}
{
- int ver_num;
+ int ver_num = 0;
const char *vers = PQparameterStatus (r->conn, "server_version");
sscanf (vers, "%d", &ver_num);
*dict = r->dict = dict_create (encoding);
}
+ const int version = PQserverVersion (r->conn);
+ ds_init_empty (&query);
/*
- select count (*) from (select * from medium) stupid_sql_standard;
- */
- ds_init_cstr (&query,
- "BEGIN READ ONLY ISOLATION LEVEL SERIALIZABLE; "
- "DECLARE pspp BINARY CURSOR FOR ");
+ Versions before 9.1 don't have the REPEATABLE READ isolation level.
+ However according to <a12321aabb@gmail.com> if the server is in the
+ "hot standby" mode then SERIALIZABLE won't work.
+ */
+ ds_put_c_format (&query,
+ "BEGIN READ ONLY ISOLATION LEVEL %s; "
+ "DECLARE pspp BINARY CURSOR FOR ",
+ (version < 90100) ? "SERIALIZABLE" : "REPEATABLE READ");
ds_put_substring (&query, info->sql.ss);