24
24
#include "config.h"
25
#include "drizzled/session.h"
26
#include "drizzled/session/cache.h"
25
#include <drizzled/session.h>
26
#include "drizzled/session_list.h"
27
27
#include <sys/stat.h>
28
#include "drizzled/error.h"
29
#include "drizzled/gettext.h"
30
#include "drizzled/query_id.h"
31
#include "drizzled/data_home.h"
32
#include "drizzled/sql_base.h"
33
#include "drizzled/lock.h"
34
#include "drizzled/item/cache.h"
35
#include "drizzled/item/float.h"
36
#include "drizzled/item/return_int.h"
37
#include "drizzled/item/empty_string.h"
38
#include "drizzled/show.h"
39
#include "drizzled/plugin/client.h"
28
#include <drizzled/error.h>
29
#include <drizzled/gettext.h>
30
#include <drizzled/query_id.h>
31
#include <drizzled/data_home.h>
32
#include <drizzled/sql_base.h>
33
#include <drizzled/lock.h>
34
#include <drizzled/item/cache.h>
35
#include <drizzled/item/float.h>
36
#include <drizzled/item/return_int.h>
37
#include <drizzled/item/empty_string.h>
38
#include <drizzled/show.h>
39
#include <drizzled/plugin/client.h>
40
40
#include "drizzled/plugin/scheduler.h"
41
41
#include "drizzled/plugin/authentication.h"
42
42
#include "drizzled/plugin/logging.h"
43
43
#include "drizzled/plugin/transactional_storage_engine.h"
44
#include "drizzled/plugin/query_rewrite.h"
45
44
#include "drizzled/probes.h"
46
45
#include "drizzled/table_proto.h"
47
46
#include "drizzled/db.h"
49
48
#include "drizzled/transaction_services.h"
50
49
#include "drizzled/drizzled.h"
52
#include "drizzled/table/instance.h"
51
#include "drizzled/table_share_instance.h"
54
53
#include "plugin/myisam/myisam.h"
55
54
#include "drizzled/internal/iocache.h"
56
55
#include "drizzled/internal/thread_var.h"
57
56
#include "drizzled/plugin/event_observer.h"
59
#include "drizzled/util/functors.h"
61
#include "drizzled/display.h"
64
59
#include <algorithm>
66
#include <boost/filesystem.hpp>
68
#include "drizzled/util/backtrace.h"
70
62
using namespace std;
72
namespace fs=boost::filesystem;
162
152
Session::Session(plugin::Client *client_arg) :
163
153
Open_tables_state(refresh_version),
164
154
mem_root(&main_mem_root),
167
query(new std::string),
168
_schema(new std::string("")),
170
157
client(client_arg),
172
159
scheduler_arg(NULL),
173
160
lock_id(&main_lock_id),
175
162
ha_data(plugin::num_trx_monitored_objects),
176
concurrent_execute_allowed(true),
177
163
arg_of_last_insert_id_function(false),
178
164
first_successful_insert_id_in_prev_stmt(0),
179
165
first_successful_insert_id_in_cur_stmt(0),
180
166
limit_found_rows(0),
181
_global_read_lock(NONE),
183
168
some_tables_deleted(false),
184
169
no_errors(false),
407
391
plugin::Logging::postEndDo(this);
408
392
plugin::EventObserver::deregisterSessionEvents(*this);
410
for (PropertyMap::iterator iter= life_properties.begin(); iter != life_properties.end(); iter++)
412
delete (*iter).second;
414
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))
394
/* Ensure that no one is using Session */
395
LOCK_delete.unlock();
398
void Session::awake(Session::killed_state state_to_set)
428
400
this->checkSentry();
430
setKilled(state_to_set);
431
scheduler->killSession(this);
401
safe_mutex_assert_owner(&LOCK_delete);
403
killed= state_to_set;
433
404
if (state_to_set != Session::KILL_QUERY)
406
scheduler->killSession(this);
435
407
DRIZZLE_CONNECTION_DONE(thread_id);
440
boost_unique_lock_t scopedLock(mysys_var->mutex);
411
boost::mutex::scoped_lock scopedLock(mysys_var->mutex);
443
414
This broadcast could be up in the air if the victim thread
571
540
current_global_counters.connections++;
572
arg->thread_id= arg->variables.pseudo_thread_id= global_thread_id++;
574
session::Cache::singleton().insert(arg);
576
if (unlikely(plugin::EventObserver::connectSession(*arg)))
578
// We should do something about an error...
