truncate-issue.md

I don't think TRUNCATE's CASCADE clause works (or if it does, it doesn't work like Postgres).

> CREATE TABLE reftbl (id INT PRIMARY KEY);
CREATE TABLE

> INSERT INTO reftbl VALUES (1);
INSERT 1

> CREATE TABLE fktbl (id INT REFERENCES reftbl, INDEX (id));
CREATE TABLE

> INSERT INTO fktbl VALUES (1);
INSERT 1

> TRUNCATE reftbl CASCADE;
pq: foreign key violation: non-empty columns [id] referenced in table "fktbl"