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/*!
\file db/driver/postgres/db.c
\brief DBMI - Low Level PostgreSQL database driver - open/close database.
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
\author Create/drop database by Martin Landa <landa.martin gmail.com>
*/
#include <stdlib.h>
#include <string.h>
#include <grass/dbmi.h>
#include <grass/gis.h>
#include <grass/glocale.h>
#include "globals.h"
#include "proto.h"
static void notice_processor(void *arg UNUSED, const char *message)
{
/* print notice messages only on verbose level */
if (G_verbose() > G_verbose_std()) {
fprintf(stderr, "%s", message);
}
}
static int create_delete_db(dbHandle *, int);
int db__driver_open_database(dbHandle *handle)
{
char buf[500];
const char *name, *schema, *user, *password, *host, *port;
dbConnection connection;
PGCONN pgconn;
PGresult *res;
int row;
db_get_connection(&connection);
name = db_get_handle_dbname(handle);
/* if name is empty use connection.databaseName */
if (strlen(name) == 0)
name = connection.databaseName;
G_debug(3,
"db_driver_open_database(): driver=pg database definition = '%s'",
name);
if (parse_conn(name, &pgconn) == DB_FAILED) {
db_d_report_error();
return DB_FAILED;
}
db_get_login2("pg", name, &user, &password, &host, &port);
pg_conn = PQsetdbLogin(host, port, pgconn.options, pgconn.tty,
pgconn.dbname, user, password);
G_debug(3,
"db_driver_open_database(): host = %s, port = %s, options = %s, "
"tty = %s, "
"dbname = %s, user = %s, password = %s "
"schema = %s",
host, port, pgconn.options, pgconn.tty, pgconn.dbname, user,
password, pgconn.schema);
if (PQstatus(pg_conn) == CONNECTION_BAD) {
db_d_append_error("%s\n%s", _("Connection failed."),
PQerrorMessage(pg_conn));
db_d_report_error();
PQfinish(pg_conn);
return DB_FAILED;
}
/* set schema */
schema = db_get_handle_dbschema(handle);
/* Cannot use default schema because link to table can point to
different database */
/*
if ( schema )
schema = connection.schemaName;
*/
if (pgconn.schema) {
schema = pgconn.schema;
}
/* set path to the schema */
if (schema && strlen(schema) > 0) {
sprintf(buf, "set search_path to %s", schema);
res = PQexec(pg_conn, buf);
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
db_d_append_error("%s %s", _("Unable to set schema:"), schema);
db_d_report_error();
PQclear(res);
return DB_FAILED;
}
}
/* read internal codes */
res = PQexec(pg_conn, "select oid, typname from pg_type where typname in ( "
"'bit', 'int2', 'int4', 'int8', 'serial', 'oid', "
"'float4', 'float8', 'numeric', "
"'char', 'bpchar', 'varchar', 'text', "
"'time', 'date', 'timestamp', "
"'bool', 'geometry', 'topogeometry') order by oid");
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK) {
db_d_append_error(_("Unable to select data types"));
db_d_report_error();
PQclear(res);
return DB_FAILED;
}
pg_ntypes = PQntuples(res);
pg_types = G_realloc(pg_types, 2 * pg_ntypes * sizeof(int));
for (row = 0; row < pg_ntypes; row++) {
int pgtype, type;
pgtype = atoi(PQgetvalue(res, row, 0));
pg_types[row][0] = pgtype;
G_debug(3, "row = %d value = %s", row, PQgetvalue(res, row, 1));
if (strcmp(PQgetvalue(res, row, 1), "bit") == 0)
type = PG_TYPE_BIT;
else if (strcmp(PQgetvalue(res, row, 1), "int2") == 0)
type = PG_TYPE_INT2;
else if (strcmp(PQgetvalue(res, row, 1), "int4") == 0)
type = PG_TYPE_INT4;
else if (strcmp(PQgetvalue(res, row, 1), "int8") == 0)
type = PG_TYPE_INT8;
else if (strcmp(PQgetvalue(res, row, 1), "serial") == 0)
type = PG_TYPE_SERIAL;
else if (strcmp(PQgetvalue(res, row, 1), "oid") == 0)
type = PG_TYPE_OID;
else if (strcmp(PQgetvalue(res, row, 1), "float4") == 0)
