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MDEV-32906: The SQL error plugin prints (null) as database if the mariadb

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client is not using any database to execute the SQL.

Analysis:
When there is no database, the database string is NULL so (null) gets
printed.
Fix:
Print NULL instead of (null) because when there is no database SELECT
DATABASE() return NULL. SO NULL is more appropriate choice.
This commit is contained in:
Rucha Deodhar
2024-01-09 15:19:29 +05:30
parent 90cd712b84
commit ee7cc0a466
6 changed files with 104 additions and 34 deletions
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12
mysql-test/suite/plugins/r/mdev_27087.result
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@@ -1,12 +0,0 @@
show variables like 'sql_error_log%';
Variable_name Value
sql_error_log_filename sql_errors.log
sql_error_log_rate 1
sql_error_log_rotate OFF
sql_error_log_rotations 9
sql_error_log_size_limit 1000000
sql_error_log_with_db_and_thread_info ON
set global sql_error_log_rate=1;
select * from t_doesnt_exist;
ERROR 42S02: Table 'test.t_doesnt_exist' doesn't exist
THREAD_ID DATABASE_NAME TIME HOSTNAME ERROR 1146: Table 'test.t_doesnt_exist' doesn't exist : select * from t_doesnt_exist

37
mysql-test/suite/plugins/r/sql_error_log_withdbinfo.result Normal file
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show variables like 'sql_error_log%';
Variable_name Value
sql_error_log_filename sql_errors.log
sql_error_log_rate 1
sql_error_log_rotate OFF
sql_error_log_rotations 9
sql_error_log_size_limit 1000000
sql_error_log_with_db_and_thread_info ON
set global sql_error_log_rate=1;
# Trying to set the variable at runtime
SET sql_error_log_with_db_and_thread_info=OFF;
ERROR HY000: Variable 'sql_error_log_with_db_and_thread_info' is a read only variable
#
# Using test database from mtr
#
DROP DATABASE db;
ERROR HY000: Can't drop database 'db'; database doesn't exist
#
# Using no database at all
#
DROP DATABASE test;
DROP DATABASE db;
ERROR HY000: Can't drop database 'db'; database doesn't exist
#
# Using database with name `NULL`
#
CREATE DATABASE `NULL`;
USE `NULL`;
DROP DATABASE db;
ERROR HY000: Can't drop database 'db'; database doesn't exist
THREAD_ID `test` TIME HOSTNAME ERROR 1238: Variable 'sql_error_log_with_db_and_thread_info' is a read only variable : SET sql_error_log_with_db_and_thread_info=OFF
THREAD_ID `test` TIME HOSTNAME ERROR 1008: Can't drop database 'db'; database doesn't exist : DROP DATABASE db
THREAD_ID NULL TIME HOSTNAME ERROR 1008: Can't drop database 'db'; database doesn't exist : DROP DATABASE db
THREAD_ID `NULL` TIME HOSTNAME ERROR 1008: Can't drop database 'db'; database doesn't exist : DROP DATABASE db
DROP DATABASE `NULL`;
# Reset
CREATE DATABASE test;