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#include <stdlib.h>
#include <string.h>
#include <gis.h>
#include <dbmi.h>
#include "globals.h"
#include "proto.h"
int db__driver_open_database(handle)
dbHandle *handle;
{
char *name, *schema, *user, *password, buf[500];
dbConnection connection;
PGCONN pgconn;
PGresult *res;
int row;
init_error();
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 ) {
report_error();
return DB_FAILED;
}
G_debug(3, "host = %s, port = %s, options = %s, tty = %s, dbname = %s, user = %s, password = %s, "
"schema = %s", pgconn.host, pgconn.port, pgconn.options, pgconn.tty,
pgconn.dbname, pgconn.user, pgconn.password, pgconn.schema );
db_get_login ( "pg", name, &user, &password );
pg_conn = PQsetdbLogin( pgconn.host, pgconn.port, pgconn.options, pgconn.tty,
pgconn.dbname, user, password );
free ( user );
free ( password );
if (PQstatus(pg_conn) == CONNECTION_BAD) {
append_error ( "Cannot connect to Postgres: " );
append_error ( PQerrorMessage(pg_conn) );
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;
}
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) {
append_error ( "Cannot set schema: " );
append_error ( schema );
report_error();
PQclear(res);
return DB_FAILED;
}
}
/* Read internal codes */
res = PQexec(pg_conn, "select oid, typname from pg_type where typname in ( "
"'int2', 'int4', 'int8', 'serial', 'oid', "
"'float4', 'float8', 'numeric', "
"'char', 'bpchar', 'varchar', 'text', "
"'time', 'date', 'timestamp', "
"'bool' ) order by oid" );
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK) {
append_error ( "Cannot select data types" );
report_error();
PQclear(res);
return DB_FAILED;
}
pg_ntypes = PQntuples(res);
pg_types = (int *) 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;
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
type = PG_TYPE_UNKNOWN;
G_debug ( 3, "pgtype = %d, \tname = %s -> \ttype = %d", pgtype, PQgetvalue(res, row, 1), type );
pg_types[row][1] = type;
}
PQclear(res);
return DB_OK;
}
int db__driver_close_database()
{
init_error();
PQfinish(pg_conn);
return DB_OK;
}
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