dbcolumns.c File Reference

Vector library - DB info on vectors maps. More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <grass/glocale.h>
#include <grass/vector.h>
#include <grass/dbmi.h>

Include dependency graph for dbcolumns.c:

Go to the source code of this file.

Macros
#define	BUFF_MAX   2000

Functions
const char *	Vect_get_column_names (struct Map_info *Map, int field)
	Fetches list of DB column names of vector map attribute table.
const char *	Vect_get_column_types (struct Map_info *Map, int field)
	Fetches list of DB column types of vector map attribute table.
const char *	Vect_get_column_names_types (struct Map_info *Map, int field)
	Fetches list of DB column names and types of vector map attribute table.

Detailed Description

Vector library - DB info on vectors maps.

Higher level functions for reading/writing/manipulating vectors.

(C) 2005-2009 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

Markus Neteler

Definition in file dbcolumns.c.

Macro Definition Documentation

BUFF_MAX

#define BUFF_MAX   2000

Definition at line 26 of file dbcolumns.c.

Function Documentation

Vect_get_column_names()

const char * Vect_get_column_names	(	struct Map_info *	Map,
		int	field
	)

Fetches list of DB column names of vector map attribute table.

Parameters

Map	vector map
field	layer number

Returns

list of column(s) names on success

NULL on error

Definition at line 37 of file dbcolumns.c.

References BUFF_MAX, field_info::database, db_close_database_shutdown_driver(), db_describe_table(), db_get_column_name(), db_get_table_column(), db_get_table_number_of_columns(), db_init_handle(), db_init_string(), DB_OK, db_open_database(), db_set_handle(), db_set_string(), db_shutdown_driver(), db_start_driver(), field_info::driver, G_debug(), G_free(), G_malloc, G_store(), G_str_concat(), NULL, field_info::table, Vect_destroy_field_info(), Vect_get_field(), and Vect_get_num_dblinks().

Vect_get_column_names_types()

const char * Vect_get_column_names_types	(	struct Map_info *	Map,
		int	field
	)

Fetches list of DB column names and types of vector map attribute table.

Parameters

Map	vector map
field	layer number

Returns

list of column(s) types on success

NULL on error

Definition at line 163 of file dbcolumns.c.

References BUFF_MAX, field_info::database, db_close_database_shutdown_driver(), db_describe_table(), db_get_column_name(), db_get_column_sqltype(), db_get_table_column(), db_get_table_number_of_columns(), db_init_handle(), db_init_string(), DB_OK, db_open_database(), db_set_handle(), db_set_string(), db_shutdown_driver(), db_sqltype_name(), db_start_driver(), field_info::driver, G_calloc, G_debug(), G_free(), G_malloc, G_store(), G_str_concat(), NULL, field_info::table, Vect_destroy_field_info(), Vect_get_field(), and Vect_get_num_dblinks().

Vect_get_column_types()

const char * Vect_get_column_types	(	struct Map_info *	Map,
		int	field
	)

Fetches list of DB column types of vector map attribute table.

Parameters

Map	vector map
field	layer number

Returns

list of column(s) types on success

NULL on error

Definition at line 99 of file dbcolumns.c.

References BUFF_MAX, field_info::database, db_close_database_shutdown_driver(), db_describe_table(), db_get_column_sqltype(), db_get_table_column(), db_get_table_number_of_columns(), db_init_handle(), db_init_string(), DB_OK, db_open_database(), db_set_handle(), db_set_string(), db_shutdown_driver(), db_sqltype_name(), db_start_driver(), field_info::driver, G_debug(), G_free(), G_malloc, G_store(), G_str_concat(), NULL, field_info::table, Vect_destroy_field_info(), Vect_get_field(), and Vect_get_num_dblinks().