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--source include/have_innodb.inc
--source include/not_valgrind.inc
--source include/not_embedded.inc
--source include/have_sequence.inc
SET GLOBAL innodb_defragment_stats_accuracy = 20;
DELETE FROM mysql.innodb_index_stats;
--echo # Create table.
CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY AUTO_INCREMENT, 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 count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('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 like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
--echo # Delete some rows.
BEGIN;
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;
}
COMMIT;
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
optimize table t1;
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
set global innodb_defragment_stats_accuracy = 40;
INSERT INTO t1 (b) SELECT b from t1;
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
INSERT INTO t1 (b) SELECT b from t1;
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
--echo # Table rename should cause stats rename.
rename table t1 to t2;
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and stat_name in ('n_page_split');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and stat_name in ('n_pages_freed');
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and stat_name in ('n_leaf_pages_defrag');
--echo # Drop index should cause stats drop, but will not.
drop index SECOND on t2;
--sorted_result
SELECT stat_name, stat_value>0 FROM mysql.innodb_index_stats
WHERE table_name like '%t2%' AND index_name='SECOND';
--echo #
--echo # MDEV-26636: Statistics must not be written for temporary tables
--echo #
SET GLOBAL innodb_defragment_stats_accuracy = 1;
CREATE TEMPORARY TABLE t (a INT PRIMARY KEY, c CHAR(255) NOT NULL)
ENGINE=InnoDB;
INSERT INTO t SELECT seq, '' FROM seq_1_to_100;
--source include/restart_mysqld.inc
SELECT * FROM mysql.innodb_index_stats where table_name like '%t1%';
--sorted_result
SELECT table_name, index_name, stat_name, stat_value>0
FROM mysql.innodb_index_stats;
--echo # Clean up
DROP TABLE t2;
SELECT * FROM mysql.innodb_index_stats;
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