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0c79de2419
Tasks:-
Changes in wsrep_dirty_reads variable
1.) Global + Session scope (Current: session-only)
2.) Can be set using command line.
3.) Allow all commands that do not change data (besides SELECT)
4.) Allow prepared Statements that do not change data
5.) Works with wsrep_sync_wait enabled
55 lines
1.5 KiB
Plaintext
55 lines
1.5 KiB
Plaintext
#
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# wsrep_dirty_reads
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#
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# save the initial value
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SET @wsrep_dirty_reads_session_saved = @@session.wsrep_dirty_reads;
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# default
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SELECT @@global.wsrep_dirty_reads;
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@@global.wsrep_dirty_reads
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0
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SELECT @@session.wsrep_dirty_reads;
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@@session.wsrep_dirty_reads
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0
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# valid values for session
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SET @@session.wsrep_dirty_reads=OFF;
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SELECT @@session.wsrep_dirty_reads;
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@@session.wsrep_dirty_reads
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0
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SET @@session.wsrep_dirty_reads=ON;
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SELECT @@session.wsrep_dirty_reads;
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@@session.wsrep_dirty_reads
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1
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SET @@session.wsrep_dirty_reads=default;
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SELECT @@session.wsrep_dirty_reads;
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@@session.wsrep_dirty_reads
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0
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# valid values for global
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SET @@global.wsrep_dirty_reads=OFF;
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SELECT @@global.wsrep_dirty_reads;
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@@global.wsrep_dirty_reads
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0
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SET @@global.wsrep_dirty_reads=ON;
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SELECT @@global.wsrep_dirty_reads;
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@@global.wsrep_dirty_reads
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1
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SET @@global.wsrep_dirty_reads=default;
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SELECT @@global.wsrep_dirty_reads;
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@@global.wsrep_dirty_reads
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0
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# invalid values
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SET @@session.wsrep_dirty_reads=NULL;
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ERROR 42000: Variable 'wsrep_dirty_reads' can't be set to the value of 'NULL'
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SET @@session.wsrep_dirty_reads='junk';
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ERROR 42000: Variable 'wsrep_dirty_reads' can't be set to the value of 'junk'
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SET @@global.wsrep_dirty_reads=NULL;
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ERROR 42000: Variable 'wsrep_dirty_reads' can't be set to the value of 'NULL'
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SET @@global.wsrep_dirty_reads='junk';
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ERROR 42000: Variable 'wsrep_dirty_reads' can't be set to the value of 'junk'
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# restore the initial values
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SET @@session.wsrep_dirty_reads = @wsrep_dirty_reads_session_saved;
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# End of test
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