Berkeley DB C API Reference
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# Berkeley DB C API Reference

DB C API | Description
--- | ---
DB->associate() | Associate a secondary index
DB->associate_foreign() | Associate a foreign index
DB->close() | Close a database
db_create | Create a database handle
DB->compact() | Compact a database
DB->del() | Delete items from a database
DB->err() | Error message
DB->exists() | Return if an item appears in a database
DB->fd() | Return a file descriptor from a database
DB->get() | Get items from a database
DB->get_byteswapped() | Return if the underlying database is in host order
DB->get_dbname() | Return the file and database name
DB->get_multiple() | Return if the database handle references multiple databases
DB->get_open_flags() | Returns the flags specified to DB->open
DB->get_type() | Return the database type
DB->join() | Perform a database join on cursors
DB->key_range() | Return estimate of key location
DB->open() | Open a database
DB->put() | Store items into a database
DB->remove() | Remove a database
DB->rename() | Rename a database
DB->set_alloc() | Set local space allocation functions
DB->set_append_recno() | Set record append callback
DB->set_bt_compare() | Set a Btree comparison function
DB->set_bt_compress() | Set Btree compression functions
DB->set_bt_minkey(), DB->get_bt_minkey() | Set/get the minimum number of keys per Btree page
DB->set_bt_prefix() | Set a Btree prefix comparison function
DB->set_cachesize(), DB->get_cachesize() | Set/get the database cache size
DB->set_create_dir(), DB->get_create_dir() | Set/get the directory in which a database is placed
DB->set_dup_compare() | Set a duplicate comparison function
DB->set_encrypt(), DB->get_encrypt_flags() | Set/get the database cryptographic key
DB->set_errcall() | Set error message callback
DB->set_errfile(), DB->get_errfile() | Set/get error message FILE
DB->set_errpfx(), DB->get_errpfx() | Set/get error message prefix
DB->set_feedback() | Set feedback callback
DB->set_flags(), DB->get_flags() | Set/get general database configuration
DB->set_h_compare() | Set a Hash comparison function
DB->set_h_ffactor(), DB->get_h_ffactor() | Set/get the Hash table density
DB->set_h_hash() | Set a hashing function
DB->set_h_nelem(), DB->get_h_nelem() | Set/get the Hash table size
DB->set_lorder(), DB->get_lorder() | Set/get the database byte order
DB->set_msgcall() | Set informational message callback
DB->set_msgfile(), DB->get_msgfile() | Set/get informational message FILE
DB->set_pagesize(), DB->get_pagesize() | Set/get the underlying database page size
DB->set_partition() | Set database partitioning
DB->set_partition_dirs(), DB->get_partition_dirs() | Set/get the directories used for database partitions
DB->set_priority(), DB->get_priority() | Set/get cache page priority
DB->set_q_extentsize(), DB->get_q_extentsize() | Set/get Queue database extent size
DB->set_re_delim(), DB->get_re_delim() | Set/get the variable-length record delimiter
DB->set_re_len(), DB->get_re_len() | Set/get the fixed-length record length
DB->set_re_pad(), DB->get_re_pad() | Set/get the fixed-length record pad byte
DB->set_re_source(), DB->get_re_source() | Set/get the backing Recno text file
DB->stat() | Database statistics
DB->stat_print() | Display database statistics
DB->sync() | Flush a database to stable storage
DB->truncate() | Empty a database
DB->upgrade() | Upgrade a database
DB->verify() | Verify/salvage a database
DB->cursor() | Create a cursor handle
DBcursor->close() | Close a cursor handle
DBcursor->cmp() | Compare two cursors for equality.
