# Pastebin FP0bGeiT
➜  Red git:(master) raku -I. -e '       

use Red;

model BBB {
    has Int $.id is serial;
    has Str $.a1 is unique<a b>;
    has Str $.a2 is unique<a b c d>;
    has Str $.a3 is unique<a>;
}

red-defaults "SQLite";

my $*RED-DEBUG = True;

BBB.^create-table

'
SQL : CREATE TABLE b_b_b(
   id integer NOT NULL primary key AUTOINCREMENT,
   a1 varchar(255) NOT NULL ,
   a2 varchar(255) NOT NULL ,
   a3 varchar(255) NOT NULL ,
   UNIQUE (a2),
   UNIQUE (a2),
   UNIQUE (a1, a2),
   UNIQUE (a1, a2, a3)
)
BIND: []