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a4faffd14a
Replace the array of mutexes that used to protect dict_index_t::stat_n_diff_key_vals[] with an array of rw locks that protects all the stats related members in dict_table_t and all of its indexes. Approved by: Jimmy (rb://503)
49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
#
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# http://bugs.mysql.com/53046
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# dict_update_statistics_low can still be run concurrently on same table
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#
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# This is a symbolic test, it would not fail if the bug is present.
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# Rather those SQL commands have been used during manual testing under
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# UNIV_DEBUG & UNIV_SYNC_DEBUG to test all changed codepaths for locking
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# correctness.
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#
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-- source include/have_innodb_plugin.inc
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CREATE TABLE bug53046_1 (c1 INT PRIMARY KEY) ENGINE=INNODB;
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CREATE TABLE bug53046_2 (c2 INT PRIMARY KEY,
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FOREIGN KEY (c2) REFERENCES bug53046_1(c1)
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ON UPDATE CASCADE ON DELETE CASCADE) ENGINE=INNODB;
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INSERT INTO bug53046_1 VALUES (1);
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let $i = 5;
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while ($i) {
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eval INSERT INTO bug53046_1 SELECT c1+(SELECT MAX(c1) FROM bug53046_1)
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FROM bug53046_1;
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dec $i;
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}
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INSERT INTO bug53046_2 VALUES (1), (2);
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# CREATE TABLE innodb_table_monitor (a int) ENGINE=INNODB;
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# wait more than 1 minute and observe the mysqld output
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# DROP TABLE innodb_table_monitor;
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ANALYZE TABLE bug53046_1;
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# this prints create time and other nondeterministic data
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-- disable_result_log
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SHOW TABLE STATUS LIKE 'bug53046_1';
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-- enable_result_log
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UPDATE bug53046_1 SET c1 = c1 - 1;
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DELETE FROM bug53046_1;
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INSERT INTO bug53046_1 VALUES (1);
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INSERT INTO bug53046_2 VALUES (1);
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TRUNCATE TABLE bug53046_2;
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DROP TABLE bug53046_2;
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DROP TABLE bug53046_1;
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