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ce8a74f235
The main purpose of this allow one to use the --read-only option to ensure that no one can issue a query that can block replication. The --read-only option can now take 4 different values: 0 No read only (as before). 1 Blocks changes for users without the 'READ ONLY ADMIN' privilege (as before). 2 Blocks in addition LOCK TABLES and SELECT IN SHARE MODE for not 'READ ONLY ADMIN' users. 3 Blocks in addition 'READ_ONLY_ADMIN' users for all the previous statements. read_only is changed to an enum and one can use the following names for the lock levels: OFF, ON, NO_LOCK, NO_LOCK_NO_ADMIN Too keep things compatible with older versions config files, one can still use values FALSE and TRUE, which are mapped to OFF and ON. The main visible changes are: - 'show variables like "read_only"' now returns a string instead of a number. - Error messages related to read_only violations now contains the current value off readonly. Other things: - is_read_only_ctx() renamed to check_read_only_with_error() - Moved TL_READ_SKIP_LOCKED to it's logical place Reviewed by: Sergei Golubchik <serg@mariadb.org>
168 lines
6.7 KiB
Text
168 lines
6.7 KiB
Text
############## mysql-test\t\read_only_basic.test ###############
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# #
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# Variable Name: read_only #
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# Scope: GLOBAL #
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# Access Type: Dynamic #
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# Data Type: numeric #
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# Default Value: 0 #
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# Range: - #
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# #
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# #
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# Creation Date: 2008-02-07 #
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# Author: Salman #
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# #
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# Description: Test Cases of Dynamic System Variable read_only #
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# that checks the behavior of this variable in the following ways#
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# * Default Value #
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# * Valid & Invalid values #
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# * Scope & Access method #
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# * Data Integrity #
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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/load_sysvars.inc
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################################################################
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# START OF read_only TESTS #
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################################################################
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################################################################
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# Saving initial value of read_only in a temporary variable #
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################################################################
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SET @start_value = @@global.read_only;
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SELECT @start_value;
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--echo '#--------------------FN_DYNVARS_139_01------------------------#'
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################################################################
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# Display the DEFAULT value of read_only #
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################################################################
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SET @@global.read_only = 1;
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SET @@global.read_only = DEFAULT;
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SELECT @@global.read_only;
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--echo '#---------------------FN_DYNVARS_139_02-------------------------#'
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###############################################
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# Verify default value of variable #
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###############################################
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SET @@global.read_only = @start_value;
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SELECT @@global.read_only = 0;
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--echo '#--------------------FN_DYNVARS_139_03------------------------#'
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#################################################################
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# Change the value of read_only to a valid value #
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#################################################################
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SET @@global.read_only = 0;
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SELECT @@global.read_only;
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SET @@global.read_only = 1;
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SELECT @@global.read_only;
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SET @@global.read_only = TRUE;
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SELECT @@global.read_only;
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SET @@global.read_only = FALSE;
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SELECT @@global.read_only;
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SET @@global.read_only = ON;
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SELECT @@global.read_only;
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SET @@global.read_only = OFF;
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SELECT @@global.read_only;
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--echo '#--------------------FN_DYNVARS_139_04-------------------------#'
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####################################################################
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# Change the value of read_only to invalid value #
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####################################################################
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = -1;
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SELECT @@global.read_only;
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = 4294967296;
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SELECT @@global.read_only;
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = 10240022115;
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SELECT @@global.read_only;
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--Error ER_WRONG_TYPE_FOR_VAR
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SET @@global.read_only = 10000.01;
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SELECT @@global.read_only;
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = -1024;
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SELECT @@global.read_only;
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = 42949672950;
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SELECT @@global.read_only;
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--Error ER_WRONG_VALUE_FOR_VAR
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SET @@global.read_only = 'test';
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SELECT @@global.read_only;
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--echo '#-------------------FN_DYNVARS_139_05----------------------------#'
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####################################################################
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# Test if accessing session read_only gives error #
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####################################################################
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--Error ER_GLOBAL_VARIABLE
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SET @@session.read_only = 0;
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SELECT @@read_only;
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--echo '#----------------------FN_DYNVARS_139_06------------------------#'
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##############################################################################
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# Check if the value in GLOBAL & SESSION Tables matches values in variable #
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##############################################################################
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SELECT @@global.read_only = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='read_only';
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SELECT @@global.read_only = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.SESSION_VARIABLES
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WHERE VARIABLE_NAME='read_only';
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--echo '#---------------------FN_DYNVARS_139_07----------------------#'
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########################################################################################################
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# Check if accessing variable with SESSION,LOCAL and without SCOPE points to same session variable #
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########################################################################################################
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SET @@global.read_only = 1;
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SELECT @@read_only = @@global.read_only;
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--echo '#---------------------FN_DYNVARS_139_08----------------------#'
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###################################################################
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# Check if read_only can be accessed with and without @@ sign #
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###################################################################
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--Error ER_GLOBAL_VARIABLE
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SET read_only = 1;
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SELECT @@read_only;
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--Error ER_UNKNOWN_TABLE
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SELECT local.read_only;
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--Error ER_UNKNOWN_TABLE
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SELECT global.read_only;
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--Error ER_BAD_FIELD_ERROR
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SELECT read_only = @@session.read_only;
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##############################
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# Restore initial value #
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##############################
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SET @@global.read_only = @start_value;
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SELECT @@global.read_only;
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#################################################################
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# END OF read_only TESTS #
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#################################################################
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