DBcursor->count() | Return count of duplicates for current key
DBcursor->del() | Delete current key/data pair
DBcursor->dup() | Duplicate the cursor handle
DBcursor->get() | Retrieve by cursor
DBcursor->put() | Store by cursor
DBcursor->set_priority(), DBcursor->get_priority() | Set/get the cursor's cache priority
DB_MULTIPLE_INIT | Initialize bulk get retrieval
DB_MULTIPLE_NEXT | Next bulk get retrieval
DB_MULTIPLE_KEY_NEXT | Next bulk get retrieval
DB_MULTIPLE_RECNO_NEXT | Next bulk get retrieval
DB_MULTIPLE_WRITE_INIT | Initialize a bulk buffer to hold key/data pairs
DB_MULTIPLE_WRITE_NEXT | Append a data item to a bulk buffer
DB_MULTIPLE_RESERVE_NEXT | Reserve space for a data item in a bulk buffer
DB_MULTIPLE_KEY_WRITE_NEXT | Append a key / data pair to a bulk buffer
DB_MULTIPLE_KEY_RESERVE_NEXT | Reserve space for a key / data pair in a bulk buffer
DB_MULTIPLE_RECNO_WRITE_INIT | Initialize a bulk buffer to hold recno/data pairs
DB_MULTIPLE_RECNO_WRITE_NEXT | Append a record number / data pair to a bulk buffer
DB_MULTIPLE_RECNO_RESERVE_NEXT | Reserve space for a record number / data pair in a bulk buffer
DB->get_env() | Return the DB's underlying DB_ENV handle
DB_ENV->add_data_dir() | add an environment data directory
DB_ENV->close() | Close an environment
db_env_create | Create an environment handle
DB_ENV->dbremove() | Remove a database
DB_ENV->dbrename() | Rename a database
DB_ENV->err() | Error message
DB_ENV->failchk() | Check for thread failure
DB_ENV->fileid_reset() | Reset database file IDs
DB_ENV->get_home() | Return environment's home directory
DB_ENV->get_open_flags() | Return flags with which the environment was opened
DB_ENV->lsn_reset() | Reset database file LSNs
DB_ENV->open() | Open an environment
DB_ENV->remove() | Remove an environment
DB_ENV->set_alloc() | Set local space allocation functions
DB_ENV->set_app_dispatch() | Configure application recovery callback
DB_ENV->set_data_dir(), DB_ENV->get_data_dirs() | Set/get the environment data directory
DB_ENV->set_create_dir(), DB_ENV->get_create_dir() | add an environment data directory
DB_ENV->set_encrypt(), DB_ENV->get_encrypt_flags() | Set/get the environment cryptographic key
DB_ENV->set_event_notify() | Set event notification callback
DB_ENV->set_errcall() | Set error message callbacks
DB_ENV->set_errfile(), DB_ENV->get_errfile() | Set/get error message FILE
DB_ENV->set_errpfx(), DB_ENV->get_errpfx() | Set/get error message prefix
DB_ENV->set_feedback() | Set feedback callback
DB_ENV->set_flags(), DB_ENV->get_flags() | Environment configuration
DB_ENV->set_intermediate_dir_mode(), DB_ENV->get_intermediate_dir_mode() | Set/get intermediate directory creation mode
DB_ENV->set_isalive() | Set thread is-alive callback
DB_ENV->set_msgcall() | Set informational message callback
DB_ENV->set_msgfile(), DB_ENV->get_msgfile() | Set/get informational message FILE
DB_ENV->set_shm_key(), DB_ENV->get_shm_key() | Set/get system memory shared segment ID
DB_ENV->set_thread_count(), DB_ENV->get_thread_count() | Set/get approximate thread count
DB_ENV->set_thread_id() | Set thread of control ID function
DB_ENV->set_thread_id_string() | Set thread of control ID format function
DB_ENV->set_timeout(), DB_ENV->get_timeout() | Set/get lock and transaction timeout
DB_ENV->set_tmp_dir(), DB_ENV->get_tmp_dir() | Set/get the environment temporary file directory
DB_ENV->set_verbose(), DB_ENV->get_verbose() | Set/get verbose messages
