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Merge of query cache from 4.1 to 5.0

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msvensson@neptunus.homeip.net 2005-02-04 10:56:53 +01:00
parent 3181f5d2b6
commit e54ea9189d
9 changed files with 135 additions and 113 deletions
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26
mysql-test/r/ndb_cache.result
View File

@ -36,22 +36,22 @@ Variable_name Value
Qcache_hits 1
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
select * from t1 order by pk;
pk a b c
1 3 3 First row
2 7 8 Second row
4 5 6 Fourth row
1 3 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1;
select * from t1 order by pk;
pk a b c
1 3 3 First row
2 7 8 Second row
4 5 6 Fourth row
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
@ -81,10 +81,10 @@ show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
use test;
select * from t1;
select * from t1 order by pk;
pk a b c
2 7 8 Second row
1 3 3 First row
2 7 8 Second row
select * from t1 where b=3;
pk a b c
1 3 3 First row
@ -96,11 +96,11 @@ use test;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -110,11 +110,11 @@ Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 5
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -138,7 +138,7 @@ Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -161,7 +161,7 @@ Qcache_inserts 8
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 5 3 First row
@ -171,7 +171,7 @@ Qcache_inserts 9
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 5 3 First row

24
mysql-test/r/ndb_cache2.result
View File

@ -37,10 +37,10 @@ Variable_name Value
Qcache_hits 1
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
4 5 6 Fourth row
2 7 8 Second row
1 3 3 First row
show status like "Qcache_inserts";
Variable_name Value
@ -48,10 +48,10 @@ Qcache_inserts 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
4 5 6 Fourth row
2 7 8 Second row
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
@ -82,7 +82,7 @@ show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
use test;
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 3 3 First row
@ -97,11 +97,11 @@ use test;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -111,11 +111,11 @@ Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 5
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -139,7 +139,7 @@ Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 4 3 First row
@ -162,7 +162,7 @@ Qcache_inserts 8
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 5 3 First row
@ -172,7 +172,7 @@ Qcache_inserts 9
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t1;
select * from t1 order by pk desc;
pk a b c
2 7 8 Second row
1 5 3 First row

20
mysql-test/t/ndb_cache.test
View File

@ -35,10 +35,10 @@ show status like "Qcache_hits";
# Insert a new record and make sure the correct data is returned
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
select * from t1 order by pk;
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1;
select * from t1 order by pk;
show status like "Qcache_hits";
# Perform a "new" query and make sure the query cache is not hit
@ -60,7 +60,7 @@ show status like "Qcache_hits";
connect (con1,localhost,root,,);
connection con1;
use test;
select * from t1;
select * from t1 order by pk;
select * from t1 where b=3;
show status like "Qcache_hits";
@ -70,13 +70,13 @@ connect (con2,localhost,root,,);
connection con2;
use test;
show status like "Qcache_queries_in_cache";
select * from t1;
select * from t1;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
select * from t1;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
@ -92,7 +92,7 @@ show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
@ -103,11 +103,11 @@ show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

20
mysql-test/t/ndb_cache2.test
View File

@ -41,10 +41,10 @@ show status like "Qcache_hits";
# Insert a new record and make sure the correct data is returned
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_hits";
# Perform a "new" query and make sure the query cache is not hit
@ -66,7 +66,7 @@ show status like "Qcache_hits";
connect (con1,localhost,root,,);
connection con1;
use test;
select * from t1;
select * from t1 order by pk desc;
select * from t1 where b=3;
show status like "Qcache_hits";
@ -76,13 +76,13 @@ connect (con2,localhost,root,,);
connection con2;
use test;
show status like "Qcache_queries_in_cache";
select * from t1;
select * from t1;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
select * from t1;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
@ -95,7 +95,7 @@ show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
@ -107,11 +107,11 @@ show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

8
sql/ha_innodb.h
View File

@ -180,10 +180,10 @@ class ha_innobase: public handler
/*
ask handler about permission to cache table during query registration
*/
my_bool cached_table_registration(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *call_back,
ulonglong *engine_data)
my_bool register_query_cache_table(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *call_back,
ulonglong *engine_data)
{
*call_back= innobase_query_caching_of_table_permitted;
*engine_data= 0;

