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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "heap_priv.h"
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#include <drizzled/error.h>
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#include <drizzled/table.h>
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#include <drizzled/session.h>
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#include <drizzled/current_session.h>
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#include <drizzled/field/timestamp.h>
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#include <drizzled/field/varstring.h>
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#include "drizzled/plugin/daemon.h"
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#include <boost/thread/mutex.hpp>
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#include "ha_heap.h"
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class HeapEngine : public plugin::StorageEngine
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explicit HeapEngine(string name_arg) :
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plugin::StorageEngine(name_arg,
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HTON_STATS_RECORDS_IS_EXACT |
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HTON_SKIP_STORE_LOCK |
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hp_panic(HA_PANIC_CLOSE);
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virtual Cursor *create(Table &table)
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return new ha_heap(*this, table);
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HeapEngine(string name_arg)
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: plugin::StorageEngine(name_arg,
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HTON_STATS_RECORDS_IS_EXACT |
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HTON_SKIP_STORE_LOCK |
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virtual Cursor *create(TableShare &table,
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memory::Root *mem_root)
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return new (mem_root) ha_heap(*this, table);
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const char **bas_ext() const {
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return ha_heap_exts;
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int doCreateTable(Session &session,
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const TableIdentifier &identifier,
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int doCreateTable(Session *session,
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drizzled::TableIdentifier &identifier,
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message::Table &create_proto);
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/* For whatever reason, internal tables can be created by Cursor::open()
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message::Table &create_proto,
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HP_SHARE **internal_share);
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int doRenameTable(Session&, const TableIdentifier &from, const TableIdentifier &to);
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int doRenameTable(Session*, const char * from, const char * to);
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int doDropTable(Session&, const TableIdentifier &identifier);
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int doDropTable(Session&, TableIdentifier &identifier);
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int doGetTableDefinition(Session& session,
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const TableIdentifier &identifier,
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TableIdentifier &identifier,
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message::Table &table_message);
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/* Temp only engine, so do not return values. */
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void doGetTableNames(CachedDirectory &, string& , set<string>&) { };
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uint32_t max_supported_keys() const { return MAX_KEY; }
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uint32_t max_supported_key_part_length() const { return MAX_KEY_LENGTH; }
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uint32_t index_flags(enum ha_key_alg ) const
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uint32_t index_flags(enum ha_key_alg algorithm) const
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return ( HA_ONLY_WHOLE_INDEX | HA_KEY_SCAN_NOT_ROR);
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return ((algorithm == HA_KEY_ALG_BTREE) ?
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HA_ONLY_WHOLE_INDEX |
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HA_KEY_SCAN_NOT_ROR);
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bool doDoesTableExist(Session& session, const TableIdentifier &identifier);
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void doGetTableIdentifiers(CachedDirectory &directory,
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const SchemaIdentifier &schema_identifier,
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TableIdentifier::vector &set_of_identifiers);
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void HeapEngine::doGetTableIdentifiers(CachedDirectory&,
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const SchemaIdentifier&,
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TableIdentifier::vector&)
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bool HeapEngine::doDoesTableExist(Session& session, const TableIdentifier &identifier)
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return session.getMessageCache().doesTableMessageExist(identifier);
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int HeapEngine::doGetTableDefinition(Session &session,
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const TableIdentifier &identifier,
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int HeapEngine::doGetTableDefinition(Session&,
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TableIdentifier &identifier,
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message::Table &table_proto)
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if (session.getMessageCache().getTableMessage(identifier, table_proto))
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ProtoCache::iterator iter;
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pthread_mutex_lock(&proto_cache_mutex);
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iter= proto_cache.find(identifier.getPath());
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if (iter!= proto_cache.end())
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table_proto.CopyFrom(((*iter).second));
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pthread_mutex_unlock(&proto_cache_mutex);
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We have to ignore ENOENT entries as the MEMORY table is created on open and
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not when doing a CREATE on the table.
