api_flags

db_env_create
	DB_CXX_NO_EXCEPTIONS		# C++: return error values

DbEnv.backup
	# Remove all files from the target directory tree first.
	DB_BACKUP_CLEAN
	DB_BACKUP_FILES			# Copy plain files too.
	DB_BACKUP_NO_LOGS		# Don't backup log files.
	DB_BACKUP_SINGLE_DIR		# All files go to a single directory.
	DB_BACKUP_UPDATE		# Incremental backup.
	DB_CREATE			# Create the target directories.
	DB_EXCL				# Error if a target file exists.
	
DbEnv.close
	# Sync database when automatically closing its db handles.
	DB_FORCESYNC			

DbEnv.dbremove
	DB_AUTO_COMMIT			# Implied transaction
	DB_LOG_NO_DATA			# UNDOC: Don't log the data.
	DB_NOSYNC			# UNDOC: Don't sync for a subdb remove
	DB_TXN_NOT_DURABLE		# UNDOC: Don't log the remove

DbEnv.dbrename
	DB_AUTO_COMMIT			# Implied transaction
	DB_NOSYNC			# Don't sync for a subdb rename

DbEnv.fileid_reset
	DB_ENCRYPT			# File contains encrypted databases

DbEnv.log_verify
	DB_LOG_VERIFY_ERR		# Verify failed.
	DB_LOG_VERIFY_CAF		# Continue after a failed check.
	# Not the entire logs are verified, due to user specified log range,
	# archiving, or other reasons. Only part of the entire logs verified.
	DB_LOG_VERIFY_PARTIAL
	DB_LOG_VERIFY_DBFILE		# Verify only logs of one db file.
	# Pre-scan log from last to first record to get aborts and timestamps.
	DB_LOG_VERIFY_FORWARD		
	DB_LOG_VERIFY_INTERR		# Got internal error during verify.
	DB_LOG_VERIFY_WARNING		# Got warnings during verify.
	DB_LOG_VERIFY_VERBOSE		# Output verbose information.

DbEnv.open
	DB_CREATE			# Create as necessary
	DB_FAILCHK			# Run failchk on open
	DB_FAILCHK_ISALIVE		# UNDOC: failchk with isalive, for SQL
	DB_INIT_CDB			# Concurrent Access Methods
	DB_INIT_LOCK			# Initialize locking
	DB_INIT_LOG			# Initialize logging
	DB_INIT_MPOOL			# Initialize mpool
	DB_INIT_MUTEX			# Initialize mutex
	DB_INIT_REP			# Initialize replication
	DB_INIT_TXN			# Initialize transactions
	DB_LOCKDOWN			# Lock memory into physical core
	DB_NO_CHECKPOINT		# UNDOC: Recover but do not checkpoint
	DB_PRIVATE			# DB_ENV is process local
	DB_RECOVER			# Run normal recovery
	DB_RECOVER_FATAL		# Run catastrophic recovery
	DB_REGISTER			# Multi-process registry
	DB_SYSTEM_MEM			# Use system-backed memory
	DB_THREAD			# Handle is free-threaded
	DB_USE_ENVIRON			# Use the environment
	DB_USE_ENVIRON_ROOT		# Use the environment if root

DbEnv.lock_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.lock_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_LOCK_CONF		# Print lock conflict matrix
	DB_STAT_LOCK_LOCKERS		# Print lockers
	DB_STAT_LOCK_OBJECTS		# Print lock objects
	DB_STAT_LOCK_PARAMS		# Print lock parameters
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.lock_vec
	DB_LOCK_CHECK			# UNDOC: check for a lock
	DB_LOCK_IGNORE_REC		# UNDOC: get lock during recovery
	DB_LOCK_NOWAIT			# Don't wait for an unavailable lock
	DB_LOCK_RECORD			# UNDOC: record lock
	DB_LOCK_SET_TIMEOUT		# UNDOC: set lock timeout
	DB_LOCK_SWITCH			# UNDOC: switch existing lock
	DB_LOCK_UPGRADE			# UNDOC: upgrade existing lock

DbEnv.log_archive
	DB_ARCH_ABS			# Absolute pathnames
	DB_ARCH_DATA			# Data files
	DB_ARCH_LOG			# Log files
	DB_ARCH_REMOVE			# Remove log files

DbEnv.log_put
	DB_FLUSH			# Flush data to disk
	DB_LOG_CHKPNT			# UNDOC: Flush supports a checkpoint
	DB_LOG_COMMIT			# UNDOC: Flush supports a commit
	DB_LOG_NOCOPY			# UNDOC: Don't copy data
	DB_LOG_NOT_DURABLE		# UNDOC: Do not log; keep in memory
	DB_LOG_WRNOSYNC			# UNDOC: Write, don't sync log_put

