GRASS GIS 7 Programmer's Manual  7.9.dev(2021)-e5379bbd7
c_drop_col.c
Go to the documentation of this file.
1 /*!
2  * \file db/dbmi_client/c_drop_col.c
3  *
4  * \brief DBMI Library (client) - drop column
5  *
6  * (C) 1999-2008 by the GRASS Development Team
7  *
8  * This program is free software under the GNU General Public
9  * License (>=v2). Read the file COPYING that comes with GRASS
10  * for details.
11  *
12  * \author Joel Jones (CERL/UIUC), Radim Blazek
13  */
14 
15 #include <grass/dbmi.h>
16 #include "macros.h"
17 
18 /*!
19  \brief Drop column
20 
21  \param driver db driver
22  \param tableName table name
23  \param columnName column name to be dropped
24 
25  \return DB_OK on success
26  \return DB_FAILED on failure
27  */
28 int db_drop_column(dbDriver * driver, dbString * tableName, dbString * columnName)
29 {
30  int ret_code;
31 
32  /* start the procedure call */
33  db__set_protocol_fds(driver->send, driver->recv);
35 
36  /* send the argument(s) to the procedure */
37  DB_SEND_STRING(tableName);
38  DB_SEND_STRING(columnName);
39 
40  /* get the return code for the procedure call */
41  DB_RECV_RETURN_CODE(&ret_code);
42 
43  if (ret_code != DB_OK)
44  return ret_code; /* ret_code SHOULD == DB_FAILED */
45 
46  /* no results */
47  return DB_OK;
48 }
int db_drop_column(dbDriver *driver, dbString *tableName, dbString *columnName)
Drop column.
Definition: c_drop_col.c:28
#define DB_START_PROCEDURE_CALL(x)
Definition: macros.h:2
#define DB_RECV_RETURN_CODE(x)
Definition: macros.h:4
#define DB_SEND_STRING(x)
Definition: macros.h:12
Definition: driver.h:22
FILE * recv
Definition: dbmi.h:171
void db__set_protocol_fds(FILE *, FILE *)
?
FILE * send
Definition: dbmi.h:171
#define DB_OK
Definition: dbmi.h:71
#define DB_PROC_DROP_COLUMN
Definition: dbmi.h:58