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int HeapEngine::doDropTable(Session &session, const TableIdentifier &identifier)
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int HeapEngine::doDropTable(Session&, TableIdentifier &identifier)
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session.getMessageCache().removeTableMessage(identifier);
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int error= heap_delete_table(identifier.getPath().c_str());
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ProtoCache::iterator iter;
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pthread_mutex_lock(&proto_cache_mutex);
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iter= proto_cache.find(identifier.getPath());
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if (iter!= proto_cache.end())
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proto_cache.erase(iter);
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pthread_mutex_unlock(&proto_cache_mutex);
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return heap_delete_table(identifier.getPath().c_str());
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static HeapEngine *heap_storage_engine= NULL;
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static int heap_init(module::Context &context)
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static int heap_init(plugin::Registry ®istry)
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heap_storage_engine= new HeapEngine(engine_name);
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context.add(heap_storage_engine);
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registry.add(heap_storage_engine);
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pthread_mutex_init(&THR_LOCK_heap, MY_MUTEX_INIT_FAST);
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static int heap_deinit(plugin::Registry ®istry)
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registry.remove(heap_storage_engine);
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delete heap_storage_engine;
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int ret= hp_panic(HA_PANIC_CLOSE);
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pthread_mutex_destroy(&THR_LOCK_heap);
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/*****************************************************************************
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*****************************************************************************/
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ha_heap::ha_heap(plugin::StorageEngine &engine_arg,
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TableShare &table_arg)
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:Cursor(engine_arg, table_arg), file(0), records_changed(0), key_stat_version(0),
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internal_table(0)
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#define MEMORY_STATS_UPDATE_THRESHOLD 10
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int ha_heap::doOpen(const drizzled::TableIdentifier &identifier, int mode, uint32_t test_if_locked)
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int ha_heap::open(const char *name, int mode, uint32_t test_if_locked)
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if ((test_if_locked & HA_OPEN_INTERNAL_TABLE) || (!(file= heap_open(identifier.getPath().c_str(), mode)) && errno == ENOENT))
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if ((test_if_locked & HA_OPEN_INTERNAL_TABLE) || (!(file= heap_open(name, mode)) && errno == ENOENT))
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HA_CREATE_INFO create_info;
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internal_table= test(test_if_locked & HA_OPEN_INTERNAL_TABLE);
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memset(&create_info, 0, sizeof(create_info));
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HP_SHARE *internal_share= NULL;
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message::Table create_proto;
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if (not heap_storage_engine->heap_create_table(getTable()->in_use,
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identifier.getPath().c_str(),
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if (!heap_storage_engine->heap_create_table(ha_session(), name, table,
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file= internal_table ?
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heap_open_from_share(internal_share, mode) :
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Do same as default implementation but use file->s->name instead of
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table->getShare()->path. This is needed by Windows where the clone() call sees
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'/'-delimited path in table->getShare()->path, while ha_peap::open() was called
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table->s->path. This is needed by Windows where the clone() call sees
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'/'-delimited path in table->s->path, while ha_peap::open() was called
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with '\'-delimited path.
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Cursor *ha_heap::clone(memory::Root *)
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Cursor *ha_heap::clone(memory::Root *mem_root)
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Cursor *new_handler= getTable()->getMutableShare()->db_type()->getCursor(*getTable());
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TableIdentifier identifier(getTable()->getShare()->getSchemaName(),
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getTable()->getShare()->getTableName(),
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getTable()->getShare()->getPath());
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Cursor *new_handler= table->s->db_type()->getCursor(*table->s, mem_root);
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if (new_handler && !new_handler->ha_open(identifier, getTable()->db_stat,
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if (new_handler && !new_handler->ha_open(table, file->s->name, table->db_stat,
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HA_OPEN_IGNORE_IF_LOCKED))
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return new_handler;
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const char *ha_heap::index_type(uint32_t )
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const char *ha_heap::index_type(uint32_t inx)
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return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_BTREE) ?
