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d20a96f9c1
In MariaDB, we have a confusing problem where: * The transaction_isolation option can be set in a configuration file, but it cannot be set dynamically. * The tx_isolation system variable can be set dynamically, but it cannot be set in a configuration file. Therefore, we have two different names for the same thing in different contexts. This is needlessly confusing, and it complicates the documentation. The same thing applys for transaction_read_only. MySQL 5.7 solved this problem by making them into system variables. https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-20.html This commit takes a similar approach by adding new system variables and marking the original ones as deprecated. This commit also resolves some legacy problems related to SET STATEMENT and transaction_isolation.
182 lines
8.2 KiB
Plaintext
182 lines
8.2 KiB
Plaintext
####################################################################
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# START OF transaction_read_only TESTS #
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####################################################################
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#############################################################
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# Save initial value #
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#############################################################
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SET @start_global_value = @@global.transaction_read_only;
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SELECT @start_global_value;
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@start_global_value
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0
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SET @start_session_value = @@session.transaction_read_only;
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SELECT @start_session_value;
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@start_session_value
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0
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########################################################################
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# Display the DEFAULT value of transaction_read_only #
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########################################################################
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SET @@global.transaction_read_only = ON;
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SET @@global.transaction_read_only = DEFAULT;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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0
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SET @@session.transaction_read_only = ON;
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SET @@session.transaction_read_only = DEFAULT;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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###############################################################################
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# Change the value of transaction_read_only to a valid value for GLOBAL Scope #
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###############################################################################
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SET @@global.transaction_read_only = ON;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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1
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SET @@global.transaction_read_only = OFF;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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0
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SET @@global.transaction_read_only = 0;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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0
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SET @@global.transaction_read_only = 1;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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1
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SET @@global.transaction_read_only = TRUE;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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1
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SET @@global.transaction_read_only = FALSE;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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0
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################################################################################
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# Change the value of transaction_read_only to a valid value for SESSION Scope #
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################################################################################
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SET @@session.transaction_read_only = ON;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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1
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SET @@session.transaction_read_only = OFF;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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SET @@session.transaction_read_only = 0;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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SET @@session.transaction_read_only = 1;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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1
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SET @@session.transaction_read_only = TRUE;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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1
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SET @@session.transaction_read_only = FALSE;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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#################################################################
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# Change the value of transaction_read_only to an invalid value #
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#################################################################
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SET @@global.transaction_read_only = 'ONN';
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'ONN'
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SET @@global.transaction_read_only = "OFFF";
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'OFFF'
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SET @@global.transaction_read_only = TTRUE;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'TTRUE'
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SET @@global.transaction_read_only = FELSE;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'FELSE'
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SET @@global.transaction_read_only = -1024;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of '-1024'
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SET @@global.transaction_read_only = 65536;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of '65536'
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SET @@global.transaction_read_only = 65530.34;
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ERROR 42000: Incorrect argument type to variable 'transaction_read_only'
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SET @@global.transaction_read_only = test;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'test'
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SET @@session.transaction_read_only = ONN;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'ONN'
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SET @@session.transaction_read_only = ONF;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'ONF'
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SET @@session.transaction_read_only = OF;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'OF'
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SET @@session.transaction_read_only = 'OFN';
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'OFN'
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SET @@session.transaction_read_only = -2;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of '-2'
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SET @@session.transaction_read_only = 65530.34;
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ERROR 42000: Incorrect argument type to variable 'transaction_read_only'
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SET @@session.transaction_read_only = 65550;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of '65550'
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SET @@session.transaction_read_only = test;
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ERROR 42000: Variable 'transaction_read_only' can't be set to the value of 'test'
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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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 IF(@@global.transaction_read_only, "ON", "OFF") = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='transaction_read_only';
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IF(@@global.transaction_read_only, "ON", "OFF") = VARIABLE_VALUE
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1
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####################################################################
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# Check if the value in SESSION Table matches value in variable #
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####################################################################
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SELECT IF(@@session.transaction_read_only, "ON", "OFF") = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.SESSION_VARIABLES
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WHERE VARIABLE_NAME='transaction_read_only';
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IF(@@session.transaction_read_only, "ON", "OFF") = VARIABLE_VALUE
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1
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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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SET @@transaction_read_only = OFF;
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SET @@global.transaction_read_only = ON;
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SELECT @@transaction_read_only = @@global.transaction_read_only;
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@@transaction_read_only = @@global.transaction_read_only
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0
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##############################################################################
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# Check if accessing variable with SESSION,LOCAL and without SCOPE points #
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# to same session variable #
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##############################################################################
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SET @@transaction_read_only = ON;
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SELECT @@transaction_read_only = @@local.transaction_read_only;
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@@transaction_read_only = @@local.transaction_read_only
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1
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SELECT @@local.transaction_read_only = @@session.transaction_read_only;
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@@local.transaction_read_only = @@session.transaction_read_only
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1
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###############################################################################
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# Check if transaction_read_only can be accessed with and without @@ sign #
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###############################################################################
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# @@session is synonym for SESSION
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SET @@session.transaction_read_only= 0;
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# Without modifier, SET changes session variable
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SET transaction_read_only = 1;
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SELECT @@transaction_read_only;
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@@transaction_read_only
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1
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# name1.name2 refers to database_name.table_name
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SELECT session.transaction_read_only;
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ERROR 42S02: Unknown table 'session' in field list
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####################################
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# Restore initial value #
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####################################
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SET @@global.transaction_read_only = @start_global_value;
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SELECT @@global.transaction_read_only;
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@@global.transaction_read_only
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0
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SET @@session.transaction_read_only = @start_session_value;
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SELECT @@session.transaction_read_only;
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@@session.transaction_read_only
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0
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#########################################################
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# END OF transaction_read_only TESTS #
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#########################################################
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