query_log
set global innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;
set global innodb_stats_persistent = @old_innodb_stats_persistent;
set global innodb_rollback_segments = @old_innodb_rollback_segments;
--enable_query_log