cmp_per_index.test

#
# Test information_schema.innodb_cmp_per_index
#

# numbers read in this test depend on the page size

# Using innodb_log_compressed=0 leads to a larger number of page
# compressions, because page_cur_insert_rec_zip() will reorganize the
# page before attempting an insert followed by page compression and
# page_zip_compress_write_log_no_data().
select @@global.innodb_log_compressed_pages into @save_innodb_log_compressed_pages;
SET @@global.innodb_log_compressed_pages=1;

-- vertical_results

SET GLOBAL innodb_cmp_per_index_enabled=ON;

# reset any leftover stats from previous tests
-- disable_query_log
-- disable_result_log
SELECT * FROM information_schema.innodb_cmp_per_index_reset;
-- enable_result_log
-- enable_query_log

# see that the table is empty
SELECT * FROM information_schema.innodb_cmp_per_index;

# create a table that uses compression
CREATE TABLE t (
	a INT,
	b VARCHAR(512),
	c VARCHAR(16),
	PRIMARY KEY (a),
	INDEX (b(512)),
	INDEX (c(16))
) charset latin1 ENGINE=INNODB KEY_BLOCK_SIZE=2;

SELECT
database_name,
table_name,
index_name,
compress_ops,
compress_ops_ok,
uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;

# insert some data into it
BEGIN;
-- disable_query_log
let $i=128;
while ($i)
{
	-- eval INSERT INTO t VALUES ($i, REPEAT('x', 512), NULL);
	dec $i;
}
-- enable_query_log
COMMIT;

ALTER TABLE t DROP INDEX c;

CREATE USER 'tuser01'@'localhost' IDENTIFIED BY 'cDJvI9s_Uq';
FLUSH PRIVILEGES;

-- connect (con1,localhost,tuser01,cDJvI9s_Uq,)
-- connection con1

-- error ER_SPECIFIC_ACCESS_DENIED_ERROR
SELECT * FROM information_schema.innodb_cmp_per_index;

-- connection default
-- disconnect con1

DROP USER 'tuser01'@'localhost';

SELECT
database_name,
table_name,
index_name,
CASE WHEN compress_ops=47 and @@innodb_compression_level IN (4,8,9) THEN 65
ELSE compress_ops END as compress_ops,
CASE WHEN compress_ops_ok=47 and @@innodb_compression_level IN (4,8,9) THEN 65
ELSE compress_ops_ok END as compress_ops_ok,
uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;

SET GLOBAL innodb_log_compressed_pages=@save_innodb_log_compressed_pages;

--disable_testcase BUG#28624115

# restart mysqld and see that uncompress ops also gets increased when
# selecting from the table again

-- source include/restart_mysqld.inc

SET GLOBAL innodb_cmp_per_index_enabled=ON;

#Force table to use primary key
CREATE TABLE tmp_table SELECT * FROM t;

SELECT
database_name,
table_name,
index_name,
compress_ops,
compress_ops_ok,
CASE WHEN uncompress_ops=6 and @@innodb_compression_level IN (4,8,9) THEN 9
ELSE uncompress_ops END as uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;

DROP TABLE tmp_table;

--enable_testcase

DROP TABLE t;

SET GLOBAL innodb_cmp_per_index_enabled=default;