c_openupdate.c

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/*!
 * \file db/dbmi_client/c_openupdate.c
 *
 * \brief DBMI Library (client) - open update cursor
 *
 * (C) 1999-2008 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), Radim Blazek
 */
 
#include <grass/dbmi.h>
#include "macros.h"
 
/*!
   \brief Open update cursor
 
   \param driver db driver
   \param table_name table name
   \param select SQL update statement (?)
   \param cursor db cursor to be opened
   \param mode open mode (?)
 
   \return DB_OK on success
   \return DB_FAILED on failure
 */
int db_open_update_cursor(dbDriver *driver, dbString *table_name,
                          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_UPDATE_CURSOR);
 
    /* send the argument(s) to the procedure */
    DB_SEND_STRING(table_name);
    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);
    db_alloc_cursor_column_flags(cursor);
    return DB_OK;
}