SET SESSION STORAGE_ENGINE='InnoDB'; set @save_optimizer_switch_for_stat_tables_test=@@optimizer_switch; set optimizer_switch='extended_keys=on'; 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 sum(l_extendedprice*l_discount) 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 77949.91860000002 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 sum(l_extendedprice*l_discount) 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 ; 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 sum(l_extendedprice*l_discount) 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 77949.91860000002 revenue 77949.91860000002 set use_stat_tables='preferably'; 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 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); 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); 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 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'; 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; set debug_sync='now WAIT_FOR parked'; use dbt3_s001; set use_stat_tables='never'; select * from lineitem where l_orderkey=1 and l_partkey=156; 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 1 156 4 1 17 17954.55 0.04 0.02 N O 1996-03-13 1996-02-12 1996-03-22 DELIVER IN PERSON TRUCK blithely regular ideas caj delete from lineitem where l_orderkey=1 and l_partkey=156; select * from lineitem where l_orderkey=1 and l_partkey=156; 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 set debug_sync='now SIGNAL finish'; 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 4.0027 dbt3_s001 lineitem PRIMARY 2 1.0000 dbt3_s001 lineitem i_l_commitdate 1 2.7155 dbt3_s001 lineitem i_l_orderkey 1 4.0027 dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0027 dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404 dbt3_s001 lineitem i_l_partkey 1 30.0200 dbt3_s001 lineitem i_l_receiptdate 1 2.6473 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 DROP DATABASE dbt3_s001; use test; set use_stat_tables=@save_use_stat_tables; set optimizer_switch=@save_optimizer_switch_for_stat_tables_test; SET SESSION STORAGE_ENGINE=DEFAULT;