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c65cce3698
* various cleanups (mostly cosmetic) * remove useless tests (that were tesing the error condition) * optimize delete_use_source test (from 6 mins to 50 seconds, mainly by removing two huge rollbacks at the end).
152 lines
3.9 KiB
Plaintext
152 lines
3.9 KiB
Plaintext
create table t1(c1 integer not null,c2 integer not null, key (c1)) engine=InnoDb;
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create view v1 as select * from t1 where c1 in (0,1);
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insert t1 select 0,seq from seq_1_to_500;
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insert t1 select 1,seq from seq_1_to_50;
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insert t1 select 2,seq from seq_1_to_20;
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insert t1 select 3,seq from seq_1_to_20;
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#
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# Delete with limit (quick select - range acces)
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#
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start transaction;
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) = 500 limit 1;
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affected rows: 1
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) = 500 limit 1;
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affected rows: 0
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select count(*) from v1 where c1=0;
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count(*)
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499
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rollback;
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#
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# Delete
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#
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start transaction;
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) = 500 ;
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affected rows: 500
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rollback;
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#
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# Delete with exists
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#
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start transaction;
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select count(*) from v1 where c1=2;
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count(*)
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0
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delete from t1 where c1=2 and exists(select 'x' from t1 b where b.c2<10);
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affected rows: 20
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delete from t1 where c1=2 and exists(select 'x' from t1 b where b.c2<10);
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affected rows: 0
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select count(*) from v1 where c1=2;
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count(*)
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0
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rollback;
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#
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# Delete throw a view with limit (range access)
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#
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start transaction;
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explain delete from v1 where (select count(*) from t1 b where b.c1=v1.c1) = 500 limit 1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 range c1 c1 4 NULL 550 Using where
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2 DEPENDENT SUBQUERY b ref c1 c1 4 test.t1.c1 82 Using index
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delete from v1 where (select count(*) from t1 b where b.c1=v1.c1) = 500 limit 1;
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affected rows: 1
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delete from v1 where (select count(*) from t1 b where b.c1=v1.c1) = 500 limit 1;
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affected rows: 0
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select count(*) from v1 where c1=0;
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count(*)
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499
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rollback;
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#
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# Delete throw a view (ALL access)
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#
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start transaction;
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explain delete from v1 where (select count(*) from t1 b where b.c1=v1.c1) = 500;
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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 c1 NULL NULL NULL 717 Using where
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2 DEPENDENT SUBQUERY b ref c1 c1 4 test.t1.c1 82 Using index
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delete from v1 where (select count(*) from t1 b where b.c1=v1.c1) = 500 ;
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affected rows: 500
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select count(*) from v1 where c1=0;
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count(*)
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0
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rollback;
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#
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# Delete failed due to trigger
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#
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create trigger trg after delete on t1 for each row
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begin
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declare c int;
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begin
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if old.c1 = 1 then
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select count(*) into c from t1 where c1!=old.c1;
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SIGNAL SQLSTATE '45000' set table_name=c;
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end if;
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end;
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end;
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/
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start transaction;
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delete from t1 where c1=1 and (select count(*) from t1 b where b.c1=t1.c1) > 0 order by c2 asc limit 10;
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ERROR 45000: Unhandled user-defined exception condition
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rollback;
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start transaction;
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) > 0 order by c1 desc limit 100;
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ERROR 45000: Unhandled user-defined exception condition
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select c1,count(*) from t1 group by c1;
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c1 count(*)
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0 500
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1 50
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2 20
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3 20
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rollback;
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drop trigger trg;
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#
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# Delete throw a view with returning
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#
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start transaction;
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) = 500 order by c2 asc limit 10 returning c1,c2;
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c1 c2
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0 1
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0 2
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0 3
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0 4
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0 5
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0 6
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0 7
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0 8
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0 9
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0 10
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rollback;
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start transaction;
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delete from t1 where (select count(*) from t1 b where b.c1=t1.c1) = 500 order by c2 desc limit 10 returning c1,c2;
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c1 c2
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0 491
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0 492
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0 493
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0 494
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0 495
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0 496
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0 497
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0 498
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0 499
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0 500
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rollback;
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drop view v1;
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drop table t1;
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#
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# Delete from table with more than 150000 rows
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#
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create table t1(c1 integer not null,c2 integer not null, key (c1));
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insert t1 select 0,seq from seq_1_to_128000;
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insert t1 select 1,seq from seq_1_to_25600;
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select count(*) from t1;
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count(*)
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153600
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# with a lot of memory for sort_buffer_size
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set session sort_buffer_size = 1024000;
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delete from t1 where c1=0 and exists(select 'x' from t1 b where b.c1<10);
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affected rows: 128000
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# with little memory for sort_buffer_size
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insert t1 select 0,seq from seq_1_to_128000;
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set session sort_buffer_size = 1024;
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delete from t1 where c1=0 and exists(select 'x' from t1 b where b.c1<10);
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affected rows: 128000
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drop table t1;
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