DbEnv.log_set_config
	DB_LOG_DIRECT			# Don't buffer log files in the OS
	DB_LOG_DSYNC			# Set O_DSYNC on the log
	DB_LOG_AUTO_REMOVE		# Automatically remove log files
	DB_LOG_IN_MEMORY		# Store logs in buffers in memory
	DB_LOG_ZERO			# Zero log file on creation

DbEnv.log_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.log_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.lsn_reset
	DB_ENCRYPT			# File contains encrypted databases

DbEnv.memp_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.memp_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_MEMP_HASH		# Print mpool hash buckets
	DB_STAT_MEMP_NOERROR		# UNDOC: continue on error
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.mutex_alloc
	DB_MUTEX_ALLOCATED		# UNDOC: Mutex currently allocated
	DB_MUTEX_LOCKED			# UNDOC: Mutex currently locked
	DB_MUTEX_LOGICAL_LOCK		# UNDOC: Mutex backs a database lock
	DB_MUTEX_PROCESS_ONLY		# Mutex private to a process
	DB_MUTEX_SELF_BLOCK		# Must be able to block self
	DB_MUTEX_SHARED			# Shared (read/write) mutex

DbEnv.mutex_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.mutex_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.remove
	DB_FORCE
	DB_USE_ENVIRON			# Use the environment
	DB_USE_ENVIRON_ROOT		# Use the environment if root

DbEnv.rep_set_config
	DB_REPMGR_CONF_2SITE_STRICT	# Don't cheat on election votes
	DB_REPMGR_CONF_ELECTIONS	# Manage elections to choose master
	DB_REP_CONF_AUTOINIT		# automatic client init
	DB_REP_CONF_AUTOROLLBACK	# UNDOC: discard txns to sync w/ master
	DB_REP_CONF_BULK		# Bulk transfer
	DB_REP_CONF_DELAYCLIENT		# Delay client synchronization
	DB_REP_CONF_INMEM		# In-memory replication
	DB_REP_CONF_LEASE		# Master leases
	DB_REP_CONF_NOWAIT		# Don't wait, return error

DbEnv.rep_set_transport
	DB_REP_ANYWHERE			# Message can be serviced anywhere
	DB_REP_NOBUFFER			# Do not buffer this message
	DB_REP_PERMANENT		# Important -- app may want to flush
	DB_REP_REREQUEST		# This msg already been requested

DbEnv.rep_start
	DB_REP_CLIENT			# Client
	DB_REP_MASTER			# Master

DbEnv.rep_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.rep_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems
	DB_STAT_SUMMARY			# UNDOC: print summary

# Covers both flags to the callback-setting method, and the callback itself
DbEnv.repmgr_msg_dispatch
	DB_REPMGR_NEED_RESPONSE		# Synchronous request message type

DbEnv.repmgr_start
	DB_REP_CLIENT			# Client
	DB_REP_ELECTION			# Election
	DB_REP_MASTER			# Master

DbEnv.repmgr_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.repmgr_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.set_encrypt
	DB_ENCRYPT_AES			# AES, assumes SHA1 checksum

DbEnv.set_feedback.op
	DB_RECOVER			# Running recovery.

DbEnv.set_flags
	DB_AUTO_COMMIT			# Implied transaction
	DB_CDB_ALLDB			# Set CDB locking per environment
	DB_DATABASE_LOCKING		# UNDOC: try database-level locking
	DB_DIRECT_DB			# Don't buffer databases in the OS
	DB_DSYNC_DB			# Set O_DSYNC on the databases
	DB_HOTBACKUP_IN_PROGRESS	# Inhibit bulk loading optimization
	DB_MULTIVERSION			# Multiversion concurrency control
	DB_NOLOCKING			# Set locking/mutex behavior
	DB_NOMMAP			# Don't mmap the underlying file
	DB_NOPANIC			# Set panic state per environment
	DB_NOFLUSH			# UNDOC: don't flush cache on close
	DB_OVERWRITE			# Overwrite unlinked region files
	DB_PANIC_ENVIRONMENT		# Set panic state per environment
	DB_REGION_INIT			# Page-fault regions on open
	DB_TIME_NOTGRANTED		# Return NOTGRANTED on timeout
	DB_TXN_NOSYNC			# Do not sync log on commit
	DB_TXN_NOWAIT			# Do not wait for locks
	DB_TXN_SNAPSHOT			# Snapshot isolation
	DB_TXN_WRITE_NOSYNC		# Write the log bug don't sync
	DB_YIELDCPU			# Yield the CPU (a lot)

