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c_openselect.c
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c_openselect.c
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/*!
\file db/dbmi_client/c_openselect.c
\brief DBMI Library (client) - open select cursor
(C) 1999-2008, 2012 by the GRASS Development Team
This program is free software under the GNU General Public
License (>=v2). Read the file COPYING that comes with GRASS
for details.
\author Joel Jones (CERL/UIUC)
\author Radim Blazek
*/
#include <grass/dbmi.h>
#include "macros.h"
/*!
\brief Open select cursor
Open modes:
- DB_SEQUENTIAL
Data can be fetched by db_fetch().
Cursor should be closed by db_close_cursor().
\param driver pointer to dbDriver
\param select SQL select statement (pointer to dbString)
\param cursor pointer to dbCursor to be opened
\param mode open mode
\return DB_OK on success
\return DB_FAILED on failure
*/
int db_open_select_cursor(dbDriver * driver, dbString * select, dbCursor * cursor,
int mode)
{
int ret_code;
db_init_cursor(cursor);
cursor->driver = driver;
/* start the procedure call */
db__set_protocol_fds(driver->send, driver->recv);
DB_START_PROCEDURE_CALL(DB_PROC_OPEN_SELECT_CURSOR);
/* send the argument(s) to the procedure */
DB_SEND_STRING(select);
DB_SEND_INT(mode);
/* get the return code for the procedure call */
DB_RECV_RETURN_CODE(&ret_code);
if (ret_code != DB_OK)
return ret_code; /* ret_code SHOULD == DB_FAILED */
/* get the results */
DB_RECV_TOKEN(&cursor->token);
DB_RECV_INT(&cursor->type);
DB_RECV_INT(&cursor->mode);
DB_RECV_TABLE_DEFINITION(&cursor->table);
return DB_OK;
}