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Bug#27480 (Extend CREATE TEMPORARY TABLES privilege

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to allow temp table operations) -- prerequisite patch #2.

Introduce a new form of find_temporary_table() function:
find_temporary_table() by a table key. It will be used
in further patches.

Replace find_temporary_table(table_list->db, table_list->name)
by more appropiate find_temporary_table(table_list) across
the codebase.
This commit is contained in:
Alexander Nozdrin
2010-08-31 13:52:56 +04:00
parent a92ca267e0
commit 2e462c8f99
5 changed files with 53 additions and 29 deletions
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68
sql/sql_base.cc
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@@ -247,7 +247,8 @@ static void check_unused(void)
Length of key
*/
uint create_table_def_key(THD *thd, char *key, TABLE_LIST *table_list,
uint create_table_def_key(THD *thd, char *key,
const TABLE_LIST *table_list,
bool tmp_table)
{
uint key_length= (uint) (strmov(strmov(key, table_list->db)+1,
@@ -1987,39 +1988,60 @@ void update_non_unique_table_error(TABLE_LIST *update,
}
/**
Find temporary table specified by database and table names in the
THD::temporary_tables list.
@return TABLE instance if a temporary table has been found; NULL otherwise.
*/
TABLE *find_temporary_table(THD *thd, const char *db, const char *table_name)
{
TABLE_LIST table_list;
TABLE_LIST tl;
table_list.db= (char*) db;
table_list.table_name= (char*) table_name;
return find_temporary_table(thd, &table_list);
tl.db= (char*) db;
tl.table_name= (char*) table_name;
return find_temporary_table(thd, &tl);
}
TABLE *find_temporary_table(THD *thd, TABLE_LIST *table_list)
{
char key[MAX_DBKEY_LENGTH];
uint key_length;
TABLE *table;
DBUG_ENTER("find_temporary_table");
DBUG_PRINT("enter", ("table: '%s'.'%s'",
table_list->db, table_list->table_name));
/**
Find a temporary table specified by TABLE_LIST instance in the
THD::temporary_tables list.
key_length= create_table_def_key(thd, key, table_list, 1);
for (table=thd->temporary_tables ; table ; table= table->next)
@return TABLE instance if a temporary table has been found; NULL otherwise.
*/
TABLE *find_temporary_table(THD *thd, const TABLE_LIST *tl)
{
char key[MAX_DBKEY_LENGTH];
uint key_length= create_table_def_key(thd, key, tl, 1);
return find_temporary_table(thd, key, key_length);
}
/**
Find a temporary table specified by a key in the THD::temporary_tables list.
@return TABLE instance if a temporary table has been found; NULL otherwise.
*/
TABLE *find_temporary_table(THD *thd,
const char *table_key,
uint table_key_length)
{
for (TABLE *table= thd->temporary_tables; table; table= table->next)
{
if (table->s->table_cache_key.length == key_length &&
!memcmp(table->s->table_cache_key.str, key, key_length))
if (table->s->table_cache_key.length == table_key_length &&
!memcmp(table->s->table_cache_key.str, table_key, table_key_length))
{
DBUG_PRINT("info",
("Found table. server_id: %u pseudo_thread_id: %lu",
(uint) thd->server_id,
(ulong) thd->variables.pseudo_thread_id));
DBUG_RETURN(table);
return table;
}
}
DBUG_RETURN(0); // Not a temporary table
return NULL;
}