DbEnv.set_isalive
	DB_MUTEX_ALLOCATED		# UNDOC: Mutex currently allocated
	DB_MUTEX_LOCKED			# UNDOC: Mutex currently locked
	DB_MUTEX_LOGICAL_LOCK		# UNDOC: Mutex backs a database lock
	DB_MUTEX_PROCESS_ONLY		# Mutex private to a process
	DB_MUTEX_SELF_BLOCK		# Must be able to block self

DbEnv.set_timeout
	DB_SET_LOCK_TIMEOUT		# Set lock timeout
	DB_SET_TXN_NOW			# UNDOC: Timeout lock now
	DB_SET_TXN_TIMEOUT		# Set transaction timeout
	DB_SET_REG_TIMEOUT		# Set dbregister timeout

DbEnv.set_verbose
	DB_VERB_BACKUP			# Backup information
	DB_VERB_DEADLOCK		# Deadlock detection information
	DB_VERB_FILEOPS			# Major file operations
	DB_VERB_FILEOPS_ALL		# All file operations
	DB_VERB_RECOVERY		# Recovery information
	DB_VERB_REGISTER		# Dump waits-for table
	DB_VERB_REPLICATION		# All replication and repmgr output
	DB_VERB_REPMGR_CONNFAIL		# Repmgr connection failure output
	DB_VERB_REPMGR_MISC		# Miscellaneous repmgr output
	DB_VERB_REP_ELECT		# Replication election output
	DB_VERB_REP_LEASE		# Replication master lease output
	DB_VERB_REP_MISC		# Miscellaneous replication output
	DB_VERB_REP_MSGS		# Replication message output
	DB_VERB_REP_SYNC		# Replication client sync output
	DB_VERB_REP_SYSTEM		# Replication system messages
	DB_VERB_REP_TEST		# Replication temporary test output
	DB_VERB_WAITSFOR		# Dump waits-for table

DbEnv.stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbEnv.txn_begin
	DB_IGNORE_LEASE			# UNDOC: Ignore leases
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_TXN_NOSYNC			# Do not sync log on commit
	DB_TXN_NOWAIT			# Do not wait for locks
	DB_TXN_FAMILY			# Cursors and child txns are
					# independent but lock-compatible
	DB_TXN_SNAPSHOT			# Snapshot isolation
	DB_TXN_SYNC			# Always sync log on commit
	DB_TXN_WAIT			# Always wait for locks in this txn
	DB_TXN_WRITE_NOSYNC		# Write the log but don't sync
	DB_TXN_BULK			# Enable transactional bulk loading 

DbEnv.txn_checkpoint
	DB_CKP_INTERNAL			# UNDOC: internally generated checkpoint
	DB_FORCE			# Force

DbEnv.txn_recover
	__MASK=0xff			# Berkeley DB operation codes.

DbEnv.txn_stat
	DB_STAT_CLEAR			# Clear stats after return

DbEnv.txn_stat_print
	DB_STAT_ALL			# Everything
	DB_STAT_ALLOC			# Print allocation information
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbLogc.get
	__MASK=0xff			# Berkeley DB operation codes.

DbMpoolFile.close
	DB_MPOOL_DISCARD		# UNDOC: Discard file
	DB_FLUSH			# UNDOC: opened to flush a page
	DB_MPOOL_NOLOCK			# UNDOC: Already have mpf locked

DbMpoolFile.get
	DB_MPOOL_CREATE			# Create a page
	DB_MPOOL_DIRTY			# Get page for an update
	DB_MPOOL_EDIT			# Modify without copying
	DB_MPOOL_FREE			# UNDOC: Free page if present
	DB_MPOOL_LAST			# Return the last page
	DB_MPOOL_NEW			# Create a new page
	DB_MPOOL_TRY			# Try to read a page, but don't block

DbMpoolFile.open
	DB_CREATE			# Create as necessary
	DB_DIRECT			# Don't buffer the file in the OS
	DB_DURABLE_UNKNOWN		# UNDOC: Durability on open
	DB_EXTENT			# UNDOC: dealing with an extent
	DB_FLUSH			# UNDOC: opened to flush a page
	DB_MULTIVERSION			# Multiversion concurrency control
	DB_NOMMAP			# Don't mmap underlying file
	DB_ODDFILESIZE			# Truncate file to N * pgsize
	DB_RDONLY			# Read-only (O_RDONLY)
	DB_TXN_NOT_DURABLE		# UNDOC: Mark file not durable on open

