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/*!
\file db/driver/postgres/index.c
\brief DBMI - Low Level PostgreSQL database driver - index management
\todo implement time zone handling
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Radim Blazek
*/
#include <grass/dbmi.h>
#include <grass/glocale.h>
#include "globals.h"
#include "proto.h"
int db__driver_create_index(dbIndex *index)
{
int i, ncols;
PGresult *res;
dbString sql;
G_debug(3, "db__create_index()");
db_init_string(&sql);
ncols = db_get_index_number_of_columns(index);
db_set_string(&sql, "create");
if (db_test_index_type_unique(index))
db_append_string(&sql, " unique");
db_append_string(&sql, " index ");
if (PQserverVersion(pg_conn) >= 90500)
db_append_string(&sql, "if not exists ");
db_append_string(&sql, db_get_index_name(index));
db_append_string(&sql, " on ");
db_append_string(&sql, db_get_index_table_name(index));
db_append_string(&sql, " ( ");
for (i = 0; i < ncols; i++) {
if (i > 0)
db_append_string(&sql, ", ");
db_append_string(&sql, db_get_index_column_name(index, i));
}
db_append_string(&sql, " )");
G_debug(3, " SQL: %s", db_get_string(&sql));
res = PQexec(pg_conn, db_get_string(&sql));
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
db_d_append_error("%s: %s\n%s", _("Unable to create index"),
db_get_string(&sql), PQerrorMessage(pg_conn));
db_d_report_error();
PQclear(res);
db_free_string(&sql);
return DB_FAILED;
}
PQclear(res);
db_free_string(&sql);
return DB_OK;
}
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