type = PG_TYPE_FLOAT4;
else if (strcmp(PQgetvalue(res, row, 1), "float8") == 0)
type = PG_TYPE_FLOAT8;
else if (strcmp(PQgetvalue(res, row, 1), "numeric") == 0)
type = PG_TYPE_NUMERIC;
else if (strcmp(PQgetvalue(res, row, 1), "char") == 0)
type = PG_TYPE_CHAR;
else if (strcmp(PQgetvalue(res, row, 1), "bpchar") == 0)
type = PG_TYPE_BPCHAR;
else if (strcmp(PQgetvalue(res, row, 1), "varchar") == 0)
type = PG_TYPE_VARCHAR;
else if (strcmp(PQgetvalue(res, row, 1), "text") == 0)
type = PG_TYPE_TEXT;
else if (strcmp(PQgetvalue(res, row, 1), "date") == 0)
type = PG_TYPE_DATE;
else if (strcmp(PQgetvalue(res, row, 1), "time") == 0)
type = PG_TYPE_TIME;
else if (strcmp(PQgetvalue(res, row, 1), "timestamp") == 0)
type = PG_TYPE_TIMESTAMP;
else if (strcmp(PQgetvalue(res, row, 1), "bool") == 0)
type = PG_TYPE_BOOL;
else if (strcmp(PQgetvalue(res, row, 1), "geometry") == 0)
type = PG_TYPE_POSTGIS_GEOM;
else if (strcmp(PQgetvalue(res, row, 1), "topogeometry") == 0)
type = PG_TYPE_POSTGIS_TOPOGEOM;
else
type = PG_TYPE_UNKNOWN;
G_debug(
3, "db_driver_open_database(): pgtype = %d, name = %s -> type = %d",
pgtype, PQgetvalue(res, row, 1), type);
pg_types[row][1] = type;
}
/* print notice messages only on verbose level */
PQsetNoticeProcessor(pg_conn, notice_processor, NULL);
PQclear(res);
return DB_OK;
}
int db__driver_close_database(void)
{
PQfinish(pg_conn);
return DB_OK;
}
/*!
\brief Create new empty PostgreSQL database.
\param handle dbHandle
\return DB_OK on success
\return DB_FAILED on failure
*/
int db__driver_create_database(dbHandle *handle)
{
return create_delete_db(handle, TRUE);
}
/*!
\brief Drop existing PostgreSQL database.
\param handle dbHandle
\return DB_OK on success
\return DB_FAILED on failure
*/
int db__driver_delete_database(dbHandle *handle)
{
return create_delete_db(handle, FALSE);
}
/* create or drop database */
int create_delete_db(dbHandle *handle, int create)
{
dbString stmt;
const char *template_db, *name, *user, *password, *host, *port;
PGCONN pgconn;
PGresult *res;
db_init_string(&stmt);
template_db = "template1";
name = db_get_handle_dbname(handle); /* database to create */
if (parse_conn(template_db, &pgconn) == DB_FAILED) {
db_d_report_error();
return DB_FAILED;
}
G_debug(3,
"db_driver_create_database(): host = %s, port = %s, options = %s, "
"tty = %s, "
"dbname = %s, user = %s, password = %s, host = %s, port = %s"
"schema = %s",
pgconn.host, pgconn.port, pgconn.options, pgconn.tty, pgconn.dbname,
pgconn.user, pgconn.password, pgconn.host, pgconn.port,
pgconn.schema);
db_get_login2("pg", template_db, &user, &password, &host, &port);
pg_conn = PQsetdbLogin(host, port, pgconn.options, pgconn.tty,
pgconn.dbname, user, password);
if (PQstatus(pg_conn) == CONNECTION_BAD) {
db_d_append_error(_("Connection failed."));
db_d_append_error("\n");
db_d_append_error("%s", PQerrorMessage(pg_conn));
db_d_report_error();
PQfinish(pg_conn);
return DB_FAILED;
}
/* create new database */
if (create)
db_set_string(&stmt, "CREATE DATABASE ");
else
db_set_string(&stmt, "DROP DATABASE ");
db_append_string(&stmt, name);
res = PQexec(pg_conn, db_get_string(&stmt));
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
if (create)
db_d_append_error(_("Unable to create database <%s>"), name);
else
db_d_append_error(_("Unable to drop database <%s>"), name);
db_d_append_error("\n");
db_d_append_error("%s", PQerrorMessage(pg_conn));
db_d_report_error();
PQclear(res);
PQfinish(pg_conn);
return DB_FAILED;
}
PQclear(res);
PQfinish(pg_conn);
return DB_OK;
}
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