DbMpoolFile.set_flags
	DB_MPOOL_NOFILE			# Never open a backing file
	DB_MPOOL_UNLINK			# Unlink the file on last close

DbSequence.get
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_TXN_NOSYNC			# Do not sync log on commit

DbSequence.open
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_CREATE			# Create as necessary
	DB_EXCL				# Exclusive open (O_EXCL)
	DB_THREAD			# Handle is free-threaded

DbSequence.remove
	DB_TXN_NOSYNC			# Do not sync log on commit

DbSequence.set_flags
	DB_SEQ_DEC			# Decrement sequence
	DB_SEQ_INC			# Increment sequence
	DB_SEQ_RANGE_SET		# UNDOC: Range set
	DB_SEQ_WRAP			# Wrap sequence at min/max
	DB_SEQ_WRAPPED			# UNDOC: Just wrapped

DbSequence.stat
	DB_STAT_CLEAR			# Clear stats after return

DbSequence.stat_print
	DB_STAT_CLEAR			# Clear stats after return
	DB_STAT_SUBSYSTEM		# Print subsystems

DbSite.set_config
	DB_BOOTSTRAP_HELPER		# Join target for new group member
	DB_GROUP_CREATOR		# Primordial membership DB creator
	DB_LEGACY			# Upgrading pre-5.2 group
	DB_LOCAL_SITE			# Identifies this as the local site
	DB_REPMGR_PEER			# C2C synchronization

DbTxn.commit
	DB_TXN_NOSYNC			# Do not sync log on commit
	DB_TXN_SYNC			# Always sync log on commit

DbTxn.set_timeout
	DB_SET_LOCK_TIMEOUT		# Set lock timeout
	DB_SET_TXN_TIMEOUT		# Set transaction timeout

db_create
	DB_CXX_NO_EXCEPTIONS		# C++: return error values
	DB_XA_CREATE			# Create a DBP for an XA database

Db.associate
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_CREATE			# Create as necessary
	DB_IMMUTABLE_KEY		# Secondary key is immutable

Db.associate_foreign
	DB_FOREIGN_ABORT		# If foreign key exists, delete aborts
	DB_FOREIGN_CASCADE		# If foreign key exists, delete cascades
	DB_FOREIGN_NULLIFY		# If foreign key exists, nullify it

Db.close
	DB_NOSYNC			# Berkeley DB operation codes.

Db.compact
	DB_FREELIST_ONLY		# Just sort and truncate
	DB_FREE_SPACE			# Free space

Db.cursor
	DB_CURSOR_BULK			# Optimize for bulk updates
	DB_CURSOR_TRANSIENT		# UNDOC: Single-use cursor
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_RECOVER			# Called from recovery (internal)
	DB_WRITECURSOR			# Cursor can update (CDB)
	DB_WRITELOCK			# Cursor should get write locks
	DB_TXN_SNAPSHOT			# Snapshot isolation

Db.del
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_MULTIPLE			# Delete multiple data values
	DB_MULTIPLE_KEY			# Delete multiple key/data pairs

Db.exists
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_RMW				# Acquire write lock immediately

Db.get
	__MASK=0xff			# Berkeley DB operation codes.
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_IGNORE_LEASE			# Ignore leases
	DB_MULTIPLE			# Return multiple data values
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_RMW				# Acquire write lock immediately

Db.pget
	__MASK=0xff			# Berkeley DB operation codes.
	DB_IGNORE_LEASE			# Ignore leases
	DB_MULTIPLE			# Return multiple data values
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_RMW				# Acquire write lock immediately

Db.join
	DB_JOIN_NOSORT			# Don't try to optmize join

Db.open
	DB_AUTO_COMMIT			# Implied transaction
	DB_CREATE			# Create file as necessary
	DB_EXCL				# Exclusive open (O_EXCL)
	DB_FCNTL_LOCKING		# UNDOC: fcntl(2) locking
	DB_MULTIVERSION			# Multiversion concurrency control
	DB_NOMMAP			# Don't mmap underlying file
	DB_NO_AUTO_COMMIT		# UNDOC: override env's AUTO_COMMIT
	DB_RDONLY			# Read-only (O_RDONLY)
	DB_RDWRMASTER			# UNDOC: allow subdb master open R/W
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_THREAD			# Handle is free-threaded
	DB_TRUNCATE			# Discard existing DB (O_TRUNC)