120
sql/ha_ndbcluster.cc
View File

@ -4026,7 +4026,6 @@ ha_ndbcluster::ha_ndbcluster(TABLE *table_arg):
m_force_send(TRUE),
m_autoincrement_prefetch(32),
m_transaction_on(TRUE),
m_use_local_query_cache(FALSE),
m_multi_cursor(NULL)
{
int i;
@ -4820,31 +4819,48 @@ uint ndb_get_commitcount(THD* thd, char* dbname, char* tabname,
DBUG_RETURN(1);
ndb->setDatabaseName(dbname);
if (ndb_get_table_statistics(ndb, tabname, 0, commit_count))
struct Ndb_statistics stat;
if (ndb_get_table_statistics(ndb, tabname, &stat))
DBUG_RETURN(1);
*commit_count= stat.commit_count;
DBUG_RETURN(0);
}
static
my_bool
ndbcluster_cache_retrieval_allowed(
/*======================================*/
/* out: TRUE if permitted, FALSE if not;
note that the value FALSE means invalidation
of query cache if *engine_data is changed */
THD* thd, /* in: thd of the user who is trying to
store a result to the query cache or
retrieve it */
char* full_name, /* in: concatenation of database name,
the null character '\0', and the table
name */
uint full_name_len, /* in: length of the full name, i.e.
len(dbname) + len(tablename) + 1 */
ulonglong *engine_data) /* in: value set in call to
ha_ndbcluster::cached_table_registration
out: if return FALSE this is used to invalidate
all cached queries with this table*/
/*
Check if a cached query can be used.
This is done by comparing the supplied engine_data to commit_count of
the table.
The commit_count is either retrieved from the share for the table, where
it has been cached by the util thread. If the util thread is not started,
NDB has to be contacetd to retrieve the commit_count, this will introduce
a small delay while waiting for NDB to answer.
SYNOPSIS
ndbcluster_cache_retrieval_allowed
thd thread handle
full_name concatenation of database name,
the null character '\0', and the table
name
full_name_len length of the full name,
i.e. len(dbname) + len(tablename) + 1
engine_data parameter retrieved when query was first inserted into
the cache. If the value of engine_data is changed,
all queries for this table should be invalidated.
RETURN VALUE
TRUE Yes, use the query from cache
FALSE No, don't use the cached query, and if engine_data
has changed, all queries for this table should be invalidated
*/
static my_bool
ndbcluster_cache_retrieval_allowed(THD* thd,
char* full_name, uint full_name_len,
ulonglong *engine_data)
{
DBUG_ENTER("ndbcluster_cache_retrieval_allowed");
@ -4861,7 +4877,7 @@ ndbcluster_cache_retrieval_allowed(
if (ndb_get_commitcount(thd, dbname, tabname, &commit_count))
{
*engine_data= *engine_data+1; // invalidate
*engine_data+= 1; // invalidate
DBUG_RETURN(FALSE);
}
DBUG_PRINT("info", ("*engine_data=%llu, commit_count=%llu",
@ -4877,27 +4893,36 @@ ndbcluster_cache_retrieval_allowed(
DBUG_RETURN(TRUE);
}
/**
Register a table for use in the query cache. Fetch the commit_count
for the table and return it in engine_data, this will later be used
to check if the table has changed, before the cached query is reused.
SYNOPSIS
ha_ndbcluster::can_query_cache_table
thd thread handle
full_name concatenation of database name,
the null character '\0', and the table
name
full_name_len length of the full name,
i.e. len(dbname) + len(tablename) + 1
qc_engine_callback function to be called before using cache on this table
engine_data out, commit_count for this table
RETURN VALUE
TRUE Yes, it's ok to cahce this query
FALSE No, don't cach the query
*/
my_bool
ha_ndbcluster::cached_table_registration(
/*======================================*/
/* out: TRUE if permitted, FALSE if not;
note that the value FALSE means invalidation
of query cache if *engine_data is changed */
THD* thd, /* in: thd of the user who is trying to
store a result to the query cache or
retrieve it */
char* full_name, /* in: concatenation of database name,
the null character '\0', and the table
name */
uint full_name_len, /* in: length of the full name, i.e.
len(dbname) + len(tablename) + 1 */
qc_engine_callback
*engine_callback, /* out: function to be called before using
cache on this table */
ulonglong *engine_data) /* out: if return FALSE this is used to
invalidate all cached queries with this table*/
ha_ndbcluster::register_query_cache_table(THD* thd,
char* full_name, uint full_name_len,
qc_engine_callback *engine_callback,
ulonglong *engine_data)
{
DBUG_ENTER("ha_ndbcluster::cached_table_registration");
DBUG_ENTER("ha_ndbcluster::register_query_cache_table");
bool is_autocommit= !(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN));
DBUG_PRINT("enter",("dbname=%s, tabname=%s, is_autocommit=%d",
@ -5139,10 +5164,6 @@ ndb_get_table_statistics(Ndb* ndb, const char * table,
pOp->close(TRUE);
ndb->closeTransaction(pTrans);
if(row_count)
*row_count= sum_rows;
if(commit_count)
*commit_count= sum_commits;
ndbstat->row_count= sum_rows;
ndbstat->commit_count= sum_commits;
@ -5662,13 +5683,12 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,arg __attribute__((unused))
// Contact NDB to get commit count for table
g_ndb->setDatabaseName(db);
Uint64 rows, commit_count;
if(ndb_get_table_statistics(g_ndb, tabname,
&rows, &commit_count) == 0){
struct Ndb_statistics stat;;
if(ndb_get_table_statistics(g_ndb, tabname, &stat) == 0){
DBUG_PRINT("ndb_util_thread",
("Table: %s, rows: %llu, commit_count: %llu",
share->table_name, rows, commit_count));
share->commit_count= commit_count;
share->table_name, stat.row_count, stat.commit_count));
share->commit_count= stat.commit_count;
}
else
{