DB_ENV->stat_print() | Environment statistics
db_strerror | Error strings
db_version | Return version information
DB_ENV->set_lk_conflicts(), DB_ENV->get_lk_conflicts() | Set/get lock conflicts matrix
DB_ENV->set_lk_detect(), DB_ENV->get_lk_detect() | Set/get automatic deadlock detection
DB_ENV->set_lk_max_lockers(), DB_ENV->get_lk_max_lockers() | Set/get maximum number of lockers
DB_ENV->set_lk_max_locks(), DB_ENV->get_lk_max_locks() | Set/get maximum number of locks
DB_ENV->set_lk_max_objects(), DB_ENV->get_lk_max_objects() | Set/get maximum number of lock objects
DB_ENV->set_lk_partitions(), DB_ENV->get_lk_partitions() | Set/get number of lock partitions
DB_ENV->lock_detect() | Perform deadlock detection
DB_ENV->lock_get() | Acquire a lock
DB_ENV->lock_id() | Acquire a locker ID
DB_ENV->lock_id_free() | Release a locker ID
DB_ENV->lock_put() | Release a lock
DB_ENV->lock_stat() | Return lock subsystem statistics
DB_ENV->lock_stat_print() | Print lock subsystem statistics
DB_ENV->lock_vec() | Acquire/release locks
DB_ENV->log_archive() | List log and database files
DB_ENV->log_cursor() | Create a log cursor handle
DB_ENV->log_file() | Map Log Sequence Numbers to log files
DB_ENV->log_flush() | Flush log records
DB_ENV->log_printf() | Append informational message to the log
DB_ENV->log_put() | Write a log record
DB_ENV->log_set_config(), DB_ENV->log_get_config() | Configure the logging subsystem
DB_ENV->log_stat() | Return log subsystem statistics
DB_ENV->log_stat_print() | Print log subsystem statistics
DB_ENV->set_lg_bsize(), DB_ENV->get_lg_bsize() | Set/get log buffer size
DB_ENV->set_lg_dir(), DB_ENV->get_lg_dir() | Set/get the environment logging directory
DB_ENV->set_lg_filemode(), DB_ENV->get_lg_filemode() | Set/get log file mode
DB_ENV->set_lg_max(), DB_ENV->get_lg_max() | Set/get log file size
DB_ENV->set_lg_regionmax(), DB_ENV->get_lg_regionmax() | Set/get logging region size
The DB_LOGC Handle | A log cursor handle
DB_LOGC->close() | Close a log cursor
DB_LOGC->get() | Retrieve a log record
log_compare | Compare two Log Sequence Numbers
DB->get_mpf() | Return the DB_MPOOLFILE for a DB
DB_ENV->memp_fcreate() | Create a memory pool file handle
DB_ENV->memp_register() | Register a custom file type
DB_ENV->memp_stat() | Return cache statistics
DB_ENV->memp_stat_print() | Print cache statistics
DB_ENV->memp_sync() | Flush all pages from the cache
DB_ENV->memp_trickle() | Flush some pages from the cache
DB_ENV->set_cache_max(), DB_ENV->get_cache_max() | Set/get the maximum cache size
DB_ENV->set_cachesize(), DB_ENV->get_cachesize() | Set/get the environment cache size
DB_ENV->set_mp_max_openfd(), DB_ENV->get_mp_max_openfd() | Set/get the maximum number of open file descriptors
DB_ENV->set_mp_max_write(), DB_ENV->get_mp_max_write() | Set/get the maximum number of sequential disk writes
DB_ENV->set_mp_mmapsize(), DB_ENV->get_mp_mmapsize() | Set/get maximum file size to memory map when opened read-only
DB_MPOOLFILE->close() | Close a file in the cache
DB_MPOOLFILE->get() | Get page from a file in the cache
DB_MPOOLFILE->open() | Open a file in the cache
DB_MPOOLFILE->put() | Return a page to the cache
DB_MPOOLFILE->sync() | Flush pages from a file from the cache
DB_MPOOLFILE->set_clear_len(), DB_MPOOLFILE->get_clear_len() | Set/get number of bytes to clear when creating a new page
DB_MPOOLFILE->set_fileid(), DB_MPOOLFILE->get_fileid() | Set/get file unique identifier
