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 */
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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)
85
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 &&
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!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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return (int) session->lex->sql_command;
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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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Session::Session(plugin::Client *client_arg) :
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Open_tables_state(refresh_version),
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mem_root(&main_mem_root),
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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),
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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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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);
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substitute_null_with_insert_id = false;
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lock_info.init(); /* safety: will be reset after start */
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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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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)
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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 */
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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);
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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);
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393
DRIZZLE_CONNECTION_DONE(thread_id);
440
boost_unique_lock_t scopedLock(mysys_var->mutex);
397
pthread_mutex_lock(&mysys_var->mutex);
443
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++;
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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...
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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);
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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(status_var.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
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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;
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574
mysys_var->current_cond = 0;
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this->set_proc_info(old_msg);
576
pthread_mutex_unlock(&mysys_var->mutex);
639
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bool Session::authenticate()
642
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if (client->authenticate())
645
status_var.aborted_connects++;
585
status_var_increment(status_var.aborted_connects);
650
bool Session::checkUser(const std::string &passwd_str,
651
const std::string &in_db)
590
bool Session::checkUser(const char *passwd, uint32_t passwd_len, const char *in_db)
592
const string passwd_str(passwd, passwd_len);
653
593
bool is_authenticated=
654
594
plugin::Authentication::isAuthenticated(getSecurityContext(),
657
597
if (is_authenticated != true)
659
status_var.access_denied++;
599
status_var_increment(status_var.access_denied);
660
600
/* isAuthenticated has pushed the error message */
664
604
/* Change database if necessary */
665
if (not in_db.empty())
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if (in_db && in_db[0])
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SchemaIdentifier identifier(in_db);
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608
if (mysql_change_db(this, identifier))
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634
main_da.reset_diagnostics_area();
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636
if (client->readCommand(&l_packet, &packet_length) == false)
701
if (getKilled() == KILL_CONNECTION)
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if (packet_length == 0)
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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
644
if (command >= COM_END)
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command= COM_END; // Wrong command
712
647
assert(packet_length);
713
return not dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
648
return ! dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
716
651
bool Session::readAndStoreQuery(const char *in_packet, uint32_t in_packet_length)
722
657
in_packet_length--;
724
659
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])))
660
while (in_packet_length > 0 &&
661
(pos[-1] == ';' || my_isspace(charset() ,pos[-1])))
728
664
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));
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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)
965
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())
968
uint32_t option= MY_UNPACK_FILENAME | MY_RELATIVE_PATH;
970
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
971
option|= MY_REPLACE_DIR; // Force use of db directory
974
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;
976
strcpy(path, data_home_real);
977
if (! session->db.empty())
978
strncat(path, session->db.c_str(), FN_REFLEN-strlen(data_home_real)-1);
979
(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))
982
(void) internal::fn_format(path, exchange->file_name, data_home_real, "", option);
984
if (opt_secure_file_priv &&
985
strncmp(opt_secure_file_priv, path, strlen(opt_secure_file_priv)))
987
/* Write only allowed to dir or subdir specified by secure_file_priv */
