contiki/apps/antelope/aql.h

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/*
* 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Definitions and declarations for AQL, the Antelope Query Language.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#ifndef AQL_H
#define AQL_H
#include "db-options.h"
#include "index.h"
#include "relation.h"
#include "result.h"
enum aql_status {
OK = 2,
SYNTAX_ERROR = 3,
INVALID_TOKEN = 9,
PLE_ERROR = 12
};
typedef enum aql_status aql_status_t;
#define AQL_ERROR(x) ((x) >= 3)
enum token {
END = 0,
LEFT_PAREN = 1,
RIGHT_PAREN = 2,
COMMA = 3,
EQUAL = 4,
GT = 5,
LT = 6,
DOT = 7,
ADD = 8,
SUB = 9,
MUL = 10,
DIV = 11,
COMMENT = 12,
GEQ = 13,
LEQ = 14,
NOT_EQUAL = 15,
ASSIGN = 16,
OR = 17,
IS = 18,
ON = 19,
IN = 20,
AND = 21,
NOT = 22,
SUM = 23,
MAX = 24,
MIN = 25,
INT = 26,
INTO = 27,
FROM = 28,
MEAN = 29,
JOIN = 30,
LONG = 31,
TYPE = 32,
WHERE = 33,
COUNT = 34,
INDEX = 35,
INSERT = 36,
SELECT = 37,
REMOVE = 38,
CREATE = 39,
MEDIAN = 40,
DOMAIN = 41,
STRING = 42,
INLINE = 43,
PROJECT = 44,
MAXHEAP = 45,
MEMHASH = 46,
RELATION = 47,
ATTRIBUTE = 48,
INTEGER_VALUE = 251,
FLOAT_VALUE = 252,
STRING_VALUE = 253,
IDENTIFIER = 254,
NONE = 255
};
typedef enum token token_t;
typedef char value_t[DB_MAX_ELEMENT_SIZE];
struct lexer {
const char *input;
const char *prev_pos;
token_t *token;
value_t *value;
};
typedef struct lexer lexer_t;
enum aql_aggregator {
AQL_NONE = 0,
AQL_COUNT = 1,
AQL_SUM = 2,
AQL_MIN = 3,
AQL_MAX = 4,
AQL_MEAN = 5,
AQL_MEDIAN = 6
};
typedef enum aql_aggregator aql_aggregator_t;
struct aql_attribute {
domain_t domain;
uint8_t element_size;
uint8_t flags;
char name[ATTRIBUTE_NAME_LENGTH + 1];
};
typedef struct aql_attribute aql_attribute_t;
struct aql_adt {
char relations[AQL_RELATION_LIMIT][RELATION_NAME_LENGTH + 1];
aql_attribute_t attributes[AQL_ATTRIBUTE_LIMIT];
aql_aggregator_t aggregators[AQL_ATTRIBUTE_LIMIT];
attribute_value_t values[AQL_ATTRIBUTE_LIMIT];
index_type_t index_type;
uint8_t relation_count;
uint8_t attribute_count;
uint8_t value_count;
uint8_t optype;
uint8_t flags;
void *lvm_instance;
};
typedef struct aql_adt aql_adt_t;
#define AQL_TYPE_NONE 0
#define AQL_TYPE_SELECT 1
#define AQL_TYPE_INSERT 2
#define AQL_TYPE_UPDATE 3
#define AQL_TYPE_DROP 4
#define AQL_TYPE_DELETE 5
#define AQL_TYPE_RENAME 6
#define AQL_TYPE_CREATE_ATTRIBUTE 7
#define AQL_TYPE_CREATE_INDEX 8
#define AQL_TYPE_CREATE_RELATION 9
#define AQL_TYPE_REMOVE_ATTRIBUTE 10
#define AQL_TYPE_REMOVE_INDEX 11
#define AQL_TYPE_REMOVE_RELATION 12
#define AQL_TYPE_REMOVE_TUPLES 13
#define AQL_TYPE_JOIN 14
#define AQL_FLAG_AGGREGATE 1
#define AQL_FLAG_ASSIGN 2
#define AQL_FLAG_INVERSE_LOGIC 4
#define AQL_CLEAR(adt) aql_clear(adt)
#define AQL_SET_TYPE(adt, type) (((adt))->optype = (type))
#define AQL_GET_TYPE(adt) ((adt)->optype)
#define AQL_SET_INDEX_TYPE(adt, type) ((adt)->index_type = (type))
#define AQL_GET_INDEX_TYPE(adt) ((adt)->index_type)
#define AQL_SET_FLAG(adt, flag) (((adt)->flags) |= (flag))
#define AQL_GET_FLAGS(adt) ((adt)->flags)
#define AQL_ADD_RELATION(adt, rel) \
strcpy((adt)->relations[(adt)->relation_count++], (rel))
#define AQL_RELATION_COUNT(adt) ((adt)->relation_count)
#define AQL_ADD_ATTRIBUTE(adt, attr, dom, size) \
aql_add_attribute(adt, attr, dom, size, 0)
#define AQL_ADD_PROCESSING_ATTRIBUTE(adt, attr) \
aql_add_attribute((adt), (attr), DOMAIN_UNSPECIFIED, 0, 1)
#define AQL_ADD_AGGREGATE(adt, function, attr) \
do { \
(adt)->aggregators[(adt)->attribute_count] = (function); \
aql_add_attribute((adt), (attr), DOMAIN_UNSPECIFIED, 0, 0); \
} while(0)
#define AQL_ATTRIBUTE_COUNT(adt) ((adt)->attribute_count)
#define AQL_SET_CONDITION(adt, cond) ((adt)->lvm_instance = (cond))
#define AQL_ADD_VALUE(adt, domain, value) \
aql_add_value((adt), (domain), (value))
int lexer_start(lexer_t *, char *, token_t *, value_t *);
int lexer_next(lexer_t *);
void lexer_rewind(lexer_t *);
void aql_clear(aql_adt_t *adt);
aql_status_t aql_parse(aql_adt_t *adt, char *query_string);
db_result_t aql_add_attribute(aql_adt_t *adt, char *name,
domain_t domain, unsigned element_size,
int processed_only);
db_result_t aql_add_value(aql_adt_t *adt, domain_t domain, void *value);
db_result_t db_query(db_handle_t *handle, const char *format, ...);
db_result_t db_process(db_handle_t *handle);
#endif /* !AQL_H */