mariadb/mysql-test/suite/innodb/t/innodb_stats_sample_pages.test
Marko Mäkelä 228b7e4db5 MDEV-13626 Merge InnoDB test cases from MySQL 5.7
This imports and adapts a number of MySQL 5.7 test cases that are
applicable to MariaDB.

Some tests for old bug fixes are not that relevant because the code
has been refactored since then (especially starting with
MariaDB Server 10.6), and the tests would not reproduce the
original bug if the fix was reverted.

In the test innodb_fts.opt, there are many duplicate MATCH ranks, which
would make the results nondeterministic. The test was stabilized by
changing some LIMIT clauses or by adding sorted_result in those cases
where the purpose of a test was to show that no sorting took place
in the server.

In the test innodb_fts.phrase, MySQL 5.7 would generate FTS_DOC_ID that
are 1 larger than in MariaDB. In innodb_fts.index_table the difference is 2.
This is because in MariaDB, fts_get_next_doc_id() post-increments
cache->next_doc_id, while MySQL 5.7 pre-increments it.

Reviewed by: Thirunarayanan Balathandayuthapani
2023-11-08 12:17:14 +02:00

53 lines
1.7 KiB
Text

#
# Test that the table option STATS_SAMPLE_PAGES=N|default is indeed
# used by InnoDB
#
-- source include/have_innodb.inc
# Page numbers printed by this test depend on the page size
-- source include/have_innodb_16k.inc
SET GLOBAL innodb_stats_persistent_sample_pages=17;
CREATE TABLE test_ps_sample_pages_used (
a VARCHAR(512), PRIMARY KEY (a)
) ENGINE=INNODB STATS_SAMPLE_PAGES=default;
# Insert enough records into the table so that it has more than 2*17+1 pages
# If we ask to scan more than the half of the leaf pages, then the sampling
# will do full scan and we cannot check whether the sample_pages variable was
# honored.
BEGIN;
-- disable_query_log
let $i=999;
while ($i) {
eval INSERT INTO test_ps_sample_pages_used VALUES (REPEAT(1000+$i, 128));
dec $i;
}
-- enable_query_log
COMMIT;
ANALYZE TABLE test_ps_sample_pages_used;
# confirm the big number of leaf pages in the index
SELECT stat_name, stat_value FROM mysql.innodb_index_stats
WHERE table_name='test_ps_sample_pages_used' AND stat_name='n_leaf_pages';
# confirm that 17 pages were sampled, that is - the global
# innodb_stats_persistent_sample_pages is used when the table option
# STATS_SAMPLE_PAGES is set to 'default'.
SELECT sample_size FROM mysql.innodb_index_stats
WHERE table_name='test_ps_sample_pages_used' AND stat_name='n_diff_pfx01';
ALTER TABLE test_ps_sample_pages_used STATS_SAMPLE_PAGES=14;
ANALYZE TABLE test_ps_sample_pages_used;
# confirm that 14 pages were sampled, that is - the table option
# STATS_SAMPLE_PAGES is used when it is set.
SELECT sample_size FROM mysql.innodb_index_stats
WHERE table_name='test_ps_sample_pages_used' AND stat_name='n_diff_pfx01';
DROP TABLE test_ps_sample_pages_used;
SET GLOBAL innodb_stats_persistent_sample_pages=default;