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void ha_heap::set_keys_for_scanning(void)
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for (uint32_t i= 0 ; i < table->s->keys ; i++)
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if (table->key_info[i].algorithm == HA_KEY_ALG_BTREE)
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void ha_heap::update_key_stats()
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for (uint32_t i= 0; i < getTable()->getShare()->sizeKeys(); i++)
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for (uint32_t i= 0; i < table->s->keys; i++)
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KeyInfo *key= &getTable()->key_info[i];
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KEY *key=table->key_info+i;
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if (!key->rec_per_key)
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if (key->algorithm != HA_KEY_ALG_BTREE)
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if (key->flags & HA_NOSAME)
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key->rec_per_key[key->key_parts-1]= 1;
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ha_rows hash_buckets= file->getShare()->keydef[i].hash_buckets;
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uint32_t no_records= hash_buckets ? (uint) (file->getShare()->records/hash_buckets) : 2;
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ha_rows hash_buckets= file->s->keydef[i].hash_buckets;
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uint32_t no_records= hash_buckets ? (uint) (file->s->records/hash_buckets) : 2;
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if (no_records < 2)
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key->rec_per_key[key->key_parts-1]= no_records;
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records_changed= 0;
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/* At the end of update_key_stats() we can proudly claim they are OK. */
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key_stat_version= file->getShare()->key_stat_version;
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key_stat_version= file->s->key_stat_version;
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int ha_heap::doInsertRecord(unsigned char * buf)
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int ha_heap::write_row(unsigned char * buf)
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if (getTable()->next_number_field && buf == getTable()->getInsertRecord())
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ha_statistic_increment(&system_status_var::ha_write_count);
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if (table->next_number_field && buf == table->record[0])
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if ((res= update_auto_increment()))
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res= heap_write(file,buf);
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if (!res && (++records_changed*MEMORY_STATS_UPDATE_THRESHOLD >
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file->getShare()->records))
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We can perform this safely since only one writer at the time is
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allowed on the table.
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file->getShare()->key_stat_version++;
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file->s->key_stat_version++;
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int ha_heap::doUpdateRecord(const unsigned char * old_data, unsigned char * new_data)
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int ha_heap::update_row(const unsigned char * old_data, unsigned char * new_data)
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ha_statistic_increment(&system_status_var::ha_update_count);
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if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
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table->timestamp_field->set_time();
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res= heap_update(file,old_data,new_data);
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if (!res && ++records_changed*MEMORY_STATS_UPDATE_THRESHOLD >
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file->getShare()->records)
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We can perform this safely since only one writer at the time is
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allowed on the table.
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file->getShare()->key_stat_version++;
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file->s->key_stat_version++;
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int ha_heap::doDeleteRecord(const unsigned char * buf)
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int ha_heap::delete_row(const unsigned char * buf)
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ha_statistic_increment(&system_status_var::ha_delete_count);
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res= heap_delete(file,buf);
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if (!res && getTable()->getShare()->getType() == message::Table::STANDARD &&
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++records_changed*MEMORY_STATS_UPDATE_THRESHOLD > file->getShare()->records)
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if (!res && table->s->tmp_table == STANDARD_TABLE &&
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++records_changed*MEMORY_STATS_UPDATE_THRESHOLD > file->s->records)
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We can perform this safely since only one writer at the time is
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allowed on the table.
