config root man

#
# Test the persistent stats auto recalc during DDL
#

-- source include/have_innodb.inc

-- vertical_results

-- let $check_stats1 = SELECT n_rows FROM mysql.innodb_table_stats WHERE table_name = 'arddl' ORDER BY 1
-- let $check_stats2 = SELECT index_name, stat_name, stat_value FROM mysql.innodb_index_stats WHERE table_name = 'arddl' AND index_name = 'PRIMARY' ORDER BY 1, 2, 3

# Test ADD INDEX during background stats gathering

CREATE TABLE arddl (a INT, b INT, PRIMARY KEY (a)) ENGINE=INNODB;

INSERT INTO arddl VALUES (1, 10);
INSERT INTO arddl VALUES (2, 10);

ALTER TABLE arddl ADD INDEX (b);

# wait for the bg stats thread to update the stats, notice we wait on
# innodb_index_stats because innodb_table_stats gets updated first and
# it is possible that (if we wait on innodb_table_stats) the wait cond
# gets satisfied before innodb_index_stats is updated
let $wait_condition = SELECT stat_value = 2 FROM mysql.innodb_index_stats WHERE table_name = 'arddl' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx01';
-- source include/wait_condition.inc

# the second INSERT from above should have triggered an auto-recalc
-- eval $check_stats1
-- eval $check_stats2

DROP TABLE arddl;

# Test DROP INDEX during background stats gathering

CREATE TABLE arddl (a INT, b INT, PRIMARY KEY (a), KEY (b)) ENGINE=INNODB;

INSERT INTO arddl VALUES (3, 10);
INSERT INTO arddl VALUES (4, 10);

ALTER TABLE arddl DROP INDEX b;

let $wait_condition = SELECT stat_value = 2 FROM mysql.innodb_index_stats WHERE table_name = 'arddl' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx01';
-- source include/wait_condition.inc

-- eval $check_stats1
-- eval $check_stats2

DROP TABLE arddl;