24
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#include "config.h"
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#include "drizzled/session.h"
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#include "drizzled/session/cache.h"
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#include <drizzled/session.h>
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#include "drizzled/session_list.h"
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#include <sys/stat.h>
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#include "drizzled/error.h"
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#include "drizzled/gettext.h"
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#include "drizzled/query_id.h"
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#include "drizzled/data_home.h"
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#include "drizzled/sql_base.h"
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#include "drizzled/lock.h"
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#include "drizzled/item/cache.h"
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#include "drizzled/item/float.h"
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#include "drizzled/item/return_int.h"
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#include "drizzled/item/empty_string.h"
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#include "drizzled/show.h"
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#include "drizzled/plugin/client.h"
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#include <drizzled/error.h>
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#include <drizzled/gettext.h>
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#include <drizzled/query_id.h>
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#include <drizzled/data_home.h>
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#include <drizzled/sql_base.h>
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#include <drizzled/lock.h>
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#include <drizzled/item/cache.h>
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#include <drizzled/item/float.h>
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#include <drizzled/item/return_int.h>
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#include <drizzled/item/empty_string.h>
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#include <drizzled/show.h>
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#include <drizzled/plugin/client.h>
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#include "drizzled/plugin/scheduler.h"
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#include "drizzled/plugin/authentication.h"
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#include "drizzled/plugin/logging.h"
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#include "drizzled/plugin/transactional_storage_engine.h"
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#include "drizzled/plugin/query_rewrite.h"
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#include "drizzled/probes.h"
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#include "drizzled/table_proto.h"
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#include "drizzled/db.h"
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#include "drizzled/transaction_services.h"
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#include "drizzled/drizzled.h"
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#include "drizzled/table/instance.h"
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#include "drizzled/table_share_instance.h"
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#include "plugin/myisam/myisam.h"
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#include "drizzled/internal/iocache.h"
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#include "drizzled/internal/thread_var.h"
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#include "drizzled/plugin/event_observer.h"
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#include "drizzled/util/functors.h"
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#include "drizzled/display.h"
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#include <algorithm>
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#include <boost/filesystem.hpp>
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#include "drizzled/util/backtrace.h"
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using namespace std;
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namespace fs=boost::filesystem;
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char empty_c_string[1]= {0}; /* used for not defined db */
83
72
const char * const Session::DEFAULT_WHERE= "field list";
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extern pthread_key_t THR_Session;
74
extern pthread_key_t THR_Mem_root;
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/****************************************************************************
79
****************************************************************************/
80
static unsigned char *get_var_key(user_var_entry *entry, size_t *length, bool)
82
*length= entry->name.length;
83
return (unsigned char*) entry->name.str;
86
static void free_user_var(user_var_entry *entry)
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91
bool Key_part_spec::operator==(const Key_part_spec& other) const
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return length == other.length &&
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field_name.length == other.field_name.length &&
89
!my_strcasecmp(system_charset_info, field_name.str, other.field_name.str);
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!strcmp(field_name.str, other.field_name.str);
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Open_tables_state::Open_tables_state(uint64_t version_arg) :
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160
return (int) session->lex->sql_command;
157
enum_tx_isolation session_tx_isolation(const Session *session)
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int session_tx_isolation(const Session *session)
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return (enum_tx_isolation)session->variables.tx_isolation;
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return (int) session->variables.tx_isolation;
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168
Session::Session(plugin::Client *client_arg) :
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Open_tables_state(refresh_version),
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mem_root(&main_mem_root),
167
query(new std::string),
168
_schema(new std::string("")),
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client(client_arg),
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scheduler_arg(NULL),
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lock_id(&main_lock_id),