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file->getShare()->key_stat_version++;
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file->s->key_stat_version++;
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void ha_heap::drop_table(const char *)
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file->getShare()->delete_on_close= 1;
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file->s->delete_on_close= 1;
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int HeapEngine::doRenameTable(Session &session, const TableIdentifier &from, const TableIdentifier &to)
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int HeapEngine::doRenameTable(Session*,
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const char *from, const char *to)
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session.getMessageCache().renameTableMessage(from, to);
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return heap_rename(from.getPath().c_str(), to.getPath().c_str());
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return heap_rename(from,to);
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ha_rows ha_heap::records_in_range(uint32_t inx, key_range *min_key,
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key_range *max_key)
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KeyInfo *key= &getTable()->key_info[inx];
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KEY *key=table->key_info+inx;
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if (key->algorithm == HA_KEY_ALG_BTREE)
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return hp_rb_records_in_range(file, inx, min_key, max_key);
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if (!min_key || !max_key ||
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min_key->length != max_key->length ||
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return stats.records;
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/* Assert that info() did run. We need current statistics here. */
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assert(key_stat_version == file->getShare()->key_stat_version);
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assert(key_stat_version == file->s->key_stat_version);
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return key->rec_per_key[key->key_parts-1];
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int HeapEngine::doCreateTable(Session &session,
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int HeapEngine::doCreateTable(Session *session,
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Table &table_arg,
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const TableIdentifier &identifier,
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drizzled::TableIdentifier &identifier,
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message::Table& create_proto)
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HP_SHARE *internal_share;
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const char *table_name= identifier.getPath().c_str();
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error= heap_create_table(&session, table_name, &table_arg,
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error= heap_create_table(session, table_name, &table_arg,
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&internal_share);
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session.getMessageCache().storeTableMessage(identifier, create_proto);
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pthread_mutex_lock(&proto_cache_mutex);
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proto_cache.insert(make_pair(table_name, create_proto));
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pthread_mutex_unlock(&proto_cache_mutex);
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713
message::Table &create_proto,
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714
HP_SHARE **internal_share)
683
uint32_t key, parts, mem_per_row_keys= 0;
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uint32_t keys= table_arg->getShare()->sizeKeys();
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uint32_t key, parts, mem_per_row_keys= 0, keys= table_arg->s->keys;
685
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uint32_t auto_key= 0, auto_key_type= 0;
686
718
uint32_t max_key_fieldnr = 0, key_part_size = 0, next_field_pos = 0;
687
uint32_t column_count= table_arg->getShare()->sizeFields();
688
std::vector<HP_KEYDEF> keydef;
719
uint32_t column_idx, column_count= table_arg->s->fields;
720
HP_COLUMNDEF *columndef;
723
char buff[FN_REFLEN];
725
TableShare *share= table_arg->s;
690
726
bool found_real_auto_increment= 0;
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731
* can return a number more than that, we trap it here instead of casting
