Actually, Postgres has had an Array data type since at least v8.0. http://www.po... | Hacker News

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		dstorrs on June 5, 2012 \| parent \| context \| favorite \| on: Building a MongoDB Clone in Postgres Actually, Postgres has had an Array data type since at least v8.0. http://www.postgresql.org/docs/8.0/static/arrays.html But yes, you're right that maps require a join table.

masklinn on June 5, 2012 [–]

> But yes, you're right that maps require a join table.

Not in postgres: http://www.postgresql.org/docs/9.1/static/hstore.html

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