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Bug#45100: Incomplete DROP USER in case of SQL_MODE = 'PAD_CHAR_TO_FULL_LENGTH'

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The SQL-mode PAD_CHAR_TO_FULL_LENGTH could prevent a DROP USER
statement from privileges associated with the user being dropped.
What ocurred was that reading from the User and Host fields of
the tables tables_priv or columns_priv would yield values padded
with spaces, causing a failure to match a specified user or host 
('user' != 'user     ');

The solution is to disregard the PAD_CHAR_TO_FULL_LENGTH mode
when iterating over and matching values in the privileges tables
for a DROP USER statement.
This commit is contained in:
Davi Arnaut
2009-06-12 18:11:19 -03:00
parent d3a9323aaa
commit 1ad8016974
3 changed files with 61 additions and 0 deletions
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21
mysql-test/r/sql_mode.result
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@ -506,3 +506,24 @@ mysqltest_32753@localhost
set session sql_mode=@OLD_SQL_MODE;
flush privileges;
drop user mysqltest_32753@localhost;
DROP TABLE IF EXISTS t1,t2;
CREATE USER 'user_PCTFL'@'localhost' identified by 'PWD';
CREATE USER 'user_no_PCTFL'@'localhost' identified by 'PWD';
CREATE TABLE t1 (f1 BIGINT);
CREATE TABLE t2 (f1 CHAR(3) NOT NULL, f2 CHAR(20));
GRANT ALL ON t1 TO 'user_PCTFL'@'localhost','user_no_PCTFL'@'localhost';
GRANT SELECT(f1) ON t2 TO 'user_PCTFL'@'localhost','user_no_PCTFL'@'localhost';
SET @OLD_SQL_MODE = @@SESSION.SQL_MODE;
SET SESSION SQL_MODE = 'PAD_CHAR_TO_FULL_LENGTH';
DROP USER 'user_PCTFL'@'localhost';
SET SESSION SQL_MODE = @OLD_SQL_MODE;
DROP USER 'user_no_PCTFL'@'localhost';
FLUSH PRIVILEGES;
SELECT * FROM mysql.db WHERE Host = 'localhost' AND User LIKE 'user_%PCTFL';
Host Db User Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Grant_priv References_priv Index_priv Alter_priv Create_tmp_table_priv Lock_tables_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Execute_priv Event_priv Trigger_priv
SELECT * FROM mysql.tables_priv WHERE Host = 'localhost' AND User LIKE 'user_%PCTFL';
Host Db User Table_name Grantor Timestamp Table_priv Column_priv
SELECT * FROM mysql.columns_priv WHERE Host = 'localhost' AND User LIKE 'user_%PCTFL';
Host Db User Table_name Column_name Timestamp Column_priv
DROP TABLE t1;
DROP TABLE t2;