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/home/swipl/lib/swipl/library/bdb.pl
AllApplicationManualNameSummaryHelp

  • swipl
    • library
      • error.pl -- Error generating support
      • apply.pl -- Apply predicates on a list
      • lists.pl -- List Manipulation
      • debug.pl -- Print debug messages and test assertions
      • broadcast.pl -- Event service
      • socket.pl -- Network socket (TCP and UDP) library
      • predicate_options.pl -- Access and analyse predicate options
      • shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
      • option.pl -- Option list processing
      • uid.pl
      • unix.pl -- Unix specific operations
      • syslog.pl -- Unix syslog interface
      • thread_pool.pl -- Resource bounded thread management
      • gensym.pl -- Generate unique symbols
      • settings.pl -- Setting management
      • arithmetic.pl -- Extensible arithmetic
      • main.pl -- Provide entry point for scripts
      • readutil.pl -- Read utilities
      • ssl.pl -- Secure Socket Layer (SSL) library
      • crypto.pl -- Cryptography and authentication library
      • filesex.pl -- Extended operations on files
      • doc_http.pl -- Documentation server
      • pldoc.pl -- Process source documentation
      • operators.pl -- Manage operators
      • pairs.pl -- Operations on key-value lists
      • prolog_source.pl -- Examine Prolog source-files
      • sgml.pl -- SGML, XML and HTML parser
      • quasi_quotations.pl -- Define Quasi Quotation syntax
      • uri.pl -- Process URIs
      • url.pl -- Analysing and constructing URL
      • www_browser.pl -- Open a URL in the users browser
      • prolog_colour.pl -- Prolog syntax colouring support.
      • record.pl -- Access compound arguments by name
      • prolog_xref.pl -- Prolog cross-referencer data collection
      • occurs.pl -- Finding and counting sub-terms
      • ordsets.pl -- Ordered set manipulation
      • assoc.pl -- Binary associations
      • ugraphs.pl -- Graph manipulation library
      • xpath.pl -- Select nodes in an XML DOM
      • iostream.pl -- Utilities to deal with streams
      • atom.pl -- Operations on atoms
      • porter_stem.pl
      • solution_sequences.pl -- Modify solution sequences
      • prolog_pack.pl -- A package manager for Prolog
      • process.pl -- Create processes and redirect I/O
      • memfile.pl
      • prolog_config.pl -- Provide configuration information
      • git.pl -- Run GIT commands
      • ctypes.pl -- Character code classification
      • time.pl -- Time and alarm library
      • utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
      • base64.pl -- Base64 encoding and decoding
      • sha.pl -- SHA secure hashes
      • crypt.pl
      • persistency.pl -- Provide persistent dynamic predicates
      • pure_input.pl -- Pure Input from files and streams
      • nb_set.pl -- Non-backtrackable sets
      • xsdp_types.pl -- XML-Schema primitive types
      • uuid.pl -- Universally Unique Identifier (UUID) Library
      • pcre.pl -- Perl compatible regular expression matching for SWI-Prolog
      • aggregate.pl -- Aggregation operators on backtrackable predicates
      • rdf_write.pl -- Write RDF/XML from a list of triples
      • rdf.pl -- RDF/XML parser
      • sgml_write.pl -- XML/SGML writer module
      • archive.pl -- Access several archive formats
      • csv.pl -- Process CSV (Comma-Separated Values) data
      • dialect.pl -- Support multiple Prolog dialects
      • apply_macros.pl -- Goal expansion rules to avoid meta-calling
      • dif.pl -- The dif/2 constraint
      • thread.pl -- High level thread primitives
      • rdf_triple.pl -- Create triples from intermediate representation
      • rdf_parser.pl
      • rewrite_term.pl
      • rbtrees.pl -- Red black trees
      • nb_rbtrees.pl -- Non-backtrackable operations on red black trees
      • pengines.pl -- Pengines: Web Logic Programming Made Easy
      • sandbox.pl -- Sandboxed Prolog code
      • prolog_format.pl -- Analyse format specifications
      • random.pl -- Random numbers
      • pengines_io.pl -- Provide Prolog I/O for HTML clients
      • yall.pl -- Lambda expressions
      • zlib.pl -- Zlib wrapper for SWI-Prolog
      • bdb.pl -- Berkeley DB interface
        • bdb_init/1
        • bdb_init/2
        • bdb_close_environment/1
        • bdb_current_environment/1
        • bdb_environment_property/2
        • bdb_open/4
        • bdb_close/1
        • bdb_put/3
        • bdb_del/3
        • bdb_delall/3
        • bdb_get/3
        • bdb_enum/3
        • bdb_getall/3
        • bdb_current/1
        • bdb_closeall/0
        • bdb_transaction/1
        • bdb_transaction/2
        • bdb_version/1
      • hash_stream.pl -- Maintain a hash on a stream
      • md5.pl -- MD5 hashes
      • pprint.pl -- Pretty Print Prolog terms
      • modules.pl -- Module utility predicates
      • lazy_lists.pl -- Lazy list handling
      • edinburgh.pl -- Some traditional Edinburgh predicates
      • prolog_clause.pl -- Get detailed source-information about a clause
      • prolog_breakpoints.pl -- Manage Prolog break-points
      • dicts.pl -- Dict utilities
      • streampool.pl -- Input multiplexing
      • redis.pl -- Redis client
      • backcomp.pl -- Backward compatibility
      • plunit.pl -- Unit Testing
      • jpl.pl -- A Java interface for SWI Prolog 7.x
      • unicode.pl -- Unicode string handling
      • redis_streams.pl -- Using Redis streams
      • charsio.pl -- I/O on Lists of Character Codes
      • optparse.pl -- command line parsing
      • strings.pl -- String utilities
      • system.pl -- System utilities
      • quintus.pl -- Quintus compatibility
      • make.pl -- Reload modified source files
      • intercept.pl -- Intercept and signal interface
      • listing.pl -- List programs and pretty print clauses
      • ansi_term.pl -- Print decorated text to ANSI consoles
