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information about different variables agged to query cache (BUG#5515, BUG#5394)

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bell@sanja.is.com.ua 2004-09-10 16:28:18 +03:00
parent 69695656a1
commit 24e1464d5a
5 changed files with 100 additions and 5 deletions
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56
mysql-test/r/query_cache.result
View File

@ -851,4 +851,60 @@ select @@character_set_results;
@@character_set_results
NULL
set character_set_results=default;
set GLOBAL query_cache_size=1355776;
create table t1 (id int auto_increment primary key, c char(25));
insert into t1 set c = repeat('x',24);
insert into t1 set c = concat(repeat('x',24),'x');
insert into t1 set c = concat(repeat('x',24),'w');
insert into t1 set c = concat(repeat('x',24),'y');
set max_sort_length=200;
select c from t1 order by c, id;
c
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxw
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxy
reset query cache;
set max_sort_length=20;
select c from t1 order by c, id;
c
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxw
xxxxxxxxxxxxxxxxxxxxxxxxy
set max_sort_length=200;
select c from t1 order by c, id;
c
xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxw
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxy
set max_sort_length=default;
select '1' || '3' from t1;
'1' || '3'
1
1
1
1
set SQL_MODE=oracle;
select '1' || '3' from t1;
'1' || '3'
13
13
13
13
set SQL_MODE=default;
drop table t1;
create table t1 (a varchar(20), b int);
insert into t1 values ('12345678901234567890', 1);
set group_concat_max_len=10;
select group_concat(a) FROM t1 group by b;
group_concat(a)
1234567890
set group_concat_max_len=1024;
select group_concat(a) FROM t1 group by b;
group_concat(a)
12345678901234567890
set group_concat_max_len=default;
drop table t1;
SET GLOBAL query_cache_size=0;

34
mysql-test/t/query_cache.test
View File

@ -627,4 +627,38 @@ set character_set_results=null;
select @@character_set_results;
set character_set_results=default;
#
# query cache and environment variables
#
# max_sort_length
set GLOBAL query_cache_size=1355776;
create table t1 (id int auto_increment primary key, c char(25));
insert into t1 set c = repeat('x',24);
insert into t1 set c = concat(repeat('x',24),'x');
insert into t1 set c = concat(repeat('x',24),'w');
insert into t1 set c = concat(repeat('x',24),'y');
set max_sort_length=200;
select c from t1 order by c, id;
reset query cache;
set max_sort_length=20;
select c from t1 order by c, id;
set max_sort_length=200;
select c from t1 order by c, id;
set max_sort_length=default;
# sql_mode
select '1' || '3' from t1;
set SQL_MODE=oracle;
select '1' || '3' from t1;
set SQL_MODE=default;
drop table t1;
# group_concat_max_len
create table t1 (a varchar(20), b int);
insert into t1 values ('12345678901234567890', 1);
set group_concat_max_len=10;
select group_concat(a) FROM t1 group by b;
set group_concat_max_len=1024;
select group_concat(a) FROM t1 group by b;
set group_concat_max_len=default;
drop table t1;
SET GLOBAL query_cache_size=0;

3
sql/mysql_priv.h
View File

@ -390,6 +390,9 @@ struct Query_cache_query_flags
uint collation_connection_num;
ha_rows limit;
Time_zone *time_zone;
ulong sql_mode;
ulong max_sort_length;
ulong group_concat_max_len;
};
#define QUERY_CACHE_FLAGS_SIZE sizeof(Query_cache_query_flags)
#include "sql_cache.h"

8
sql/sql_cache.cc
View File

@ -787,6 +787,9 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
thd->variables.collation_connection->number;
flags.limit= thd->variables.select_limit;
flags.time_zone= thd->variables.time_zone;
flags.sql_mode= thd->variables.sql_mode;
flags.max_sort_length= thd->variables.max_sort_length;
flags.group_concat_max_len= thd->variables.group_concat_max_len;
STRUCT_LOCK(&structure_guard_mutex);
if (query_cache_size == 0)
@ -974,8 +977,11 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
flags.collation_connection_num= thd->variables.collation_connection->number;
flags.limit= thd->variables.select_limit;
flags.time_zone= thd->variables.time_zone;
flags.sql_mode= thd->variables.sql_mode;
flags.max_sort_length= thd->variables.max_sort_length;
flags.group_concat_max_len= thd->variables.group_concat_max_len;
memcpy((void *)(sql + (tot_length - QUERY_CACHE_FLAGS_SIZE)),
&flags, QUERY_CACHE_FLAGS_SIZE);
&flags, QUERY_CACHE_FLAGS_SIZE);
query_block = (Query_cache_block *) hash_search(&queries, (byte*) sql,
tot_length);
/* Quick abort on unlocked data */

4
sql/sql_cache.h
View File

@ -53,10 +53,6 @@
of list of free blocks */
#define QUERY_CACHE_MEM_BIN_TRY 5
/* query flags masks */
#define QUERY_CACHE_CLIENT_LONG_FLAG_MASK 0x80
#define QUERY_CACHE_CHARSET_CONVERT_MASK 0x7F
/* packing parameters */
#define QUERY_CACHE_PACK_ITERATION 2
#define QUERY_CACHE_PACK_LIMIT (512*1024L)