581
if (plugin::Scheduler::getScheduler()->addSession(arg))
583
DRIZZLE_CONNECTION_START(arg->getSessionId());
541
thread_id= variables.pseudo_thread_id= global_thread_id++;
543
LOCK_thread_count.lock();
544
getSessionList().push_back(this);
545
LOCK_thread_count.unlock();
547
if (scheduler->addSession(this))
549
DRIZZLE_CONNECTION_START(thread_id);
584
550
char error_message_buff[DRIZZLE_ERRMSG_SIZE];
586
arg->setKilled(Session::KILL_CONNECTION);
552
killed= Session::KILL_CONNECTION;
588
arg->status_var.aborted_connects++;
554
status_var.aborted_connects++;
590
556
/* Can't use my_error() since store_globals has not been called. */
591
557
/* TODO replace will better error message */
592
558
snprintf(error_message_buff, sizeof(error_message_buff),
593
559
ER(ER_CANT_CREATE_THREAD), 1);
594
arg->client->sendError(ER_CANT_CREATE_THREAD, error_message_buff);
560
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)
568
const char* Session::enter_cond(boost::condition_variable &cond, boost::mutex &mutex, const char* msg)
616
570
const char* old_msg = get_proc_info();
617
571
safe_mutex_assert_owner(mutex);
694
648
main_da.reset_diagnostics_area();
696
650
if (client->readCommand(&l_packet, &packet_length) == false)
701
if (getKilled() == KILL_CONNECTION)
653
if (killed == KILL_CONNECTION)
704
656
if (packet_length == 0)
707
l_command= static_cast<enum_server_command>(l_packet[0]);
659
l_command= (enum enum_server_command) (unsigned char) l_packet[0];
709
661
if (command >= COM_END)
710
662
command= COM_END; // Wrong command
712
664
assert(packet_length);
713
return not dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
665
return ! dispatch_command(l_command, this, l_packet+1, (uint32_t) (packet_length-1));
716
668
bool Session::readAndStoreQuery(const char *in_packet, uint32_t in_packet_length)
722
674
in_packet_length--;
724
676
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])))
677
while (in_packet_length > 0 &&
678
(pos[-1] == ';' || my_isspace(charset() ,pos[-1])))
728
681
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));
684
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)
982
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())
985
uint32_t option= MY_UNPACK_FILENAME | MY_RELATIVE_PATH;
987
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
988
option|= MY_REPLACE_DIR; // Force use of db directory
991
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;
993
strcpy(path, data_home_real);
994
if (! session->db.empty())
995
strncat(path, session->db.c_str(), FN_REFLEN-strlen(data_home_real)-1);
996
(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))
999
(void) internal::fn_format(path, exchange->file_name, data_home_real, "", option);
1001
if (opt_secure_file_priv &&
1002
strncmp(opt_secure_file_priv, path, strlen(opt_secure_file_priv)))
1004
/* Write only allowed to dir or subdir specified by secure_file_priv */
1005
my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--secure-file-priv");
1009
if (!access(path, F_OK))
1082
1011
my_error(ER_FILE_EXISTS_ERROR, MYF(0), exchange->file_name);
1085
1014
/* 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)
1015
if ((file= internal::my_create(path, 0666, O_WRONLY|O_EXCL, MYF(MY_WME))) < 0)
1088
1017
(void) fchmod(file, 0666); // Because of umask()
1089
if (cache->init_io_cache(file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
1018
if (init_io_cache(cache, file, 0L, internal::WRITE_CACHE, 0L, 1, MYF(MY_WME)))
1091
1020
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
1021
internal::my_delete(path, MYF(0)); // Delete file on error, it was just created
1319
1244
for (; length > sizeof(space) ; length-=sizeof(space))
1321
1246
if (my_b_write(cache,(unsigned char*) space,sizeof(space)))
1324
1249
if (my_b_write(cache,(unsigned char*) space,length))
1328
1253
if (res && enclosed)
1330
1255
if (my_b_write(cache, (unsigned char*) exchange->enclosed->ptr(),
1331
1256
exchange->enclosed->length()))
1334
1259
if (--items_left)
1336
1261
