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With session tracking on the tx_isolation of importance to connector frameworks, its important that tracking of tx_isolation does get informed if a user `set session transaction_isolation=X` as the alias for tx_isolation. Rather than just implement this for one variable alias, it is implemented for all aliases. To assist with this the key hash of session_tracker is now made up of the offset, not the sys_var pointer. The impacts of aliases are: - If track one variable, its alias changes, you get a tracking change on the variable you are monitoring. - If you track two aliased variables of each other, changing a variable will have a tracking events for only one of them. Aliases of Sys_var_bit are not implemented, because we don't have them, so would've been no way to verify that the new code works. Post-Review edits by Sergei Golubchik <serg@mariadb.com>
181 lines
5.8 KiB
Text
181 lines
5.8 KiB
Text
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--source include/no_protocol.inc
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--source include/not_embedded.inc
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set @save_session_track_system_variables=@@session_track_system_variables;
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SELECT @@session.character_set_connection;
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SET @@session.session_track_system_variables='character_set_connection';
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--echo # tracking info on
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--enable_session_track_info
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SET NAMES 'utf8';
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SET NAMES 'big5';
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--disable_session_track_info
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--echo # tracking info on once
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--enable_session_track_info ONCE
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SET NAMES 'utf8';
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SET NAMES 'big5';
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--echo # tracking info on
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--enable_session_track_info
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SET NAMES 'utf8';
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--echo # tracking info off once
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--disable_session_track_info ONCE
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SET NAMES 'big5';
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--disable_session_track_info
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SET @@session.session_track_system_variables= @save_session_track_system_variables;
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--echo #
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--echo # MDEV-22504: session tracking return incorrectly long traking data
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--echo #
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set @save_optimizer_switch=@@optimizer_switch;
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SET @@session.session_track_system_variables='optimizer_switch';
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--enable_session_track_info
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set optimizer_switch='index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_merge_sort_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=off,derived_merge=off,derived_with_keys=off,firstmatch=off,loosescan=off,materialization=on,in_to_exists=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=off,mrr=on,mrr_cost_based=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=off,join_cache_hashed=off,join_cache_bka=off,optimize_join_buffer_size=on,table_elimination=off,extended_keys=off,exists_to_in=off,orderby_uses_equalities=off,condition_pushdown_for_derived=off';
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--disable_session_track_info
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set @@optimizer_switch=@save_optimizer_switch;
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SET @@session.session_track_system_variables= @save_session_track_system_variables;
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--echo # End of 10.2 tests
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--echo #
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--echo # MDEV-22134 handle_fatal_signal (sig=11) in __strlen_avx2 on START
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--echo # SLAVE | Assertion
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--echo # `global_system_variables.session_track_system_variables' failed in
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--echo # Session_sysvars_tracker::init | *** buffer overflow detected ***
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--echo # (on optimized builds)
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--echo #
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--error ER_WRONG_VALUE_FOR_VAR
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SET @@GLOBAL.session_track_system_variables=NULL;
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--error ER_WRONG_VALUE_FOR_VAR
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SET SESSION session_track_system_variables=NULL;
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--echo # End of 10.3 tests
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--echo #
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--echo # MDEV-25237: crash after setting global session_track_system_variables
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--echo # to an invalid value
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--echo #
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--error ER_UNKNOWN_SYSTEM_VARIABLE
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SET GLOBAL session_track_system_variables='a';
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SET GLOBAL event_scheduler=1;
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--echo # check that value really returns as it was
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set GLOBAL session_track_system_variables='character_set_connection';
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--error ER_UNKNOWN_SYSTEM_VARIABLE
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SET GLOBAL session_track_system_variables='a';
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connect (con,localhost,root,,test);
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--enable_session_track_info
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SET NAMES 'utf8';
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SET NAMES 'big5';
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--disable_session_track_info
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select @@session_track_system_variables;
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connection default;
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disconnect con;
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SET GLOBAL session_track_system_variables=default;
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SET GLOBAL event_scheduler=default;
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--echo # End of 10.4 test
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--echo #
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--echo # MDEV-16470 - Session user variables tracker
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--echo #
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#SET @@session.session_track_user_variables=1;
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#--enable_session_track_info
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#SET @a=1;
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#SET @b=NULL;
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#SELECT @c:=10;
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#--disable_session_track_info
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#SET @@session.session_track_user_variables=0;
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#--echo #
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#--echo # mdev-22337 Assertion `Alloced_length >= (str_length + length +
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#--echo net_length_size(length))' failed in Binary_string::q_net_store_data
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#--echo on long MULTIPOLYGON query with session_track_user_variables=1
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#--echo (optimized builds)
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#--echo #
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#set @@session.session_track_user_variables=1;
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#--enable_session_track_info
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#set @a=repeat('X', 1029);
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#--disable_session_track_info
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#set @@session.session_track_user_variables=0;
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#--echo #
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#--echo # MDEV-22709 Assertion `store.length() <= (256L*256L*256L-1)' failed in net_send_ok
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#--echo #
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#SET SESSION session_track_user_variables=1;
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#SET @inserted_value=REPEAT(1,16777180); # Only crashes when >=16777180 (max = 16777216)
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--echo # End of 10.5 tests
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--echo #
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--echo # MDEV-31746 Problems with tx_isolation after MDEV-21921
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--echo #
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--echo # tracking info on
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--enable_session_track_info
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SET session_track_system_variables='max_insert_delayed_threads';
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SET max_delayed_threads=0;
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SET @@max_delayed_threads=0;
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SET SESSION max_delayed_threads=0;
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SET session_track_system_variables='max_delayed_threads';
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SET max_insert_delayed_threads=@@global.max_delayed_threads;
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SET session_track_system_variables='tx_isolation';
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SET @@session.tx_isolation='READ-COMMITTED';
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SET SESSION tx_isolation='READ-UNCOMMITTED';
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SET SESSION transaction_isolation='REPEATABLE-READ';
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--echo Track 2, get 2
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SET session_track_system_variables='tx_isolation,transaction_isolation';
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select @@session_track_system_variables;
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SET @@session.tx_isolation='READ-COMMITTED';
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SET SESSION tx_isolation='READ-UNCOMMITTED';
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SET SESSION transaction_isolation='REPEATABLE-READ';
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SET session_track_system_variables='transaction_isolation';
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SET @@session.tx_isolation='READ-COMMITTED';
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SET SESSION tx_isolation='READ-UNCOMMITTED';
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SET SESSION transaction_isolation='REPEATABLE-READ';
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SET session_track_system_variables='tx_isolation,transaction_isolation,tx_isolation';
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SELECT @@session_track_system_variables;
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SET @@session.tx_isolation='READ-COMMITTED';
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SET SESSION tx_isolation='READ-UNCOMMITTED';
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SET SESSION transaction_isolation='REPEATABLE-READ';
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--echo accumulate as we encounter duplicates
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SET session_track_system_variables='*';
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SET @@session.tx_isolation='READ-COMMITTED';
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SET SESSION tx_isolation='READ-UNCOMMITTED';
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SET SESSION transaction_isolation='REPEATABLE-READ';
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# TEST GAP, there are no aliases of Sys_var_bit variables, implemented but
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# no tests yet.
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--disable_session_track_info
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--echo # End of 11.1 tests
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