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9bc874a594
Let us introduce the parameter innodb_read_only_compressed that is ON by default, making any ROW_FORMAT=COMPRESSED tables read-only. I developed the ROW_FORMAT=COMPRESSED format based on Heikki Tuuri's rough design between 2005 and 2008. It might have been a good idea back then, but no proper benchmarks were ever run to validate the design or the implementation. The format has been more or less obsolete for years. It limits innodb_page_size to 16384 bytes (the default), and instant ALTER TABLE is not supported. This is the first step towards deprecating and removing write support for ROW_FORMAT=COMPRESSED tables.
93 lines
2 KiB
Text
93 lines
2 KiB
Text
#
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# Test information_schema.innodb_cmp_per_index
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#
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-- source include/have_innodb.inc
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# numbers read in this test depend on the page size
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-- source include/have_innodb_16k.inc
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# include/restart_mysqld.inc does not work in embedded mode
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-- source include/not_embedded.inc
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-- vertical_results
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SET @save_enabled= @@GLOBAL.innodb_cmp_per_index_enabled;
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SET GLOBAL innodb_cmp_per_index_enabled=ON;
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# reset any leftover stats from previous tests
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-- disable_query_log
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-- disable_result_log
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SELECT * FROM information_schema.innodb_cmp_per_index_reset;
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-- enable_result_log
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-- enable_query_log
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# see that the table is empty
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SELECT * FROM information_schema.innodb_cmp_per_index;
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--disable_query_log
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SET @save_innodb_read_only_compressed=@@GLOBAL.innodb_read_only_compressed;
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SET GLOBAL innodb_read_only_compressed=OFF;
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--enable_query_log
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# create a table that uses compression
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CREATE TABLE t (
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a INT,
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b VARCHAR(512),
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c VARCHAR(16),
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PRIMARY KEY (a),
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INDEX (b(512)),
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INDEX (c(16))
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) ENGINE=INNODB KEY_BLOCK_SIZE=2;
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SELECT
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database_name,
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table_name,
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index_name,
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compress_ops,
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compress_ops_ok,
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uncompress_ops
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FROM information_schema.innodb_cmp_per_index
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ORDER BY 1, 2, 3;
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# insert some data into it
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BEGIN;
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-- disable_query_log
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let $i=128;
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while ($i)
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{
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-- eval INSERT INTO t VALUES ($i, REPEAT('x', 512), NULL);
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dec $i;
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}
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-- enable_query_log
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COMMIT;
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ALTER TABLE t DROP INDEX c;
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--disable_query_log
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SET GLOBAL innodb_read_only_compressed=@save_innodb_read_only_compressed;
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--enable_query_log
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GRANT USAGE ON *.* TO 'tuser01'@'localhost' IDENTIFIED BY 'cDJvI9s_Uq';
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FLUSH PRIVILEGES;
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-- connect (con1,localhost,tuser01,cDJvI9s_Uq,)
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-- connection con1
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-- error ER_SPECIFIC_ACCESS_DENIED_ERROR
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SELECT * FROM information_schema.innodb_cmp_per_index;
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-- connection default
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-- disconnect con1
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DROP USER 'tuser01'@'localhost';
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SELECT
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database_name,
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table_name,
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index_name,
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compress_ops,
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compress_ops_ok,
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uncompress_ops
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FROM information_schema.innodb_cmp_per_index
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ORDER BY 1, 2, 3;
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DROP TABLE t;
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SET GLOBAL innodb_cmp_per_index_enabled=@save_enabled;
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