create table t1 (c1 int, c2 varchar(255), c3 geometry not null, primary key(c1, c2), spatial index (c3))engine=innodb;
create function rand_string(str_length tinyint unsigned, str_type tinyint unsigned) returns varchar(255)
begin
declare counter int unsigned default 0;
declare const_chars varchar(64) default '0123456789';
declare result varchar(255) default ''; if str_type = 1 then set const_chars = '0123456789';
elseif str_type = 2 then set const_chars = 'abcdefghijklmnopqrstuvwxyz';
elseif str_type = 3 then set const_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
elseif str_type = 4 then set const_chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
elseif str_type = 5 then set const_chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
else set const_chars = '0123456789';
end if;
while counter < str_length do set result = concat(result,substr(const_chars,ceil(rand()*(length(const_chars)-1)),1)); set counter = counter + 1;
end while; return result;
end|
create procedure insert_t1(IN total int)
begin
declare i int default 1;
declare i2 int default 1;
declare str varchar(100) default '';
declare dup_key int default 1;
while i <= total DO set i2 = floor(0+(rand()*100)); set str = rand_string(i2, 5);
select count(*) into dup_key from t1 where c2 = str and c1 = i;
while dup_key <> 0 do set i2 = floor(0+(rand()*100)); set str = rand_string(i2, 5);
select count(*) into dup_key from t1 where c2 = str and c1 = i;
end while;
insert into t1 values (i, str, Point(i, i)); set i = i + 1;
end while;
end|
CALL insert_t1(10000);
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
start transaction;
CALL insert_t1(30000);
rollback;
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
drop procedure insert_t1;
drop function rand_string;
drop table t1;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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