103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2010, Swedish Institute of Computer Science
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file
|
||
|
|
* .
|
||
|
|
* \author
|
||
|
|
* Nicolas Tsiftes <nvt@sics.se>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef RELATION_H
|
||
|
|
#define RELATION_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
#include "lib/list.h"
|
||
|
|
|
||
|
|
#include "attribute.h"
|
||
|
|
#include "db-options.h"
|
||
|
|
#include "db-types.h"
|
||
|
|
|
||
|
|
typedef uint32_t tuple_id_t;
|
||
|
|
#define INVALID_TUPLE (tuple_id_t)-1
|
||
|
|
|
||
|
|
typedef enum db_direction {
|
||
|
|
DB_MEMORY = 0,
|
||
|
|
DB_STORAGE = 1
|
||
|
|
} db_direction_t;
|
||
|
|
|
||
|
|
#define RELATION_HAS_TUPLES(rel) ((rel)->tuple_storage >= 0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A relation consists of a name, a set of domains, a set of indexes,
|
||
|
|
* and a set of keys. Each relation must have a primary key.
|
||
|
|
*/
|
||
|
|
struct relation {
|
||
|
|
struct relation *next;
|
||
|
|
LIST_STRUCT(attributes);
|
||
|
|
attribute_t *primary_key;
|
||
|
|
size_t row_length;
|
||
|
|
attribute_id_t attribute_count;
|
||
|
|
tuple_id_t cardinality;
|
||
|
|
tuple_id_t next_row;
|
||
|
|
db_storage_id_t tuple_storage;
|
||
|
|
db_direction_t dir;
|
||
|
|
uint8_t references;
|
||
|
|
char name[RELATION_NAME_LENGTH + 1];
|
||
|
|
char tuple_filename[RELATION_NAME_LENGTH + 1];
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef struct relation relation_t;
|
||
|
|
|
||
|
|
/* API for relations. */
|
||
|
|
db_result_t relation_init(void);
|
||
|
|
db_result_t relation_process_remove(void *);
|
||
|
|
db_result_t relation_process_select(void *);
|
||
|
|
db_result_t relation_process_join(void *);
|
||
|
|
relation_t *relation_load(char *);
|
||
|
|
db_result_t relation_release(relation_t *);
|
||
|
|
relation_t *relation_create(char *, db_direction_t);
|
||
|
|
db_result_t relation_rename(char *, char *);
|
||
|
|
attribute_t *relation_attribute_add(relation_t *, db_direction_t, char *,
|
||
|
|
domain_t, size_t);
|
||
|
|
attribute_t *relation_attribute_get(relation_t *, char *);
|
||
|
|
db_result_t relation_get_value(relation_t *, attribute_t *,
|
||
|
|
unsigned char *, attribute_value_t *);
|
||
|
|
db_result_t relation_attribute_remove(relation_t *, char *);
|
||
|
|
db_result_t relation_set_primary_key(relation_t *, char *);
|
||
|
|
db_result_t relation_remove(char *, int);
|
||
|
|
db_result_t relation_insert(relation_t *, attribute_value_t *);
|
||
|
|
db_result_t relation_select(void *, relation_t *, void *);
|
||
|
|
db_result_t relation_join(void *, void *);
|
||
|
|
tuple_id_t relation_cardinality(relation_t *);
|
||
|
|
|
||
|
|
#endif /* RELATION_H */
|