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Merge sanja.is.com.ua:/home/bell/mysql/bk/mysql-4.1

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into sanja.is.com.ua:/home/bell/mysql/bk/work-qc-4.1


sql/sql_cache.cc:
  Auto merged
This commit is contained in:
unknown
2003-08-12 23:45:53 +03:00
parent dc271c8fc3 ff9f600f7d
commit 15da156025
3 changed files with 48 additions and 4 deletions
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42
sql/sql_cache.cc
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@ -769,9 +769,18 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
STRUCT_LOCK(&structure_guard_mutex);
if (query_cache_size == 0)
{
STRUCT_UNLOCK(&structure_guard_mutex);
DBUG_VOID_RETURN;
}
DUMP(this);
if (ask_handler_allowance(thd, tables_used))
{
STRUCT_UNLOCK(&structure_guard_mutex);
DBUG_VOID_RETURN;
}
/* Key is query + database + flag */
if (thd->db_length)
{
@ -2548,6 +2557,39 @@ TABLE_COUNTER_TYPE Query_cache::is_cacheable(THD *thd, uint32 query_len,
DBUG_RETURN(0);
}
/*
Check handler allowence to cache query with this tables
SYNOPSYS
Query_cache::ask_handler_allowance()
thd - thread handlers
tables_used - tables list used in query
RETURN
0 - caching allowed
1 - caching disallowed
*/
my_bool Query_cache::ask_handler_allowance(THD *thd,
TABLE_LIST *tables_used)
{
DBUG_ENTER("Query_cache::is_cacheable");
for (; tables_used; tables_used= tables_used->next)
{
TABLE *table= tables_used->table;
if (!handler::caching_allowed(thd, table->table_cache_key,
table->key_length,
table->file->table_cache_type()))
{
DBUG_PRINT("qcache", ("Handler does not allow caching for %s.%s",
tables_used->db, tables_used->alias));
thd->lex.safe_to_cache_query= 0; // Don't try to cache this
DBUG_RETURN(1);
}
}
DBUG_RETURN(0);
}
/*****************************************************************************
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