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this key does not stop" (version for 5.0 only). UPDATE statement which WHERE clause used key and which invoked trigger that modified field in this key worked indefinetely. This problem occured because in cases when UPDATE statement was executed in update-on-the-fly mode (in which row is updated right during evaluation of select for WHERE clause) the new version of the row became visible to select representing WHERE clause and was updated again and again. We already solve this problem for UPDATE statements which does not invoke triggers by detecting the fact that we are going to update field in key used for scanning and performing update in two steps, during the first step we gather information about the rows to be updated and then doing actual updates. We also do this for MULTI-UPDATE and in its case we even detect situation when such fields are updated in triggers (actually we simply assume that we always update fields used in key if we have before update trigger). The fix simply extends this check which is done in check_if_key_used()/ QUICK_SELECT_I::check_if_keys_used() routine/method in such way that it also detects cases when field used in key is updated in trigger. As nice side-effect we have more precise and thus more optimal perfomance-wise check for the MULTI-UPDATE. Also check_if_key_used()/QUICK_SELECT_I::check_if_keys_used() were renamed to is_key_used()/QUICK_SELECT_I::is_keys_used() in order to better reflect that boolean predicate. Note that this check is implemented in much more elegant way in 5.1
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