DB_MPOOLFILE->set_flags(), DB_MPOOLFILE->get_flags() | Set/get file options
DB_MPOOLFILE->set_ftype(), DB_MPOOLFILE->get_ftype() | Set/get file type
DB_MPOOLFILE->set_lsn_offset(), DB_MPOOLFILE->get_lsn_offset() | Set/get file log-sequence-number offset
DB_MPOOLFILE->set_maxsize(), DB_MPOOLFILE->get_maxsize() | Set/get maximum file size
DB_MPOOLFILE->set_pgcookie(), DB_MPOOLFILE->get_pgcookie() | Set/get file cookie for pgin/pgout
DB_MPOOLFILE->set_priority(), DB_MPOOLFILE->get_priority() | Set/get cache file priority
DB_ENV->mutex_alloc() | Allocate a mutex
DB_ENV->mutex_free() | Free a mutex
DB_ENV->mutex_lock() | Lock a mutex
DB_ENV->mutex_set_align(), DB_ENV->mutex_get_align() | Configure mutex alignment
DB_ENV->mutex_set_increment(), DB_ENV->mutex_get_increment() | Configure number of additional mutexes
DB_ENV->mutex_set_max(), DB_ENV->mutex_get_max() | Configure total number of mutexes
DB_ENV->mutex_set_tas_spins(), DB_ENV->mutex_get_tas_spins() | Configure test-and-set mutex spin count
DB_ENV->mutex_stat() | Mutex statistics
DB_ENV->mutex_stat_print() | Print mutex statistics
DB_ENV->mutex_unlock() | Unlock a mutex
DB_ENV->rep_elect() | Hold a replication election
DB_ENV->rep_process_message() | Process a replication message
DB_ENV->rep_set_clockskew(), DB_ENV->rep_get_clockskew() | Configure master lease clock adjustment
DB_ENV->rep_set_config(), DB_ENV->rep_get_config() | Configure the replication subsystem
DB_ENV->rep_set_limit(), DB_ENV->rep_get_limit() | Limit data sent in response to a single message
DB_ENV->rep_set_nsites(), DB_ENV->rep_get_nsites() | Configure replication group site count
DB_ENV->rep_set_priority(), DB_ENV->rep_get_priority() | Configure replication site priority
DB_ENV->rep_set_request(), DB_ENV->rep_get_request() | Configure replication client retransmission requests
DB_ENV->rep_set_timeout(), DB_ENV->rep_get_timeout() | Configure replication timeouts
DB_ENV->rep_set_transport() | Configure replication transport callback
DB_ENV->rep_start() | Start replication
DB_ENV->rep_stat() | Replication statistics
DB_ENV->rep_stat_print() | Print replication statistics
DB_ENV->rep_sync() | Replication synchronization
DB_ENV->repmgr_add_remote_site() | Specify the Replication Manager's remote sites
DB_ENV->repmgr_set_ack_policy(), DB_ENV->repmgr_get_ack_policy() | Specify the Replication Manager's client acknowledgement policy
DB_ENV->repmgr_set_local_site() | Specify the Replication Manager's local site
DB_ENV->repmgr_site_list() | List the sites and their status
DB_ENV->repmgr_start() | Start the Replication Manager
DB_ENV->repmgr_stat() | Replication Manager statistics
DB_ENV->repmgr_stat_print() | Print Replication Manager statistics
db_sequence_create | Create a sequence handle
DB_SEQUENCE->close() | Close a sequence
DB_SEQUENCE->get() | Get the next sequence element(s)
DB_SEQUENCE->get_dbp() | Return a handle for the underlying sequence database
DB_SEQUENCE->get_key() | Return the key for a sequence
DB_SEQUENCE->initial_value() | Set the initial value of a sequence
DB_SEQUENCE->open() | Open a sequence
DB_SEQUENCE->remove() | Remove a sequence
DB_SEQUENCE->set_cachesize(), DB_SEQUENCE->get_cachesize() | Set/get the cache size of a sequence
DB_SEQUENCE->set_flags(), DB_SEQUENCE->get_flags() | Set/get the flags for a sequence
DB_SEQUENCE->set_range(), DB_SEQUENCE->get_range() | Set/get the range for a sequence
DB_SEQUENCE->stat() | Return sequence statistics
