The functions and interfaces applications use to customize and extend the behavior of WiredTiger. More...

Classes
struct	WT_COLLATOR
	The interface implemented by applications to provide custom ordering of records. More...

struct	WT_COMPRESSOR
	The interface implemented by applications to provide custom compression. More...

struct	WT_DATA_SOURCE
	Applications can extend WiredTiger by providing new implementations of the WT_DATA_SOURCE class. More...

struct	WT_EXTRACTOR
	The interface implemented by applications to provide custom extraction of index keys or column group values. More...

struct	WT_TXN_NOTIFY
	Snapshot isolation level, returned by WT_EXTENSION_API::transaction_isolation_level. More...

struct	WT_EXTENSION_API
	Table of WiredTiger extension methods. More...

struct	WT_CONFIG_ITEM
	The configuration information returned by the WiredTiger extension function WT_EXTENSION_API::config_get. More...

Macros
#define	WT_TXN_ISO_READ_COMMITTED
	Read-committed isolation level, returned by WT_EXTENSION_API::transaction_isolation_level.

#define	WT_TXN_ISO_READ_UNCOMMITTED
	Read-uncommitted isolation level, returned by WT_EXTENSION_API::transaction_isolation_level.

#define	WT_TXN_ISO_SNAPSHOT
	Snapshot isolation level, returned by WT_EXTENSION_API::transaction_isolation_level.

Typedefs
typedef struct WT_CONFIG_ARG	WT_CONFIG_ARG
	A configuration object passed to some extension interfaces. More...

typedef struct WT_CONFIG_SCAN	WT_CONFIG_SCAN
	A handle for a scan through a configuration string. More...

Functions
int	wiredtiger_extension_init (WT_CONNECTION connection, WT_CONFIG_ARG config)
	Entry point to an extension, called when the extension is loaded. More...

int	wiredtiger_extension_terminate (WT_CONNECTION *connection)
	Optional cleanup function for an extension, called during WT_CONNECTION::close. More...

Detailed Description

The functions and interfaces applications use to customize and extend the behavior of WiredTiger.

Class Documentation

struct WT_CONFIG_ITEM

The configuration information returned by the WiredTiger extension function WT_EXTENSION_API::config_get.

Class Members
	__unnamed__	Permitted values of the `type` field.

Class Members
size_t	len	The number of bytes in the value referenced by `str`.
const char *	str	The value of a configuration string. Regardless of the type of the configuration string (boolean, int, list or string), the `str` field will reference the value of the configuration string. The bytes referenced by `str` are not be nul-terminated, use the `len` field instead of a terminating nul byte.
enum WT_CONFIG_ITEM	type	Permitted values of the `type` field. The type of value determined by the parser. In all cases, the `str` and `len` fields are set.
int64_t	val	The value of a configuration boolean or integer. If the configuration string's value is "true" or "false", the `val` field will be set to 1 (true), or 0 (false). If the configuration string can be legally interpreted as an integer, using the strtoll function rules as specified in ISO/IEC 9899:1990 ("ISO C90"), that integer will be stored in the `val` field.

A configuration object passed to some extension interfaces.

This is an opaque type: configuration values can be queried using WT_EXTENSION_API::config_get.

A handle for a scan through a configuration string.

This is an opaque type returned by WT_EXTENSION_API::config_scan_begin. Configuration values can be queried using WT_EXTENSION_API::config_scan_next. Call WT_EXTENSION_API::config_scan_end when finished to release resources.

int wiredtiger_extension_init	(	WT_CONNECTION *	connection,
		WT_CONFIG_ARG *	config
	)

Entry point to an extension, called when the extension is loaded.

Parameters

connection	the connection handle
config	the config information passed to WT_CONNECTION::load_extension

Returns: zero on success and a non-zero error code on failure. See Error Returns for details.

int wiredtiger_extension_terminate ( WT_CONNECTION * connection)

Optional cleanup function for an extension, called during WT_CONNECTION::close.

Parameters

connection the connection handle

Returns: zero on success and a non-zero error code on failure. See Error Returns for details.