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ha_data(plugin::num_trx_monitored_objects),
176
concurrent_execute_allowed(true),
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arg_of_last_insert_id_function(false),
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first_successful_insert_id_in_prev_stmt(0),
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181
first_successful_insert_id_in_cur_stmt(0),
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limit_found_rows(0),
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_global_read_lock(NONE),
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some_tables_deleted(false),
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no_errors(false),
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/* Initialize sub structures */
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memory::init_sql_alloc(&warn_root, WARN_ALLOC_BLOCK_SIZE, WARN_ALLOC_PREALLOC_SIZE);
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hash_init(&user_vars, system_charset_info, USER_VARS_HASH_SIZE, 0, 0,
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(hash_get_key) get_var_key,
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(hash_free_key) free_user_var, 0);
264
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substitute_null_with_insert_id = false;
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lock_info.init(); /* safety: will be reset after start */
267
thr_lock_info_init(&lock_info); /* safety: will be reset after start */
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thr_lock_owner_init(&main_lock_id, &lock_info);
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m_internal_handler= NULL;
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return false; // 'false', as per coding style
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void Session::setAbort(bool arg)
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mysys_var->abort= arg;
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void Session::lockOnSys()
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boost_unique_lock_t scopedLock(mysys_var->mutex);
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if (mysys_var->current_cond)
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mysys_var->current_mutex->lock();
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mysys_var->current_cond->notify_all();
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mysys_var->current_mutex->unlock();
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307
void Session::pop_internal_handler()
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assert(m_internal_handler != NULL);
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dbug_sentry= Session_SENTRY_GONE;
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main_mem_root.free_root(MYF(0));
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currentMemRoot().release();
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currentSession().release();
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pthread_setspecific(THR_Session, 0);
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plugin::Logging::postEndDo(this);
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plugin::EventObserver::deregisterSessionEvents(*this);
410
for (PropertyMap::iterator iter= life_properties.begin(); iter != life_properties.end(); iter++)
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delete (*iter).second;
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life_properties.clear();
417
void Session::setClient(plugin::Client *client_arg)
420
client->setSession(this);
423
void Session::awake(Session::killed_state_t state_to_set)
425
if ((state_to_set == Session::KILL_QUERY) and (command == COM_SLEEP))
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/* Ensure that no one is using Session */
380
pthread_mutex_unlock(&LOCK_delete);
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pthread_mutex_destroy(&LOCK_delete);
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void Session::awake(Session::killed_state state_to_set)
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this->checkSentry();
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setKilled(state_to_set);
431
scheduler->killSession(this);
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safe_mutex_assert_owner(&LOCK_delete);
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killed= state_to_set;
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if (state_to_set != Session::KILL_QUERY)
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scheduler->killSession(this);
435
393
DRIZZLE_CONNECTION_DONE(thread_id);
440
boost_unique_lock_t scopedLock(mysys_var->mutex);
397
pthread_mutex_lock(&mysys_var->mutex);
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399
This broadcast could be up in the air if the victim thread
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exits the cond in the time between read and broadcast, but that is
445
401
ok since all we want to do is to make the victim thread get out
568
521
current_global_counters.max_used_connections= connection_count;
571
current_global_counters.connections++;
572
arg->thread_id= arg->variables.pseudo_thread_id= global_thread_id++;
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session::Cache::singleton().insert(arg);
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if (unlikely(plugin::EventObserver::connectSession(*arg)))
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// We should do something about an error...
581
if (plugin::Scheduler::getScheduler()->addSession(arg))
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DRIZZLE_CONNECTION_START(arg->getSessionId());
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thread_id= variables.pseudo_thread_id= global_thread_id++;
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pthread_mutex_lock(&LOCK_thread_count);
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getSessionList().push_back(this);
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pthread_mutex_unlock(&LOCK_thread_count);
530
if (scheduler->addSession(this))
532
DRIZZLE_CONNECTION_START(thread_id);
584
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char error_message_buff[DRIZZLE_ERRMSG_SIZE];
586
arg->setKilled(Session::KILL_CONNECTION);
535
killed= Session::KILL_CONNECTION;
588
arg->status_var.aborted_connects++;
537
status_var_increment(current_global_counters.aborted_connects);
590
539
/* Can't use my_error() since store_globals has not been called. */
591
540
/* TODO replace will better error message */
592
541
snprintf(error_message_buff, sizeof(error_message_buff),
593
542
ER(ER_CANT_CREATE_THREAD), 1);
594
arg->client->sendError(ER_CANT_CREATE_THREAD, error_message_buff);
543
client->sendError(ER_CANT_CREATE_THREAD, error_message_buff);
604
Is this session viewable by the current user?
