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--source include/have_innodb.inc
#
# Bug#57252 disabling innobase_stats_on_metadata disables ANALYZE
# http://bugs.mysql.com/57252
#
-- disable_query_log
-- disable_result_log
SET @innodb_stats_on_metadata_orig = @@innodb_stats_on_metadata;
CREATE TABLE bug57252 (a INT, KEY akey (a)) ENGINE=INNODB STATS_PERSISTENT=0;
BEGIN;
let $i = 10;
while ($i) {
eval INSERT INTO bug57252 VALUES ($i);
dec $i;
}
COMMIT;
-- enable_result_log
SET GLOBAL innodb_stats_on_metadata=0;
# this calls ::info() without HA_STATUS_CONST and so
# index->stat_n_diff_key_vals[] is not copied to the mysql-visible
# rec_per_key
SELECT cardinality FROM information_schema.statistics
WHERE table_name='bug57252' AND index_name='akey';
# this calls ::info() with HA_STATUS_CONST and so
# index->stat_n_diff_key_vals[] is copied to the mysql-visible
# rec_per_key at the end; when the bug is present dict_update_statistics()
# is not called beforehand and so index->stat_n_diff_key_vals[] contains
# an outdated data and thus we get an outdated data in the result when the
# bug is present
ANALYZE TABLE bug57252;
SELECT cardinality FROM information_schema.statistics
WHERE table_name='bug57252' AND index_name='akey';
DROP TABLE bug57252;
SET GLOBAL innodb_stats_on_metadata = @innodb_stats_on_metadata_orig;
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