database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-01-06 05:22:24 +03:00
Code Activity

Fixed bug mdev-3891.

Browse Source 
If a query referenced some system statistical tables, but not all of them,
then executing an ANALYZE command simultaneously with this query could
lead to a deadlock.
The fix prohibited reading statistics from system statistical tables
for such queries.

Removed the function unlock_tables_n_open_system_tables_for_write()
as not used anymore.
Performed some minor refactoring of the code in sql_statistics.cc.
This commit is contained in:
Igor Babaev
2012-12-12 23:16:54 -08:00
parent 109c104d07
commit 65820439bd
6 changed files with 140 additions and 107 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
mysql-test/r/stat_tables_par_innodb.result
View File

@@ -211,6 +211,21 @@ dbt3_s001 lineitem i_l_shipdate 1 2.6496
dbt3_s001 lineitem i_l_suppkey 1 600.4000
dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0200
dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5771
set @save_global_use_stat_tables=@@global.use_stat_tables;
set global use_stat_tables='preferably';
set debug_sync='RESET';
set debug_sync='statistics_update_start SIGNAL parker WAIT_FOR go1 EXECUTE 1';
set debug_sync='thr_multi_lock_after_thr_lock SIGNAL go2 EXECUTE 2';
use dbt3_s001;
analyze table lineitem persistent for all;
set debug_sync='open_and_process_table WAIT_FOR parker';
set debug_sync='statistics_read_start SIGNAL go1 WAIT_FOR go2';
use dbt3_s001;
select * from mysql.index_stats, lineitem where index_name= 'i_l_shipdate' and l_orderkey=1 and l_partkey=68;
db_name table_name index_name prefix_arity avg_frequency l_orderkey l_partkey l_suppkey l_linenumber l_quantity l_extendedprice l_discount l_tax l_returnflag l_linestatus l_shipDATE l_commitDATE l_receiptDATE l_shipinstruct l_shipmode l_comment
dbt3_s001 lineitem i_l_shipdate 1 2.6496 1 68 9 2 36 34850.16 0.09 0.06 N O 1996-04-12 1996-02-28 1996-04-20 TAKE BACK RETURN MAIL slyly bold pinto beans detect s
set debug_sync='RESET';
set global use_stat_tables=@save_global_use_stat_tables;
DROP DATABASE dbt3_s001;
use test;
set use_stat_tables=@save_use_stat_tables;