	# The following flags aren't actually part of the Db.open method
	# API, but they are accepted by the underlying __db_open function.
	DB_DURABLE_UNKNOWN		# UNDOC: Durability on open
	DB_INTERNAL_PERSISTENT_DB	# UNDOC: Open db in metadata dir
	DB_INTERNAL_TEMPORARY_DB	# UNDOC: Open db in env home dir
	DB_NOERROR			# UNDOC: Don't raise errors.
	DB_ODDFILESIZE			# UNDOC: Truncate file to N * pgsize
	DB_WRITEOPEN			# UNDOC: open with write lock

	# The following flags are DB constructor flags.  However, create and/or
	# open of BDB XML containers is done in a single call (rather than the
	# two-call "construct the object, then open it" paradigm used by DB),
	# and they can't collide for that reason.
	DB_CXX_NO_EXCEPTIONS		# C++: return error values

Db.put
	__MASK=0xff			# Berkeley DB operation codes.
	DB_AUTO_COMMIT			# UNDOC: compatibility only
	DB_MULTIPLE			# Put multiple (from key and data DBTs)
	DB_MULTIPLE_KEY			# Put multiple (from key DBT)

Db.set_encrypt
	DB_ENCRYPT_AES			# AES, assumes SHA1 checksum

Db.set_feedback
	DB_UPGRADE			# Upgrading
	DB_VERIFY			# Verifying

Db.set_flags
	DB_CHKSUM			# Checksums
	DB_DUP				# Btree, Hash: duplicate keys
	DB_DUPSORT			# Btree, Hash: sorted duplicated
	DB_ENCRYPT			# AES, assumes SHA1 checksum
	DB_INORDER			# Queue: strict ordering on consume
	DB_RECNUM			# Btree: record numbers
	DB_RENUMBER			# Recno: renumber on insert/delete
	DB_REVSPLITOFF			# Btree: turn off reverse splits
	DB_SNAPSHOT			# Recno: snapshot the input
	DB_TXN_NOT_DURABLE		# Do not log changes

Db.stat
	DB_FAST_STAT			# Don't traverse the database
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation

Db.truncate
	DB_AUTO_COMMIT			# UNDOC: compatibility only

Db.upgrade
	DB_DUPSORT			# Upgrade duplicate data items

Db.verify
	DB_AGGRESSIVE			# Salvage whatever could be data
	DB_NOORDERCHK			# Skip sort order/hashing check
	DB_ORDERCHKONLY			# Only perform the order check
	DB_PRINTABLE			# Use printable format for salvage
	DB_PR_PAGE			# UNDOC: Show page contents (-da)
	DB_PR_RECOVERYTEST		# UNDOC: Recover test (-dr)
	DB_SALVAGE			# Salvage what looks like data
	DB_UNREF			# UNDOC: Report unreferenced pages
	DB_VERIFY_PARTITION		# Verifying a partition

	# Flags understood by the btree structure checks (__bam_vrfy_subtree).
	# These share the same space as the global flags to Db.verify.
	DB_ST_DUPOK			# UNDOC: Duplicates are acceptable
	DB_ST_DUPSET			# UNDOC: Subtree is in a duplicate tree
	DB_ST_DUPSORT			# UNDOC: Duplicates are sorted
	DB_ST_IS_RECNO			# UNDOC: Subtree is a recno
	DB_ST_OVFL_LEAF			# UNDOC: Overflow reffed from leaf page
	DB_ST_RECNUM			# UNDOC: Subtree has record numbering on
	DB_ST_RELEN			# UNDOC: Subtree has fixed-length recs
	DB_ST_TOPLEVEL			# UNDOC: Subtree == entire tree

	# Flags understood by __bam_salvage and __db_salvage.  These need not
	# share name space with the __bam_vrfy_subtree flags, but must share
	# with Db.verify.
	DB_SA_SKIPFIRSTKEY		# UNDOC: I have no idea what this does.
	DB_SA_UNKNOWNKEY		# UNDOC: The salvage key is unknown

DbCursor.dup
	__MASK=0xff			# Berkeley DB operation codes.
	DB_SHALLOW_DUP			# UNDOC: Don't duplicate compression info

DbCursor.get
	__MASK=0xff			# Berkeley DB operation codes.
	DB_IGNORE_LEASE			# Ignore leases
	DB_MULTIPLE			# Return multiple data values
	DB_MULTIPLE_KEY			# Return multiple key/data pairs
	DB_READ_COMMITTED		# Degree 2 isolation
	DB_READ_UNCOMMITTED		# Degree 1 isolation
	DB_RMW				# Acquire write lock immediately

DbCursor.put
	__MASK=0xff			# Berkeley DB operation codes.