988
my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--secure-file-priv");
992
if (!access(path, F_OK))
1082
994
my_error(ER_FILE_EXISTS_ERROR, MYF(0), exchange->file_name);
1085
997
/* 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)
998
if ((file= internal::my_create(path, 0666, O_WRONLY|O_EXCL, MYF(MY_WME))) < 0)
1088
1000
(void) fchmod(file, 0666); // Because of umask()
1089
if (cache->init_io_cache(file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
1001
if (init_io_cache(cache, file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
1091
1003
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
1004
internal::my_delete(path, MYF(0)); // Delete file on error, it was just created
1319
1227
for (; length > sizeof(space) ; length-=sizeof(space))
1321
1229
if (my_b_write(cache,(unsigned char*) space,sizeof(space)))
1324
1232
if (my_b_write(cache,(unsigned char*) space,length))
1328
1236
if (res && enclosed)
1330
1238
if (my_b_write(cache, (unsigned char*) exchange->enclosed->ptr(),
1331
1239
exchange->enclosed->length()))
1334
1242
if (--items_left)
1336
1244
if (my_b_write(cache, (unsigned char*) exchange->field_term->ptr(),
1337
1245
field_term_length))
1341
1249
if (my_b_write(cache,(unsigned char*) exchange->line_term->ptr(),
1342
1250
exchange->line_term->length()))
1451
1360
switch (val_item->result_type())
1453
1362
case REAL_RESULT:
1454
op= &select_max_min_finder_subselect::cmp_real;
1363
op= &select_max_min_finder_subselect::cmp_real;
1456
1365
case INT_RESULT:
1457
op= &select_max_min_finder_subselect::cmp_int;
1366
op= &select_max_min_finder_subselect::cmp_int;
1459
1368
case STRING_RESULT:
1460
op= &select_max_min_finder_subselect::cmp_str;
1369
op= &select_max_min_finder_subselect::cmp_str;
1462
1371
case DECIMAL_RESULT:
1463
1372
op= &select_max_min_finder_subselect::cmp_decimal;
1465
1374
case ROW_RESULT:
1466
1375
// This case should never be choosen
1471
1380
cache->store(val_item);
1554
1463
void Session::end_statement()
1556
1465
/* Cleanup SQL processing state to reuse this statement in next query. */
1558
query_cache_key= ""; // reset the cache key
1559
resetResultsetMessage();
1562
1469
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();
1473
my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
1476
*p_db= strmake(db.c_str(), db.length());
1477
*p_db_length= db.length();
1619
void Session::set_db(const std::string &new_db)
1517
bool Session::set_db(const std::string &new_db)
1621
1519
/* Do not reallocate memory if current chunk is big enough. */
1622
1520
if (new_db.length())
1624
_schema.reset(new std::string(new_db));
1628
_schema.reset(new std::string(""));
1532
Check the killed state of a user thread
1533
@param session user thread
1534
@retval 0 the user thread is active
1535
@retval 1 the user thread has been killed
1537
int session_killed(const Session *session)
1539
return(session->killed);
1543
const struct charset_info_st *session_charset(Session *session)
1545
return(session->charset());
1634
1549
Mark transaction to rollback and mark error as fatal to a sub-statement.
1651
1566
plugin_sessionvar_cleanup(this);
1653
1568
/* If necessary, log any aborted or unauthorized connections */
1654
if (getKilled() || client->wasAborted())
1569
if (killed || client->wasAborted())
1656
status_var.aborted_threads++;
1571
status_var_increment(status_var.aborted_threads);
1659
1574
if (client->wasAborted())
1661
if (not getKilled() && variables.log_warnings > 1)
1576
if (! killed && variables.log_warnings > 1)
1663
1578
SecurityContext *sctx= &security_ctx;
1665
1580
errmsg_printf(ERRMSG_LVL_WARN, ER(ER_NEW_ABORTING_CONNECTION)
1667
, (_schema->empty() ? "unconnected" : _schema->c_str())
1582
, (db.empty() ? "unconnected" : db.c_str())
1668
1583
, sctx->getUser().empty() == false ? sctx->getUser().c_str() : "unauthenticated"
1669
1584
, sctx->getIp().c_str()
1670
1585
, (main_da.is_error() ? main_da.message() : ER(ER_UNKNOWN_ERROR)));
1774
1684
If this is needed, use close_temporary_table()
1777
void Open_tables_state::nukeTable(Table *table)
1687
void Session::nukeTable(Table *table)
1779
1689
plugin::StorageEngine *table_type= table->getShare()->db_type();
1781
1691
table->free_io_cache();
1782
table->delete_table();
1692
table->delete_table(false);
1784
1694
TableIdentifier identifier(table->getShare()->getSchemaName(), table->getShare()->getTableName(), table->getShare()->getPath());
1785
1695
rm_temporary_table(table_type, identifier);
1796
1706
void Session::refresh_status()
1708
pthread_mutex_lock(&LOCK_status);
1798
1710
/* Reset thread's status variables */
1799
1711
memset(&status_var, 0, sizeof(status_var));
1713
/* Reset the counters of all key caches (default and named). */
1714
reset_key_cache_counters();
1801
1715
flush_status_time= time((time_t*) 0);
1802
1716
current_global_counters.max_used_connections= 1; /* We set it to one, because we know we exist */
1803
current_global_counters.connections= 0;
1717
pthread_mutex_unlock(&LOCK_status);
1806
1720
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
1722
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)
1724
entry= (user_var_entry*) hash_search(&user_vars, (unsigned char*) name.str, name.length);
1726
if ((entry == NULL) && create_if_not_exists)
1728
if (!hash_inited(&user_vars))
1730
entry= new (nothrow) user_var_entry(name.str, query_id);
1735
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()
1747
void Session::mark_temp_tables_as_free_for_reuse()
1853
1749
for (Table *table= temporary_tables ; table ; table= table->getNext())
1855
if (table->query_id == getQueryId())
1751
if (table->query_id == query_id)
1857
1753
table->query_id= 0;
1858
1754
table->cursor->ha_reset();
1916
1813
handled either before writing a query log event (inside
1917
1814
binlog_query()) or when preparing a pending event.
