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f691d9865b
This feature adds the functionality of ignorability for indexes. Indexes are not ignored be default. To control index ignorability explicitly for a new index, use IGNORE or NOT IGNORE as part of the index definition for CREATE TABLE, CREATE INDEX, or ALTER TABLE. Primary keys (explicit or implicit) cannot be made ignorable. The table INFORMATION_SCHEMA.STATISTICS get a new column named IGNORED that would store whether an index needs to be ignored or not.
284 lines
11 KiB
Text
284 lines
11 KiB
Text
# restart
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set @save_use_stat_tables=@@use_stat_tables;
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set use_stat_tables='preferably';
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DROP DATABASE IF EXISTS dbt3_s001;
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CREATE DATABASE dbt3_s001;
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use dbt3_s001;
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set @save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='extended_keys=off';
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select * from mysql.table_stats;
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db_name table_name cardinality
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dbt3_s001 customer 150
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dbt3_s001 lineitem 6005
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dbt3_s001 nation 25
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dbt3_s001 orders 1500
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dbt3_s001 part 200
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dbt3_s001 partsupp 700
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dbt3_s001 region 5
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dbt3_s001 supplier 10
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select * from mysql.index_stats;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 customer PRIMARY 1 1.0000
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dbt3_s001 customer i_c_nationkey 1 6.0000
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_receiptdate 1 2.6477
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 nation PRIMARY 1 1.0000
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dbt3_s001 nation i_n_regionkey 1 5.0000
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dbt3_s001 orders PRIMARY 1 1.0000
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dbt3_s001 orders i_o_orderdate 1 1.3321
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dbt3_s001 orders i_o_custkey 1 15.0000
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dbt3_s001 part PRIMARY 1 1.0000
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dbt3_s001 partsupp PRIMARY 1 3.5000
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dbt3_s001 partsupp PRIMARY 2 1.0000
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dbt3_s001 partsupp i_ps_partkey 1 3.5000
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dbt3_s001 partsupp i_ps_suppkey 1 70.0000
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dbt3_s001 region PRIMARY 1 1.0000
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dbt3_s001 supplier PRIMARY 1 1.0000
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dbt3_s001 supplier i_s_nationkey 1 1.1111
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flush table lineitem;
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set use_stat_tables='never';
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select round(sum(l_extendedprice*l_discount),4) as revenue
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from lineitem
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where l_shipdate >= date '1994-01-01'
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and l_shipdate < date '1994-01-01' + interval '1' year
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and l_discount between 0.06 - 0.01 and 0.06 + 0.01
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and l_quantity < 24;
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revenue
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77949.9186
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connect con1, localhost, root,,;
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connect con2, localhost, root,,;
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connection con1;
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set debug_sync='statistics_mem_alloc_start1 WAIT_FOR second_thread_started_too';
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set debug_sync='statistics_mem_alloc_start2 SIGNAL first_thread_working';
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use dbt3_s001;
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set use_stat_tables='preferably';
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select round(sum(l_extendedprice*l_discount),4) as revenue
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from lineitem
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where l_shipdate >= date '1994-01-01'
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and l_shipdate < date '1994-01-01' + interval '1' year
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and l_discount between 0.06 - 0.01 and 0.06 + 0.01
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and l_quantity < 24 ;
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connection con2;
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set debug_sync='statistics_mem_alloc_start1 SIGNAL second_thread_started_too';
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set debug_sync='statistics_mem_alloc_start2 WAIT_FOR first_thread_working';
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use dbt3_s001;
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set use_stat_tables='preferably';
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select round(sum(l_extendedprice*l_discount),4) as revenue
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from lineitem
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where l_shipdate >= date '1994-01-01'
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and l_shipdate < date '1994-01-01' + interval '1' year
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and l_discount between 0.06 - 0.01 and 0.06 + 0.01
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and l_quantity < 24;
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connection con1;
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revenue
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77949.9186
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connection con2;
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revenue
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77949.9186
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connection default;
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set use_stat_tables='preferably';
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disconnect con1;
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disconnect con2;
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set debug_sync='RESET';
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select * from mysql.index_stats where table_name='lineitem' order by index_name;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_receiptdate 1 2.6477
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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delete from mysql.index_stats
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where table_name='lineitem' and
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index_name in ('i_l_shipdate', 'i_l_receiptdate');
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select * from mysql.index_stats where table_name='lineitem' order by index_name;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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analyze table lineitem persistent for columns() indexes (i_l_shipdate);
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select * from mysql.index_stats where table_name='lineitem' order by index_name;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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delete from mysql.index_stats
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where table_name='lineitem' and index_name= 'i_l_shipdate';
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select * from mysql.index_stats where table_name='lineitem' order by index_name;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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connect con1, localhost, root,,;
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connect con2, localhost, root,,;
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connection con1;
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set debug_sync='statistics_collection_start1 WAIT_FOR second_thread_started_too';
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set debug_sync='statistics_collection_start2 SIGNAL first_thread_working';
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use dbt3_s001;
