mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 13:32:33 +01:00
cab1dc628c
New multi-key-cache handling. This was needed becasue the old one didn't work reliable with MERGE tables.
ALTER TABLE table_name ... CHARACTER SET ... now changes all char/varchar/text columns to the given character set
(One must use ALTER TABLE ... DEFAULT CHARACTER SET ... to change the default character set)
Fixed that have_compress is detected properly (fixes problems with func_compress.test on platforms without zlib)
New syntax for CACHE INDEX ('keys' is optional if no index name is given and one mentions the key cache name only ones)
Removed compiler warnings
Added mysql_set_server_option() to allow clients like PHP to easaily set/reset the multi-statement flag.
167 lines
3.7 KiB
Text
167 lines
3.7 KiB
Text
drop table if exists t1, t2;
|
|
create table t1 (
|
|
a int not null auto_increment,
|
|
b char(16) not null,
|
|
primary key (a),
|
|
key (b)
|
|
);
|
|
create table t2(
|
|
a int not null auto_increment,
|
|
b char(16) not null,
|
|
primary key (a),
|
|
key (b)
|
|
);
|
|
insert into t1(b) values
|
|
('test0'),
|
|
('test1'),
|
|
('test2'),
|
|
('test3'),
|
|
('test4'),
|
|
('test5'),
|
|
('test6'),
|
|
('test7');
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
insert into t2(b) select b from t1;
|
|
insert into t1(b) select b from t2;
|
|
select count(*) from t1;
|
|
count(*)
|
|
33448
|
|
select count(*) from t2;
|
|
count(*)
|
|
20672
|
|
flush tables;
|
|
flush status;
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
select count(*) from t1 where b = 'test1';
|
|
count(*)
|
|
4181
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 217
|
|
Key_reads 45
|
|
select count(*) from t1 where b = 'test1';
|
|
count(*)
|
|
4181
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 434
|
|
Key_reads 45
|
|
flush tables;
|
|
flush status;
|
|
select @@preload_buffer_size;
|
|
@@preload_buffer_size
|
|
32768
|
|
load index into cache t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 preload_keys status OK
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
select count(*) from t1 where b = 'test1';
|
|
count(*)
|
|
4181
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 217
|
|
Key_reads 45
|
|
flush tables;
|
|
flush status;
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
set session preload_buffer_size=256*1024;
|
|
select @@preload_buffer_size;
|
|
@@preload_buffer_size
|
|
262144
|
|
load index into cache t1 ignore leaves;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 preload_keys status OK
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
select count(*) from t1 where b = 'test1';
|
|
count(*)
|
|
4181
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 217
|
|
Key_reads 45
|
|
flush tables;
|
|
flush status;
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
set session preload_buffer_size=1*1024;
|
|
select @@preload_buffer_size;
|
|
@@preload_buffer_size
|
|
1024
|
|
load index into cache t1, t2 keys (primary,b) ignore leaves;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 preload_keys status OK
|
|
test.t2 preload_keys status OK
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
select count(*) from t1 where b = 'test1';
|
|
count(*)
|
|
4181
|
|
select count(*) from t2 where b = 'test1';
|
|
count(*)
|
|
2584
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 351
|
|
Key_reads 73
|
|
flush tables;
|
|
flush status;
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
load index into cache t3, t2 keys (primary,b) ;
|
|
Table Op Msg_type Msg_text
|
|
test.t3 preload_keys error Table 'test.t3' doesn't exist
|
|
test.t2 preload_keys status OK
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
flush tables;
|
|
flush status;
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
load index into cache t3 keys (b), t2 keys (c) ;
|
|
Table Op Msg_type Msg_text
|
|
test.t3 preload_keys error Table 'test.t3' doesn't exist
|
|
test.t2 preload_keys error Key column 'c' doesn't exist in table
|
|
test.t2 preload_keys status Operation failed
|
|
show status like "key_read%";
|
|
Variable_name Value
|
|
Key_read_requests 0
|
|
Key_reads 0
|
|
drop table t1, t2;
|