1816
mysql_unlock_tables(this, lock);
1923
Note that we need to hold table::Cache::singleton().mutex() while changing the
1820
Note that we need to hold LOCK_open while changing the
1924
1821
open_tables list. Another thread may work on it.
1925
(See: table::Cache::singleton().removeTable(), mysql_wait_completed_table())
1822
(See: remove_table_from_cache(), mysql_wait_completed_table())
1926
1823
Closing a MERGE child before the parent would be fatal if the
1927
1824
other thread tries to abort the MERGE lock in between.
1961
1858
close_tables_for_reopen(&tables);
1963
1860
if ((mysql_handle_derived(lex, &mysql_derived_prepare) ||
1861
(fill_derived_tables() &&
1965
1862
mysql_handle_derived(lex, &mysql_derived_filling))))
1868
bool Session::openTables(TableList *tables, uint32_t flags)
1871
bool ret= fill_derived_tables();
1872
assert(ret == false);
1873
if (open_tables_from_list(&tables, &counter, flags) ||
1874
mysql_handle_derived(lex, &mysql_derived_prepare))
1972
1882
@note "best_effort" is used in cases were if a failure occurred on this
1973
1883
operation it would not be surprising because we are only removing because there
1974
1884
might be an issue (lame engines).
1977
bool Open_tables_state::rm_temporary_table(const TableIdentifier &identifier, bool best_effort)
1887
bool Session::rm_temporary_table(TableIdentifier &identifier, bool best_effort)
1979
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), identifier))
1889
if (plugin::StorageEngine::dropTable(*this, identifier))
1981
1891
if (not best_effort)
1984
identifier.getSQLPath(path);
1985
1893
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
1986
path.c_str(), errno);
1894
identifier.getSQLPath().c_str(), errno);
1995
bool Open_tables_state::rm_temporary_table(plugin::StorageEngine *base, const TableIdentifier &identifier)
1903
bool Session::rm_temporary_table(plugin::StorageEngine *base, TableIdentifier &identifier)
1999
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), *base, identifier))
1907
if (plugin::StorageEngine::dropTable(*this, *base, identifier))
2002
identifier.getSQLPath(path);
2003
1909
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
2004
path.c_str(), errno);
1910
identifier.getSQLPath().c_str(), errno);
2037
1943
cerr << "\t\t Proto " << proto->schema() << " " << proto->name() << "\n";
2041
1946
cerr << "\tTabl;e Name " << table->getShare()->getSchemaName() << "." << table->getShare()->getTableName() << " : " << answer << "\n";
2046
bool Session::TableMessages::storeTableMessage(const TableIdentifier &identifier, message::Table &table_message)
1950
bool Session::storeTableMessage(const TableIdentifier &identifier, message::Table &table_message)
2048
1952
table_message_cache.insert(make_pair(identifier.getPath(), table_message));
2053
bool Session::TableMessages::removeTableMessage(const TableIdentifier &identifier)
1957
bool Session::removeTableMessage(const TableIdentifier &identifier)
2055
1959
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 */
2018
TableShareInstance *Session::getTemporaryShare(TableIdentifier::Type type_arg)
2020
temporary_shares.push_back(new TableShareInstance(type_arg)); // This will not go into the tableshare cache, so no key is used.
2022
TableShareInstance *tmp_share= temporary_shares.back();
2181
2029
} /* namespace drizzled */