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new lock for multiupdate:

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- open and create derived tables
- detect which tables should be locked for write
- lock and fill derived tables
some unitialized variables fixed
This commit is contained in:
bell@sanja.is.com.ua
2004-11-05 17:29:47 +02:00
parent b2dd380beb
commit 064b02203f
15 changed files with 216 additions and 155 deletions
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13
sql/sql_base.cc
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@ -44,6 +44,7 @@ static my_bool open_new_frm(const char *path, const char *alias,
uint db_stat, uint prgflag,
uint ha_open_flags, TABLE *outparam,
TABLE_LIST *table_desc, MEM_ROOT *mem_root);
static void relink_tables_for_multidelete(THD *thd);
extern "C" byte *table_cache_key(const byte *record,uint *length,
my_bool not_used __attribute__((unused)))
@ -1857,21 +1858,23 @@ int open_and_lock_tables(THD *thd, TABLE_LIST *tables)
{
DBUG_ENTER("open_and_lock_tables");
uint counter;
if (open_tables(thd, tables, &counter) ||
if (open_tables(thd, tables, &counter) ||
lock_tables(thd, tables, counter) ||
mysql_handle_derived(thd->lex))
mysql_handle_derived(thd->lex, &mysql_derived_prepare) ||
(thd->fill_derived_tables() &&
mysql_handle_derived(thd->lex, &mysql_derived_filling)))
DBUG_RETURN(thd->net.report_error ? -1 : 1); /* purecov: inspected */
relink_tables_for_derived(thd);
relink_tables_for_multidelete(thd);
DBUG_RETURN(0);
}
/*
Let us propagate pointers to open tables from global table list
to table lists in particular selects if needed.
to table lists for multi-delete
*/
void relink_tables_for_derived(THD *thd)
static void relink_tables_for_multidelete(THD *thd)
{
if (thd->lex->all_selects_list->next_select_in_list() ||
thd->lex->time_zone_tables_used)