mirror of
https://github.com/MariaDB/server.git
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5e345281e3
When inserting a record with update on duplicate keys the server calls the ha_index_read_idx_map handler function to look for the record that violates unique key constraints. The third parameter of this call should mark only the base components of the index where the server is searched for the record. Possible hidden components of the primary key are to be unmarked.
776 lines
26 KiB
Text
776 lines
26 KiB
Text
DROP TABLE IF EXISTS t1,t2,t3,t4;
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DROP DATABASE IF EXISTS dbt3_s001;
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SET SESSION STORAGE_ENGINE='InnoDB';
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CREATE DATABASE dbt3_s001;
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use dbt3_s001;
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set @save_ext_key_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='extended_keys=off';
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explain
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select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
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flush status;
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select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 5
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 const,const 1 Using index
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flush status;
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select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 1
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select count(*) from lineitem
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where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem const PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 8 const,const 1
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flush status;
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select count(*) from lineitem
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where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select count(*) from lineitem
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where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem const PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 8 const,const 1
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flush status;
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select count(*) from lineitem
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where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select count(*) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
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flush status;
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select count(*) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 6
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select count(*) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem range PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 NULL 1 Using where; Using index
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flush status;
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select count(*) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
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count(*)
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1
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 1
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
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flush status;
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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l_orderkey l_linenumber
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1088 3
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1217 1
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1221 3
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 6
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem range PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 NULL 3 Using where; Using index
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flush status;
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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l_orderkey l_linenumber
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1088 3
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1217 1
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1221 3
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 3
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref i_l_shipdate i_l_shipdate 4 const 6 Using index
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flush status;
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select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
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min(l_orderkey)
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130
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 6
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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flush status;
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select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
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min(l_orderkey)
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130
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select min(l_orderkey) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
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flush status;
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select min(l_orderkey) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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min(l_orderkey)
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1088
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 6
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select min(l_orderkey) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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flush status;
