The grammar of Invantive UniversalSQL is available at:
[SQL Grammar](https://cloud.invantive.com/sql-grammar/invantive-sql-grammar-current.html)
```ebnf
test ::= test2
test2 ::= 'hoi'
```
```mermaid
flowchart LR
select_stmt["select-statement"] --> kw_select["'select'"]
kw_select --> select_list["select-list"]
select_list --> kw_from["'from'"]
kw_from --> table_name["table-name"]
select_list --> all_cols["'*'"]
select_list --> first_col["column-name"]
first_col --> more_cols["0..n × ',' + column-name"]
```