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0574bc894b
Analysis: The send_data method of the result sink class used to collect data statistics about materialized subqueries incorrectly assumed that duplicate rows are removed prior to calling send_data. As a result the collected statistics was wrong, which resulted in an incorrect maximal number of keys in the Ordered_key buffer. Solution: Try to insert each row into the materialized temp table before collecting statistics, and if the insertion results in a duplicate row, do not count the current row.
65 lines
2.9 KiB
Text
65 lines
2.9 KiB
Text
drop table if exists t1, t2;
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#
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# LP BUG#608744
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#
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set @save_optimizer_switch=@@optimizer_switch;
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set @@optimizer_switch="materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off";
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create table t1 (a1 char(1), a2 char(1));
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insert into t1 values (NULL, 'b');
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create table t2 (b1 char(1), b2 char(2));
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insert into t2 values ('a','b'), ('c', 'd');
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select * from t1 where (a1, a2) NOT IN (select b1, b2 from t2);
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a1 a2
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drop table t1,t2;
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set @@optimizer_switch=@save_optimizer_switch;
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#
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# LP BUG#601156
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#
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CREATE TABLE t1 (a1 int DEFAULT NULL, a2 int DEFAULT NULL);
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INSERT INTO t1 VALUES (NULL,2);
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INSERT INTO t1 VALUES (4,NULL);
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CREATE TABLE t2 (b1 int DEFAULT NULL, b2 int DEFAULT NULL);
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INSERT INTO t2 VALUES (6,NULL);
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INSERT INTO t2 VALUES (NULL,0);
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set @save_optimizer_switch=@@optimizer_switch;
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set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on';
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EXPLAIN EXTENDED
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SELECT * FROM (SELECT * FROM t1 WHERE a1 NOT IN (SELECT b2 FROM t2)) table1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 0 0.00 const row not found
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using where
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3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00
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Warnings:
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Note 1003 select NULL AS `a1`,NULL AS `a2` from (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (not(<expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ()))))) `table1`
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DROP TABLE t1, t2;
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set @@optimizer_switch=@save_optimizer_switch;
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#
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# LP BUG#613009 Crash in Ordered_key::get_field_idx
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#
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set @save_optimizer_switch=@@optimizer_switch;
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set @@optimizer_switch='materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=off';
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create table t1 (a1 char(3) DEFAULT NULL, a2 char(3) DEFAULT NULL);
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insert into t1 values (NULL, 'a21'), (NULL, 'a22');
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explain select * from t1 where (a1, a2) not in (select a1, a2 from t1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
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2 SUBQUERY t1 ALL NULL NULL NULL NULL 2
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select * from t1 where (a1, a2) not in (select a1, a2 from t1);
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a1 a2
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drop table t1;
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set @@optimizer_switch=@save_optimizer_switch;
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#
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# LP BUG#680058 void Ordered_key::add_key(rownum_t):
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# Assertion `key_buff_elements && cur_key_idx < key_buff_elements' failed
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#
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create table t1 (f1 char(1), f2 char(1));
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insert into t1 values ('t', '0'), ('0', 't');
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create table t2 (f3 char(1), f4 char(1));
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insert into t2 values ('t', NULL), ('t', NULL), ('d', 'y');
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set @save_optimizer_switch=@@optimizer_switch;
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SET @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,semijoin=off';
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select * from t1 where (f1, f2) not in (select * from t2);
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f1 f2
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0 t
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set @@optimizer_switch=@save_optimizer_switch;
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drop table t1, t2;
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