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select min(l_orderkey) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
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min(l_orderkey)
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1088
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select max(l_linenumber) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey=130;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
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flush status;
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select max(l_linenumber) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey=130;
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max(l_linenumber)
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2
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 5
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select max(l_linenumber) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey=130;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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flush status;
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select max(l_linenumber) from lineitem
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where l_shipdate='1992-07-01' and l_orderkey=130;
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max(l_linenumber)
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2
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 1
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey=130
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or l_receiptdate='1992-07-01' and l_orderkey=5603;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
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flush status;
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey=130
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or l_receiptdate='1992-07-01' and l_orderkey=5603;
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l_orderkey l_linenumber
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130 2
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5603 2
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 9
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Handler_read_prev 0
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Handler_read_rnd 9
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey=130
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or l_receiptdate='1992-07-01' and l_orderkey=5603;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 8,8 NULL 2 Using sort_union(i_l_shipdate,i_l_receiptdate); Using where
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flush status;
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey=130
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or l_receiptdate='1992-07-01' and l_orderkey=5603;
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l_orderkey l_linenumber
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130 2
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5603 2
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 2
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Handler_read_prev 0
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Handler_read_rnd 2
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
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flush status;
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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l_orderkey l_linenumber
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130 2
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5603 2
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5959 3
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 9
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Handler_read_prev 0
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Handler_read_rnd 9
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=on';
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explain
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 8,8 NULL 3 Using sort_union(i_l_shipdate,i_l_receiptdate); Using where
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flush status;
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select l_orderkey, l_linenumber
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from lineitem use index (i_l_shipdate, i_l_receiptdate)
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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l_orderkey l_linenumber
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130 2
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5603 2
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5959 3
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 3
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Handler_read_prev 0
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Handler_read_rnd 3
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Handler_read_rnd_deleted 0
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Handler_read_rnd_next 0
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set optimizer_switch='extended_keys=off';
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explain
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE lineitem index_merge PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate,PRIMARY,i_l_receiptdate,PRIMARY 4,4,4,4 NULL 2 Using union(intersect(i_l_shipdate,PRIMARY),intersect(i_l_receiptdate,PRIMARY)); Using where
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flush status;
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select l_orderkey, l_linenumber from lineitem
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where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
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or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
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l_orderkey l_linenumber
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130 2