if (my_b_write(cache, (unsigned char*) exchange->field_term->ptr(),
1337
1262
field_term_length))
1341
1266
if (my_b_write(cache,(unsigned char*) exchange->line_term->ptr(),
1342
1267
exchange->line_term->length()))
1451
1377
switch (val_item->result_type())
1453
1379
case REAL_RESULT:
1454
op= &select_max_min_finder_subselect::cmp_real;
1380
op= &select_max_min_finder_subselect::cmp_real;
1456
1382
case INT_RESULT:
1457
op= &select_max_min_finder_subselect::cmp_int;
1383
op= &select_max_min_finder_subselect::cmp_int;
1459
1385
case STRING_RESULT:
1460
op= &select_max_min_finder_subselect::cmp_str;
1386
op= &select_max_min_finder_subselect::cmp_str;
1462
1388
case DECIMAL_RESULT:
1463
1389
op= &select_max_min_finder_subselect::cmp_decimal;
1465
1391
case ROW_RESULT:
1466
1392
// This case should never be choosen
1471
1397
cache->store(val_item);
1554
1480
void Session::end_statement()
1556
1482
/* Cleanup SQL processing state to reuse this statement in next query. */
1558
1484
query_cache_key= ""; // reset the cache key
1559
1485
resetResultsetMessage();
1562
1488
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();
1492
my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
1495
*p_db= strmake(db.c_str(), db.length());
1496
*p_db_length= db.length();
1619
void Session::set_db(const std::string &new_db)
1536
bool Session::set_db(const std::string &new_db)
1621
1538
/* Do not reallocate memory if current chunk is big enough. */
1622
1539
if (new_db.length())
1624
_schema.reset(new std::string(new_db));
1628
_schema.reset(new std::string(""));
1551
Check the killed state of a user thread
1552
@param session user thread
1553
@retval 0 the user thread is active
1554
@retval 1 the user thread has been killed
1556
int session_killed(const Session *session)
1558
return(session->killed);
1562
const struct charset_info_st *session_charset(Session *session)
1564
return(session->charset());
1634
1568
Mark transaction to rollback and mark error as fatal to a sub-statement.
1651
1585
plugin_sessionvar_cleanup(this);
1653
1587
/* If necessary, log any aborted or unauthorized connections */
1654
if (getKilled() || client->wasAborted())
1588
if (killed || client->wasAborted())
1656
1590
status_var.aborted_threads++;
1659
1593
if (client->wasAborted())
1661
if (not getKilled() && variables.log_warnings > 1)
1595
if (! killed && variables.log_warnings > 1)
1663
1597
SecurityContext *sctx= &security_ctx;
1665
1599
errmsg_printf(ERRMSG_LVL_WARN, ER(ER_NEW_ABORTING_CONNECTION)
1667
, (_schema->empty() ? "unconnected" : _schema->c_str())
1601
, (db.empty() ? "unconnected" : db.c_str())
1668
1602
, sctx->getUser().empty() == false ? sctx->getUser().c_str() : "unauthenticated"
1669
1603
, sctx->getIp().c_str()
1670
1604
, (main_da.is_error() ? main_da.message() : ER(ER_UNKNOWN_ERROR)));
1806
1735
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);
1737
user_var_entry *entry= NULL;
1738
UserVarsRange ppp= user_vars.equal_range(std::string(name.str, name.length));
1815
1740
for (UserVars::iterator iter= ppp.first;
1816
iter != ppp.second; ++iter)
1741
iter != ppp.second; ++iter)
1818
return (*iter).second;
1743
entry= (*iter).second;
1821
if (not create_if_not_exists)
1824
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)
1746
if ((entry == NULL) && create_if_not_exists)
1748
entry= new (nothrow) user_var_entry(name.str, query_id);
1753
std::pair<UserVars::iterator, bool> returnable= user_vars.insert(make_pair(std::string(name.str, name.length), entry));
1755
if (not returnable.second)
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()
1765
void Session::mark_temp_tables_as_free_for_reuse()
1853
1767
for (Table *table= temporary_tables ; table ; table= table->getNext())
1855
if (table->query_id == getQueryId())
1769
if (table->query_id == query_id)
1857
1771
table->query_id= 0;
1858
1772
table->cursor->ha_reset();
1916
1831
handled either before writing a query log event (inside
1917
1832
binlog_query()) or when preparing a pending event.