606
bool Session::isViewable() const
608
return plugin::Authorization::isAuthorized(current_session->getSecurityContext(),
614
const char* Session::enter_cond(boost::condition_variable_any &cond, boost::mutex &mutex, const char* msg)
551
const char* Session::enter_cond(pthread_cond_t *cond,
552
pthread_mutex_t* mutex,
616
555
const char* old_msg = get_proc_info();
617
556
safe_mutex_assert_owner(mutex);
618
mysys_var->current_mutex = &mutex;
619
mysys_var->current_cond = &cond;
557
mysys_var->current_mutex = mutex;
558
mysys_var->current_cond = cond;
620
559
this->set_proc_info(msg);
629
568
locked (if that would not be the case, you'll get a deadlock if someone
630
569
does a Session::awake() on you).
632
mysys_var->current_mutex->unlock();
633
boost_unique_lock_t scopedLock(mysys_var->mutex);
571
pthread_mutex_unlock(mysys_var->current_mutex);
572
pthread_mutex_lock(&mysys_var->mutex);
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mysys_var->current_mutex = 0;
635
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mysys_var->current_cond = 0;
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this->set_proc_info(old_msg);
576
pthread_mutex_unlock(&mysys_var->mutex);
639
579
bool Session::authenticate()
642
582
if (client->authenticate())
645
status_var.aborted_connects++;
585
status_var_increment(current_global_counters.aborted_connects);
650
bool Session::checkUser(const std::string &passwd_str,
651
const std::string &in_db)
589
bool Session::checkUser(const char *passwd, uint32_t passwd_len, const char *in_db)
591
const string passwd_str(passwd, passwd_len);
653
592
bool is_authenticated=
654
593
plugin::Authentication::isAuthenticated(getSecurityContext(),
657
596
if (is_authenticated != true)
659
status_var.access_denied++;
660
598
/* isAuthenticated has pushed the error message */
664
602
/* Change database if necessary */
665
if (not in_db.empty())
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if (in_db && in_db[0])
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605
SchemaIdentifier identifier(in_db);
668
606
if (mysql_change_db(this, identifier))
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632
main_da.reset_diagnostics_area();
696
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if (client->readCommand(&l_packet, &packet_length) == false)
701
if (getKilled() == KILL_CONNECTION)
704
637
if (packet_length == 0)
707
l_command= static_cast<enum_server_command>(l_packet[0]);
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l_command= (enum enum_server_command) (unsigned char) l_packet[0];
709
642
if (command >= COM_END)
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command= COM_END; // Wrong command
712
645
assert(packet_length);
713
return not dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
646
return ! dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
716
649
bool Session::readAndStoreQuery(const char *in_packet, uint32_t in_packet_length)
722
655
in_packet_length--;
724
657
const char *pos= in_packet + in_packet_length; /* Point at end null */
725
while (in_packet_length > 0 && (pos[-1] == ';' || my_isspace(charset() ,pos[-1])))
658
while (in_packet_length > 0 &&
659
(pos[-1] == ';' || my_isspace(charset() ,pos[-1])))
728
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in_packet_length--;
731
std::string *new_query= new std::string(in_packet, in_packet + in_packet_length);
732
// We can not be entirely sure _schema has a value
735
plugin::QueryRewriter::rewriteQuery(*_schema, *new_query);
