80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* \file
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* Declarations for the result acquisition API.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#ifndef RESULT_H
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#define RESULT_H
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#include "index.h"
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#include "relation.h"
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#include "storage.h"
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#define RESULT_TUPLE_INVALID(tuple) ((tuple) == NULL)
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#define RESULT_TUPLE_SIZE(handle) (handle).rel->row_length
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typedef unsigned char *tuple_t;
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#define DB_HANDLE_FLAG_INDEX_STEP 0x01
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#define DB_HANDLE_FLAG_SEARCH_INDEX 0x02
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#define DB_HANDLE_FLAG_PROCESSING 0x04
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struct db_handle {
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index_iterator_t index_iterator;
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tuple_id_t tuple_id;
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tuple_id_t current_row;
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relation_t *rel;
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relation_t *left_rel;
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relation_t *join_rel;
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relation_t *right_rel;
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relation_t *result_rel;
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attribute_t *left_join_attr;
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attribute_t *right_join_attr;
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tuple_t tuple;
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uint8_t flags;
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uint8_t ncolumns;
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void *adt;
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};
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typedef struct db_handle db_handle_t;
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db_result_t db_get_value(attribute_value_t *value,
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db_handle_t *handle, unsigned col);
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db_result_t db_phy_to_value(attribute_value_t *value,
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attribute_t *attr, unsigned char *ptr);
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db_result_t db_value_to_phy(unsigned char *ptr,
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attribute_t *attr, attribute_value_t *value);
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long db_value_to_long(attribute_value_t *value);
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db_result_t db_free(db_handle_t *handle);
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#endif /* !RESULT_H */
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