1834
mysql_unlock_tables(this, lock);
1923
Note that we need to hold table::Cache::singleton().mutex() while changing the
1838
Note that we need to hold LOCK_open while changing the
1924
1839
open_tables list. Another thread may work on it.
1925
(See: table::Cache::singleton().removeTable(), mysql_wait_completed_table())
1840
(See: remove_table_from_cache(), mysql_wait_completed_table())
1926
1841
Closing a MERGE child before the parent would be fatal if the
1927
1842
other thread tries to abort the MERGE lock in between.
1961
1876
close_tables_for_reopen(&tables);
1963
1878
if ((mysql_handle_derived(lex, &mysql_derived_prepare) ||
1879
(fill_derived_tables() &&
1965
1880
mysql_handle_derived(lex, &mysql_derived_filling))))
1886
bool Session::openTables(TableList *tables, uint32_t flags)
1889
bool ret= fill_derived_tables();
1890
assert(ret == false);
1891
if (open_tables_from_list(&tables, &counter, flags) ||
1892
mysql_handle_derived(lex, &mysql_derived_prepare))
1972
1900
@note "best_effort" is used in cases were if a failure occurred on this
1973
1901
operation it would not be surprising because we are only removing because there
1974
1902
might be an issue (lame engines).
1977
bool Open_tables_state::rm_temporary_table(const TableIdentifier &identifier, bool best_effort)
1905
bool Session::rm_temporary_table(TableIdentifier &identifier, bool best_effort)
1979
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), identifier))
1907
if (plugin::StorageEngine::dropTable(*this, identifier))
1981
1909
if (not best_effort)
1984
identifier.getSQLPath(path);
1985
1911
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
1986
path.c_str(), errno);
1912
identifier.getSQLPath().c_str(), errno);
1995
bool Open_tables_state::rm_temporary_table(plugin::StorageEngine *base, const TableIdentifier &identifier)
1921
bool Session::rm_temporary_table(plugin::StorageEngine *base, TableIdentifier &identifier)
1999
if (plugin::StorageEngine::dropTable(*static_cast<Session *>(this), *base, identifier))
1925
if (plugin::StorageEngine::dropTable(*this, *base, identifier))
2002
identifier.getSQLPath(path);
2003
1927
errmsg_printf(ERRMSG_LVL_WARN, _("Could not remove temporary table: '%s', error: %d"),
2004
path.c_str(), errno);
1928
identifier.getSQLPath().c_str(), errno);
2037
1961
cerr << "\t\t Proto " << proto->schema() << " " << proto->name() << "\n";
2041
1964
cerr << "\tTabl;e Name " << table->getShare()->getSchemaName() << "." << table->getShare()->getTableName() << " : " << answer << "\n";
2046
bool Session::TableMessages::storeTableMessage(const TableIdentifier &identifier, message::Table &table_message)
1968
bool Session::storeTableMessage(const TableIdentifier &identifier, message::Table &table_message)
2048
1970
table_message_cache.insert(make_pair(identifier.getPath(), table_message));
2053
bool Session::TableMessages::removeTableMessage(const TableIdentifier &identifier)
1975
bool Session::removeTableMessage(const TableIdentifier &identifier)
2055
1977
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 */
2036
TableShareInstance *Session::getTemporaryShare(TableIdentifier::Type type_arg)
2038
temporary_shares.push_back(new TableShareInstance(type_arg)); // This will not go into the tableshare cache, so no key is used.
2040
TableShareInstance *tmp_share= temporary_shares.back();
2181
2047
} /* namespace drizzled */