737
query.reset(new_query);
738
_state.reset(new State(in_packet, in_packet_length));
665
query.assign(in_packet, in_packet + in_packet_length);
1038
static int create_file(Session *session,
1039
fs::path &target_path,
1040
file_exchange *exchange,
1041
internal::IO_CACHE *cache)
963
static int create_file(Session *session, char *path, file_exchange *exchange, internal::IO_CACHE *cache)
1043
fs::path to_file(exchange->file_name);
1046
if (not to_file.has_root_directory())
966
uint32_t option= MY_UNPACK_FILENAME | MY_RELATIVE_PATH;
968
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
969
option|= MY_REPLACE_DIR; // Force use of db directory
972
if (!internal::dirname_length(exchange->file_name))
1048
target_path= fs::system_complete(getDataHomeCatalog());
1049
util::string::const_shared_ptr schema(session->schema());
1050
if (schema and not schema->empty())
1052
int count_elements= 0;
1053
for (fs::path::iterator iter= to_file.begin();
1054
iter != to_file.end();
1055
++iter, ++count_elements)
1058
if (count_elements == 1)
1060
target_path /= *schema;
1063
target_path /= to_file;
974
strcpy(path, data_home_real);
975
if (! session->db.empty())
976
strncat(path, session->db.c_str(), FN_REFLEN-strlen(data_home_real)-1);
977
(void) internal::fn_format(path, exchange->file_name, path, "", option);
1067
target_path = exchange->file_name;
1070
if (not secure_file_priv.string().empty())
1072
if (target_path.file_string().substr(0, secure_file_priv.file_string().size()) != secure_file_priv.file_string())
1074
/* Write only allowed to dir or subdir specified by secure_file_priv */
1075
my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--secure-file-priv");
1080
if (!access(target_path.file_string().c_str(), F_OK))
980
(void) internal::fn_format(path, exchange->file_name, data_home_real, "", option);
982
if (opt_secure_file_priv &&
983
strncmp(opt_secure_file_priv, path, strlen(opt_secure_file_priv)))
985
/* Write only allowed to dir or subdir specified by secure_file_priv */
986
my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--secure-file-priv");
990
if (!access(path, F_OK))
1082
992
my_error(ER_FILE_EXISTS_ERROR, MYF(0), exchange->file_name);
1085
995
/* Create the file world readable */
1086
if ((file= internal::my_create(target_path.file_string().c_str(), 0666, O_WRONLY|O_EXCL, MYF(MY_WME))) < 0)
996
if ((file= internal::my_create(path, 0666, O_WRONLY|O_EXCL, MYF(MY_WME))) < 0)
1088
998
(void) fchmod(file, 0666); // Because of umask()
1089
if (cache->init_io_cache(file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
999
if (init_io_cache(cache, file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
1091
1001
internal::my_close(file, MYF(0));
1092
internal::my_delete(target_path.file_string().c_str(), MYF(0)); // Delete file on error, it was just created
1002
internal::my_delete(path, MYF(0)); // Delete file on error, it was just created
1319
1225
for (; length > sizeof(space) ; length-=sizeof(space))
1321
1227
if (my_b_write(cache,(unsigned char*) space,sizeof(space)))
1324
1230
if (my_b_write(cache,(unsigned char*) space,length))
1328
1234
if (res && enclosed)
1330
1236
if (my_b_write(cache, (unsigned char*) exchange->enclosed->ptr(),
1331
1237
exchange->enclosed->length()))
1334
1240
if (--items_left)
1336
1242
if (my_b_write(cache, (unsigned char*) exchange->field_term->ptr(),
1337
1243
field_term_length))
1341
1247
if (my_b_write(cache,(unsigned char*) exchange->line_term->ptr(),
1342
1248
