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#
# Test of multiple key caches
#
--disable_warnings
drop table if exists t1, t2, t3;
--enable_warnings
SET @save_key_buffer=@@key_buffer_size;
SELECT @@key_buffer_size, @@small.key_buffer_size;
# Change default key cache size
SET @@global.key_buffer_size=16*1024*1024;
SET @@global.default.key_buffer_size=16*1024*1024;
SET @@global.default.key_buffer_size=16*1024*1024;
SET @@global.small.key_buffer_size=1*1024*1024;
SET @@global.medium.key_buffer_size=4*1024*1024;
# Drop buffer
SET @@global.medium.key_buffer_size=0;
# Test double drop
SET @@global.medium.key_buffer_size=0;
# Print key buffer with different syntaxes
SHOW VARIABLES like "key_buffer_size";
SELECT @@key_buffer_size;
SELECT @@global.key_buffer_size;
SELECT @@global.default.key_buffer_size;
SELECT @@global.default.`key_buffer_size`;
SELECT @@global.`default`.`key_buffer_size`;
SELECT @@`default`.key_buffer_size;
SELECT @@small.key_buffer_size;
SELECT @@medium.key_buffer_size;
SET @@global.key_buffer_size=@save_key_buffer;
#
# Errors
#
--error 1064
SELECT @@default.key_buffer_size;
--error 1272
SELECT @@skr.storage_engine="test";
select @@keycache1.key_cache_block_size;
select @@keycache1.key_buffer_size;
set global keycache1.key_cache_block_size=2048;
select @@keycache1.key_buffer_size;
select @@keycache1.key_cache_block_size;
set global keycache1.key_buffer_size=1*1024*1024;
select @@keycache1.key_buffer_size;
select @@keycache1.key_cache_block_size;
set global keycache2.key_buffer_size=4*1024*1024;
select @@keycache2.key_buffer_size;
select @@keycache2.key_cache_block_size;
set global keycache1.key_buffer_size=0;
select @@keycache1.key_buffer_size;
select @@keycache1.key_cache_block_size;
select @@key_buffer_size;
select @@key_cache_block_size;
set global keycache1.key_buffer_size=1024*1024;
create table t1 (p int primary key, a char(10)) delay_key_write=1 ENGINE=myisam;
create table t2 (p int primary key, i int, a char(10), key k1(i), key k2(a)) ENGINE=myisam;
show status like 'key_blocks_used';
# Following results differs on 64 and 32 bit systems because of different
# pointer sizes, which takes up different amount of space in key cache
--replace_result 837 KEY_BLOCKS_UNUSED 906 KEY_BLOCKS_UNUSED
show status like 'key_blocks_unused';
insert into t1 values (1, 'qqqq'), (11, 'yyyy');
insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
(3, 1, 'yyyy'), (4, 3, 'zzzz');
select * from t1;
select * from t2;
update t1 set p=2 where p=1;
update t2 set i=2 where i=1;
show status like 'key_blocks_used';
--replace_result 833 KEY_BLOCKS_UNUSED 902 KEY_BLOCKS_UNUSED
show status like 'key_blocks_unused';
cache index t1 key (`primary`) in keycache1;
explain select p from t1;
select p from t1;
explain select i from t2;
select i from t2;
explain select count(*) from t1, t2 where t1.p = t2.i;
select count(*) from t1, t2 where t1.p = t2.i;
cache index t2 in keycache1;
update t2 set p=p+1000, i=2 where a='qqqq';
cache index t2 in keycache2;
insert into t2 values (2000, 3, 'yyyy');
cache index t2 in keycache1;
update t2 set p=3000 where a='zzzz';
select * from t2;
explain select p from t2;
select p from t2;
explain select i from t2;
select i from t2;
explain select a from t2;
select a from t2;
# Test some error conditions
--error 1284
cache index t1 in unknown_key_cache;
cache index t1 key (unknown_key) in keycache1;
select @@keycache2.key_buffer_size;
select @@keycache2.key_cache_block_size;
set global keycache2.key_buffer_size=0;
select @@keycache2.key_buffer_size;
select @@keycache2.key_cache_block_size;
set global keycache2.key_buffer_size=1024*1024;
select @@keycache2.key_buffer_size;
update t2 set p=4000 where a='zzzz';
update t1 set p=p+1;
set global keycache1.key_buffer_size=0;
select * from t2;
select p from t2;
explain select i from t2;
select i from t2;
explain select a from t2;
select a from t2;
select * from t1;
select p from t1;
# Use the 'small' key cache
create table t3 (like t1);
cache index t3 in small;
insert into t3 select * from t1;
cache index t3 in keycache2;
cache index t1,t2 in default;
drop table t1,t2,t3;
show status like 'key_blocks_used';
--replace_result 837 KEY_BLOCKS_UNUSED 906 KEY_BLOCKS_UNUSED
show status like 'key_blocks_unused';
# Cleanup
# We don't reset keycache2 as we want to ensure that mysqld will reset it
set global keycache2.key_buffer_size=0;
# Test to set up a too small size for a key cache (bug #2064)
set global keycache3.key_buffer_size=100;
set global keycache3.key_buffer_size=0;
# Restore the changed variable value
-- error 1232
set global key_cache_block_size= @my_key_cache_block_size;
#
# Bug #19079: corrupted index when key_cache_block_size is not multiple of
# myisam_block_size
CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY) ENGINE=MYISAM;
SET @my_key_cache_block_size= @@global.key_cache_block_size;
SET GLOBAL key_cache_block_size=1536;
INSERT INTO t1 VALUES (1);
SELECT @@key_cache_block_size;
CHECK TABLE t1;
DROP TABLE t1;
CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int) ENGINE=MYISAM;
CREATE TABLE t2(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int) ENGINE=MYISAM;
SET GLOBAL key_cache_block_size=1536;
INSERT INTO t1 VALUES (1,0);
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;
SELECT @@key_cache_block_size;
CHECK TABLE t1;
DROP TABLE t1,t2;
# Restore changed variables
set global key_cache_block_size= @my_key_cache_block_size;
#
# Bug#10473 - Can't set 'key_buffer_size' system variable to ZERO
# (One cannot drop the default key cache.)
#
set @@global.key_buffer_size=0;
select @@global.key_buffer_size;
#
# Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables
#
SET @bug28478_key_cache_block_size= @@global.key_cache_block_size;
SET GLOBAL key_cache_block_size= 1536;
CREATE TABLE t1 (
id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
c1 CHAR(50),
c2 CHAR(50),
c3 CHAR(50),
KEY(c1, c2, c3)
) ENGINE= MyISAM;
INSERT INTO t1 (c1, c2, c3) VALUES
('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f'),
('e', 'f', 'g'), ('f', 'g', 'h'), ('g', 'h', 'i'), ('h', 'i', 'j'),
('i', 'j', 'k'), ('j', 'k', 'l'), ('k', 'l', 'm'), ('l', 'm', 'n'),
('m', 'n', 'o'), ('n', 'o', 'p'), ('o', 'p', 'q'), ('p', 'q', 'r'),
('q', 'r', 's'), ('r', 's', 't'), ('s', 't', 'u'), ('t', 'u', 'v'),
('u', 'v', 'w'), ('v', 'w', 'x'), ('w', 'x', 'y'), ('x', 'y', 'z');
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
CHECK TABLE t1;
SHOW VARIABLES LIKE 'key_cache_block_size';
SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
DROP TABLE t1;
# End of 4.1 tests
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