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5603 2
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5959 3
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show status like 'handler_read%';
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Variable_name Value
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Handler_read_first 0
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Handler_read_key 2
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Handler_read_last 0
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Handler_read_next 9
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Handler_read_prev 0
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Handler_read_rnd 3
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Handler_read_rnd_deleted 0
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|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=on';
|
|
explain
|
|
select l_orderkey, l_linenumber from lineitem
|
|
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
|
|
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE lineitem index_merge PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate,i_l_receiptdate 8,8 NULL 3 Using sort_union(i_l_shipdate,i_l_receiptdate); Using where
|
|
flush status;
|
|
select l_orderkey, l_linenumber from lineitem
|
|
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
|
|
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
|
|
l_orderkey l_linenumber
|
|
130 2
|
|
5603 2
|
|
5959 3
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 2
|
|
Handler_read_last 0
|
|
Handler_read_next 3
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 3
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=off';
|
|
explain
|
|
select max(l_orderkey) from lineitem
|
|
where l_partkey between 1 and 10 group by l_partkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE lineitem range i_l_suppkey_partkey,i_l_partkey i_l_partkey 5 NULL # Using where; Using index
|
|
flush status;
|
|
select max(l_orderkey) from lineitem
|
|
where l_partkey between 1 and 10 group by l_partkey;
|
|
max(l_orderkey)
|
|
5984
|
|
5957
|
|
5892
|
|
5856
|
|
5959
|
|
5957
|
|
5794
|
|
5894
|
|
5859
|
|
5632
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 1
|
|
Handler_read_last 0
|
|
Handler_read_next 294
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=on';
|
|
explain
|
|
select max(l_orderkey) from lineitem
|
|
where l_partkey between 1 and 10 group by l_partkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE lineitem range i_l_suppkey_partkey,i_l_partkey i_l_partkey 5 NULL # Using where; Using index for group-by
|
|
flush status;
|
|
select max(l_orderkey) from lineitem
|
|
where l_partkey between 1 and 10 group by l_partkey;
|
|
max(l_orderkey)
|
|
5984
|
|
5957
|
|
5892
|
|
5856
|
|
5959
|
|
5957
|
|
5794
|
|
5894
|
|
5859
|
|
5632
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 21
|
|
Handler_read_last 1
|
|
Handler_read_next 0
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=off';
|
|
explain
|
|
select max(l_orderkey) from lineitem
|
|
where l_suppkey in (1,4) group by l_suppkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE lineitem range i_l_suppkey i_l_suppkey 5 NULL # Using where; Using index
|
|
flush status;
|
|
select max(l_orderkey) from lineitem
|
|
where l_suppkey in (1,4) group by l_suppkey;
|
|
max(l_orderkey)
|
|
5988
|
|
5984
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 2
|
|
Handler_read_last 0
|
|
Handler_read_next 1230
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=on';
|
|
explain
|
|
select max(l_orderkey) from lineitem
|
|
where l_suppkey in (1,4) group by l_suppkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE lineitem range i_l_suppkey i_l_suppkey 5 NULL # Using where; Using index for group-by
|
|
flush status;
|
|
select max(l_orderkey) from lineitem
|
|
where l_suppkey in (1,4) group by l_suppkey;
|
|
max(l_orderkey)
|
|
5988
|
|
5984
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 6
|
|
Handler_read_last 1
|
|
Handler_read_next 0
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
create index i_p_retailprice on part(p_retailprice);
|
|
set optimizer_switch='extended_keys=off';
|
|
explain
|
|
select o_orderkey, p_partkey
|
|
from part use index (i_p_retailprice),
|
|
lineitem use index (i_l_partkey), orders
|
|
where p_retailprice > 1100 and o_orderdate='1997-01-01'
|
|
and o_orderkey=l_orderkey and p_partkey=l_partkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE part range i_p_retailprice i_p_retailprice 9 NULL # Using where; Using index
|
|
1 SIMPLE orders ref PRIMARY,i_o_orderdate i_o_orderdate 4 const # Using index
|
|
1 SIMPLE lineitem ref i_l_partkey i_l_partkey 5 dbt3_s001.part.p_partkey # Using where; Using index
|
|
flush status;
|
|
select o_orderkey, p_partkey
|
|
from part use index (i_p_retailprice),
|
|
lineitem use index (i_l_partkey), orders
|
|
where p_retailprice > 1100 and o_orderdate='1997-01-01'
|
|
and o_orderkey=l_orderkey and p_partkey=l_partkey;
|
|
o_orderkey p_partkey
|
|
5895 200
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 3
|
|
Handler_read_last 0
|
|
Handler_read_next 26
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
set optimizer_switch='extended_keys=on';
|
|
explain
|
|
select o_orderkey, p_partkey
|
|
from part use index (i_p_retailprice),
|
|
lineitem use index (i_l_partkey), orders
|
|
where p_retailprice > 1100 and o_orderdate='1997-01-01'
|
|
and o_orderkey=l_orderkey and p_partkey=l_partkey;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE part range i_p_retailprice i_p_retailprice 9 NULL # Using where; Using index
|
|
1 SIMPLE orders ref PRIMARY,i_o_orderdate i_o_orderdate 4 const # Using index
|
|
1 SIMPLE lineitem ref i_l_partkey i_l_partkey 9 dbt3_s001.part.p_partkey,dbt3_s001.orders.o_orderkey # Using index
|
|
flush status;
|
|
select o_orderkey, p_partkey
|
|
from part use index (i_p_retailprice),
|
|
lineitem use index (i_l_partkey), orders
|
|
where p_retailprice > 1100 and o_orderdate='1997-01-01'
|