696
732
* to a truncated integer.
698
uint64_t num_rows= table_arg->getShare()->getMaxRows();
734
uint64_t num_rows= share->getMaxRows();
699
735
if (num_rows > UINT32_MAX)
738
if (!(columndef= (HP_COLUMNDEF*) malloc(column_count * sizeof(HP_COLUMNDEF))))
741
for (column_idx= 0; column_idx < column_count; column_idx++)
743
Field* field= *(table_arg->field + column_idx);
744
HP_COLUMNDEF* column= columndef + column_idx;
745
column->type= (uint16_t)field->type();
746
column->length= field->pack_length();
747
column->offset= field->offset(field->table->record[0]);
751
column->null_bit= field->null_bit;
752
column->null_pos= (uint) (field->null_ptr - (unsigned char*) table_arg->record[0]);
760
if (field->type() == DRIZZLE_TYPE_VARCHAR)
762
column->length_bytes= (uint8_t)(((Field_varstring*)field)->length_bytes);
766
column->length_bytes= 0;
702
770
for (key= parts= 0; key < keys; key++)
703
771
parts+= table_arg->key_info[key].key_parts;
706
std::vector<HA_KEYSEG> seg_buffer;
707
seg_buffer.resize(parts);
708
HA_KEYSEG *seg= &seg_buffer[0];
773
if (!(keydef= (HP_KEYDEF*) malloc(keys * sizeof(HP_KEYDEF) +
774
parts * sizeof(HA_KEYSEG))))
776
free((void *) columndef);
780
seg= reinterpret_cast<HA_KEYSEG*> (keydef + keys);
710
781
for (key= 0; key < keys; key++)
712
KeyInfo *pos= &table_arg->key_info[key];
713
KeyPartInfo *key_part= pos->key_part;
714
KeyPartInfo *key_part_end= key_part + pos->key_parts;
783
KEY *pos= table_arg->key_info+key;
784
KEY_PART_INFO *key_part= pos->key_part;
785
KEY_PART_INFO *key_part_end= key_part + pos->key_parts;
716
787
keydef[key].keysegs= (uint) pos->key_parts;
717
788
keydef[key].flag= (pos->flags & (HA_NOSAME | HA_NULL_ARE_EQUAL));
718
789
keydef[key].seg= seg;
720
mem_per_row_keys+= sizeof(char*) * 2; // = sizeof(HASH_INFO)
791
switch (pos->algorithm) {
792
case HA_KEY_ALG_UNDEF:
793
case HA_KEY_ALG_HASH:
794
keydef[key].algorithm= HA_KEY_ALG_HASH;
795
mem_per_row_keys+= sizeof(char*) * 2; // = sizeof(HASH_INFO)
797
case HA_KEY_ALG_BTREE:
798
keydef[key].algorithm= HA_KEY_ALG_BTREE;
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mem_per_row_keys+=sizeof(TREE_ELEMENT)+pos->key_length+sizeof(char*);
802
assert(0); // cannot happen
722
805
for (; key_part != key_part_end; key_part++, seg++)
724
807
Field *field= key_part->field;
809
if (pos->algorithm == HA_KEY_ALG_BTREE)
810
seg->type= field->key_type();
727
813
if ((seg->type = field->key_type()) != (int) HA_KEYTYPE_TEXT &&
728
814
seg->type != HA_KEYTYPE_VARTEXT1 &&
770
856
auto_key= key+ 1;
771
857
auto_key_type= field->key_type();
773
if ((uint)field->position() + 1 > max_key_fieldnr)
859
if ((uint)field->field_index + 1 > max_key_fieldnr)
775
861
/* Do not use seg->fieldnr as it's not reliable in case of temp tables */
776
max_key_fieldnr= field->position() + 1;
862
max_key_fieldnr= field->field_index + 1;
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if (key_part_size < table_arg->getShare()->null_bytes + ((table_arg->getShare()->last_null_bit_pos+7) >> 3))
867
if (key_part_size < share->null_bytes + ((share->last_null_bit_pos+7) >> 3))
783
869
/* Make sure to include null fields regardless of the presense of keys */
784
key_part_size = table_arg->getShare()->null_bytes + ((table_arg->getShare()->last_null_bit_pos+7) >> 3);
870
key_part_size = share->null_bytes + ((share->last_null_bit_pos+7) >> 3);
789
875
if (table_arg->found_next_number_field)
791
keydef[table_arg->getShare()->next_number_index].flag|= HA_AUTO_KEY;
792
found_real_auto_increment= table_arg->getShare()->next_number_key_offset == 0;
877
keydef[share->next_number_index].flag|= HA_AUTO_KEY;
878
found_real_auto_increment= share->next_number_key_offset == 0;
794
880
HP_CREATE_INFO hp_create_info;
795
881
hp_create_info.auto_key= auto_key;
799
885
hp_create_info.max_table_size=session->variables.max_heap_table_size;
800
886
hp_create_info.with_auto_increment= found_real_auto_increment;
801
887
hp_create_info.internal_table= internal_table;
802
hp_create_info.max_chunk_size= table_arg->getShare()->block_size;
804
error= heap_create(table_name,
808
table_arg->getShare()->getRecordLength(), mem_per_row_keys,
809
static_cast<uint32_t>(num_rows), /* We check for overflow above, so cast is fine here. */
811
&hp_create_info, internal_share);
888
hp_create_info.max_chunk_size= share->block_size;
889
hp_create_info.is_dynamic= (share->row_type == ROW_TYPE_DYNAMIC);
891
error= heap_create(internal::fn_format(buff,table_name,"","",
892
MY_REPLACE_EXT|MY_UNPACK_FILENAME),
894
column_count, columndef,
895
max_key_fieldnr, key_part_size,
896
share->reclength, mem_per_row_keys,
897
static_cast<uint32_t>(num_rows), /* We check for overflow above, so cast is fine here. */
899
&hp_create_info, internal_share);
901
free((unsigned char*) keydef);
902
free((void *) columndef);