mariadb

Tree: 841a74a4d6

Igor Babaev 841a74a4d6 Fixed LP bug #939009 . The result of materialization of the right part of an IN subquery predicate is placed into a temporary table. Each row of the materialized table is distinct. A unique key over all fields of the temporary table is defined and created. It allows to perform key look-ups into the table. The table created for a materialized subquery can be accessed by key as any other table. The function best_access-path search for the best access to join a table to a given partial join. With some where conditions this function considers a possibility of a ref_or_null access. If such access employs the unique key on the temporary table then when estimating the cost this access the function tries to use the array rec_per_key. Yet, such array is not built for this unique key. This causes a crash of the server. Rows returned by the subquery that contain nulls don't have to be placed into temporary table, as they cannot be match any row produced by the left part of the subquery predicate. So all fields of the temporary table can be defined as non-nullable. In this case any ref_or_null access to the temporary table does not make any sense and it does not make sense to estimate such an access. The fix makes sure that the temporary table for a materialized IN subquery is defined with columns that are all non-nullable. The also ensures that any row with nulls returned by the subquery is not placed into the temporary table.		14 years ago
..
binlog	Merge with 5.2.	14 years ago
engines	bug#11766457 - adjusting/modifying the the tests as tests were failing if system time zone is set differently.	14 years ago
federated	Merge with 5.1	14 years ago
funcs_1	Adjusted test cases of the suite funcs_1.	14 years ago
funcs_2	Changed to Oracle bug numbers	15 years ago
handler	Fixed compiler warnings	15 years ago
ibmdb2i	Bug#49329 example (and other) engines use wrong collation for open tables hash	16 years ago
im	Move instance manager tests to it's own suite	19 years ago
innodb	Merge with MariaDB 5.2	14 years ago
innodb_plugin	Automatic merge	14 years ago
jp	fixed jp test failures	17 years ago
large_tests	Bug#27029 alter table ... enable keys crashes mysqld on large table	19 years ago
manual	BUG#49978: Replication tests don't clean up replication state at the end	15 years ago
maria	Merge with MariaDB 5.2	14 years ago
ndb	Initail merge with MySQL 5.1 (XtraDB still needs to be merged)	14 years ago
ndb_team	Initail merge with MySQL 5.1 (XtraDB still needs to be merged)	14 years ago
optimizer_unfixed_bugs	merge with 5.1-micro	15 years ago
oqgraph	oqgraph and sphinx on windows	15 years ago
parts	Merge with 5.2.	14 years ago
pbxt	Fixed LP bug #939009.	14 years ago
percona	Added test case forlp:875797 Using 'innodb_sys_indexes' causes core dump	14 years ago
plugins	plugin renamed socket_peercred -> unix_socket.	14 years ago
rpl	Merge with 5.2.	14 years ago
rpl_ndb	Merge with 5.2.	14 years ago
sphinx	use mtr_verbose() for debug output in suite.pm files	15 years ago
stress	Merge trift2.:/MySQL/M51/mysql-5.1	18 years ago
sys_vars	Merge with 5.2.	14 years ago
vcol	Backport of:	14 years ago