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![]() This split from MDEV-32294, discovered when inspecting how Item_subselect::used_tables_cache gets recalculated during 1st and 2nd executions of prepared statements. We build a list of outer references resolved against each select_lex. This list is not reset at the end of a prepared statement, so each element in this must be allocated on statement memory. Because of this we rely on MDEV-30073, as prior to this patch, some outer references are freed at the end of prepared statement execution. We use this list to recalculate Item_subselect::used_tables_cache There are a number of additional processing steps that need to happen during query merges. A derived table merge will leave a mix of SELECT_LEX::nest_base_level pointers in our query structure. Some Item::*processors will search for items that 'belong' only to the 'unit' being searched. We need to update this and nest_level when merging. We update SELECT_LEX::outer_references_resolved_here, in case an Item in a subquery is no longer an outer reference. We introduce a number tests in main.outer_reference, along with a way of wrapping each select to be executed in a number of different ways. TODO, check that the result of each of these different ways of execution is identical. We could wrap this into client/mysqltest and perhaps allow stacking of each execution method, such as --view (to create a view from our test statement and then select from the view) and --ps (to prepare our test statement, now selecting from a view, and compare data output from first and second executions). Name resolution fixes related to prepared statement execution. We no longer call fix_outer_field after the first execution, we now rely on the attribute depended_from, populated during the first execution. Code is added to Item_field::fix_fields to compensate. We allocate view field substituions on statement memory. When run as a prepared statement, this happens during the first execution. table_map fixes related to prepared statement and view processing. In setup_fields, during the 2nd execution of a prepared statement, we can call used_tables() prior to any caches being set up. This can result in incorrect processing. We also ban execution of EXPLAIN EXTENDED statements during mtr ps protocol runs as the generation of warnings varies due to the fact that some Item select_transformers cannot be run during execution of the prepare statement, so we would normally expect a different warning output. |
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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/