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set use_stat_tables='preferably';
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analyze table lineitem persistent for columns() indexes (i_l_shipdate);
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connection con2;
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set debug_sync='statistics_collection_start1 SIGNAL second_thread_started_too';
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set debug_sync='statistics_collection_start2 WAIT_FOR first_thread_working';
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use dbt3_s001;
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set use_stat_tables='preferably';
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analyze table lineitem persistent for columns() indexes (i_l_receiptdate);
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connection con1;
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connection con2;
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connection default;
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disconnect con1;
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disconnect con2;
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set debug_sync='RESET';
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select * from mysql.index_stats where table_name='lineitem' order by index_name, prefix_arity;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_receiptdate 1 2.6477
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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select * from mysql.index_stats where table_name='lineitem'
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order by index_name, prefix_arity;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_receiptdate 1 2.6477
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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set debug_sync='RESET';
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connect con1, localhost, root,,;
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connect con2, localhost, root,,;
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connection con1;
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set debug_sync='statistics_collection_start SIGNAL parked WAIT_FOR finish';
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use dbt3_s001;
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set use_stat_tables='preferably';
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analyze table lineitem persistent for all;
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connection con2;
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set debug_sync='now WAIT_FOR parked';
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use dbt3_s001;
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set use_stat_tables='never';
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set debug_sync='now SIGNAL finish';
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connection con1;
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connection default;
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disconnect con1;
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disconnect con2;
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set debug_sync='RESET';
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select * from mysql.index_stats where table_name='lineitem'
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order by index_name, prefix_arity;
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db_name table_name index_name prefix_arity avg_frequency
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dbt3_s001 lineitem PRIMARY 1 4.0033
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dbt3_s001 lineitem PRIMARY 2 1.0000
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dbt3_s001 lineitem i_l_commitdate 1 2.7160
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dbt3_s001 lineitem i_l_orderkey 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 1 4.0033
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dbt3_s001 lineitem i_l_orderkey_quantity 2 1.0404
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dbt3_s001 lineitem i_l_partkey 1 30.0250
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dbt3_s001 lineitem i_l_receiptdate 1 2.6477
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dbt3_s001 lineitem i_l_shipdate 1 2.6500
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dbt3_s001 lineitem i_l_suppkey 1 600.5000
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dbt3_s001 lineitem i_l_suppkey_partkey 1 30.0250
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dbt3_s001 lineitem i_l_suppkey_partkey 2 8.5786
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set @save_global_use_stat_tables=@@global.use_stat_tables;
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set global use_stat_tables='preferably';
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set debug_sync='RESET';
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connect con1, localhost, root,,;
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connect con2, localhost, root,,;
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connection con1;
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set debug_sync='statistics_update_start SIGNAL parker WAIT_FOR go1 EXECUTE 1';
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set debug_sync='thr_multi_lock_before_thr_lock SIGNAL go2 EXECUTE 3';
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use dbt3_s001;
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analyze table lineitem persistent for all;
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connection con2;
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set debug_sync='open_and_process_table WAIT_FOR parker';
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set debug_sync='statistics_read_start SIGNAL go1 WAIT_FOR go2';
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use dbt3_s001;
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select * from mysql.index_stats, lineitem where index_name= 'i_l_shipdate' and l_orderkey=1 and l_partkey=68 order by prefix_arity;;
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connection con1;
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connection con2;
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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
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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
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connection default;
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disconnect con1;
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disconnect con2;
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set debug_sync='RESET';
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set global use_stat_tables=@save_global_use_stat_tables;
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DROP DATABASE dbt3_s001;
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use test;
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set @save_global_use_stat_tables=@@global.use_stat_tables;
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set global use_stat_tables='preferably';
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set debug_sync='RESET';
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create table t1 (a int, b int, key(a));
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insert t1 values (1,1),(2,2);
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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SET debug_sync='after_open_table_ignore_flush WAIT_FOR go';
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select * from information_schema.statistics where table_schema='test';
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connect con1, localhost, root;
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connection con1;
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select * from t1;
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a b
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1 1
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2 2
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SET DEBUG_SYNC= "now SIGNAL go";
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connection default;
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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
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def test t1 1 test a 1 a A 2 NULL NULL YES BTREE NO
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connection default;
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disconnect con1;
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set debug_sync='RESET';
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drop table t1;
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set global use_stat_tables=@save_global_use_stat_tables;
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set use_stat_tables=@save_use_stat_tables;
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