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Added isolation levels

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Added SELECT .. FOR UPDATE and SELECT .. IN SHARE MODE
This commit is contained in:
monty@tik.mysql.fi
2001-03-21 01:02:22 +02:00
parent ef75476c67
commit 6f9a73a1ba
22 changed files with 381 additions and 142 deletions
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47
sql/sql_class.cc
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@ -79,50 +79,59 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
insert_id_used(0),in_lock_tables(0),
global_read_lock(0),bootstrap(0)
{
proc_info="login";
where="field list";
host=user=priv_user=db=query=ip=0;
locked=killed=count_cuted_fields=some_tables_deleted=no_errors=password=
query_start_used=0;
query_length=col_access=0;
query_error=0;
#ifdef SIGNAL_WITH_VIO_CLOSE
active_vio = 0;
pthread_mutex_init(&active_vio_lock, NULL);
#endif
server_id = ::server_id;
server_status=SERVER_STATUS_AUTOCOMMIT;
next_insert_id=last_insert_id=0;
open_tables=temporary_tables=0;
tmp_table=0;
lock=locked_tables=0;
used_tables=0;
gemini_spin_retries=0;
cuted_fields=sent_row_count=0L;
options=thd_startup_options;
update_lock_default= low_priority_updates ? TL_WRITE_LOW_PRIORITY : TL_WRITE;
start_time=(time_t) 0;
current_linfo = 0;
slave_thread = 0;
slave_proxy_id = 0;
last_nx_table = last_nx_db = 0;
cond_count=0;
convert_set=0;
mysys_var=0;
net.vio=0;
ull=0;
system_thread=0;
#ifdef __WIN__
real_id = 0;
#endif
#ifdef SIGNAL_WITH_VIO_CLOSE
active_vio = 0;
pthread_mutex_init(&active_vio_lock, NULL);
#endif
/* Variables with default values */
proc_info="login";
where="field list";
server_id = ::server_id;
server_status=SERVER_STATUS_AUTOCOMMIT;
update_lock_default= low_priority_updates ? TL_WRITE_LOW_PRIORITY : TL_WRITE;
options=thd_startup_options;
inactive_timeout=net_wait_timeout;
open_options=ha_open_options;
cond_count=0;
tx_isolation=session_tx_isolation=default_tx_isolation;
command=COM_CONNECT;
set_query_id=1;
default_select_limit= HA_POS_ERROR;
max_join_size= ((::max_join_size != ~ (ulong) 0L) ? ::max_join_size :
HA_POS_ERROR);
convert_set=0;
mysys_var=0;
db_access=NO_ACCESS;
/* Initialize sub structures */
bzero((char*) &mem_root,sizeof(mem_root));
hash_init(&user_vars, USER_VARS_HASH_SIZE, 0, 0,
(hash_get_key) get_var_key,
(void (*)(void*)) free_var,0);
net.vio=0;
ull=0;
system_thread=0;
bzero((char*) &mem_root,sizeof(mem_root));
#ifdef USING_TRANSACTIONS
if (opt_using_transactions)
{
@ -134,10 +143,6 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
transaction.trans_log.end_of_file= max_binlog_cache_size;
}
#endif
#ifdef __WIN__
real_id = 0 ;
#endif
}
THD::~THD()