10
sql/ha_ndbcluster.h
View File

@ -157,11 +157,11 @@ class ha_ndbcluster: public handler
static Thd_ndb* seize_thd_ndb();
static void release_thd_ndb(Thd_ndb* thd_ndb);
uint8 table_cache_type();
my_bool cached_table_registration(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *engine_callback,
ulonglong *engine_data);
private:
my_bool register_query_cache_table(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *engine_callback,
ulonglong *engine_data);
private:
int alter_table_name(const char *to);
int drop_table();
int create_index(const char *name, KEY *key_info, bool unique);

11
sql/handler.h
View File

@ -592,11 +592,12 @@ public:
/* Type of table for caching query */
virtual uint8 table_cache_type() { return HA_CACHE_TBL_NONTRANSACT; }
/* ask handler about permission to cache table during query registration */
virtual my_bool cached_table_registration(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *engine_callback,
ulonglong *engine_data)
/* ask handler about permission to cache table when query is to be cached */
virtual my_bool register_query_cache_table(THD *thd, char *table_key,
uint key_length,
qc_engine_callback
*engine_callback,
ulonglong *engine_data)
{
*engine_callback= 0;
return 1;

9
sql/sql_cache.cc
View File

@ -2770,10 +2770,11 @@ my_bool Query_cache::ask_handler_allowance(THD *thd,
for (; tables_used; tables_used= tables_used->next_global)
{
TABLE *table= tables_used->table;
if (!handler->cached_table_registration(thd, table->s->table_cache_key,
table->s->key_length,
&tables_used->callback_func,
&tables_used->engine_data))
handler *handler= table->file;
if (!handler->register_query_cache_table(thd, table->s->table_cache_key,
table->s->key_length,
&tables_used->callback_func,
&tables_used->engine_data))
{
DBUG_PRINT("qcache", ("Handler does not allow caching for %s.%s",
tables_used->db, tables_used->alias));