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assertion .\filesort.cc, line 797 A query with the "ORDER BY @@some_system_variable" clause, where @@some_system_variable is NULL, causes assertion failure in the filesort procedures. The reason of the failure is in the value of Item_func_get_system_var::maybe_null: it was unconditionally set to false even if the value of a variable was NULL. mysql-test/r/variables.result: Added test case for bug #42778. mysql-test/suite/sys_vars/r/innodb_data_home_dir_basic.result: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/r/innodb_flush_method_basic.result: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/r/rpl_init_slave_func.result: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/r/ssl_capath_basic.result: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/r/ssl_cipher_basic.result: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/t/innodb_data_home_dir_basic.test: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/t/innodb_flush_method_basic.test: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/t/ssl_capath_basic.test: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/suite/sys_vars/t/ssl_cipher_basic.test: Updated test case for bug #42778: system variables were NOT NULL, now they are nullable. mysql-test/t/variables.test: Added test case for bug #42778. sql/item.cc: Bug #42778: delete order by null global variable causes assertion .\filesort.cc, line 797 The longlong_from_string_with_check function has been modified to skip unwanted warnings: now it uses the THD::no_errors flag to suppress warnings. The Item_func_get_system_var::update_null_value method sets the no_error flag. sql/item_func.cc: Bug #42778: delete order by null global variable causes assertion .\filesort.cc, line 797 1. The Item_func_get_system_var::fix_length_and_dec method has been modified to make system variables truly nullable. 2. The Item_func_get_system_var::update_null_value method method has been overloaded with a simple wrapper (like Item_field::update_null_value) to suppress unwanted warnings from Item_func_get_system_var::val_int() calls on non-numeric variable values: the Item_func_get_system_var::update_null_value method sets and restores THD::no_errors flag for a nested call of the longlong_from_string_with_check function. sql/item_func.h: Bug #42778: delete order by null global variable causes assertion .\filesort.cc, line 797 The Item_func_get_system_var::update_null_value method method has been overloaded.
103 lines
4.3 KiB
Plaintext
103 lines
4.3 KiB
Plaintext
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################## mysql-test\t\innodb_flush_method_basic.test ################
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# #
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# Variable Name: innodb_flush_method #
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# Scope: Global #
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# Access Type: Static #
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# Data Type: enumeration #
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# #
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# #
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# Creation Date: 2008-02-07 #
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# Author : Sharique Abdullah #
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# #
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# #
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# Description:Test Cases of Dynamic System Variable innodb_flush_method #
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# that checks the behavior of this variable in the following ways #
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# * Value Check #
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# * Scope Check #
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# #
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# Reference: http://dev.mysql.com/doc/refman/5.1/en/ #
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# server-system-variables.html #
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# #
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###############################################################################
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--source include/have_innodb.inc
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--echo '#---------------------BS_STVARS_029_01----------------------#'
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####################################################################
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# Displaying default value #
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####################################################################
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SELECT COUNT(@@GLOBAL.innodb_flush_method);
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--echo 0 Expected
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--echo '#---------------------BS_STVARS_029_02----------------------#'
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####################################################################
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# Check if Value can set #
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####################################################################
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--error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SET @@GLOBAL.innodb_flush_method=1;
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--echo Expected error 'Read only variable'
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SELECT COUNT(@@GLOBAL.innodb_flush_method);
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--echo 0 Expected
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--echo '#---------------------BS_STVARS_029_03----------------------#'
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#################################################################
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# Check if the value in GLOBAL Table matches value in variable #
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#################################################################
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SELECT @@GLOBAL.innodb_flush_method = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='innodb_flush_method';
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--echo 1 Expected
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SELECT COUNT(@@GLOBAL.innodb_flush_method);
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--echo 0 Expected
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SELECT COUNT(VARIABLE_VALUE)
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='innodb_flush_method';
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--echo 1 Expected
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--echo '#---------------------BS_STVARS_029_04----------------------#'
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################################################################################
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# Check if accessing variable with and without GLOBAL point to same variable #
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################################################################################
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SELECT @@innodb_flush_method = @@GLOBAL.innodb_flush_method;
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--echo 1 Expected
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--echo '#---------------------BS_STVARS_029_05----------------------#'
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################################################################################
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# Check if innodb_flush_method can be accessed with and without @@ sign #
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################################################################################
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SELECT COUNT(@@innodb_flush_method);
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--echo 0 Expected
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--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT COUNT(@@local.innodb_flush_method);
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--echo Expected error 'Variable is a GLOBAL variable'
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--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
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SELECT COUNT(@@SESSION.innodb_flush_method);
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--echo Expected error 'Variable is a GLOBAL variable'
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SELECT COUNT(@@GLOBAL.innodb_flush_method);
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--echo 0 Expected
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--Error ER_BAD_FIELD_ERROR
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SELECT innodb_flush_method = @@SESSION.innodb_flush_method;
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--echo Expected error 'Readonly variable'
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