exchange->line_term->length()))
1451
1358
switch (val_item->result_type())
1453
1360
case REAL_RESULT:
1454
op= &select_max_min_finder_subselect::cmp_real;
1361
op= &select_max_min_finder_subselect::cmp_real;
1456
1363
case INT_RESULT:
1457
op= &select_max_min_finder_subselect::cmp_int;
1364
op= &select_max_min_finder_subselect::cmp_int;
1459
1366
case STRING_RESULT:
1460
op= &select_max_min_finder_subselect::cmp_str;
1367
op= &select_max_min_finder_subselect::cmp_str;
1462
1369
case DECIMAL_RESULT:
1463
1370
op= &select_max_min_finder_subselect::cmp_decimal;
1465
1372
case ROW_RESULT:
1466
1373
// This case should never be choosen
1471
1378
cache->store(val_item);
1554
1461
void Session::end_statement()
1556
1463
/* Cleanup SQL processing state to reuse this statement in next query. */
1558
query_cache_key= ""; // reset the cache key
1559
resetResultsetMessage();
1562
1467
bool Session::copy_db_to(char **p_db, size_t *p_db_length)
1565
if (_schema and _schema->empty())
1567
my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
1570
else if (not _schema)
1572
my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
1577
*p_db= strmake(_schema->c_str(), _schema->size());
1578
*p_db_length= _schema->size();
1471
my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
1474
*p_db= strmake(db.c_str(), db.length());
1475
*p_db_length= db.length();
1619
void Session::set_db(const std::string &new_db)
1515
bool Session::set_db(const std::string &new_db)
1621
1517
/* Do not reallocate memory if current chunk is big enough. */
1622
1518
if (new_db.length())
1624
_schema.reset(new std::string(new_db));
1628
_schema.reset(new std::string(""));
1530
Check the killed state of a user thread
1531
@param session user thread
1532
@retval 0 the user thread is active
1533
@retval 1 the user thread has been killed
1535
int session_killed(const Session *session)
1537
return(session->killed);
1541
const struct charset_info_st *session_charset(Session *session)
1543
return(session->charset());
1634
1547
Mark transaction to rollback and mark error as fatal to a sub-statement.
1651
1564
plugin_sessionvar_cleanup(this);
1653
1566
/* If necessary, log any aborted or unauthorized connections */
1654
if (getKilled() || client->wasAborted())
1567
if (killed || client->wasAborted())
1656
status_var.aborted_threads++;
1569
status_var_increment(current_global_counters.aborted_threads);
1659
1572
if (client->wasAborted())
1661
if (not getKilled() && variables.log_warnings > 1)
1574
if (! killed && variables.log_warnings > 1)
1663
1576
SecurityContext *sctx= &security_ctx;
1665
1578
errmsg_printf(ERRMSG_LVL_WARN, ER(ER_NEW_ABORTING_CONNECTION)
1667
, (_schema->empty() ? "unconnected" : _schema->c_str())
1580
, (db.empty() ? "unconnected" : db.c_str())
1668
1581
, sctx->getUser().empty() == false ? sctx->getUser().c_str() : "unauthenticated"
1669
1582
, sctx->getIp().c_str()
1670
1583
, (main_da.is_error() ? main_da.message() : ER(ER_UNKNOWN_ERROR)));
1774
1682
If this is needed, use close_temporary_table()
1777
void Open_tables_state::nukeTable(Table *table)
1685
void Session::nukeTable(Table *table)
1779
1687
plugin::StorageEngine *table_type= table->getShare()->db_type();
1781
1689
table->free_io_cache();
1782
table->delete_table();
1690
table->delete_table(false);
1784
1692
TableIdentifier identifier(table->getShare()->getSchemaName(), table->getShare()->getTableName(), table->getShare()->getPath());
1785
1693
rm_temporary_table(table_type, identifier);
1796
1704
