--source include/have_innodb.inc
--source include/have_sequence.inc
--source include/big_test.inc
--source include/not_valgrind.inc
--source include/not_embedded.inc

select @@global.innodb_stats_persistent;
set global innodb_defragment_stats_accuracy = 20;

CREATE TABLE t1(a INT PRIMARY KEY, b VARCHAR(256), KEY SECOND(a, b))
ENGINE=INNODB;
INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1_to_1024;

--echo # Not enough page splits to trigger persistent stats write yet.
select * from mysql.innodb_index_stats where table_name='t1'
and stat_name in ('n_page_split','n_pages_freed,n_leaf_pages_defrag');

INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1025_to_2048;

--echo # Persistent stats recorded.
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_page_split');
select * from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_leaf_pages_defrag');

--echo # Delete some rows.
let $num_delete = 20;
while ($num_delete)
{
    let $j = 100 * $num_delete;
    eval delete from t1 where a between $j and $j + 30;
    dec $num_delete;
}

--source include/restart_mysqld.inc
--echo # Server Restarted

--echo # Confirm persistent stats still there after restart.
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_page_split');
select * from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_leaf_pages_defrag');

optimize table t1;
select sleep(2);

select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_leaf_pages_defrag');

set global innodb_defragment_stats_accuracy = 40;

INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_2049_to_4096;

select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_leaf_pages_defrag');

INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_4097_to_8192;

select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't1' and  stat_name in ('n_leaf_pages_defrag');


--echo # Table rename should cause stats rename.
rename table t1 to t2;
select * from mysql.innodb_index_stats where table_name = 't1';

select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_leaf_pages_defrag');

--echo # Drop index should cause stats drop.
drop index SECOND on t2;

select * from mysql.innodb_index_stats where table_name = 't2' and index_name = 'SECOND';

--source include/restart_mysqld.inc
--echo Server Restarted

select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name = 't2' and  stat_name in ('n_leaf_pages_defrag');

--echo # Clean up
DROP TABLE t2;

select * from mysql.innodb_index_stats where table_name = 't2';