# restart
set @save_use_stat_tables=@@use_stat_tables;
set use_stat_tables='preferably';
DROP DATABASE IF EXISTS dbt3_s001;
CREATE DATABASE dbt3_s001;
use dbt3_s001;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
select * from mysql.table_stats;
db_name	table_name	cardinality
dbt3_s001	customer	150
dbt3_s001	lineitem	6005
dbt3_s001	nation	25
dbt3_s001	orders	1500
dbt3_s001	part	200
dbt3_s001	partsupp	700
dbt3_s001	region	5
dbt3_s001	supplier	10
select * from mysql.index_stats;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	customer	PRIMARY	1	1.0000
dbt3_s001	customer	i_c_nationkey	1	6.0000
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	nation	PRIMARY	1	1.0000
dbt3_s001	nation	i_n_regionkey	1	5.0000
dbt3_s001	orders	PRIMARY	1	1.0000
dbt3_s001	orders	i_o_orderdate	1	1.3321
dbt3_s001	orders	i_o_custkey	1	15.0000
dbt3_s001	part	PRIMARY	1	1.0000
dbt3_s001	partsupp	PRIMARY	1	3.5000
dbt3_s001	partsupp	PRIMARY	2	1.0000
dbt3_s001	partsupp	i_ps_partkey	1	3.5000
dbt3_s001	partsupp	i_ps_suppkey	1	70.0000
dbt3_s001	region	PRIMARY	1	1.0000
dbt3_s001	supplier	PRIMARY	1	1.0000
dbt3_s001	supplier	i_s_nationkey	1	1.1111
flush table lineitem;
set use_stat_tables='never';
select round(sum(l_extendedprice*l_discount),4) as revenue
from lineitem
where l_shipdate >= date '1994-01-01' 
and l_shipdate < date '1994-01-01' + interval '1' year
and l_discount between 0.06 - 0.01 and 0.06 + 0.01
and l_quantity < 24;
revenue
77949.9186
connect  con1, localhost, root,,;
connect  con2, localhost, root,,;
connection con1;
set debug_sync='statistics_mem_alloc_start1  WAIT_FOR second_thread_started_too';
set debug_sync='statistics_mem_alloc_start2  SIGNAL first_thread_working';
use dbt3_s001;
set use_stat_tables='preferably';
select round(sum(l_extendedprice*l_discount),4) as revenue
from lineitem
where l_shipdate >= date '1994-01-01' 
and l_shipdate < date '1994-01-01' + interval '1' year
and l_discount between 0.06 - 0.01 and 0.06 + 0.01
and l_quantity < 24                                            ;
connection con2;
set debug_sync='statistics_mem_alloc_start1  SIGNAL second_thread_started_too';
set debug_sync='statistics_mem_alloc_start2  WAIT_FOR first_thread_working';
use dbt3_s001;
set use_stat_tables='preferably';
select round(sum(l_extendedprice*l_discount),4) as revenue
from lineitem
where l_shipdate >= date '1994-01-01' 
and l_shipdate < date '1994-01-01' + interval '1' year
and l_discount between 0.06 - 0.01 and 0.06 + 0.01
and l_quantity < 24;
connection con1;
revenue
77949.9186
connection con2;
revenue
77949.9186
connection default;
set use_stat_tables='preferably';
disconnect con1;
disconnect con2;
set debug_sync='RESET';
select * from mysql.index_stats where table_name='lineitem' order by index_name;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
delete from mysql.index_stats 
where table_name='lineitem' and
index_name in ('i_l_shipdate', 'i_l_receiptdate');
select * from mysql.index_stats where table_name='lineitem' order by index_name;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
analyze table lineitem persistent for columns() indexes (i_l_shipdate);
select * from mysql.index_stats where table_name='lineitem' order by index_name;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
delete from mysql.index_stats 
where table_name='lineitem' and index_name= 'i_l_shipdate';
select * from mysql.index_stats where table_name='lineitem' order by index_name;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
connect  con1, localhost, root,,;
connect  con2, localhost, root,,;
connection con1;
set debug_sync='statistics_collection_start1  WAIT_FOR second_thread_started_too';
set debug_sync='statistics_collection_start2  SIGNAL first_thread_working';
use dbt3_s001;
