ham_record_filter_t Struct Reference

#include <hamsterdb_int.h>

Data Fields
void *	userdata
ham_record_filter_before_insert_cb_t	before_insert_cb
ham_record_filter_after_read_cb_t	after_read_cb
ham_record_filter_close_cb_t	close_cb
ham_u32_t	_flags
ham_record_filter_t *	_next
ham_record_filter_t *	_prev

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Detailed Description

A handle for record-level filtering

Record-level filters can modify and resize the record data before the record is inserted, and before it is returned to the user.

Record-level filters can be used for example for writing compression filters. See ham_enable_compression() to create a filter for zlib-based compression.

Each of the three callback functions can be NULL.

Before this structure is used, it has to be initialized with zeroes.

Definition at line 200 of file hamsterdb_int.h.

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Field Documentation

void* ham_record_filter_t::userdata

The user data

Definition at line 203 of file hamsterdb_int.h.

ham_record_filter_before_insert_cb_t ham_record_filter_t::before_insert_cb

The function which is called before the record is inserted

Definition at line 206 of file hamsterdb_int.h.

ham_record_filter_after_read_cb_t ham_record_filter_t::after_read_cb

The function which is called after the record is read from disk

Definition at line 209 of file hamsterdb_int.h.

ham_record_filter_close_cb_t ham_record_filter_t::close_cb

The function which is when the Database is closed

Definition at line 212 of file hamsterdb_int.h.

ham_u32_t ham_record_filter_t::_flags

For internal use

Definition at line 215 of file hamsterdb_int.h.

ham_record_filter_t* ham_record_filter_t::_next

For internal use

Definition at line 218 of file hamsterdb_int.h.

ham_record_filter_t * ham_record_filter_t::_prev

Definition at line 218 of file hamsterdb_int.h.

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The documentation for this struct was generated from the following file:

• include/ham/hamsterdb_int.h