|
and o_orderkey=l_orderkey and p_partkey=l_partkey;
|
|
o_orderkey p_partkey
|
|
5895 200
|
|
show status like 'handler_read%';
|
|
Variable_name Value
|
|
Handler_read_first 0
|
|
Handler_read_key 3
|
|
Handler_read_last 0
|
|
Handler_read_next 3
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
#
|
|
# Bug mdev-3851: ref access used instead of expected eq_ref access
|
|
# when extended_keys=on
|
|
#
|
|
create table t0 (a int);
|
|
insert into t0 values (1), (2), (3), (4), (5);
|
|
create index i_p_size on part(p_size);
|
|
set optimizer_switch='extended_keys=on';
|
|
explain
|
|
select * from t0, part ignore index (primary)
|
|
where p_partkey=t0.a and p_size=1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t0 ALL NULL NULL NULL NULL 5 Using where
|
|
1 SIMPLE part eq_ref i_p_size i_p_size 9 const,dbt3_s001.t0.a 1
|
|
select * from t0, part ignore index (primary)
|
|
where p_partkey=t0.a and p_size=1;
|
|
a p_partkey p_name p_mfgr p_brand p_type p_size p_container p_retailprice p_comment
|
|
2 2 blush rosy metallic lemon navajo Manufacturer#1 Brand#13 LARGE BRUSHED BRASS 1 LG CASE 902 final platelets hang f
|
|
drop table t0;
|
|
drop index i_p_size on part;
|
|
DROP DATABASE dbt3_s001;
|
|
use test;
|
|
#
|
|
# LP Bug #914560: query containing IN subquery
|
|
# + extended_keys = on
|
|
#
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET optimizer_switch='materialization=on,semijoin=on';
|
|
SET optimizer_switch='extended_keys=on';
|
|
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1,1), (2,2);
|
|
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
|
|
a b
|
|
1 1
|
|
2 2
|
|
EXPLAIN
|
|
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
|
2 MATERIALIZED s1 ALL NULL NULL NULL NULL 2
|
|
2 MATERIALIZED s2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
|
DROP TABLE t1;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# LP Bug #915291: query using a materialized view
|
|
# + extended_keys = on
|
|
# (valgrinf complains fixed by the patch for bug #914560)
|
|
#
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET optimizer_switch = 'derived_with_keys=on';
|
|
SET optimizer_switch = 'extended_keys=on';
|
|
CREATE TABLE t1 (a varchar(1)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES ('j'), ('v');
|
|
CREATE TABLE t2 (b varchar(1)) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES ('j'), ('v');
|
|
CREATE TABLE t3 (c varchar(1));
|
|
INSERT INTO t2 VALUES ('m'), ('n');
|
|
CREATE VIEW v
|
|
AS SELECT DISTINCT * FROM t2 STRAIGHT_JOIN t3;
|
|
SELECT * FROM t1, v WHERE a = b;
|
|
a b c
|
|
DROP VIEW v;
|
|
DROP TABLE t1,t2,t3;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# LP Bug #921167: query containing IN subquery
|
|
# + extended_keys = on
|
|
#
|
|
CREATE TABLE t1 (
|
|
a int NOT NULL, b varchar(1) NOT NULL, KEY(a), KEY(b,a)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(0,'j'), (8,'v'), (1,'c'), (8,'m'), (9,'d'),
|
|
(24,'d'), (6,'y'), (1,'t'), (6,'d'), (2,'s');
|
|
CREATE TABLE t2 (
|
|
c int NOT NULL PRIMARY KEY
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t2 VALUES
|
|
(10), (11), (12), (13), (14),
|
|
(15), (16), (17), (18), (19), (24);
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET optimizer_switch = 'extended_keys=off';
|
|
EXPLAIN
|
|
SELECT a FROM t1 AS t, t2
|
|
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t index a,b b 7 NULL 10 Using index
|
|
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index
|
|
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t)
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
|
|
SELECT a FROM t1 AS t, t2
|
|
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
|
|
a
|
|
24
|
|
SET optimizer_switch = 'extended_keys=on';
|
|
EXPLAIN
|
|
SELECT a FROM t1 AS t, t2
|
|
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t index a,b b 7 NULL 10 Using index
|
|
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index
|
|
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t)
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
|
|
SELECT a FROM t1 AS t, t2
|
|
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
|
|
a
|
|
24
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# LP Bug #923236: hash join + extended_keys = on
|
|
#
|
|
CREATE TABLE t1 (a int) ENGINE=MyISAM;
|
|
CREATE TABLE t2 (b int) ENGINE=MyISAM;
|
|
INSERT INTO t1 (a) VALUES (4), (6);
|
|
INSERT INTO t2 (b) VALUES (0), (8);
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
SET join_cache_level=3;
|
|
SET optimizer_switch='join_cache_hashed=on';
|
|
SET optimizer_switch='join_cache_bka=on';
|
|
SET optimizer_switch='extended_keys=on';
|
|
EXPLAIN
|
|
SELECT * FROM t1, t2 WHERE b=a;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 2 Using where; Using join buffer (flat, BNLH join)
|
|
SELECT * FROM t1, t2 WHERE b=a;
|
|
a b
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug mdev-3888: INSERT with UPDATE on duplicate keys
|
|
# with extended_keys=on
|
|
#
|
|
CREATE TABLE t1 (
|
|
c1 bigint(20) unsigned NOT NULL AUTO_INCREMENT,
|
|
c2 bigint(20) unsigned NOT NULL,
|
|
c3 bigint(20) unsigned NOT NULL,
|
|
c4 varchar(128) DEFAULT NULL,
|
|
PRIMARY KEY (c1),
|
|
UNIQUE KEY uq (c2,c3),
|
|
KEY c3 (c3),
|
|
KEY c4 (c4)
|
|
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
|
|
set @save_optimizer_switch=@@optimizer_switch;
|
|
set session optimizer_switch='extended_keys=off';
|
|
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
|
|
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
|
|
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
|
|
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
|
|
DELETE FROM t1;
|
|
set session optimizer_switch='extended_keys=on';
|
|
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
|
|
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
|
|
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
|
|
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
DROP TABLE t1;
|
|
set optimizer_switch=@save_ext_key_optimizer_switch;
|
|
SET SESSION STORAGE_ENGINE=DEFAULT;
|