void Session::refresh_status()
1706
pthread_mutex_lock(&LOCK_status);
1798
1708
/* Reset thread's status variables */
1799
1709
memset(&status_var, 0, sizeof(status_var));
1711
/* Reset the counters of all key caches (default and named). */
1712
reset_key_cache_counters();
1801
1713
flush_status_time= time((time_t*) 0);
1802
1714
current_global_counters.max_used_connections= 1; /* We set it to one, because we know we exist */
1803
current_global_counters.connections= 0;
1715
pthread_mutex_unlock(&LOCK_status);
1806
1718
user_var_entry *Session::getVariable(LEX_STRING &name, bool create_if_not_exists)
1808
return getVariable(std::string(name.str, name.length), create_if_not_exists);
1811
user_var_entry *Session::getVariable(const std::string &name, bool create_if_not_exists)
1813
UserVarsRange ppp= user_vars.equal_range(name);
1815
for (UserVars::iterator iter= ppp.first;
1816
iter != ppp.second; ++iter)
1818
return (*iter).second;
1821
if (not create_if_not_exists)
1824
1720
user_var_entry *entry= NULL;
1825
entry= new (nothrow) user_var_entry(name.c_str(), query_id);
1830
std::pair<UserVars::iterator, bool> returnable= user_vars.insert(make_pair(name, entry));
1832
if (not returnable.second)
1722
entry= (user_var_entry*) hash_search(&user_vars, (unsigned char*) name.str, name.length);
1724
if ((entry == NULL) && create_if_not_exists)
1726
if (!hash_inited(&user_vars))
1728
entry= new (nothrow) user_var_entry(name.str, query_id);
1733
if (my_hash_insert(&user_vars, (unsigned char*) entry))
1840
void Session::setVariable(const std::string &name, const std::string &value)
1842
user_var_entry *updateable_var= getVariable(name.c_str(), true);
1844
updateable_var->update_hash(false,
1845
(void*)value.c_str(),
1846
static_cast<uint32_t>(value.length()), STRING_RESULT,
1848
DERIVATION_IMPLICIT, false);
1851
void Open_tables_state::mark_temp_tables_as_free_for_reuse()
1745
void Session::mark_temp_tables_as_free_for_reuse()
1853
1747
for (Table *table= temporary_tables ; table ; table= table->getNext())
1855
if (table->query_id == getQueryId())
1749
if (table->query_id == query_id)
1857
1751
table->query_id= 0;
1858
1752
table->cursor->ha_reset();
1916
1811
handled either before writing a query log event (inside
1917
1812
binlog_query()) or when preparing a pending event.
1814
mysql_unlock_tables(this, lock);
1923
Note that we need to hold table::Cache::singleton().mutex() while changing the
1818
Note that we need to hold LOCK_open while changing the
1924
1819
open_tables list. Another thread may work on it.
1925
(See: table::Cache::singleton().removeTable(), mysql_wait_completed_table())
1820
(See: remove_table_from_cache(), mysql_wait_completed_table())
1926
1821
Closing a MERGE child before the parent would be fatal if the
1927
1822
other thread tries to abort the MERGE lock in between.
1961
1856
close_tables_for_reopen(&tables);
1963
1858
if ((mysql_handle_derived(lex, &mysql_derived_prepare) ||
1859
(fill_derived_tables() &&
1965
1860
mysql_handle_derived(lex, &mysql_derived_filling))))
1866
bool Session::openTables(TableList *tables, uint32_t flags)
1869
bool ret= fill_derived_tables();
1870
assert(ret == false);
1871
if (open_tables_from_list(&tables, &counter, flags) ||
1872
mysql_handle_derived(lex, &mysql_derived_prepare))
1972
1880
@note "best_effort" is used in cases were if a failure occurred on this
1973
1881
operation it would not be surprising because we are only removing because there
1974
1882
might be an issue (lame engines).
