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Bug#28234 - global/session scope - documentation vs implementation
Several system variables did not behave like system variables should do. When trying to SET them or use them in SELECT, they were reported as "unknown system variable". But they appeared in SHOW VARIABLES. This has been fixed by removing the "fixed_vars" array of variables and integrating the variables into the normal system variables chain. All of these variables do now behave as read-only global-only variables. Trying to SET them tells they are read-only, trying to SELECT the session value tells they are global only. Selecting the global value works. It delivers the same value as SHOW VARIABLES.
This commit is contained in:
Ingo Struewing
@ -793,3 +793,299 @@ SET GLOBAL log_output = 0;
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--echo
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--echo # -- End of Bug#34820.
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#
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# Bug#28234 - global/session scope - documentation vs implementation
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#
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--echo
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--echo #
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SHOW VARIABLES like 'ft_max_word_len';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.ft_max_word_len;
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SELECT @@global.ft_max_word_len;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.ft_max_word_len= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.ft_max_word_len= 7;
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#
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--echo #
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SHOW VARIABLES like 'ft_min_word_len';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.ft_min_word_len;
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SELECT @@global.ft_min_word_len;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.ft_min_word_len= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.ft_min_word_len= 7;
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#
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--echo #
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SHOW VARIABLES like 'ft_query_expansion_limit';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.ft_query_expansion_limit;
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SELECT @@global.ft_query_expansion_limit;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.ft_query_expansion_limit= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.ft_query_expansion_limit= 7;
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#
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--echo #
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SHOW VARIABLES like 'ft_stopword_file';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.ft_stopword_file;
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SELECT @@global.ft_stopword_file;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.ft_stopword_file= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.ft_stopword_file= 'x';
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#
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# Additional variables fixed.
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#
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--echo #
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SHOW VARIABLES like 'back_log';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.back_log;
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SELECT @@global.back_log;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.back_log= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.back_log= 7;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'large_files_support';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.large_files_support;
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--replace_column 1 #
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SELECT @@global.large_files_support;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.large_files_support= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.large_files_support= true;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'character_sets_dir';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.character_sets_dir;
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--replace_column 1 #
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SELECT @@global.character_sets_dir;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.character_sets_dir= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.character_sets_dir= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'init_file';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.init_file;
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--replace_column 1 #
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SELECT @@global.init_file;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.init_file= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.init_file= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'language';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.language;
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--replace_column 1 #
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SELECT @@global.language;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.language= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.language= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'large_page_size';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.large_page_size;
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--replace_column 1 #
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SELECT @@global.large_page_size;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.large_page_size= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.large_page_size= 7;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'large_pages';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.large_pages;
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--replace_column 1 #
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SELECT @@global.large_pages;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.large_pages= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.large_pages= true;
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#
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--echo #
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SHOW VARIABLES like 'log_bin';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.log_bin;
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SELECT @@global.log_bin;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.log_bin= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.log_bin= true;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'log_error';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.log_error;
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--replace_column 1 #
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SELECT @@global.log_error;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.log_error= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.log_error= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'lower_case_file_system';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.lower_case_file_system;
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--replace_column 1 #
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SELECT @@global.lower_case_file_system;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.lower_case_file_system= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.lower_case_file_system= true;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'lower_case_table_names';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.lower_case_table_names;
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--replace_column 1 #
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SELECT @@global.lower_case_table_names;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.lower_case_table_names= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.lower_case_table_names= 7;
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#
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--echo #
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SHOW VARIABLES like 'myisam_recover_options';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.myisam_recover_options;
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SELECT @@global.myisam_recover_options;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.myisam_recover_options= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.myisam_recover_options= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'open_files_limit';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.open_files_limit;
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--replace_column 1 #
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SELECT @@global.open_files_limit;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.open_files_limit= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.open_files_limit= 7;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'pid_file';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.pid_file;
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--replace_column 1 #
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SELECT @@global.pid_file;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.pid_file= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.pid_file= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'plugin_dir';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.plugin_dir;
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--replace_column 1 #
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SELECT @@global.plugin_dir;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.plugin_dir= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.plugin_dir= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'port';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.port;
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--replace_column 1 #
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SELECT @@global.port;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.port= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.port= 7;
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#
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--echo #
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SHOW VARIABLES like 'protocol_version';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.protocol_version;
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SELECT @@global.protocol_version;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.protocol_version= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.protocol_version= 7;
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#
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--echo #
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SHOW VARIABLES like 'skip_external_locking';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.skip_external_locking;
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SELECT @@global.skip_external_locking;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.skip_external_locking= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.skip_external_locking= true;
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#
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--echo #
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SHOW VARIABLES like 'skip_networking';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.skip_networking;
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SELECT @@global.skip_networking;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.skip_networking= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.skip_networking= true;
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#
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--echo #
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SHOW VARIABLES like 'skip_show_database';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.skip_show_database;
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SELECT @@global.skip_show_database;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.skip_show_database= true;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.skip_show_database= true;
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'socket';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.socket;
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--replace_column 1 #
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SELECT @@global.socket;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.socket= 'x';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.socket= 'x';
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#
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--echo #
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--replace_column 2 #
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SHOW VARIABLES like 'thread_stack';
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT @@session.thread_stack;
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--replace_column 1 #
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SELECT @@global.thread_stack;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@session.thread_stack= 7;
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@global.thread_stack= 7;
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#
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