[DOCS] SQL standard for TRUNCATE

According to http://www.postgresql.org/docs/9.1/static/unsupported-features-sql-standard.html, PostgreSQL doesn't support identity column restart for TRUNCATE. This might strictly be true because PostgreSQL doesn't implement identity columns as such, but it does support RESTART IDENTITY and CONTIN

Re: [DOCS] SQL standard for TRUNCATE

Thom Brown writes: > According to > http://www.postgresql.org/docs/9.1/static/unsupported-features-sql-standard.html, > PostgreSQL doesn't support identity column restart for TRUNCATE. This > might strictly be true because PostgreSQL doesn't implement identity > columns as such, but it does suppo