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Bug#36540: CREATE EVENT and ALTER EVENT statements fail with large server_id

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The problem is that creating a event could fail if the value of
the variable server_id didn't fit in the originator column of
the event system table. The cause is two-fold: it was possible
to set server_id to a value outside the documented range (from
0 to 2^32-1) and the originator column of the event table didn't
have enough room for values in this range.

The log tables (general_log and slow_log) also don't have a proper
column type to store the server_id and having a large server_id
value could prevent queries from being logged.

The solution is to ensure that all system tables that store the
server_id value have a proper column type (int unsigned) and that
the variable can't be set to a value that is not within the range.

mysql-test/r/events_bugs.result:
  Add test case result for Bug#36540
mysql-test/r/log_tables.result:
  Update column type.
mysql-test/r/system_mysql_db.result:
  Update column type.
mysql-test/r/variables.result:
  Add test case result for server_id value range.
mysql-test/suite/sys_vars/r/server_id_basic_64.result:
  Update test case results.
mysql-test/t/events_bugs.test:
  Add test case for Bug#36540
mysql-test/t/log_tables.test:
  Fix column type.
mysql-test/t/variables.test:
  Add test case for server_id value range.
scripts/mysql_system_tables.sql:
  Columns that store the server_id value must be of type INT UNSIGNED,
  fix event (originator), general_log and slow_log (server_id) tables
  in accordance.
scripts/mysql_system_tables_fix.sql:
  Columns that store the server_id value must be of type INT UNSIGNED,
  fix event (originator), general_log and slow_log (server_id) tables
  in accordance.
sql/mysqld.cc:
  Set min and max values for the server_id variable.
  Unfortunately we can't easily change server_id variable type
  from ulong to uint32 because of the sys_var classes.
This commit is contained in:
Davi Arnaut
2009-03-11 17:30:56 -03:00
parent f79cb0de91
commit 402bc523b2
11 changed files with 107 additions and 21 deletions
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16
mysql-test/t/variables.test
View File

@ -1164,5 +1164,21 @@ SET GLOBAL expire_logs_days = @old_eld;
select @@storage_engine;
--disable_metadata
#
# Bug#36540: CREATE EVENT and ALTER EVENT statements fail with large server_id
#
SET @old_server_id = @@GLOBAL.server_id;
SET GLOBAL server_id = (1 << 32) - 1;
SELECT @@GLOBAL.server_id;
SET GLOBAL server_id = (1 << 32);
SELECT @@GLOBAL.server_id;
SET GLOBAL server_id = (1 << 60);
SELECT @@GLOBAL.server_id;
SET GLOBAL server_id = 0;
SELECT @@GLOBAL.server_id;
SET GLOBAL server_id = -1;
SELECT @@GLOBAL.server_id;
SET GLOBAL server_id = @old_server_id;
--echo End of 5.1 tests