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Oracle mode has no priority between set-operators but the current implementation with disable_index_if_needed() can not work with arbitrary mix of distinct/non-distinct set-operators as the algorithm is tied to the properly wrapped version of expression. Index can be disabled only once and cannot be reenabled afterwards. To adapt Oracle mode for the aforementioned implementation we prioritize each set operator with parens in the order of appearance. So the expression: S1 op1 S2 op2 S3 op3 S4 will be rewritten like this: (((S1 op1 S2) op2 S3) op3 S4). The rewritten expression is valid for both Oracle and default mode and renders the same result. Prioritizing is done with create_priority_nest() but it was tweaked to work with derived to be the first operand. Originally create_priority_nest() could wrap only second operand, like this: S1 op1 S2 op2 S3 -> S1 op1 (S2 op2 S3). Now this behaviour is kept by non-NULL attach_to argument. With NULL attach_to argument it produces this transformation: S1 op1 S2 -> (S1 op1 S2), but to be strict it will look like this: SELECT .. FROM (S1 op1 S2). This expression is treated as the first one in the select list, so nothing to "attach to". On importance of not making fake_select_lex after create_priority_nest() in parsed_select_expr_start(). This will fail nastily in Protocol::valid_handler() check in store_longlong() for EXPLAIN. This happens because select_options are inherited from newly made fake_select_lex but without SELECT_DESCRIBE flag which is meant to be assigned by mysql_explain_union() but union_needs_tmp_table() is false (because now top-level unit has no set-operator, it is just select from derived), so SELECT_DESCRIBE assignment is skipped. Depending on that flag send_result_set_metadata() is conditionally executed in JOIN::exec_inner(). And originally it is done via select_describe() branch for top-level select when there is no set operator (it is select from derived as explained above), not via direct send_result_set_metadata(). On IS_OR_WAS_ORACLE. Sql_mode_save_for_frm_handling removes MODE_ORACLE when view is registered or opened. We cannot return it back as this conflicts with MDEV-12478 (tested by compat/oracle.func_concat). So we are temporarily adding WAS_ORACLE flag instead. WAS_MODE_ORACLE is for testing both WAS_ORACLE and MODE_ORACLE simultaneously. |
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| .. | ||
| collections | ||
| include | ||
| lib | ||
| main | ||
| std_data | ||
| suite | ||
| asan.supp | ||
| CMakeLists.txt | ||
| dgcov.pl | ||
| lsan.supp | ||
| mariadb-stress-test.pl | ||
| mariadb-test-run.pl | ||
| mtr.out-of-source | ||
| purify.supp | ||
| README | ||
| README-gcov | ||
| README.stress | ||
| suite.pm | ||
| valgrind.supp | ||
This directory contains test suites for the MariaDB server. To run currently existing test cases, execute ./mysql-test-run in this directory. Some tests are known to fail on some platforms or be otherwise unreliable. In the file collections/smoke_test there is a list of tests that are expected to be stable. In general you do not have to have to do "make install", and you can have a co-existing MariaDB installation, the tests will not conflict with it. To run the tests in a source directory, you must do "make" first. In Red Hat distributions, you should run the script as user "mysql". The user is created with nologin shell, so the best bet is something like # su - # cd /usr/share/mysql-test # su -s /bin/bash mysql -c ./mysql-test-run This will use the installed MariaDB executables, but will run a private copy of the server process (using data files within /usr/share/mysql-test), so you need not start the mysqld service beforehand. You can omit --skip-test-list option if you want to check whether the listed failures occur for you. To clean up afterwards, remove the created "var" subdirectory, e.g. # su -s /bin/bash - mysql -c "rm -rf /usr/share/mysql-test/var" If tests fail on your system, please read the following manual section for instructions on how to report the problem: https://mariadb.com/kb/en/reporting-bugs 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, you are expected to provide 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 socket=/tmp/mysql.sock alias analyze To match your setup, you might need to provide other relevant options. With no test names on the command line, mysql-test-run will attempt to execute the default set of tests, which will certainly fail, because many tests cannot run with an external server (they need to control the options with which the server is started, restart the server during execution, etc.) You can create your own test cases. To create a test case, create a new file in the main 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. 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 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 case consisting of SQL statements and comments, you can create the result file 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 --database test --result-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. If you want to submit your test case you can send it to developers@lists.mariadb.org or attach it to a bug report on http://mariadb.org/jira/. If the test case is really big or if it contains 'not public' data, then 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://ftp.mariadb.org/private and submit a report to https://mariadb.org/jira about it. The latest information about mysql-test-run can be found at: https://mariadb.com/kb/en/mariadb/mysqltest/ If you want to create .rdiff files, check https://mariadb.com/kb/en/mariadb/mysql-test-auxiliary-files/