DB_SEQUENCE->stat_print() | Print sequence statistics
DB->get_transactional() | Does the DB have transaction support
DB_ENV->cdsgroup_begin() | Get a locker ID in Berkeley DB Concurrent Data Store
DB_ENV->set_tx_max(), DB_ENV->get_tx_max() | Set/get maximum number of transactions
DB_ENV->set_tx_timestamp(), DB_ENV->get_tx_timestamp() | Set/get recovery timestamp
DB_TXN->abort() | Abort a transaction
DB_ENV->txn_begin() | Begin a transaction
DB_ENV->txn_checkpoint() | Checkpoint the transaction subsystem
DB_TXN->commit() | Commit a transaction
DB_TXN->discard() | Discard a prepared but not resolved transaction handle
DB_TXN->id() | Return a transaction's ID
DB_TXN->prepare() | Prepare a transaction for commit
DB_ENV->txn_recover() | Distributed transaction recovery
DB_TXN->set_name(), DB_TXN->get_name() | Associate a string with a transaction
DB_TXN->set_timeout() | Set transaction timeout
DB_ENV->txn_stat() | Return transaction subsystem statistics
DB_ENV->txn_stat_print() | Print transaction subsystem statistics
db_archive | Archival utility
db_checkpoint | Transaction checkpoint utility
db_deadlock | Deadlock detection utility
db_dump | Database dump utility
db_hotbackup | Hot backup utility
db_load | Database load utility
db_printlog | Transaction log display utility
db_recover | Recovery utility
db_sql | SQL schema to Berkeley DB code in C
db_stat | Statistics utility
db_upgrade | Database upgrade utility
db_verify | Verification utility
dbm/ndbm | Compatibility for applications written to the historic dbm or hdbm interfaces
hsearch | Compatibility for applications written to the historic hsearch interface
db_env_set_func_close | Replace Berkeley DB calls to close() with the identified function.
db_env_set_func_dirfree | Specify function used to free memory obtained due to a directory walk.
db_env_set_func_dirlist | Specify function used to free memory obtained due to a directory list.
db_env_set_func_exists | Specify function used to determine whether a file exists.
db_env_set_func_file_map | Specify function used to map a file into memory.
db_env_set_func_free | Specify function used to free memory.
db_env_set_func_fsync | Specify function used to sync a file to disk.
db_env_set_func_ftruncate | Specify function used to truncate a file.
db_env_set_func_ioinfo | Specify function used to determine file characteristics.
db_env_set_func_malloc | Specify function used to allocate memory.
db_env_set_func_open | Specify function used to open a file.
db_env_set_func_pread | Specify function used to read data from an object.
db_env_set_func_pwrite | Specify function used to write data to an object.
db_env_set_func_read | Specify function used to read data from an object.
db_env_set_func_realloc | Specify function used to change the size of memory pointed to by a pointer.
db_env_set_func_region_map | Specify function used to created shared memory regions.
db_env_set_func_rename | Specify function used to change the name of a file.
db_env_set_func_seek | Specify function used to specify a location in a file.
db_env_set_func_unlink | Specify function used to delete a file.
db_env_set_func_write | Specify function used to write data to an object.
db_env_set_func_yield | Specify function used to yield the processor to another thread of control.

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8/14/2009

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