      • prolog_code.pl -- Utilities for reasoning about code
      • check.pl -- Consistency checking
      • xmldsig.pl -- XML Digital signature
      • date.pl -- Process dates and times
      • sort.pl
      • statistics.pl -- Get information about resource usage
      • snowball.pl -- The Snowball multi-lingual stemmer library
      • tty.pl -- Terminal operations
      • readline.pl -- GNU readline interface
      • prolog_stream.pl -- A stream with Prolog callbacks
      • writef.pl -- Old-style formatted write
      • udp_broadcast.pl -- A UDP broadcast proxy
      • codesio.pl -- I/O on Lists of Character Codes
      • help.pl -- Text based manual
      • prolog_stack.pl -- Examine the Prolog stack
      • terms.pl -- Term manipulation
      • prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
      • threadutil.pl -- Interactive thread utilities
      • shell.pl -- Elementary shell commands
      • prolog_history.pl -- Per-directory persistent commandline history
      • doc_files.pl -- Create stand-alone documentation files
      • pwp.pl -- Prolog Well-formed Pages
      • oset.pl -- Ordered set manipulation
      • prolog_wrap.pl -- Wrapping predicates
      • edit.pl -- Editor interface
      • c14n2.pl -- C14n2 canonical XML documents
      • xmlenc.pl -- XML encryption library
      • table.pl
      • explain.pl -- Describe Prolog Terms
      • base32.pl -- Base32 encoding and decoding
      • odbc.pl
      • isub.pl -- isub: a string similarity measure
      • yaml.pl -- Process YAML data
      • prolog_codewalk.pl -- Prolog code walker
      • prolog_metainference.pl -- Infer meta-predicate properties
      • hashtable.pl -- Hash tables
      • coinduction.pl -- Co-Logic Programming
      • paxos.pl -- A Replicated Data Store
      • prolog_autoload.pl -- Autoload all dependencies
      • prolog_trace.pl -- Print access to predicates
      • heaps.pl -- heaps/priority queues
      • varnumbers.pl -- Utilities for numbered terms
      • doc_latex.pl -- PlDoc LaTeX backend
      • zip.pl -- Access resource ZIP archives
      • cgi.pl -- Read CGI parameters
      • rlimit.pl
      • double_metaphone.pl -- Phonetic string matching
      • editline.pl -- BSD libedit based command line editing
      • tables.pl -- XSB interface to tables
      • qsave.pl -- Save current program as a state or executable
      • when.pl -- Conditional coroutining
      • test_cover.pl -- Clause cover analysis
      • wfs.pl -- Well Founded Semantics interface
      • win_menu.pl -- Console window menu
      • files.pl
      • protobufs.pl -- Google's Protocol Buffers
      • pdt_console.pl
      • term_to_json.pl
      • portray_text.pl -- Portray text
 bdb_open(+File, +Mode, -DB, +Options) is det
Open File holding a database. Mode is one of read, providing read-only access or update, providing read/write access. Options is a list of options. Supported options are below. The boolean options are passed as flags to DB->open(). The option name is derived from the flag name by stripping the DB_ prefix and converting to lower case. Consult the Berkeley DB documentation for details.
auto_commit(+Boolean)
Open the database in a transaction. Ensures no database is created in case of failure.
create(+Boolean)
Create a new database of the database does not exist.
dup(+Boolean)
Do/do not allow for duplicate values on the same key. Default is not to allow for duplicates.
excl(+Boolean)
Combined with create(true), fail if the database already exists.
multiversion(+Boolean)
Open the database with support for multiversion concurrency control. The flag is passed, but no further support is provided yet.
nommap(+Boolean)
Do not map this database into process memory.
rdonly(+Boolean)
Open the database for reading only.
read_uncommitted(+Boolean)
Read operations on the database may request the return of modified but not yet committed data. This flag must be specified on all DB handles used to perform dirty reads or database updates, otherwise requests for dirty reads may not be honored and the read may block.
thread(+Boolean)
Enable access to the database handle from multiple threads. This is default if the corresponding flag is specified for the environment.
truncate(+Boolean)
When specified, truncate the underlying file, i.e., start with an empty database.
database(+Name)
If File contains multiple databases, address the named database in the file. A DB file can only consist of multiple databases if the bdb_open/4 call that created it specified this argument. Each database in the file has its own characteristics.
environment(+Environment)
Specify a database environment created using bdb_init/2.
key(+Type)
value(+Type)
Specify the type of the key or value. Allowed values are:
term
Key/Value is a Prolog term (default). This type allows for representing arbitrary Prolog data in both keys and value. The representation is space-efficient, but Prolog specific. See PL_record_external() in the SWI-Prolog Reference Manual for details on the representation. The other representations are more neutral. This implies they are more stable and sharing the DB with other languages is feasible.
atom
Key/Value is an atom. The text is represented as a UTF-8 string and its length.
c_blob
Key/Value is a blob (sequence of bytes). On output, a Prolog string is used. The input is either a Prolog string or an atom holding only characters in the range [0..255].
c_string
Key/Value is an atom. The text is represented as a C 0-terminated UTF-8 string.
c_long
Key/Value is an integer. The value is represented as a native C long in machine byte-order.
Arguments:
DB- is unified with a blob of type db. Database handles are subject to atom garbage collection.
Errors
- permission_error(access, bdb_environment, Env) if an environment is not thread-enabled and accessed from multiple threads.
ClioPatria (version V3.1.1-40-g9d9e003)