set use_stat_tables='preferably';
analyze table lineitem persistent for columns() indexes (i_l_shipdate);
connection con2;
set debug_sync='statistics_collection_start1  SIGNAL second_thread_started_too';
set debug_sync='statistics_collection_start2  WAIT_FOR first_thread_working';
use dbt3_s001;
set use_stat_tables='preferably';
analyze table lineitem persistent for columns() indexes (i_l_receiptdate);
connection con1;
connection con2;
connection default;
disconnect con1;
disconnect con2;
set debug_sync='RESET';
select * from mysql.index_stats where table_name='lineitem' order by index_name, prefix_arity;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
select * from mysql.index_stats where table_name='lineitem'
 order by index_name, prefix_arity;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
set debug_sync='RESET';
connect  con1, localhost, root,,;
connect  con2, localhost, root,,;
connection con1;
set debug_sync='statistics_collection_start SIGNAL parked WAIT_FOR finish';
use dbt3_s001;
set use_stat_tables='preferably';
analyze table lineitem persistent for all;
connection con2;
set debug_sync='now WAIT_FOR parked';
use dbt3_s001;
set use_stat_tables='never';
set debug_sync='now SIGNAL finish';
connection con1;
connection default;
disconnect con1;
disconnect con2;
set debug_sync='RESET';
select * from mysql.index_stats where table_name='lineitem'
  order by index_name, prefix_arity;
db_name	table_name	index_name	prefix_arity	avg_frequency
dbt3_s001	lineitem	PRIMARY	1	4.0033
dbt3_s001	lineitem	PRIMARY	2	1.0000
dbt3_s001	lineitem	i_l_commitdate	1	2.7160
dbt3_s001	lineitem	i_l_orderkey	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	1	4.0033
dbt3_s001	lineitem	i_l_orderkey_quantity	2	1.0404
dbt3_s001	lineitem	i_l_partkey	1	30.0250
dbt3_s001	lineitem	i_l_receiptdate	1	2.6477
dbt3_s001	lineitem	i_l_shipdate	1	2.6500
dbt3_s001	lineitem	i_l_suppkey	1	600.5000
dbt3_s001	lineitem	i_l_suppkey_partkey	1	30.0250
dbt3_s001	lineitem	i_l_suppkey_partkey	2	8.5786
set @save_global_use_stat_tables=@@global.use_stat_tables;
set global use_stat_tables='preferably';
set debug_sync='RESET';
connect  con1, localhost, root,,;
connect  con2, localhost, root,,;
connection con1;
set debug_sync='statistics_update_start SIGNAL parker WAIT_FOR go1 EXECUTE 1';
set debug_sync='thr_multi_lock_before_thr_lock SIGNAL go2 EXECUTE 3';
use dbt3_s001;
analyze table lineitem persistent for all;
connection con2;
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 order by prefix_arity;;
connection con1;
connection con2;
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	2.6500	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
connection default;
disconnect con1;
disconnect con2;
set debug_sync='RESET';
set global use_stat_tables=@save_global_use_stat_tables;
DROP DATABASE dbt3_s001;
use test;
set @save_global_use_stat_tables=@@global.use_stat_tables;
set global use_stat_tables='preferably';
set debug_sync='RESET';
create table t1 (a int, b int, key(a));
insert t1 values (1,1),(2,2);
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
SET debug_sync='after_open_table_ignore_flush WAIT_FOR go';
select * from information_schema.statistics where table_schema='test';
connect con1, localhost, root;
connection con1;
select * from t1;
a	b
1	1
2	2
SET DEBUG_SYNC= "now SIGNAL go";
connection default;
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	NON_UNIQUE	INDEX_SCHEMA	INDEX_NAME	SEQ_IN_INDEX	COLUMN_NAME	COLLATION	CARDINALITY	SUB_PART	PACKED	NULLABLE	INDEX_TYPE	COMMENT	INDEX_COMMENT	IGNORED
def	test	t1	1	test	a	1	a	A	2	NULL	NULL	YES	BTREE			NO
connection default;
disconnect con1;
set debug_sync='RESET';
drop table t1;
set global use_stat_tables=@save_global_use_stat_tables;
set use_stat_tables=@save_use_stat_tables;