1977
bool Open_tables_state::rm_temporary_table(const TableIdentifier &identifier, bool best_effort)
1885
bool Session::rm_temporary_table(TableIdentifier &identifier, bool best_effort)
1979
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), identifier))
1887
if (plugin::StorageEngine::dropTable(*this, identifier))
1981
1889
if (not best_effort)
1984
identifier.getSQLPath(path);
1985
1891
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
1986
path.c_str(), errno);
1892
identifier.getSQLPath().c_str(), errno);
1995
bool Open_tables_state::rm_temporary_table(plugin::StorageEngine *base, const TableIdentifier &identifier)
1901
bool Session::rm_temporary_table(plugin::StorageEngine *base, TableIdentifier &identifier)
1999
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), *base, identifier))
1905
if (plugin::StorageEngine::dropTable(*this, *base, identifier))
2002
identifier.getSQLPath(path);
2003
1907
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
2004
path.c_str(), errno);
1908
identifier.getSQLPath().c_str(), errno);
2037
1941
cerr << "\t\t Proto " << proto->schema() << " " << proto->name() << "\n";
2041
1944
cerr << "\tTabl;e Name " << table->getShare()->getSchemaName() << "." << table->getShare()->getTableName() << " : " << answer << "\n";
2046
bool Session::TableMessages::storeTableMessage(const TableIdentifier &identifier, message::Table &table_message)
1948
bool Session::storeTableMessage(TableIdentifier &identifier, message::Table &table_message)
2048
1950
table_message_cache.insert(make_pair(identifier.getPath(), table_message));
2053
bool Session::TableMessages::removeTableMessage(const TableIdentifier &identifier)
1955
bool Session::removeTableMessage(TableIdentifier &identifier)
2055
1957
TableMessageCache::iterator iter;
2114
table::Instance *Session::getInstanceTable()
2116
temporary_shares.push_back(new table::Instance()); // This will not go into the tableshare cache, so no key is used.
2118
table::Instance *tmp_share= temporary_shares.back();
2127
Create a reduced Table object with properly set up Field list from a
2128
list of field definitions.
2130
The created table doesn't have a table Cursor associated with
2131
it, has no keys, no group/distinct, no copy_funcs array.
2132
The sole purpose of this Table object is to use the power of Field
2133
class to read/write data to/from table->getInsertRecord(). Then one can store
2134
the record in any container (RB tree, hash, etc).
2135
The table is created in Session mem_root, so are the table's fields.
2136
Consequently, if you don't BLOB fields, you don't need to free it.
2138
@param session connection handle
2139
@param field_list list of column definitions
2142
0 if out of memory, Table object in case of success
2144
table::Instance *Session::getInstanceTable(List<CreateField> &field_list)
2146
temporary_shares.push_back(new table::Instance(this, field_list)); // This will not go into the tableshare cache, so no key is used.
2148
table::Instance *tmp_share= temporary_shares.back();
2157
static const std::string NONE= "NONE";
2158
static const std::string GOT_GLOBAL_READ_LOCK= "HAS GLOBAL READ LOCK";
2159
static const std::string MADE_GLOBAL_READ_LOCK_BLOCK_COMMIT= "HAS GLOBAL READ LOCK WITH BLOCKING COMMIT";
2161
const std::string &type(drizzled::Session::global_read_lock_t type)
2167
case Session::GOT_GLOBAL_READ_LOCK:
2168
return GOT_GLOBAL_READ_LOCK;
2169
case Session::MADE_GLOBAL_READ_LOCK_BLOCK_COMMIT:
2170
return MADE_GLOBAL_READ_LOCK_BLOCK_COMMIT;
2174
size_t max_string_length(drizzled::Session::global_read_lock_t)
2176
return MADE_GLOBAL_READ_LOCK_BLOCK_COMMIT.size();
2179
} /* namespace display */
2016
TableShareInstance *Session::getTemporaryShare(TableIdentifier::Type type_arg)
2018
temporary_shares.push_back(new TableShareInstance(type_arg)); // This will not go into the tableshare cache, so no key is used.
2020
TableShareInstance *tmp_share= temporary_shares.back();
2181
2027
} /* namespace drizzled */