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77c0f33ee2
"set optimizer_switch to e or d causes invalid memory writes/valgrind warnings": due to prefix support, the argument "e" was overwritten with its full value "engine_condition_pushdown", which caused a buffer overrun. This was wrong usage of find_type(); other wrong usages are fixed here too. Please start reading with the comment of typelib.c.
74 lines
4.4 KiB
Plaintext
74 lines
4.4 KiB
Plaintext
SET @start_global_value = @@global.optimizer_switch;
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SELECT @start_global_value;
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@start_global_value
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index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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select @@global.optimizer_switch;
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@@global.optimizer_switch
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index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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select @@session.optimizer_switch;
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@@session.optimizer_switch
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index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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show global variables like 'optimizer_switch';
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Variable_name Value
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optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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show session variables like 'optimizer_switch';
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Variable_name Value
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optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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select * from information_schema.global_variables where variable_name='optimizer_switch';
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VARIABLE_NAME VARIABLE_VALUE
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OPTIMIZER_SWITCH index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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select * from information_schema.session_variables where variable_name='optimizer_switch';
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VARIABLE_NAME VARIABLE_VALUE
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OPTIMIZER_SWITCH index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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set global optimizer_switch=10;
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set session optimizer_switch=5;
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select @@global.optimizer_switch;
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@@global.optimizer_switch
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index_merge=off,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,engine_condition_pushdown=off
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select @@session.optimizer_switch;
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@@session.optimizer_switch
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index_merge=on,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,engine_condition_pushdown=off
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set global optimizer_switch="index_merge_sort_union=on";
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set session optimizer_switch="index_merge=off";
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select @@global.optimizer_switch;
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@@global.optimizer_switch
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index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off
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select @@session.optimizer_switch;
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@@session.optimizer_switch
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index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,engine_condition_pushdown=off
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show global variables like 'optimizer_switch';
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Variable_name Value
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optimizer_switch index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off
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show session variables like 'optimizer_switch';
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Variable_name Value
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optimizer_switch index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,engine_condition_pushdown=off
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select * from information_schema.global_variables where variable_name='optimizer_switch';
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VARIABLE_NAME VARIABLE_VALUE
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OPTIMIZER_SWITCH index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off
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select * from information_schema.session_variables where variable_name='optimizer_switch';
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VARIABLE_NAME VARIABLE_VALUE
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OPTIMIZER_SWITCH index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=off,engine_condition_pushdown=off
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set session optimizer_switch="default";
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select @@session.optimizer_switch;
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@@session.optimizer_switch
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index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off
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set global optimizer_switch=1.1;
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ERROR 42000: Incorrect argument type to variable 'optimizer_switch'
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set global optimizer_switch=1e1;
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ERROR 42000: Incorrect argument type to variable 'optimizer_switch'
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set session optimizer_switch="index_merge";
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ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge'
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set session optimizer_switch="foobar";
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ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'foobar'
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#
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# Bug#59894 set optimizer_switch to e or d causes invalid
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# memory writes/valgrind warnings
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set global optimizer_switch = 'd';
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set global optimizer_switch = 'e';
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ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'e'
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SET @@global.optimizer_switch = @start_global_value;
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SELECT @@global.optimizer_switch;
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@@global.optimizer_switch
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index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on
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