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The problem was that ALTER TABLE on a merge table which was locked using LOCK TABLE ... WRITE, by mistake gave ER_TABLE_NOT_LOCKED_FOR_WRITE. During opening of the table to be ALTERed, open_table() tried to get an upgradable metadata lock. In LOCK TABLEs mode, this lock must already exist (i.e. taken by LOCK TABLE) as new locks of this type cannot be acquired for fear of deadlock. So in LOCK TABLEs mode, open_table() tried to find an existing upgradable lock for the table to be altered. The problem was that open_table() also tried to find upgradable metadata locks for children of merge tables even if no such locks are needed to execute ALTER TABLE on merge tables. This patch fixes the problem by making sure that open tables code only searches for upgradable metadata locks for the merge table and not for the merge children tables. The patch also fixes a related bug where an upgradable metadata lock was aquired outside of LOCK TABLEs mode even if the table in question was temporary. This bug meant that LOCK TABLES or DDL on temporary tables by mistake could be blocked/aborted by locks held on base tables with the same table name by other connections. Test cases added to merge.test and lock_multi.test. |
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collections | ||
extra | ||
include | ||
lib | ||
r | ||
std_data | ||
suite | ||
t | ||
CMakeLists.txt | ||
Makefile.am | ||
mtr.out-of-source | ||
mysql-stress-test.pl | ||
mysql-test-run.pl | ||
purify.supp | ||
README | ||
README.gcov | ||
README.stress | ||
valgrind.supp |
This directory contains a test suite for the MySQL daemon. To run the currently existing test cases, simply execute ./mysql-test-run in this directory. It will fire up the newly built mysqld and test it. Note that you do not have to have to do "make install", and you could actually have a co-existing MySQL installation. The tests will not conflict with it. All tests must pass. If one or more of them fail on your system, please read the following manual section for instructions on how to report the problem: http://dev.mysql.com/doc/mysql/en/mysql-test-suite.html If you want to use an already running MySQL server for specific tests, use the --extern option to mysql-test-run. Please note that in this mode, the test suite expects you to provide the names of the tests to run. For example, here is the command to run the "alias" and "analyze" tests with an external server: mysql-test-run --extern alias analyze To match your setup, you might also need to provide --socket, --user, and other relevant options. With no test cases named on the command line, mysql-test-run falls back to the normal "non-extern" behavior. The reason for this is that some tests cannot run with an external server. You can create your own test cases. To create a test case, create a new file in the t subdirectory using a text editor. The file should have a .test extension. For example: xemacs t/test_case_name.test In the file, put a set of SQL statements that create some tables, load test data, and run some queries to manipulate it. We would appreciate it if you name your test tables t1, t2, t3 ... (to not conflict too much with existing tables). Your test should begin by dropping the tables you are going to create and end by dropping them again. This ensures that you can run the test over and over again. If you are using mysqltest commands (like result file names) in your test case, you should create the result file as follows: mysql-test-run --record test_case_name or mysqltest --record < t/test_case_name.test If you only have a simple test cases consisting of SQL statements and comments, you can create the test case in one of the following ways: mysql-test-run --record test_case_name mysql test < t/test_case_name.test > r/test_case_name.result mysqltest --record --record-file=r/test_case_name.result < t/test_case_name.test When this is done, take a look at r/test_case_name.result - If the result is incorrect, you have found a bug. In this case, you should edit the test result to the correct results so that we can verify that the bug is corrected in future releases. To submit your test case, put your .test file and .result file(s) into a tar.gz archive, add a README that explains the problem, ftp the archive to ftp://support.mysql.com/pub/mysql/secret/ and send a mail to bugs@lists.mysql.com